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  Effect of solution temperature on mechanical properties and corrosion resistance of super duplex stainless steel 2507 Gu Guochao, Li Ruifen, Xin Zhenmin, Xiang Lixin, Xu Wenhua, Lü Yupeng Heat Treatment of Metals    2022, 47 (6): 1-6.   doi:10.13251/j.issn.0254-6051.2022.06.001 Abstract （197）      PDF （3745KB）（346）       Knowledge map    Effect of solution temperature on microstructure, mechanical properties and corrosion resistance of 2507 super duplex stainless steel was investigated by using optical microscope, scanning electron microscopy, XRD, tensile test and electrochemical analysis. The thermodynamic equilibrium phase diagram of the 2507 duplex stainless steel was calculated by Thermo-Calc thermodynamic software and compared with the test results. The results show that σ phase can be eliminated by solution treatment at temperatures higher than 1050 ℃. With the increase of solution temperature, the content of ferrite phase increases, the content of austenite phase decreases, and the volume fraction ratio of α/γ increases. The duplex stainless steel has better comprehensive mechanical properties after solution treatment at 1050-1100 ℃ for 30 min and water cooling, of which the yield strength, tensile strength and elongation are more than 600 MPa, 840 MPa and 35%, respectively. The duplex stainless steel can obtain better corrosion resistance after solution treatment at 1050 ℃ for 30 min. Reference | Related Articles | Metrics

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  Heat treatment for toughening technology of cold working die steel SKD11 Yuan Zhizhong, Wang Mengfei, Zhang Bocheng, Duan Xubin, Li Biaomin, Yang Haifeng, Luo Rui, Cheng Xiaonong Heat Treatment of Metals    2023, 48 (9): 1-7.   doi:10.13251/j.issn.0254-6051.2023.09.001 Abstract （235）      PDF （5140KB）（289）       Knowledge map    SKD11 steel plate after hot rolling and spheroidizing annealing was used. Two kinds of complex phase heat treatment processes, A-Q-A (Austempering-Quenching-Austempering) and Q-T-A (Quenching-Tempering-Austempering), as well asconventional Q-T(Quenching-Tempering) heat treatment process were carried out.The effect of heat treatment process on the microstructure, hardness and impact absorbed energy was studied. The results show that the microstructure of the specimens after A-Q-A and Q-T-A is the combination of lower bainite (LB) and martensite (M). The content of retained austenite is 13.2% and 18.6% for A-Q-A and Q-T-A, respectively. After A-Q-A, Q-T-A and conventional heat treatment Q-T, the hardness of the specimens is 58.5, 58.6 and 60.5 HRC and the impact absorbed energy is 31.3, 27.6 and 15 J, respectively. The excellent combination of strength and toughness of the SKD11 steel plate is realized by the duplex-phase heat treatments, which does a beneficial exploration in improving the toughness of the cold working die steel. Reference | Related Articles | Metrics

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  Hot deformation behavior and microstructure evolution of TC11 titanium alloy Lü Xuechun, Zhao Wenge, Yuan Mingrong, Li Heng Heat Treatment of Metals    2023, 48 (5): 279-282.   doi:10.13251/j.issn.0254-6051.2023.05.044 Abstract （96）      PDF （2582KB）（240）       Knowledge map    Deformation behavior and microstructure evolution of the TC11 titanium alloy at high temperatures were investigated. The results show that the flow stress of the alloy decreases as the deformation temperature increases and the strain rate decreases during deformation, and the degree of softening of the flow stress increases as the strain rate increases. By analysis of the processing map at true strain of 0.6, the highest energy dissipation rate is found at 940 ℃ and 0.001 s-1 and reaching 0.71. The plastic instability zone is found in the range of 920-930 ℃ and 0.9-10 s-1. The dynamic recrystallization of the α-phase during hot deformation of the TC11 titanium alloy is promoted by increase of the strain rate, the deformation volume and the deformation temperature. Reference | Related Articles | Metrics

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  Effect of solution and aging treatment on impact properties of ZL108 aluminum alloy Tan Guoyin Heat Treatment of Metals    2023, 48 (5): 291-293.   doi:10.13251/j.issn.0254-6051.2023.05.047 Abstract （46）      PDF （1272KB）（227）       Knowledge map    Impact properties of the ZL108 aluminum alloy after solution aging treatment were studied by means of OM, SEM and impact testing machine. The results show that the as-cast microstructure is mainly composed of α solid solution, coarse eutectic silicon and bulk primary silicon. After solution and aging treatment, the precipitated phase is fine and evenly distributed, with a morphology similar to short rod or coral shaped, which can better pin dislocations and help improve the impact properties of the material. The non-equilibrium distribution of elements in the as-cast specimens results in the production of a large amount of refractory eutectic silicon and bulk primary silicon. After solution and aging treatment, the precipitated phase particles continue to break under high temperature, and most of them are remelted into the matrix. The remaining precipitate particles have smaller sizes, which can better coordinate the deformation of the matrix and improve the impact properties of the specimen by 6.6 times. Reference | Related Articles | Metrics

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  Design and implementation of materials database for heat treatment process simulation Zhang Lunfeng, Wang Zhihan, Zhao Junyu, An Kang, Xu Jun, Gu Jianfeng Heat Treatment of Metals    2023, 48 (9): 247-252.   doi:10.13251/j.issn.0254-6051.2023.09.042 Abstract （72）      PDF （3415KB）（212）       Knowledge map    Material parameters are the crucial data support in heat treatment process simulation. However, at present, there is a lack of relevant material databases in China, and a few existing databases have problems such as low data accuracy, poor integrity, and inability to share data, they only distinguish materials based on chemical composition, which cannot meet the parameter requirements of heat treatment process simulation. Therefore, a data structure focusing on chemical composition and microstructure was designed, and an online special material database was also independently developed. The database optimizes the data storage structure according to the characteristics of material parameters required for heat treatment process simulation. Adopting B/S architecture design realizes data sharing and improves the convenience of data use. Furthermore, by using data mining technology, the database introduces four machine learning algorithms: multivariable linear regression, Bayesian linear regression, decision tree, and random forest, and establishes an innovative data extraction mechanism. The effective data extraction strategy can be determined through the application analysis of existing data, and then the actual data requires at present can be obtained, which preliminarily solves the problem of data missing currently, and strongly supports the development of heat treatment process simulation. Reference | Related Articles | Metrics

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  Effects of rare earth elements Ce and Y on high temperature oxidation behavior of JG4246A alloy Chen Chonglin, Wang Jun'an, Yu Jianbo, Tu Yuguo, Zhang Meng, Li Mengli Heat Treatment of Metals    2023, 48 (5): 78-82.   doi:10.13251/j.issn.0254-6051.2023.05.013 Abstract （59）      PDF （2724KB）（193）       Knowledge map    In the secondary generation superalloy JG4246A, rare earth elements Ce and Y were added to obtain four kinds of tested alloy ingots with addition of 0.012Ce (mass fraction, %, the same below), 0.017Ce, 0.034Y and 0.061Y, respectively. The effects of Ce and Y on high temperature oxidation resistance of these alloys at 1100 ℃ were studied. The phase composition and the morphology of oxidized surface were analyzed by means of X-ray diffractometer (XRD) and scanning electron microscope (SEM). The results indicate that the oxidation mass gain of the JG4246A alloy can be reduced by adding rare earth elements during the isothermal oxidation process at 1100 ℃ in air, and the oxidation kinetics of the JG4246A alloys conforms to parabolic law. Compared to the rare earth element Y, Ce has a more significant effect on slowing down the high temperature oxidation rate of the JG4246A alloy. The addition of rare earth elements does not change the surface morphology of the oxide film, but the spinel oxide makes the oxide film more compact, which can inhibit the outward diffusion of cations and reduce the oxidation reaction rate, thus improving the oxidation resistance at high temperature. Reference | Related Articles | Metrics

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  Effect of vacuum low pressure carburizing on microstructure and properties of austenitic stainless steels 304 and 316L Cheng Ru, Tian Yong, Song Chaowei, Wang Haojie Heat Treatment of Metals    2022, 47 (9): 1-5.   doi:10.13251/j.issn.0254-6051.2022.09.001 Abstract （230）      PDF （660KB）（192）       Knowledge map    Surface strengthening of 304 and 316L austenitic stainless steels was processed by using vacuum low pressure carburizing process. The microstructure, phase composition and microhardness distribution of the carburized layers were analyzed by means of optical microscope, scanning electron microscope, Thermo-Calc software, X-ray diffractometer and microhardness tester. The offsets of different diffraction peaks in the carburized layers and the changes in lattice parameters before and after carburizing of the tested steels were calculated. Combined with the effects of molybdenum on carburizing process of the austenitic stainless steels, the differences in the carburized layer thickness, surface hardness and mechanism of carbides precipitation after carburizing of 304 and 316L austenitic stainless steels were compared and studied. The results show that the carburized layers produced by 750 ℃ carburizing for 2.6 h are composed of expanded austenite and Cr23C6 phases, the austenite lattice constant has increased by 1.33% and 1.14% respectively for 304 and 316L stainless steels, and Cr23C6 is mainly precipitated in strip shape on the expanded austenite grain boundaries. The surface hardness of the 304 and 316L stainless steels after carburizing at 750 ℃ for 2.6 h is over 2 times higher than that of substrate. Reference | Related Articles | Metrics

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  Effect of chemical composition on heat treatment properties of X32 steel for bimetal saw blade Zeng Bin, Wang Jing, Liang Liang, Chen Gang, Su Bin Heat Treatment of Metals    2023, 48 (5): 83-89.   doi:10.13251/j.issn.0254-6051.2023.05.014 Abstract （86）      PDF （4321KB）（189）       Knowledge map    Two X32 steels with different contents of C and N were prepared in order to develop novel X32 steel material with lower alloy content and more economical production cost. The feasibility was discussed through the characterization of properties and microstructure. The static CCT curves of two X32 steels were presented, and microstructure and mechanical properties of the hot rolled intermediate billet of these two steels after heat treatment were studied. The heat treatment experimental result was verified by industrial trial production of the two X32 steel cold strips. The research shows that X32 steel can achieve obvious microstructure refinement, strength and hardness improvement by increasing C and N content by adopting V-C and V-N microalloying technology. Therefore, without affecting quality, it is feasible to reduce the content of Ni, Cr and Mo alloy but increasing the content of C and N by using V-C and V-N microalloying technology, which points out the direction for developing new X32 steel with more economic production cost. Reference | Related Articles | Metrics

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  Evolution of microstructure and macrotexture of 3.1%Si oriented silicon steel Liu Yongzhen, Dong Lili, Liu Baozhi, Zhang Hao, Ma Yonglin Heat Treatment of Metals    2023, 48 (9): 238-241.   doi:10.13251/j.issn.0254-6051.2023.09.040 Abstract （80）      PDF （2289KB）（179）       Knowledge map    Microstructure and macroscopic textures of 3.1%Si oriented silicon steel during first cold rolling, decarburizing annealing, second cold rolling, high temperature annealing and tensile leveling annealing were analyzed by means of Zeiss microscope, X-ray diffractometer and other testing instruments. The results show that microstructure of the oriented silicon steel is ferrite. The average grain size is 10.23 μm after first recrystallization during decarburizing annealing, and reaches 2.0 cm after second recrystallization during high temperature annealing, and grows to 2.3 cm with increasing of uniformity after tensile leveling annealing. The main texture type of the oriented silicon steel after decarburization annealing is γ fiber texture, with a small amount of Goss texture {110}<001>. After high temperature annealing, the texture type is mainly Goss texture {110}<001>. After tensile leveling annealing, the Goss texture reaches the strongest and sharpest degree. Reference | Related Articles | Metrics

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  Effects of solution and aging treatments on mechanical properties and microstructure of Al-Cu-Mn-Er cast alloy Wu Yang, Huang Hui, Shi Wei, Wen Shengping, Wu Xiaolan, Rong Li, Wei Wu Heat Treatment of Metals    2022, 47 (6): 7-12.   doi:10.13251/j.issn.0254-6051.2022.06.002 Abstract （175）      PDF （4148KB）（178）       Knowledge map    Effects of different solution and aging treatments on microstructure and mechanical properties of Al-Cu-Mn-Er alloy were studied by optical microscope, scanning electron microscope, XRD, DSC test, hardness test and tensile test. The results show that the optimal process of solution and aging treatments of the as-cast alloy is solution treating at 540 ℃ for 12 h and aging at 185 ℃ for 6 h, under which there is no overheating or "overburning" phenomena, the solute atoms are fully diffused, and a large amount of residual phases generated during the casting process are redissolved into the matrix. Meanwhile, the alloy has the highest hardness value of 142.28 HV0.1, tensile strength of 370.37 MPa, yield strength of 300.34 MPa, and elongation of 6.50%. Reference | Related Articles | Metrics

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  Effect of subcritical heat treatment on microstructure and properties of high chromium cast irons Yuan Zhizhong, Liu Haiming, Ju Yulin, Chen Lu, Niu Zongran, Wang Zhiyuan, Cao Fuyang, Cheng Xiaonong Heat Treatment of Metals    2024, 49 (10): 1-7.   doi:10.13251/j.issn.0254-6051.2024.10.001 Abstract （244）      PDF （4765KB）（173）       Knowledge map    Aiming at the problem of high energy consumption in conventional quenching and tempering process of high chromium cast irons, the subcritical heat treatment tests of three kinds of high chromium cast irons were carried out. Moreover, the effect of the process on the microstructure, hardness and surface wear resistance was studied. The results show that the microstructure of high chromium cast irons is primarily composed of retained austenite, M7C3 carbide, (Fe, Cr)23C6 carbide, Mo2C carbide and pearlite when subjected to holding temperatures ranging from 500 ℃ to 650 ℃ for 1 h to 14 h. A peak value in hardness is observed for the three high chromium cast irons when holding at 550 ℃ to 600 ℃ for 6 h to 12 h, with the highest peak hardness being 57.4 HRC. The hardness is most significantly influenced by the Mo element. During the insulation process, the pearlite phase transformation of austenite is promoted by the precipitation of secondary carbides in high chromium cast irons. The effects of pearlite transformation strengthening and precipitation strengthening of secondary carbides gradually decrease with prolonged holding time. The eutectic high chromium cast iron with the highest carbon content exhibits the best wear resistance when holding at 600 ℃ for 8 h. It can be seen that the first step to improve the wear resistance of high chromium cast irons is to increase the amount of eutectic carbides, and then to add elements such as Mo to enhance the precipitation strengthening effect. Reference | Related Articles | Metrics

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  Strength evolution law of electric heat treated commercially pure Al wire Zhang Yi, Hou Jiapeng, Yuan Qulong, Zhang Zhenjun, Chen Ling, Zhang Zhefeng Heat Treatment of Metals    2023, 48 (5): 49-53.   doi:10.13251/j.issn.0254-6051.2023.05.008 Abstract （53）      PDF （3454KB）（169）       Knowledge map    Traditionally annealing and electric heat treatment of commercially pure Al wire were carried out by using drying oven and current-providing device, respectively. The influence law and mechanism of traditionally annealing and electrical heat treatment at different temperatures on strength and microstructure of the commercially pure Al wire were investigated. The results show that when the heat treatment temperature is the same, the tensile strength and the grain size of the electric heated commercially pure Al wire is respectively lower and larger than those of the traditionally annealed, the main mechanism of which is the overheating caused by local Joule heating effect on grain boundaries in the commercially pure Al wire. Reference | Related Articles | Metrics

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  Microstructure and wear resistance of AlCoCrFeMnZr near-eutectic high-entropy alloy Wang Zhixin, Yang Cheng, Ma Mingxing, Wang Bozhen, Dong Chen, Li Shangzhi, Hou Runsen Heat Treatment of Metals    2023, 48 (1): 1-5.   doi:10.13251/j.issn.0254-6051.2023.01.001 Abstract （191）      PDF （695KB）（166）       Knowledge map    AlCoCrFeMnZr near-eutectic high-entropy alloy was prepared by vacuum melting, then its crystal structure, morphology, hardness and wear resistance were tested by means of XRD, SEM, microhardness tester and friction and wear testing machine. The results show that the phase structure of the AlCoCrFeMnZr alloy is BCC+HCP dual-phase structure, composing of primary phase and fine lamellar eutectic. The primary phase consists of the HCP phase enriched in Cr, Fe, and Zr, which grows in a dendritic manner. The main elements in the dendrite region (α phase) of the lamellar eutectic structure are Co, Cr and Fe, and the main elements in the intergranular (β phase) are Al and Zr, which conforms to the structure and element distribution of high-entropy alloys. The wear model changes from adhesive wear and abrasive wear to oxidative wear, and the friction factor shows a trend of increasing first and then decreasing, and the average friction factor is 0.5432, the microhardness is 768.8 HV0.5, that means the alloy has excellent hardness and wear resistance. Reference | Related Articles | Metrics

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  Laser quenching process optimization and microstructure and properties of H13 steel Ma Xin, Shi Qiang, Chen Yanzhong, Li Qiang, Zhang Yueting, Zhao Long Heat Treatment of Metals    2023, 48 (7): 266-270.   doi:10.13251/j.issn.0254-6051.2023.07.044 Abstract （68）      PDF （2574KB）（160）       Knowledge map    Surface of H13 steel was strengthened by laser quenching, and the quenching process was optimized by range analysis of orthogonal test. The microhardness and friction and wear properties of the specimen under the optimum process parameters were studied, and the phase composition and microstructure of the laser quenching surface were analyzed. The results show that the optimum laser quenching process parameters are laser power of 600 W, scanning speed of 6 mm/s and lapping rate of 20%. Under this optimum process, the average hardness of hardened layer of the H13 steel is 774 HV0.1, which is about 3 times than that of the matrix, the depth of the hardened layer is 0.87 mm, and the friction coefficient and wear amount are about 0.367 and 0.0015 g, which are 50% and 60.5% lower than those of the matrix, respectively. The hardened layer is mainly composed of lath and acicular mixed martensite, retained austenite and a small amount of cementite. Reference | Related Articles | Metrics

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  “Thought” of metallic materials Yuan Zhizhong, Dai Qixun, Wang Andong, Ju Yulin, Cao Fuyang, Luo Rui Heat Treatment of Metals    2023, 48 (5): 1-5.   doi:10.13251/j.issn.0254-6051.2023.05.001 Abstract （141）      PDF （1390KB）（158）       Knowledge map    “Thought” of metallic materials is refined from the systematic and comprehensive perspectives. The contradictory law of the evolution process of metallic materials properties is revealed. The complexity of the role of alloy elements is summarized. The quantitative and qualitative change law of microstructure evolution of metallic materials is expounded, and the multidirectional variability of heat treatment processes is illustrated as well. Reference | Related Articles | Metrics

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  Effect of austenitization temperature on microstructure and mechanical properties of 40CrMnSi2Mo steel under air cooling Yu Linran, Liu Geng, Yang Zhuoyue, Su Jie, Ning Jing, Ding Yali Heat Treatment of Metals    2024, 49 (12): 1-8.   doi:10.13251/j.issn.0254-6051.2024.12.001 Abstract （179）      PDF （5846KB）（158）       Knowledge map    Effect of austenitization temperature (875-975 ℃) on the microstructure and mechanical properties of the novel Cr-Mn-Si series high strength medium carbon low alloy 40CrMnSi2Mo steel under air cooling condition was studied by means of optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM) and laser scanning confocal microscope (LSCM). The results show that when austenitized at 875 ℃ and 900 ℃, the microstructure is dominated by martensite with a small amount of the undissolved precipitates (NbC). The prior austenite grains are fine and stable. The tensile strength is 1997 MPa and 2003 MPa, the elongation is 11.0% and 12.0%, and the fracture toughness is 70.3 MPa·m1/2 and 73.6 MPa·m1/2, respectively. When austenitized at 975 ℃, the solubility of NbC increases and the pinning effect decreases. The growth of austenite grain size decreases the thermal stability so that the coarse bainite/martensite multiphase is obtained under air cooling. The tensile strength is 1980 MPa, the elongation is 10.5%, and the fracture toughness is only 77.6 MPa·m1/2. The effect of the austenite grain refinement on the strength and toughness of the 40CrMnSi2Mo steel is not obvious. The fine bainite/martensite multiphase can be obtained after austenitizing at 950 ℃. The mechanical properties achieve an excellent combination, with the tensile strength of 2040 MPa, the elongation of 12% and the fracture toughness of 86.6 MPa·m1/2. Reference | Related Articles | Metrics

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  Microstructure and properties of Fe-Cr-Ni gradient alloy steel by direct laser deposition Zhan Di, Chen Suiyuan, Song Xiuwen, Chen Xueting, Wang Mei Heat Treatment of Metals    2023, 48 (2): 1-9.   doi:10.13251/j.issn.0254-6051.2023.02.001 Abstract （119）      PDF （673KB）（157）       Knowledge map    An outside-strong but inside-tough 12CrNi2Y-50Cr6Ni2Y-70Cr8Ni2Y gradient alloy steel specimen was prepared by direct laser deposition technology. Then the microstructure, interfacial adhesion, hardness gradient distribution and wear resistance of the specimen were studied by means of metallographic microscope, scanning electron microscope, transmission electron microscope, hardness tester and friction testing machine. The results show that the 12CrNi2Y-50Cr6Ni2Y-70Cr8Ni2Y gradient alloy steel specimen with metallurgical bonding at the gradient transition interface and no crack inclusion defects is successfully prepared under the optimized laser deposition parameters. The microstructure of the specimen shows a change trend from (granular bainite+lath bainite+a small amount of martensite) to (lath bainite+lath martensite) to (lath martensite+plate martensite), the corresponding hardness changes as gradient distribution of 356 HV0.2 → 551 HV0.2 →712 HV0.2, and the volume wear rate as gradient distribution of 2.01×10-4 mm3·N-1·m-1 → 1.33×10-4 mm3·N-1·m-1 → 0.71×10-4 mm3·N-1·m-1. In the prepared gradient alloy steel specimen, due to the increase of C and Cr content, the hardness of the specimen shows a gradient distribution from low to high, and the wear resistance of the surface working layer is improved by nearly 2.8 times, so the outside-strong but inside-tough requirements is realized by gradient distributions of microstructure and properties. The obvious element diffusion of small-size C atoms near the transition interface of gradient alloy steel specimen promotes the metallurgical bonding of gradient interface. Reference | Related Articles | Metrics

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  Effect of ultrafine grain ferrite bimodal structure on mechanical properties of medium carbon steel Zhang Jiahao, Li Hongbin, Zhao Zhihao, Xu Haiwei, Han Yun, Tian Yaqiang, Chen Liansheng Heat Treatment of Metals    2023, 48 (5): 54-59.   doi:10.13251/j.issn.0254-6051.2023.05.009 Abstract （70）      PDF （4849KB）（155）       Knowledge map    A medium carbon steel with 0.49%C was quenched at different temperatures in two-phase zone, then cold rolled 50% and annealed to obtain the ferritic bimodal structure. The microstructure was characterized by means of scanning electron microscope (SEM) and electron backscattered diffraction(EBSD), and the effect of the bimodal structure on mechanical properties was analyzed by tensile experiments at room temperature. The results show that the average grain size of the ferrite decreases with the increase of the quenching temperature in the two-phase zone. The strength of the tested steel is the highest when quenched at 770 ℃, the elongation is the highest at 750 ℃, and the product of strength and elongation is the highest at 760 ℃. When the proportion of submicron grains is 31.4% and the peak grain sizes of coarse grains and fine grains are respectively 2.51 and 0.79 μm, the tested steel has better matching of strength and elongation. Reference | Related Articles | Metrics

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  Research progress on preparation technology and coating of nano-powder by plasma spraying Chen Baisen, Meng Junsheng, Wang You, Shi Xiaoping Heat Treatment of Metals    2023, 48 (7): 223-236.   doi:10.13251/j.issn.0254-6051.2023.07.039 Abstract （60）      PDF （3299KB）（151）       Knowledge map    In modern industry, plasma spraying technology has become an important method to improve the wear resistance and corrosion resistance of the surface of mechanical parts. As a spraying material, the nano-powder can effectively improve the wear resistance, corrosion resistance, oxidation resistance and other aspects of plasma spraying coating, which has research value in the application of surface protection of parts and components. It is of great significance for the energy conservation and environmental protection, and has become a research hot spot in the field of surface modification at home and abroad. Based on this, on the basis of a large number of literature, the preparation method of nano powder from three aspects as solid phase method, liquid phase method and gas phase method is introduced, research on the regranulation technology of nano-powder at home and abroad is summarized, the preparation methods of nano-powder feed, including spray drying, mechanical grinding and liquid phase precursor synthesis are described, and the preparation method of liquid phase precursor synthesis method is focused on. From the selection of nano-powder for plasma spraying to the preparation of coating, the application results of nano-coating in wear resistance, corrosion resistance, thermal barrier and self-lubrication are reviewed in detail, furthermore, the influence of plasma spraying parameters (spraying power, spraying distance, moving speed of spray gun, spraying gas parameters) on quality of the nano-coating is inductively analyzed. Finally, the problems and shortcomings in the preparation of plasma sprayed nano-powder feed are discussed, and the future research direction of plasma sprayed nano-coating is prospected. Reference | Related Articles | Metrics

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  Effect of stacking fault energy on deformation mechanism in face centered cubic high-entropy alloy Zhang Bo, Li Jie, Wu Kaidi, Niu Lichong, Wan Decheng, Feng Yunli Heat Treatment of Metals    2023, 48 (8): 225-234.   doi:10.13251/j.issn.0254-6051.2023.08.037 Abstract （180）      PDF （4336KB）（150）       Knowledge map    Properties of high-entropy alloys can be tuned by changing the types and ratios of alloying elements, which affect the stacking fault energy and phase stability of the alloy system, then the plastic deformation mechanism of the alloy can be changed, thus the optimal comprehensive mechanical properties can be obtained. The factors that affect the stacking fault energy of face centered cubic high-entropy alloys, and the influence of stacking fault energy on deformation mechanism, are reviewed. And the methods that can affect the mechanical properties by changing the activation order of deformation mechanisms by adjusting the stacking fault energy are prospected. Reference | Related Articles | Metrics