英国原子能管理局卡拉姆实验室已研制成一种可望提高内燃机耐久性的激光淬火法,这种工艺是在铸铁活塞镶钢环槽的侧表面作抗磨处理。直到最近,170～400毫米口径的中速发动机才使用环槽强化铝合金铸造活塞。为提高热与机械负 British Nuclear Authority Kalam Laboratory has developed a laser quenching method that is expected to improve the durability of internal combustion engines. The process is anti-wear on the side surfaces of cast iron piston ring grooves. Until recently, intermediate-speed engines of 170 to 400 mm were used with ring-grooved aluminum alloy cast pistons. To increase the heat and mechanical negative