Solid solution treatment for improving cryogenic temperature toughness of Cr-Ni-Mo-Ti maraging stainless steel

doi:10.13251/j.issn.0254-6051.2022.01.008

Abstract

Abstract: Microstructure, room temperature strength and cryogenic temperature toughness of 12Cr-10Ni-Mo-Ti maraging stainless steel after solution treatment at 1000 ℃, repeated low temperature solution treatment at 750 ℃ and aging at different temperature were investigated. The amount of retained austenite/reverse transformation austenite under different solution and aging treatment conditions were analyzed by using XRD. The precipitation and aging strengthening rules of reverse transformation austenite in different solution treatment processes were compared and analyzed. The results show that the Cr-Ni-Mo-Ti maraging stainless steel after solution treatment at 1000 ℃ and followed low temperature solution treatment at 750 ℃ forms austenite by α′→γ shear reverse transformation, which not only inherits the grain morphology and size of austenite, but also increases the martensitic transformation resistance and significantly reduces the formation temperature of reverse transformation austenite due to the high density of defects in austenite, resulting in 16.4% retained austenite after double solid solution treatment at 750 ℃, more than 30% retained austenite/reverse transformation austenite is formed after peak value aging at 460 ℃, and the impact absorbed energy at cryogenic temperature is extremely high, reaching above 80 J. Moreover, the high density of defect in austenite is inherited into the martensite, which enhances the aging strengthening effect. Therefore, the low temperature impact property is significantly improved without significantly reducing the tensile strength and yield strength.

Key words: maraging stainless steel, solution treatment, retained austenite, reversed austenite, cryogenic temperature toughness

CLC Number:

TG142.1

Qiu Xuyangfan, Yang Zhuoyue, Ding Yali. Solid solution treatment for improving cryogenic temperature toughness of Cr-Ni-Mo-Ti maraging stainless steel[J]. Heat Treatment of Metals, 2022, 47(1): 44-48.

References

[1]Stepanov G A, Stanotina V V. Properties of steel 12Kh18N10T tested for tensile strength in liquid helium cooled to 2. 4 K[J]. Metal Science and Heat Treatment, 2003, 45(9/10): 373-375.
[2]Saucedo-Munoz M L, Watanabe Y, Shoji T, et al. Effect of microstructure evolution on fracture toughness in isothermally aged austenitic stainless steels for cryogenic application[J]. Cryogenics, 2000, 40(11): 693-700.
[3]Tarasenko L V, Shal'Kevich A B. Phase composition and hardening of steels of the Fe-Cr-Ni-Co-Mo system with martensite-austenite structure[J]. Metal Science and Heat Treatment, 2007, 49(3/4): 188-193.
[4]Anoop C R, Prakash A, Murty S V S N, et al. Origin of low temperature toughness in a 12Cr-10Ni martensitic precipitation hardenable stainless steel[J]. Materials Science and Engineering A, 2018, 709(1): 1-8.
[5]Kagan E S, Potak Ya M, Sachkov V V, et al, High-strength steel for cryogenic temperatures[J]. Metal Science and Heat Treatment, 1971, 13(10): 821-822.
[6]Lee S J, Park Y M, Lee Y K. Reverse transformation mechanism of martensite to austenite in a metastable austenitic alloy[J]. Materials Science and Engineering A, 2009, 515(1/2): 32-37.
[7]Vasudevan V K, Kim S J, Wayman C M. Precipitation reactions and strengthening behavior in 18 Wt Pct nickel maraging steels[J]. Metallurgical Transactions A, 1990, 21(10): 2655-2668.
[8]Luo Haiwen, Wang Xiaohui, Liu Zhenbao, et al. Influence of refined hierarchical martensitic microstructures on yield strength and impact toughness of ultra-high strength stainless steel[J]. Journal of Materials Science and Technology, 2020, 51: 130-136.
[9]Li X, Fan Y, Ma X, et al. Influence of martensite-austenite constituents formed at different intercritical temperatures on toughness[J]. Materials and Design, 2015, 67: 457-463.
[10]Carlos García-Mateo, Francisca G Caballero. The role of retained austenite on tensile properties of steels with bainitic microstructures[J]. Materials Transactions, 2005, 46(8): 1839-1846.

[1]	Qi Xiaoliang, Li Yan, Ding Wei, Zhao Zengwu. Effect of original microstructure of medium manganese TRIP steel containing Al on microstructure and mechanical properties after intercritical annealing [J]. Heat Treatment of Metals, 2022, 47(4): 24-29.
[2]	Wang Yinghu, Zheng Huaibei, Liu Tingyao, Song Lingxi, Bai Qingqing. Effect of solid solution treatment on microstructure and carbides of 53Cr21Mn9Ni4N heat-resistant steel [J]. Heat Treatment of Metals, 2022, 47(4): 39-45.
[3]	Wang Ruiqin, Ge Peng, Liao Qiang, Hou Peng, Liu Yu. Effects of solution cooling method on microstructure and properties of short-term servicing high-temperature titanium alloy plate [J]. Heat Treatment of Metals, 2022, 47(4): 196-198.
[4]	Chen Liansheng, Fang Ning, Cao Zhongqian, Yang Zixuan, Li Hongbin, Pan Hongbo, Tian Yaqiang. Effect of intercritical warm-rolling reduction ratio on microstructure and properties of medium manganese steel treated by quenching and partitioning [J]. Heat Treatment of Metals, 2022, 47(3): 28-33.
[5]	Sun Jian, Huang Zhenyi, Li Jinghui, Wang Ping. Effect of solution treatment and aging on microstructure and hardness of Fe-Mn-Al-C light weight steel [J]. Heat Treatment of Metals, 2022, 47(3): 34-38.
[6]	Cheng Tijuan, Gan Bin, Yu Hongyao, Zhou Haijing, Guo Caiyu, Bi Zhongnan, Du Jinhui. Effect of solution treatment on structure and properties of a novel nickel-based superalloy [J]. Heat Treatment of Metals, 2022, 47(3): 107-112.
[7]	Ye Tuo, Tang Ming, Liu Jizhao, Liu Wei, Wu Yuanzhi, Liu Wei, Xu Wen. Effect of solution temperature on microstructure and mechanical properties of 7075 aluminum alloy sheet [J]. Heat Treatment of Metals, 2022, 47(3): 119-123.
[8]	Liu Tao, Wu Hongyan, Gao Xiuhua, Qin Dongyang, Du Linxiu. Effect of intercritical tempering temperature on microstructure and mechanical properties of Fe-4Mn-1.2Cr-0.3Cu-0.6Ni medium manganese steel [J]. Heat Treatment of Metals, 2022, 47(2): 91-98.
[9]	Dong Rui, Chen Lin, Cen Yaodong, Bao Xirong. Microstructure and fatigue crack growth of a bainitic steel under different heat treatments [J]. Heat Treatment of Metals, 2022, 47(2): 153-158.
[10]	Zeng Yu, Wu Wei, Mo Yan. Solution treatment and aging processes for a nickel-saving superalloy for automobile engine valve [J]. Heat Treatment of Metals, 2022, 47(2): 188-192.
[11]	Hou Yaqing, Zhang Yu, Yu Mingguang, Wang Jingjing, Yang Li, Su Hang. Thermodynamic calculation of retained austenite content in Q&P steel [J]. Heat Treatment of Metals, 2022, 47(1): 25-31.
[12]	Gao Yaping, Shi Zhongran, Jia Juan, Luo Xiaobing, Song Xinli. Effect of heat treatment process on microstructure and abrasive wear properties of dredging engineering ship steel [J]. Heat Treatment of Metals, 2022, 47(1): 32-37.
[13]	Wang Man, Shen Qiang, Luo Youxin, Nai Qiliang, Wang Baoshun, Wu Minghua, Zhu Xiongming. Effect of solution temperature and cold deformation on microstructure and low temperature impact properties of S32750 duplex stainless steel tube [J]. Heat Treatment of Metals, 2022, 47(1): 233-238.
[14]	Gong Fangyuan, Feng Hanqiu, Lang Yuping, Chen Haitao, Wang Man, Zhu Xiongming, Leng Chongyan. Effect of nitrogen and heat treatment on microstructure of 028 alloy [J]. Heat Treatment of Metals, 2021, 46(9): 36-41.
[15]	Deng Biao, Chen Peng, Wang Guodong. Effect of tempering temperature on microstructure and properties of secondary hardening martensitic stainless steel [J]. Heat Treatment of Metals, 2021, 46(9): 65-71.