摘要
切取高硅铝合金缸套试样,并对工作面进行激光光整,研究其对摩擦磨损性能的影响。结果表明,激光扫描速度为600 mm/min,离焦量2 mm,功率为1 000 W时硅颗粒最大凸出高度为1.243μm,与未处理试样相比,摩擦因数从0.141降到0.113,降幅达19.9%,磨损量从0.7 mg降到0.2 mg,降幅达71.4%;激光光整使高硅铝合金缸套工作面上的硅颗粒凸出且边角圆化,硅颗粒的凸出,避免了铝基体与活塞环的直接接触,并增大了储油润滑的效果,减少了粘着磨损的风险,也降低了摩擦力,从而改善了高硅铝合金缸套材料的摩擦磨损性能。
The effect of laser finishing on wear behavior of high-silicon aluminum alloy samples, which were cut from a cylinder liner, was studied. The results show that： when the laser scanning speed is 600 mm/min, the laser defocus is 2 mm and the laser beam power is 1 000 W, the maximum protrusion height is 1.243 μm. The results of the wear test show that the friction coefficient can be reduced from about 0.141 to 0.113 （decline of 19.9%）, and the weight loss decreases from about 0.7 mg to 0.2 mg （decline of 71.4%） compared with that of the original samples. Silicon particles are protrude above the surface with rounded edges by laser finishing. The exposed silicon particles prevent aluminum from directly contacting with the piston ring. This improves the lubrication, reduces the adhesion and decreases the friction coefficient. Therefore, the wear behavior of the high-silicon aluminum alloy cylinder liner is improved.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2017年第5期89-94,共6页
China Surface Engineering
基金
中央高校基本科研业务费专项资金(3132017009)
辽宁省自然科学基金(20170540083)
中国博士后科学基金(2017M611209)~~
关键词
激光光整
高硅铝合金缸套
摩擦磨损
硅颗粒
凸出高度
laser finishing
high-silicon aluminum alloy cylinder liner
wear and friction
silicon particles
protrusion height
