| 摘要: |
| 研究了农机用６５Ｍｎ钢激光相变和激光熔凝处理后的显微组织和显微硬度，结果表明：显微组织由表面相变硬化区，过渡区和基体组成，硬化区是超细针状马氏体，显微硬度达ＨＶ９００￣１０００，激光相变多道搭接扫描后在搭接区有明显的回火软化现象。 |
| 关键词: 锰钢 激光表面处理 显微组织 显微硬度 农业机械 |
| DOI： |
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| 基金项目:中国博士后基金 |
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| Microstructures and Properties of 65Mn Steel Under Laser Surface Treatment |
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| Abstract: |
| The microstructure and micro-hardness of 65Mn steel under laser surface treatment,which can be used in agricultural machinery are analyzed. The results show that the microstructure consists of three parts:high hardness quench region from sam-ple surface with super fine martensite, hardness transition region with the mixture of martensite, troostite and pearlite, and low hardness base region with pearlite. Micro-hardness is up to HV900-1000 in high hardness quench region. Temper softening phenomena occur at the contact parts in condition of laser beam repeat scan. |
| Key words: laser surface treatment,microstructure,micro-hardness, |
