4330M钢连续冷却过程中的组织转变特征

doi:10.13251/j.issn.0254-6051.2022.07.033

摘要/Abstract

摘要： 采用Gleeble-3500热模拟试验机对4330M钢进行连续冷却转变试验,研究了冷却速率在0.8~10 ℃/s范围内连续冷却过程中组织结构转变特征。采用热膨胀、硬度测试及彩色金相等试验测定4330M钢的连续冷却转变(CCT)曲线。结果表明,4330M钢在冷却过程中存在铁素体、贝氏体和马氏体相变区,没有珠光体相变区。随着冷却速率的增加,过冷奥氏体依次分解为铁素体+粒状贝氏体、粒状贝氏体+下贝氏体+马氏体和完全马氏体,马氏体的临界冷却速率约为3 ℃/s。下贝氏体中铁素体和渗碳体的取向关系为(110)_α//(102)_Fe₃C和[111]_α//[201]_Fe₃C。结合维氏硬度试验与彩色金相定量分析,建立了4330M钢硬度-体积分数模型HBW=-0.07-4.69f_F+4.02f_GB+4.63f_LB+4.82f_M。

关键词: 连续冷却转变, 组织, 彩色金相, 硬度-体积分数模型

Abstract: Continuous cooling transformation test of 4330 M steel was carried out by Gleeble-3500 thermal simulation test machine, and the microstructure transformation characteristic during continuous cooling process between cooling rate of 0.8-10 ℃/s was studied. The CCT curves of the steel were determined by means of thermal dilatometry method, hardness test and color metallography. The results show that the CCT curves of the 4330M steel contain ferrite, bainite and martensite transformation region, but there is no pearlite transformation region. With the increase of cooling rate, supercooled austenite is decomposed into ferrite+granular bainite, granular bainite+lower bainite+martensite and full martensite in turn. The critical cooling rate of martensite transformation is ascertained to be about 3 ℃/s. The orientation relationship of ferrite and cementite in lower bainite is (110)_α∥(102)_Fe₃C and [111]_α//[201]_Fe₃C. Combined the Vickers hardness test and quantitative analysis of color metallography, a hardness-volume fraction model is established to predict the hardness of 4330M steel as HBW=-0.07-4.69f_F+4.02f_GB+4.63f_LB+4.82f_M.

Key words: continuous cooling transformation, microstructure, color metallography, hardness-volume fraction model

中图分类号:

TG142.1⁺1

沈慧, 刘云鹏, 斯庭智. 4330M钢连续冷却过程中的组织转变特征[J]. 金属热处理, 2022, 47(7): 190-196.

Shen Hui, Liu Yunpeng, Si Tingzhi. Microstructure transformation characteristic of 4330M steel during continuous cooling process[J]. Heat Treatment of Metals, 2022, 47(7): 190-196.

参考文献

[1]徐磊. 高温回火对4330V钢组织及力学性能的影响分析[J]. 石化技术, 2020, 27(10): 46-47.
Xu Lei. Effort of high temperature tempering on microstructure and mechanical properties of 4330V steel[J]. Petrochemical Technology, 2020, 27(10): 46-47.
[2]孙荣, 赵钧羡, 段隆臣, 等. 高温回火对4330V钢组织及力学性能的影响[J]. 热加工工艺, 2016, 45(12): 187-189.
Sun Rong, Zhao Junxian, Duan Longchen, et al. Influence of high temperature tempering on microstructure and mechanical properties of 4330V steel[J]. Hot Working Technology, 2016, 45(12): 187-189.
[3]Bitterlin M, Shahriari D, Lapierre-Boire L P, et al. Hot deformation behavior of a nickel-modified AISI 4330 steel[J]. ISIJ International, 2018, 58(9): 1711-1720.
[4]Mangonon P L. Relative hardenabilities and interaction effects of Mo and V in 4330 alloy steel[J]. Metallurgical and Materials Transaction A, 1982, 13(2): 319-320.
[5]卢银德. 大型锻件的热处理工艺[J]. 金属热处理, 2004, 29(4): 47-49.
Lu Yinde. Heat treatment of large-size forged parts[J]. Heat Treatment of Metals, 2004, 29(4): 47-49.
[6]左永平, 林天泉, 郑益, 等. 大型锻件采用水溶性淬火介质淬火的工艺控制[J]. 大型铸锻件, 2010(1): 20-24.
Zuo Yongping, Lin Tianquan, Zheng Yi, et al. The quenching process control for large forging using ploymer quenchant[J]. Heavy Casting and Forging, 2010(1): 20-24.
[7]李钊, 赵进, 赵莉萍, 等. 终冷温度对中碳合金钢组织和性能的影响[J]. 包钢科技, 2019, 45(5): 45-48.
Li Zhao, Zhao Jin, Zhao Liping, et al. Effect of finish cooling temperature on microstructure and properties of medium carbon alloy steel[J]. Science and Technology of Baotou Steel, 2019, 45(5): 45-48.
[8]Qiao Z X, Liu Y C, Yu L M, et al. Formation mechanism of granular bainite in a 30CrNi3MoV steel[J]. Journal of Alloy and Compounds, 2012, 475(1/2): 560-564.
[9]Qiao Z X, Liu Y C, Ning B Q, et al. Bainitic transformation behavior of ultra-high strength 30CrNi3MoV steel after experiencing small deformation in the nonrecrystallization austenite region[J]. Journal of Materials Research, 2013, 28(20): 2844-2851.
[10]Tomita Y. Mechanical properties of modified heat treated silicon modified 4330 steel[J]. Materials Science and Technology, 1995, 11(3): 259-263.
[11]刘贤强, 卜恒勇, 李其, 等. A668钢CCT曲线的预测和验证[J]. 金属热处理, 2020, 45(10): 154-160.
Liu Xianqiang, Bu Hengyong, Li Qi, et al. Prediction and verification of CCT curves of A668 steel[J]. Heat Treatment of Metals, 2020, 45(10): 154-160.
[12]马浩冉, 刘洪波, 刘崇, 等. EH460级船板钢的动态CCT曲线与组织演变[J]. 金属热处理, 2020, 45(10): 160-163.
Ma Haoran, Liu Hongbo, Liu Chong, et al. Dynamic CCT curves and microstructure evolution of EH460 ship plate steel[J]. Heat Treatment of Metals, 2020, 45(10): 160-163.
[13]郭海霞, 黄安琪. 合金钢中复相组织的彩色金相浸蚀方法[J]. 理化检测(物理分册), 2019, 55(8): 547-549.
Guo Haixia, Huang Anqi. Color metallographic etching method of multiphase microstructure in alloy steel[J]. Physical Testing and Chemical Analysis Part A: Physical Testing, 2019, 55(8): 547-549.
[14]Ye J S, Chang H B, Xu Z Y. Modeling for formation of proeutectoid ferrite in steel during continuous cooling[J]. Journal of Iron and Steel Research International, 2004, 11(6): 33-36.
[15]Yin J Q, Hillert M, Borgenstam A. Morphology of proeutectoid ferrite[J]. Metallurgical and Materials Transactions A, 2017, 48(3): 1425-1443.
[16]Militzer M, Pandi R, Hawbolt E B. Ferrite nucleation and growth during continuous cooling[J]. Metallurgical and Materials Transactions A, 1996, 27(6): 1547-1556.
[17]刘宗昌, 计云萍. 贝氏体相变新理论及研究历程[J]. 热处理, 2018, 33(5): 7-14.
Liu Zongchang, Ji Yunping. New theory and progress in study on bainite phase transformation[J]. Heat Treatment, 2018, 33(5): 7-14.
[18]Bramfitt B L, Speer J G. A perspective on the morphology of bainite[J]. Metallurgical Transactions A, 1990, 21(3): 817-829.
[19]Trzaska J. Empirical formulas for the calculations of the hardness of steels cooled from the austenitizing temperature[J]. Archives of Metallurgy and Materials, 2016, 61(3): 1297-1302.
[20]Lee S J, Lee Y K. Effect of austenite grain size on martensitic transformation of a low alloy steel[J]. Materials Science Forum, 2005, 475: 3169-3172.
[21]Contreras A, Lopez A, Gutierrez E J, et al. An approach for the design of multiphase advanced high-strength steels based on the behavior of CCT diagrams simulated from the intercritical temperature range[J]. Materials Science and Engineering A, 2020, 772: 138708.
[22]Pickering E J, Collins J, Stark A, et al. In situ observations of continuous cooling transformations in low alloy steels[J]. Materials Characterization, 2020, 165: 110355.
[23]An F C, Zhao S X, Xue X K, et al. Incompleteness of bainite transformation in quenched and tempered steel under continuous cooling conditions[J]. Journal of Materials Research and Technology, 2020, 9(4): 8985-8996.
[24]Qiao Z X, Liu Y C, Yu L M, et al. Incompleted bainitic transformation characteristics in an isochronally annealed 30CrNi3MoV steel[J]. Journal of Alloys and Compounds, 2009, 478(1): 334-340.
[25]Dobrzański L A, Trzasak J. Application of neural networks for prediction of hardness and volume fractions of structural components in constructional steels cooled from the austenitizing temperature[J]. Materials Science Forum, 2003, 437(2): 359-362.
[26]Ebrahimian A, Banadkouki S S G. Mutual mechanical effects of ferrite and martensite in a low alloy ferrite-martensite dual phase steel[J]. Journal of Alloys and Compounds, 2017, 708(25): 43-54.
[27]Trzaska J. Calculation of the steel hardness after continuous cooling[J]. Archives of Materials Science and Engineering, 2013, 61(2): 87-92.