热处理工艺对Cr12MoV钢组织及硬度的影响

杜思敏; 李雄; 林发驹

doi:10.7513/j.issn.1004-7638.2021.03.023

热处理工艺对Cr12MoV钢组织及硬度的影响

doi: 10.7513/j.issn.1004-7638.2021.03.023

杜思敏^{1, 2,},
李雄^{1, 2},
林发驹^{1, 2}

1.
成都先进金属材料产业技术研究院股份有限公司，四川成都 610300
2.
海洋装备用金属材料及其应用国家重点实验室，辽宁鞍山 114009

详细信息

作者简介:
杜思敏(1986—)，女，云南彝良人，工程师，本科，主要从事特殊钢的热加工及热处理工艺研究， E-mail：2926747855@qq.com。

中图分类号: TF76，TG161
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出版历程
- 收稿日期: 2021-03-24
- 刊出日期: 2021-06-10

Effect of heat treatment process on microstructure and hardness of Cr12MoV steel

Du Simin^{1, 2
,},
Li Xiong^{1, 2},
Lin Faju^{1, 2}

1.
Chengdu Advanced Metal Materials Industry Technology Research Institute Co., Ltd., Chengdu 610300, Sichuan, China
2.
State Key Laboratory of Marine Equipment Made of Metal Material and Application, Anshan 114009, Liaoning, China

摘要

摘要: 采用金相显微镜、XRD射线衍射仪及维氏硬度计等，研究了普通热处理和深冷处理工艺对Cr12MoV钢显微组织及硬度的影响。结果表明：Cr12MoV钢经普通热处理和深冷处理淬火后的组织均为隐针马氏体+残余奥氏体+碳化物，200 ℃低温回火后组织转变为回火马氏体+碳化物+残余奥氏体。深冷处理可大幅减少钢中残余奥氏体，提升钢的硬度；热处理采用1020 ℃加热保温60 min淬火+（−196 ℃）深冷2 h+200 ℃回火保温120 min，硬度（HV30）值最高，可达780。
- Cr12MoV钢 /
- 热处理 /
- 深冷 /
- 组织 /
- 硬度
Abstract: In this paper the effect of ordinary heat treatment and cryogenic treatment on the microstructure and hardness of Cr12MoV steel had been investigated by microstructure observation using a metallographic microscope, the retained austenite determination by XRD, and the hardness measurement . The results show that the microstructure of Cr12MoV steel after ordinary heat treatment and cryogenic treatment are crypto needle martensite and retained austenite and carbide, and the microstructure changes into tempered martensite and carbide and retained austenite after low temperature tempering at 200 ℃. Cryogenic treatment can greatly reduce the retained austenite in the steel and improve the hardness. The highest hardness is 780 HV30 when steel are quenched at 1020 ℃ and held for 60 min at −196 ℃ for 2 h and tempered at 200 ℃ for 120 min.
- Cr12MoV steel /
- heat treatment /
- cryogenic treatment /
- microstructure /
- hardness

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图 1 试验钢不同热处理工艺淬火及深冷组织

Figure 1. Quenching and cryogenic microstructure of tested steel after different heat treatment processes

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图 2 试验钢不同热处理工艺对残余奥氏体含量的影响

Figure 2. Effect of different heat treatment processes on retained austenite of test steel

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图 3 试验钢不同热处理工艺回火组织

Figure 3. Microstructure of temperedt steel with different heat treatment processes

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图 4 试验钢不同奥氏体化温度与硬度的关系

Figure 4. Relationship between austenitic temperature and hardness of test steel by different heat treatment processes

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图 5 试验钢不同奥氏体化保温时间与硬度的关系

Figure 5. Relationship between austenitic holding time and hardness of test steel by different heat treatment processes

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图 6 试验钢不同深冷处理时间与硬度的关系

Figure 6. Relationship between hardness and cryogenic time of test steel by different heat treatment processes

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表 1 Cr12MoV钢的主要化学成分

Table 1. Main chemical compositions of Cr12MoV steel %

C	Si	Mn	P	S	Cr	Mo	V
1.46	0.25	0.33	0.025	0.001	11.67	0.41	0.2

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表 2 Cr12MoV钢的热处理工艺

Table 2. Heat treatment processes of Cr12MoV steel

试样号	奥氏体化温度/℃	保温时间/min	深冷时间/h	回火温度/℃	回火保温时间/min	备注
1	950	30		200	120
2	980	30		200	120
3	1000	30		200	120
4	1020	30		200	120
5	1020	60		200	120
6	1020	120		200	120
7	1050	30		200	120
1-2	950	30	2	200	120	深冷处理
2-2	980	30	2	200	120	深冷处理
3-2	1000	30	2	200	120	深冷处理
4-2	1020	30	2	200	120	深冷处理
5-2	1020	60	2	200	120	深冷处理
5-4	1020	60	4	200	120	深冷处理
5-8	1020	60	8	200	120	深冷处理
6-2	1020	120	2	200	120	深冷处理
7-2	1050	30	2	200	120	深冷处理
注：淬火冷却方式均为油冷，深冷处理均为（−196 ℃）液氮浸泡冷却。

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参考文献(10)

[1]	Yan Lijing, Feng Jing, Zhang Yanhua, et al. Effect of heat treatment process on microstructure and mechanical properties of Cr12MoV cold extrusion die steel[J]. Hot Working Technology, 2017,46(2):205−207. (闫丽静, 冯婧, 张艳华, 等. 热处理工艺对Cr12MoV冷挤压模具钢组织和力学性能的影响[J]. 热加工工艺, 2017,46(2):205−207.
[2]	Yang Weiwei, Song Guangli, Xu Lei. Effects of cryogenic treatment on properties of triangle cam made of Cr12MoV steel[J]. New Technology & New Process, 2014,(12):62−64. (杨伟伟, 宋广礼, 徐磊. 深冷处理对三角材质Cr12MoV钢性能的影响[J]. 新技术新工艺, 2014,(12):62−64. doi: 10.3969/j.issn.1003-5311.2014.12.021
[3]	Zou Jilin. Application of surface strengthening technology in die cavity[J]. Die & Mould Industry, 2001,(5):44−47. (邹济林. 表面强化技术在模具型腔的应用[J]. 模具工业, 2001,(5):44−47. doi: 10.3969/j.issn.1001-2168.2001.05.018
[4]	Zhou Jin’en. Selection and heat treatment of die materials and service life of dies[J]. Heat Treatment of Metals, 1999,(5):129. (周敬恩. 模具材料选用、热处理与使用寿命[J]. 金属热处理, 1999,(5):129.
[5]	Yang Xuesong. Review of medium low alloy wear resistant steel[J]. Science and Technology Innovation Herald, 2007,18(3):34−71. (杨雪松. 中低合金耐磨钢综述[J]. 科技创新导报, 2007,18(3):34−71. doi: 10.3969/j.issn.1674-098X.2007.03.027
[6]	（段春争. 高速钢深冷处理工艺及机理研究[D]. 兰州: 甘肃工业大学, 2000.） Duan Chunzheng. Study on cryogenic treatment process and mechanism of high speed steel[D]. Lanzhou: Gansu Polytechnical University, 2000.
[7]	Mohanlal D, Renganarayanan S, Kalanidhi A. Cryogenictreatment to augment wear resistance of tool and die steels[J]. Cryogenics, 2001,41:149−155. doi: 10.1016/S0011-2275(01)00065-0
[8]	Li S H, Min N, Deng L H, et al. Influence of deep cryogenic treatment on internal friction behavior in the process of tempering[J]. Materials Science and Engineering, 2011,528:1247−1250. doi: 10.1016/j.msea.2010.10.012
[9]	Lv Yanwen, Yan Xianguo, Han Xiaojun, et al. Effect of cryogenic treatment on hardness and microstructure of W6Mo5Cr4V2 high speed steel[J]. Hot Working Technology, 2015,44(8):174. (吕雁文, 闫献国, 韩晓君, 等. 深冷处理对W6Mo5Cr4V2高速钢硬度及组织的影响[J]. 热加工工艺, 2015,44(8):174.
[10]	Chi Hongxiao, Ma Dangshen, Wang Chang, et al. Study on secondary hardening mechanism of Cr8Mo2SiV steel[J]. Acta Metallurgica Sinica, 2010,46(10):1181. (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.