| 12CrNi3钢外锁止套局部表面激光淬火工艺 |
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| 引用本文： | 李玲,孟璇,赵志鹏,岳佳宏,祁婷.12CrNi3钢外锁止套局部表面激光淬火工艺[J].金属热处理,2020,45(6):72-76. |
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| 作者姓名： | 李玲 孟璇 赵志鹏 岳佳宏 祁婷 |
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| 作者单位： | 山西航天清华装备有限责任公司, 山西 长治 046012 |
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| 摘 要： | 利用半导体激光宽带对12CrNi3外锁止套局部进行表面淬火处理,并对处理后的零件进行外观检验、显微组织观察、硬度检测分析和摩擦磨损试验。试验结果表明:采取定光斑方式,激光头到工件表面扫描区域中心点距离375 mm(离焦量为0),工件倾斜22°,激光头倾斜18°,温度1350 ℃,扫描速度9 mm/s,单道扫描后表面平整性最好。表面激光淬火硬化层为750～1000 μm,最浅处为443.1 μm,硬化区组织为极细小马氏体组织,硬度达600～700 HV0.2,是基体硬度的2倍左右, 约为渗碳+淬火态硬度的1.3倍,且相变硬化区耐磨性能明显提高。
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| 关 键 词： | 外锁止套 激光表面淬火 显微组织 耐磨性能 |
| 收稿时间： | 2019-12-01 |
Local surface laser quenching process of 12CrNi3 steel outside locking sleeve |
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| Li Ling,Meng Xuan,Zhao Zhipeng,Yue Jiahong,Qi Ting.Local surface laser quenching process of 12CrNi3 steel outside locking sleeve[J].Heat Treatment of Metals,2020,45(6):72-76. |
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| Authors: | Li Ling Meng Xuan Zhao Zhipeng Yue Jiahong Qi Ting |
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| Affiliation: | Shanxi Aerospace Qinghua Equipment Co., Ltd., Changzhi Shanxi 046012, China |
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| Abstract: | The surface quenching test was operated on the 12CrNi3 outside locking sleeve by using semiconductor laser broadband, the microstructure, hardness and wear resistance of parts after treatment were detected and analyzed. The results show that the surface flatness is best after single pass scanning by the method of fixed spot, with the distance from the laser head to the center of the scanning area of workpiece 375 mm, the workpiece tilt 22°, the laser head tilt 18°, temperature 1350 ℃ and scanning speed 9 mm/s. The laser surface hardening with 750-1000 μm, but the shallowest is 443.1 μm. The structure of the hardening zone is fine martensite, hardness is up to 600-700 HV0.2, which is the 2 times of the matrix and about 1.3 times of the specimens after carburizing and quenching, and the wear resistance of the laser transformation hardening zone is obviously enhanced. |
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| Keywords: | outside locking sleeve laser surface hardening microstructure wear resistance |
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