感应加热·颗粒离心熔铸工艺制备钢背铜铅合金滑动轴承的研究

铜基合金及铝基合金滑动轴承虽然具有优良的耐摩擦磨损性能及较大的疲劳强度,但其抗胶合性能和嵌藏性一般.为了满足高速重载柴油机滑动轴承性能的要求,采用感应加热·颗粒离心熔铸工艺制备的钢背铜铅合金双金属滑动轴承突破了合金材料性能上的限制,同时具备了较好的疲劳强度、顺应性、嵌藏性、耐腐蚀性能和抗胶合性能.实际应用效果表明,该工艺所制产品的机械性能、双金属间的粘接强度以及疲劳强度均较高,且质量可靠、合金利用率高,组织及性能优于目前其他工艺所制滑动轴承.

Research of Induction Heating and Particle Centrifugal Melting Technique for Steel-backed Copper Lead Alloy Sliding Bearing

Despite their excellent friction and wear resistance and considerable fatigue strength, copperbase alloy and aluminum-base alloy sliding bearings are not so attractive due to their insufficient anti-seizure and oil retaining capabilities. In order to satisfy the technical specifications of sliding bearings for diesel engines on high speed and heavy-haul locomotives, steel-backed copper-lead alloy bimetal sliding bearing is produced with induction heating and particle centrifugal melting processes, which is characterized not only by its breakthrough of the limit to properties of alloyed materials, but also by its fine fatigue strength, compliance, oil retaining, corrosion resistance and anti-seizure performance. Practical application proves that the mechanical properties, bimetal bonding strength, fatigue strength, reliability, alloy utilization rate and microstructure of the sliding bearing manufactured with this new process are better than that produced with other techniques.