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| 耐蚀氮化N63钢高温热变形行为研究 |
| Research on Hot Deformation Behavior of Corrosion Resistant Nitrided N63 Steel |
| Received:November 11, 2024 |
| DOI：10.3969/j.issn.1674-6457.2025.02.009 |
| 中文关键词: N63钢 摩擦修正 本构方程 高温热变形 微观组织 |
| 英文关键词: N63 steel friction correction constitutive equation hot deformation behavior microscopic structure |
| 基金项目:黑龙江省“揭榜挂帅”科技攻关(2023ZXJ04A02) |
| Author Name | Affiliation | | LI Xinyang | Institute of Special Steels, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China | | HAN Shun | Institute of Special Steels, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China | | YANG Hao | Chongqing Science and Technology Innovation Center of Northwest Polytechnic University, Chongqing 401120, China | | WANG Chunxu | Institute of Special Steels, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China | | LI Yong | Institute of Special Steels, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China | | LI Liuyuan | Department of Basic Technology Research, AECC Hunan Aviation Powerplant Research Institute, Hunan Zhuzhou 412002, China |
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| 中文摘要: |
| 目的 研究航空用耐蚀氮化N63钢的高温热变形行为，获得优化的热变形工艺参数。方法 对二次硬化型N63氮化钢进行了高温热压缩变形试验，探究了N63钢在不同变形温度950~1 200 ℃、不同应变速率0.01~10 s−1条件下的高温热塑性行为和组织演变情况。结果 N63钢在热压缩变形过程中，其真应力-应变曲线出现摩擦上翘失真现象;因此，对其真应力-应变曲线进行了摩擦修正，修正后的真应力-应变曲线符合高温流变曲线特征。构建了N63钢流变应力本构方程，获得N63钢的热变形激活能为411 kJ/mol，并绘制出N63钢的热加工图。结论 通过对N63钢热变形方程、热加工图以及不同热变形条件下微观变形组织进行研究，确定N63钢最佳热加工参数如下:变形温度为1 125~1 170 ℃，变形速率为0.60~1.64 s−1。 |
| 英文摘要: |
| The work aims to study the deformation behavior of nitrided N63 steel at high temperature, and obtain optimized hot deformation process parameters. High temperature hot compression deformation tests were conducted on nitrided N63 steel with secondary hardening. The hot deformation behavior and microstructure evolution of N63 steel under the condition of deformation temperature 950-1 200 ℃ and strain rate 0.01-10 s−1 were studied. The results showed that the true stress-true strain curve of N63 steel was distorted by friction during hot compression deformation. Therefore, the true stress-strain curve was modified by friction. The modified true stress-true strain curve accorded with the characteristics of the high temperature rheological curve. On this basis, the constitutive equation of strain compensated flow stress of experimental steel was constructed, and the hot deformation activation energy of N63 steel was obtained as 411 kJ/mol. The hot working diagram map of N63 steel was also drawn. Through the study on the hot deformation equation, hot working diagram, and microstructure of N63 steel under different deformation modes, the optimum hot working parameters of N63 steel are determined as follows:deformation temperature 1 125-1 170 ℃, deformation rate 0.60-1.64 s−1. |
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