Heat treatment technologies for toughening of cold working die steel DC53

doi:10.13251/j.issn.0254-6051.2023.10.002

Abstract

Abstract: Duplex phase heat treatments of austempering-quenching-austempering (A-Q-A) and austempering-quenching-tempering (A-Q-T) were processed to improve the toughness of cold working die steel DC53. The influence of heat treatments on microstructure and mechanical properties of the DC53 steel was analyzed and compared with conventional heat treatment of quenching-high temperature tempering (Q-T). The results show that lower bainite/martensite (LB/M) multiphase structures with retained austenite (A_R) content of 21.7% and 16.5% is resulted from the A-Q-A and the A-Q-T specimens,respectively. The hardness of the A-Q-A and the A-Q-T specimens is 59.6 HRC and 59.9 HRC, respectively, slightly lower than that of Q-T, i.e. 62.3 HRC. However, the impact absorbed energy of these two processes are 84.9 J and 87.3 J, respectively, much higher than that of Q-T, i.e. 35.6 J. It is due to the fine grain strengthening of the duplex phase microstructure,deformation strengthening and the content increase in A_R. Therefore, excellent coordination of strength and toughness can be achieved by LB/M duplex phase heat treatment, which enable the DC53 steel to be used in service environments with impact.

Key words: DC53, duplex phase, microstructure, impact absorbed energy, retained austenite

CLC Number:

TG161

Yuan Zhizhong, Chen Lu, Zhang Bocheng, Wang Mengfei, Liu Haiming, Niu Zongran, Wang Zhiyuan, Cheng Xiaonong. Heat treatment technologies for toughening of cold working die steel DC53[J]. Heat Treatment of Metals, 2023, 48(10): 15-22.

References

[1]袁志钟, 戴起勋. 金属材料学[M]. 3版.北京: 化学工业出版社, 2018.
[2]于波. 新型冷作模具钢的性能及热处理[J]. 热处理技术与装备, 2011, 32(5): 1-3, 6.
Yu Bo. The properties and their heat treatment about new type cold-working dies steels[J]. Heat Treatment Technology and Equipment, 2011, 32(5): 1-3, 6.
[3]邱凌, 吴晓春. 国内外冷作模具钢发展概述[J]. 模具制造, 2017, 17(11): 89-96.
Qiu Ling, Wu Xiaochun. Development of cold work die steel at home and abroad[J]. Die and Mould Manufacture, 2017, 17(11): 89-96.
[4]谢殷子, 吴晓春, 李绍宏. 热处理工艺对SDC90新型冷作模具钢组织与性能的影响[J]. 机械工程材料, 2010, 34(6): 54-57.
Xie Yinzi, Wu Xiaochun, Li Shaohong. Effect of heat treatment process on microstructure and properties of new type cold work die steel SDC90[J]. Materials for Mechanical Engineering, 2010, 34(6): 54-57.
[5]邱华兴, 吴正环, 黎肖辉, 等. 稳定化处理对DC53钢力学性能及尺寸稳定性的影响[J]. 金属热处理, 2021, 46(9): 138-141.
Qiu Huaxing, Wu Zhenghuan, Li Xiaohui, et al. Effect of stabilization treatment on mechanical properties and dimensional stability of DC53 steel[J]. Heat Treatment of Metals, 2021, 46(9): 138-141.
[6]马春宇, 袁军平, 薄海瑞. 预调质处理对DC53模具钢组织和性能的影响[J]. 机械工程材料, 2013, 37(1): 29-31, 35.
Ma Chunyu, Yuan Junping, Bo Hairui. Effect of beforehand quenching and tempering process on microstructure and properties of DC53 die steel[J]. Materials for Mechanical Engineering, 2013, 37(1): 29-31, 35.
[7]Akhbarizadeh A, Shafyei A, Golozar M A. Effects of cryogenic treatment on wear behavior of D6 tool steel[J]. Materials and Design, 2009, 30(8): 3259-3264.
[8]Buss K, Mari D. High temperature deformation mechanisms in cemented carbides and cermets studied by mechanical spectroscopy[J]. Materials Science and Engineering A, 2004, 370(1/2): 163-167.
[9]Li S, Xie Y, Wu X. Hardness and toughness investigations of deep cryogenic treated cold work die steel[J]. Cryogenics, 2010, 50(2): 89-92.
[10]Preciado M, Bravo P M, Alegre J M. Effect of low temperature tempering prior cryogenic treatment on carburized steels[J]. Journal of Materials Processing Technology, 2006, 176(1/3): 41-44.
[11]Da Silva F J, Franco S D, Machado A R, et al. Performance of cryogenically treated HSS tools[J]. Wear, 2006, 261(5/6): 674-685.
[12]Xie C, Zhou L, Min N, et al. Effect of deep cryogenic treatment on carbon segregation in Cr8Mo2SiV tool steel during tempering[J]. Philosophical Magazine Letters, 2017, 97(9): 372-377.
[13]Zhirafar S, Rezaeian A, Pugh M. Effect of cryogenic treatment on the mechanical properties of 4340 steel[J]. Journal of Materials Processing Technology, 2007, 186(1/3): 298-303.
[14]Qin S, Liu Y, Hao Q, et al. The mechanism of high ductility for novel high-carbon quenching-partitioning-tempering martensitic steel[J]. Metallurgical and Materials Transactions A, 2015, 46(9): 4047-4055.
[15]Wang K, Gu K, Miao J, et al. Toughening optimization on a low carbon steel by a novel quenching-partitioning-cryogenic-tempering treatment[J]. Materials Science and Engineering A, 2019, 743: 259-264.
[16]陈秋龙, 杨安静, 林以佩. Cr12冷作模具钢下贝氏体/马氏体复相热处理工艺的研究[J]. 金属热处理, 1995, 20(9): 9-11.
Chen Qiulong, Yang Anjing, Lin Yipei. Study on heat treating of bainite/martensite dual phase of Cr12 cold work die steel[J]. Heat Treatment of Metals, 1995, 20(9): 9-11.
[17]何文超, 李志敏, 张旭, 等. 贝氏体等温淬火对H13热作模具钢组织及热疲劳性能的影响[J]. 材料热处理学报, 2021, 42(5): 81-87.
He Wenchao, Li Zhimin, Zhang Xu, et al. Effect of bainite isothermal quenching on microstructure and thermal fatigue performance of Hl3 hot working die steel[J]. Transactions of Materials and Heat Treatment, 2021, 42(5): 81-87.
[18]李洋城, 程晓农, 罗锐, 等. 热疲劳对B/M复相H13钢组织及力学性能的影响[J]. 金属热处理, 2020, 45(8): 17-21.
Li Yangcheng, Cheng Xiaonong, Luo Rui, et al. Effect of thermal fatigue on microstructure and mechanical properties of B/M multiphase H13 steel[J]. Heat Treatment of Metals, 2020, 45(8): 17-21.
[19]韦家波. M/B复相热处理工艺对H13钢组织与性能的影响规律[D]. 镇江: 江苏大学, 2020.
[20]王梦飞. SKD11冷作模具钢的增韧热处理工艺及其组织与性能研究[D]. 镇江: 江苏大学, 2023.
[21]吴红庆, 宁辉, 胡峰荣, 等. Cr8Mo1SiV冷作模具钢大颗粒共晶碳化物的控制工艺研究[J]. 模具工业, 2019, 45(12): 42-46, 63.
Wu Hongqing, Ning Hui, Hu Fengrong, et al. Study on controlling large particle eutectic carbide in Cr8MolSiV cold working die steel[J]. Die and Mould Industry, 2019, 45(12): 42-46, 63.
[22]元莎, 白玉冰, 周乐育, 等. 热处理工艺参数对Cr8冷作模具钢组织和性能的影响[J]. 锻压技术, 2020, 45(1): 168-172, 178.
Yuan Sha, Bai Yubing, Zhou Leyu, et al. Influence of heat treatment parameters on microstructure and property of Cr8 cold working die steel[J]. Forging and Stamping Technology, 2020, 45(1): 168-172, 178.
[23]迟宏宵, 马党参, 王昌, 等. Cr8Mo2SiV钢二次硬化机理的研究[J]. 金属学报, 2010, 46(10): 1181-1185.
Chi Xiaohong, Ma Dangshen, Wang Chang, et al. Study on secondary hardening mechanism of Cr8Mo2SiV steel[J]. Acta Metallurgica Sinica, 2010, 46(10): 1181-1185.
[24]Kim H, Kang J Y, Son D, et al. Evolution of carbides in cold-work tool steels[J]. Materials Characterization, 2015, 107: 376-385.
[25]王大鹏, 穆云超, 成晓哲, 等. 原料配比对放电等离子烧结钼碳化物的影响[J]. 粉末冶金技术, 2018, 36(1): 31-35.
Wang Dapeng, Mu Yunchao, Cheng Xiaozhe, et al. Effect of raw material ratio on spark plasma sintering of molybdenum carbide[J]. Powder Metallurgy Technology, 2018, 36(1): 31-35.
[26]Herrera C, Ponge D, Raabe D. Design of a novel Mn-based 1 GPa duplex stainless TRIP steel with 60% ductility by a reduction of austenite stability[J]. Acta Materialia, 2011, 59(11): 4653-4664.
[27]方鸿生, 郑燕康, 周欣. 中碳贝氏体/马氏体复相组织强韧性的研究[J]. 材料热处理学报, 1986, 7(1): 10-18.
Fang Hongsheng, Zheng Yankang, Zhou Xin. The strength and toughness of the air-cooled microstructure of medium carbon bainite/martensite dual phase[J]. Transactions of Materials and Heat Treatment, 1986, 7(1): 10-18.