熔覆产生的蓝紫光与熔覆表面质量关系的研究  

Effect of blue-violet light on quality of cladding surfaces

作　　者：马保亮[1] 洪蕾[1] 

机构地区：[1]上海海事大学物流工程学院,上海200135

出　　处：《激光技术》2010年第6期832-834,838,共4页Laser Technology

基　　金：上海市自然科学基金资助项目(09ZR1421300);上海市曙光计划资助项目(09SG47);上海市教委科研创新重点资助项目(10ZZ99);上海市教委重点学科资助项目(J50604)

摘　　要：为了揭示熔覆时产生的蓝紫光信号与熔覆表面质量的关系,采用UV-420对熔覆产生的蓝紫光信号强度进行实时检测,取得了不同扫描速率与激光功率条件下,蓝紫光信号的强度值。经实验研究与理论分析可得,蓝紫光强度相对稳定在1.7μW/cm^2～2.5μW/cm^2时,熔覆表面质量相对比较好;同时证明了熔覆时的等离子体主要来源于熔覆粉末的气化击穿。结果表明,蓝紫光信号强度的大小,在一定程度上能够反映熔覆表面质量的好坏,且能够为熔覆的闭环反馈控制提供具有参考价值的相关参量。In order to reveal the relationship between blue-violet light signal and the surface quality in cladding process, the blue-violet light signal intensity was measured in real time with a UV-420 device. The blue-violet intensity was obtained at different scanning speeds and laser power. Experimental and analytical results show that the surface quality is good when blue- violet intensity is relatively stabled at 1.7μW/cm^2 - 2. 5μW/cm^2. And the plasma is mainly caused by the breakdown of powder＇ s vaporizalion. The blue-violet intensity can reflect the surfaee quality, and it can also provide parameters for closed-loop feedback control.

关 键 词：激光技术 蓝紫光强度 等离子体 熔覆表面质量 

分 类 号：TN249[电子电信—物理电子学] TG156.99[金属学及工艺—热处理]