| 控锻控冷工艺对GCr15轴承钢组织演变规律的影响 |
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| 引用本文： | 扈林庄,郭浩,雷建中,刘扬,杜三明,张永振.控锻控冷工艺对GCr15轴承钢组织演变规律的影响[J].金属热处理,2020,45(9):134-138. |
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| 作者姓名： | 扈林庄 郭浩 雷建中 刘扬 杜三明 张永振 |
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| 作者单位： | 1.洛阳轴承研究所有限公司,河南 洛阳 471029; 2.机械科学研究总院 武汉材料保护研究所 特种表面保护材料及应用国家重点实验室,湖北 武汉 430030; 3.河南科技大学 高端轴承摩擦学技术与应用国家地方联合工程实验室,河南 洛阳 471023 |
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| 摘 要： | 采用微观组织表征的方法对比研究了GCr15轴承钢在传统工艺和控锻控冷工艺下的组织和网状碳化物分布的演变规律,并统计和分析了不同工艺下的晶粒度和残留奥氏体含量的变化规律。结果表明,GCr15轴承钢经控锻控冷工艺处理后,GCr15钢中粒状珠光体组织相对更细小,淬回火组织基体中的C元素分布更为均匀,同时洛氏硬度提高0.7 HRC;残留奥氏体含量降低;碳化物颗粒尺寸细化,平均颗粒尺寸减小40%以上,同时抑制粗大碳化物网状的形成;可使奥氏体晶粒度细化2级以上。
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| 关 键 词： | GCr15钢 控锻控冷工艺 马氏体 碳化物 晶粒度 |
| 收稿时间： | 2020-05-28 |
Influence of controlled forging and cooling process on microstructure evolution of GCr15 bearing steel |
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| Hu Linzhuang,Guo Hao,Lei Jianzhong,Liu Yang,Du Sanming,Zhang Yongzhen.Influence of controlled forging and cooling process on microstructure evolution of GCr15 bearing steel[J].Heat Treatment of Metals,2020,45(9):134-138. |
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| Authors: | Hu Linzhuang Guo Hao Lei Jianzhong Liu Yang Du Sanming Zhang Yongzhen |
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| Affiliation: | 1. Luoyang Bearing Research Institute Co.,Ltd.,Luoyang Henan 471029,China; 2. State Key Laboratory of Special Surface Protection Materials and Application Technology,Wuhan Research Institute of Materials Protection,China Academy of Machinery Science & Technology,Wuhan Hubei 430030,China; 3. National United Engineering Laboratory for Advanced Bearing Tribology,Henan University of Science and Technology,Luoyang Henan 471023,China |
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| Abstract: | Microstructure evolution and network carbide distribution of GCr15 bearing steel treated by traditional process and controlled forging and cooling process were comparatively studied by using the way of microstructure characterization.And the statistics and analysis about change rules of grain size and retained austenite content under different processes were made.The results show that after treating by controlled forging and cooling process,the microstructure of granular pearlite in GCr15 bearing steel is relatively smaller,the distribution of C element in the matrix after quenching and rolling is more uniform,and the Rockwell hardness is increased by 0.7 HRC.In addition,the retained austenite content of GCr15 bearing steel is decreased,accompanied with the refinement of carbide particle,and the average particle size is decreased by more than 40%,meanwhile,the formation of coarse carbide network is inhibited.In addition,the austenite grain size can be refined to more than 2 grades. |
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| Keywords: | GCr15 bearing steel controlled forging and cooling process martensite carbide grain size |
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