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| 摘要: |
| 运用激光表面强化的理论和技术,对70Mn2Mo铸钢热轧辊进行固态相变硬化处理后得到细化的马氏体组织,硬度由原始组织的200—300HV提高到920HV(约相当于HRC65),硬化层深度达0．6mm,经高温回火后,硬度及淬硬层仍分别保持在430HV和0．4mm以上,表明具有良好的抗回火性能。与水淬处理比较,激光相变硬化的硬度及抗回火性能均优于水淬处理,显示出良好的应用前景。 |
| 关键词: 铸钢,热轧辊,激光,强化 |
| DOI： |
| 分类号:TG174.4 |
| 基金项目: |
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| The Study of Laser Strengthened 70Mn2Mo Cast Steel Hot Roll |
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Li Deyu Xu Qiaoyu Shang Zhensheng Surface Technology Institute,AEUBTang Xinan Zhou Changzhi Department of Materials,Qinghua University
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| Abstract: |
| Abstract Fine martensite structure is gained in 70Mn2Mo cast roll after solidification by laser treatment. The hardness and depth of harder zone were reached at 920HV (about HRC 65)and 0. 6 mm which were maintained above 430HV and 0. 4mm, respectively These result show the better anti-tempering, property and the higher hardness and harden depth compared laser strengthening with water-quenching , and imply the greater applied potentiality of laser strengthening. |
| Key words: Cast Steel Hot Roll Laser Strengthening, |