316L不锈钢表面微织构激光加工工艺参数

Technological Parameters of Laser Machining of 316L Stainless Steel Surface Micro-texture

结合微织构对摩擦表面的减摩思想,基于套管电极的性能和材料,采用激光加工技术及正交实验法优化了纳秒激光对316L医用不锈钢材料的加工工艺参数。将激光加工后的直线型沟槽的宽度和深度作为正交实验的2个指标,激光功率P、重复频率f、扫描速度v及扫描次数n作为正交实验的4种因素。实验结果表明:对于沟槽宽度,激光加工因素顺序为n>P>f>v,最优激光加工工艺参数的组合为P(0.10 W)、f(80 kHz)、v(400 mm/s)、n(5);对于沟槽深度,激光加工因素顺序为n>v>f>P,最优的激光加工工艺参数的组合为P(0.04 W)、f(75 kHz)、v(400 mm/s)、n(5);结合沟槽宽度、深度及表面灼烧效应的综合影响结果,316L不锈钢表面直线型微织构激光加工最优工艺参数组合为P(0.04 W)、f(75 kHz)、v(400 mm/s)、n(2)。

Processing parameters of the nanosecond laser for 316L stainless-steel are optimized by laser processing technology and orthogonal experiments under the guide of antifriction effect of micro-texture on friction surface and based on the properties and materials of sleeve electrode.The width and depth of straight groove by laser processing are adopted as the two indexes of orthogonal experiments.Power(P),frequency(f),scanning speed(v)and scanning times(n)act as the four factors of orthogonal experiments.The test results show that,for the width of straight groove,the influence rank of laser processing factor is n>P>f>v,and the optimal combination of laser processing parameters is P(0.10 W),f(80 kHz),v(400 mm/s),n(5).Similarly,for the depth of straight groove,the influence rank of laser processing factor is n>v>f>P,and the optimal combination of laser processing parameters is P(0.04 W),f(75 kHz),v(400 mm/s),n(5).With comprehensive results of the width,depth and thermal-affected zones into consideration,the optimal combination of laser processing parameters for micro-texture on 316L stainless-steel is P(0.04 W),f(75 kHz),v(400 mm/s),n(2).