【摘要】 本文利用大功率CO₂激光器对机床滑动导轨表面进行激光相变硬化处理和研究分析;并通过耐磨性试验研究,获得了相应的磨损曲线和寿命指标。同时,本文对这种表面新技术的实际应用进行了工业试验分析。更多还原

【Abstract】 Theoretical and experimental investigations on surface hardening treatment by laser for the machine tool guides and improvement of the wear resistance are reported. The processes suitable for laser phase transformation hardening treatment of grey cast iron(HT20- 40) guides are proposed. Test results show that laser-hardened surface layers with unchanged original profile can be obtained. The depth of hardened layer is found to be 0.30-0.50 mm, and the average surface microhardness over HV600. The metallographical microstructure of the laser-hardened guide surface is shown to be dentritic martensite with thin flake graphite. The results of the research on the surface wear resistance show that it is nearly much better than that of untreated guides.更多还原