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, |