| 热处理温度对Cr-Ni-Mo-V钢组织和力学性能的影响 |
| 其他题名 | Effect of heat treatment temperature on microstructure and mechanical properties of Cr-Ni-Mo-V steel
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| 张守清; 胡小锋; 姜海昌; 闫德胜; 戎利建
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| 2018
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| 发表期刊 | 金属热处理
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| ISSN | 0254-6051
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| 卷号 | 43.0期号:003页码:177-184 |
| 摘要 | 利用OM、SEM和TEM等研究了热处理温度（正火温度、淬火温度和回火温度）对Cr-Ni-Mo-V钢微观组织和力学性能的影响。结果表明：在840~920℃的正火温度和淬火温度范围内,合金钢的原奥晶粒尺寸变化不大（8~17μm）,对最终回火态合金钢的力学性能影响较小。随着回火温度（460~660℃）的升高,基体α-Fe的板条宽度从460℃的50 nm逐渐增加到610℃的500 nm,直至660℃板条特征不明显;与此同时,基体α-Fe逐渐分解析出较粗大（500~1000 nm）的条状碳化物,使得Cr-Ni-Mo-V钢的强度逐渐降低,而在510~560℃析出了细小弥散的针状碳化物（50~500 nm）和球状碳化物（〈50 nm）,引起了二次硬化,使得合金钢的强度反而略有增加。此外,合金钢的伸长率逐渐升高,-50℃冲击吸收能量从560℃开始明显提高。采用840~920℃正火＋840~920℃淬火＋510~610℃回火处理工艺可使Cr-Ni-Mo-V钢获得较好的综合力学性能。 |
| 其他摘要 | Effect of heat treatment temperatures（ normalizing temperature,quenching temperature and tempering temperature） on the microstructure and mechanical properties of a Cr-Ni-Mo-V steel was investigated by means of OM,SEM and TEM. The results show that the prior austenite grain size of the tested steel changes little（ 8-17 μm） when the normalizing and quenching temperatures are in the range of840-920 ℃,which has little effect on the mechanical properties of the final tempered steel. When the tempering temperature increases in the range of 460-660 ℃,the lath width of α-Fe increases from 50 nm at 460 ℃ to 500 nm at 610 ℃,and the laths become obscure at 660 ℃.Meanwhile,the matrix α-Fe decomposes gradually and precipitates out relatively bulky strip-like carbides,which makes the strength of CrNi-Mo-V steel to reduce gradually. When tempered in the range of 510-560 ℃,however,the strength of the steel increases slightly due to secondary hardening caused by precipitation of fine dispersive acicular carbides（ 50-500 nm） and spherical carbides（ 50 nm）. In addition,the elongation increases,and the impact absorbed energy at-50 ℃ improves obviously since 560 ℃. Therefore,the tested Cr-NiMo-V steel can obtain preferred comprehensive mechanical properties by adopting a heat treatment process of 840-920 ℃ normalizing＋840-920 ℃ quenching＋510-610 ℃ tempering. |
| 关键词 | Cr-Ni-Mo-V钢
热处理温度
原奥氏体晶粒尺寸
碳化物
力学性能
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| 收录类别 | CSCD
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| 语种 | 中文
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| CSCD记录号 | CSCD:6220252
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.imr.ac.cn/handle/321006/158175
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| 专题 | 中国科学院金属研究所
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| 作者单位 | 中国科学院金属研究所
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推荐引用方式
GB/T 7714 |
张守清,胡小锋,姜海昌,等. 热处理温度对Cr-Ni-Mo-V钢组织和力学性能的影响[J]. 金属热处理,2018,43.0(003):177-184.
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| APA |
张守清,胡小锋,姜海昌,闫德胜,&戎利建.(2018).热处理温度对Cr-Ni-Mo-V钢组织和力学性能的影响.金属热处理,43.0(003),177-184.
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| MLA |
张守清,et al."热处理温度对Cr-Ni-Mo-V钢组织和力学性能的影响".金属热处理 43.0.003(2018):177-184.
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