对普通灰口铸铁和含磷、钼、铬等合金铸铁制作的中小型内燃机汽缸与活塞环摩擦副材料进行了激光相变硬化工艺处理与匹配优化。成组配对后的滴油摩擦磨损试验表明, 经激光相变硬化后的气环与汽缸的最佳匹配为磷铬钼合金铸铁气缸与铬钼铜合金铸铁活塞环的匹配,比不经激光处理的相同的摩擦副磨损速率明显降低。

The pairs of cylinder and piston ring of internal combustion engine made by gray cast and alloyed cast respectively by laser quenching were optimized. Wear experiments with enough lubricates showed that the best pair of laser hardening cylinder and piston ring is cylinder alloyed with phosphor. Chromium and molybdenum with piston ring alloyed with Chromium, molybdenum and copper which has much lower wear velocity than that without laser hardening.