Ce-Y复合添加对T91耐热钢组织与力学性能的影响

doi:10.13251/j.issn.0254-6051.2025.09.040

摘要/Abstract

摘要： 利用真空感应炉制备未添加与添加稀土元素Ce和Y的T91试验钢,系统考察了Ce-Y复合添加对T91钢中夹杂物演变、显微组织及力学性能的影响。结果表明,未添加稀土的T91钢中夹杂物主要是具有棱角的Mg-Al-O系氧化物和由(Nb,V,Ti)(C,N) 碳氮化物包覆Mg-Al-O氧化物构成的复合夹杂物,而加入稀土Ce和Y显著降低了钢液中的氧含量,促使夹杂物转变为球状的稀土氧化物、硫化物和硫氧化物,其尺寸亦得到细化,平均尺寸从未经稀土处理的2.8 μm降低至1.9 μm。此外,稀土的加入还显著细化了晶粒尺寸,平均粒径从18.2 μm降至8.7 μm,增强了细晶强化效果,显著提升了T91耐热钢的强度与塑性。

关键词: 耐热钢, Ce-Y复合添加, 夹杂物演变, 微观组织, 稀土元素, 力学性能

Abstract: Tested steels T91 without and with rare earth elements Ce and Y were prepared by vacuum induction furnace. The effect of Ce-Y composite addition on the evolution of inclusions, microstructure and mechanical properties of the T91 tested steels was systematically investigated. The results show that the inclusions in T91 steel without rare earth addition are mainly composed of Mg-Al-O oxides with angularity and composite inclusions composed of Mg-Al-O oxides coated by (Nb,V,Ti)(C,N) carbonitrides. The addition of rare earth Ce and Y significantly reduces the oxygen content in the molten steel and promotes the transformation of inclusions into spherical rare earth oxides, sulfides and sulfur oxides, their dimensions are also refined, and the average size is reduced from 2.8 μm without rare earth treatment to 1.9 μm. In addition, the addition of rare earth significantly refines the grain, and the average grain size decreases from 18.2 μm to 8.7 μm, enhancing the effect of fine grain strengthening and significantly improving the strength and plasticity of T91 heat-resistant steel.

Key words: heat-resistant steel, Ce-Y composite addition, inclusion evolution, microstructure, rare earth element, mechanical properties

中图分类号:

TG142.1

李根, 刘俊, 唐正焮, 贾雷, 何西扣. Ce-Y复合添加对T91耐热钢组织与力学性能的影响[J]. 金属热处理, 2025, 50(9): 250-256.

Li Gen, Liu Jun, Tang Zhengxin, Jia Lei, He Xikou. Effect of Ce-Y composite addition on microstructure and mechanical properties of T91 heat-resistant steel[J]. Heat Treatment of Metals, 2025, 50(9): 250-256.

参考文献

[1] Luo L, Jiang Z, Xiao Z, et al. Cracking and exfoliation behavior of oxide scale on T91 steel under different tensile stresses in oxygen-controlled lead-bismuth eutectic at 550 ℃[J]. Corrosion Science, 2021, 183: 109324.
[2] Xu Y W, Song S H, Wang J W. Effect of rare earth cerium on the creep properties of modified 9Cr-1Mo heat-resistant steel[J]. Materials Letters, 2015, 161: 616-619.
[3] Mashuku S, Wagatsuma K. Cathodoluminescence analysis of nonmetallic inclusions in steel deoxidized and desulfurized by rare-earth metals (La, Ce, Nd)[J]. Metallurgical and Materials Transactions B, 2020, 51: 79-84.
[4] Wang H, Wang H, Wang H, et al. Effect of Ce on the cleanliness, microstructure and mechanical properties of high strength low alloy steel Q690E in industrial production process[J]. International Journal of Minerals Metallurgy and Materials, 2019, 26: 1372-1384.
[5] Wang H, Xiong L, Zhang L, et al. Investigation of RE-O-S-As inclusions in high carbon steels[J]. Metallurgical and Materials Transactions B, 2017, 48: 2849-2858.
[6] Li D. Low-oxygen rare earth steels[J]. Nature Materials, 2022, 21(10): 1137-1143.
[7] 林勤, 宋波, 郭兴敏, 等. 钢中稀土微合金化作用与应用前景[J]. 稀土, 2001, 22(4): 31-36.
Lin Qin, Song Bo, Guo Xingmin, et al. Effects of RE on microalloying in steel and application prospects[J]. Chinese Rare Earths, 2001, 22(4): 31-36.
[8] 刘香军, 杨昌桥, 任慧平, 等. 固溶Ce对α-Fe力学性能影响的机理研究[J]. 功能材料, 2022, 53(8): 8024-8030.
Liu Xiangjun, Yang Changqiao, Ren Huiping, et al. Mechanism study of effect of solute rare earth Ce on mechanical properties of α-Fe[J]. Journal of Functional Materials, 2022, 53(8): 8024-8030.
[9] 王英虎, 郑淮北, 刘庭耀, 等. 固溶处理对53Cr21Mn9Ni4N耐热钢组织及碳化物的影响[J]. 金属热处理, 2022, 47(4): 39-45.
Wang Yinghu, Zheng Huaibei, Liu Tingyao, et al. Effect of solid solution treatment on microstructure and carbides of 53Cr21Mn9Ni4N heat-resistant steel[J]. Heat Treatment of Metals, 2022, 47(4): 39-45.
[10] 杨建栋, 谢碧君, 徐斌, 等. 稀土Ce含量对S355NL低合金钢夹杂物及铸态组织与硬度的影响[J]. 金属热处理, 2024, 49(12): 122-128.
Yang Jiandong, Xie Bijun, Xu Bin, et al. Effect of Ce content on inclusions and as-cast microstructure and hardness of S355NL low alloy steel[J]. Heat Treatment of Metals, 2024, 49(12): 122-128.
[11] 史学红, 杨礼林, 夏明, 等. 稀土Ce含量对4Cr5MoSiV1钢中夹杂物的变质作用[J]. 金属热处理, 2022, 47(11): 223-229.
Shi Xuehong, Yang Lilin, Xia Ming, et al. Modification effect of rare earth Ce content on inclusions in 4Cr5lMoSiV1 steel[J]. Heat Treatment of Metals, 2022, 47(11): 223-229.
[12] Wang H, Bao Y P, Zhi J G, et al. Effect of rare earth Ce on the morphology and distribution of Al₂O₃ inclusions in high strength IF steel containing phosphorus during continuous casting and rolling process[J]. ISIJ International, 2021, 61(3): 657-666.
[13] Geng R, Li J, Shi C. Evolution of inclusions with Ce addition and Ca treatment in Al-killed steel during RH refining process[J]. ISIJ International, 2021, 61(5): 1506-1513.
[14] Zhao Y, Shi C B, Wang S J, et al. Reoxidation of liquid steel and evolution of inclusions during protective atmosphere electroslag remelting of Ce-containing heat-resistant stainless steel[J]. Journal of Iron and Steel Research International, 2024, 31(8): 1923-1935.
[15] Jiang X, Li G, Tang H, et al. Modification of inclusions by rare earth elements in a high-strength oil casing steel for improved sulfur resistance[J]. Materials, 2023, 16(2): 675.
[16] Wang X, Li G, Liu Y, et al. Cerium addition effect on modification of inclusions, primary carbides and microstructure refinement of H13 die steel[J]. ISIJ International, 2021, 61(6): 1850-1859.
[17] Huang Y, Jin X, Cai G. Evolution of microstructure and mechanical properties of a new high strength steel containing Ce element[J]. Journal of Materials Research, 2017, 32(20): 3894-3903.
[18] Jiang M Z, Yu Y C, Li H, et al. Effect of rare earth cerium addition on microstructures and mechanical properties of low carbon high manganese steels[J]. High Temperature Materials and Processes, 2017, 36(2): 145-153.
[19] Yan J, Gao Y, Liang L, et al. Effect of yttrium on the cyclic oxidation behaviour of HP40 heat-resistant steel at 1373 K[J]. Corrosion Science, 2011, 53(1): 329-337.
[20] 罗杰斌, 黄勇, 王帅, 等. 稀土改性铸造Fe-24Cr-32Ni型耐热钢高温氧化行为的研究[J]. 铸造, 2023, 72(1): 22-27.
Luo Jiebin, Huang Yong, Wang Shuai, et al. Study on high temperature oxidation behavior of cast Fe-24Cr-32Ni steel modifed by rare earth[J]. Foundry, 2023, 72(1): 22-27.
[21] Chen L, Ma X, Wang L, et al. Effect of rare earth element yttrium addition on microstructures and properties of a 21Cr-11Ni austenitic heat-resistant stainless steel[J]. Materials & Design, 2011, 32(4): 2206-2212.
[22] Wang R, Bao Y P Yan Z J, et al. Comparison between the surface defects caused by Al₂O₃ and TiN inclusions in interstitial-free steel auto sheets[J]. International Journal of Minerals, Metallurgy, and Materials, 2019, 26(2): 178-185.
[23] 富晓阳, 杨吉春, 蒋学智, 等. Ce对T91耐热钢夹杂物的变质及冲击韧性的影响[J]. 稀土, 2015, 36(5): 60-65.
Fu Xiaoyang, Yang Jichun, Jiang Xuezhi, et al. Effects of Ce on the inclusions and impact toughness of T9l heat-resistant steel[J]. Chinese Rare Earths, 2015, 36(5): 60-65.
[24] Gu C, Bao Y P, Gan P, et al. Effect of main inclusions on crack initiation in bearing steel in the very high cycle fatigue regime[J]. International Journal of Minerals, Metallurgy, and Materials, 2018, 25(6): 623-629.
[25] Yong X, Zhiguo C, Xiang W, et al. Influence of Ce on microstructure and properties of high-carbon high-boron steel[J]. Rare Metal Materials and Engineering, 2015, 44(6): 1335-1339.
[26] Adabavazeh Z, Hwang W, Su Y. Effect of adding cerium on microstructure and morphology of Ce-based inclusions formed in low-carbon steel[J]. Scientific Reports, 2017, 7(1): 46503.
[27] 黄宇, 成国光, 谢有. 稀土Ce对钎具钢中夹杂物的改质机理研究[J]. 金属学报, 2018, 54(9): 1253-1261.
Huang Yu, Cheng Guoguang, Xie You. Modification mechanism of cerium on the inclusions in drill steel[J]. Acta Metallurgica Sinica, 2018, 54(9): 1253-1261.
[28] 王佳喜, 王东伟, 邱国兴, 等. 外加Y₂Ti₂O₇纳米粒子对CLAM钢夹杂物的影响[J]. 北京科技大学学报, 2020, 42(S1): 21-26.
Wang Jiaxi, Wang Dongwei, Qiu Guoxing, et al. Effect of Y₂Ti₂O₇ nanoparticles on inclusions in CLAM steel[J]. Journal of University of Science and Technology Beijing, 2020, 42(S1): 21-26.