苏联某厂发明一种名叫水冷膨胀法的活塞销修理新方法,把扩张活塞销外径和渗碳层淬火两道工序结合进行。即,把12XH3A钢(铬镍合金钢)制的、外表面有滲碳层的已磨损活塞销送入淬火设备的感应器里,加热到1100～1160K,销子的两个端面夹紧在水冷膨胀装置上,销子内的水冷。这样,销子外径可胀大0.1～0.3mm,同时,它的滲碳 A factory in the Soviet Union invented a new method of piston pin repair called water-cooled expansion method, combining the two steps of expanding piston pin diameter and carburizing layer quenching. That is, 12XH3A steel (chrome-nickel alloy steel), the outer surface of the carburized layer of worn piston pin into the quenching equipment, the sensor is heated to 1100 ~ 1160K, both ends of the pin pinch the water-cooled Expansion device, the pin inside the water-cooled. In this way, the pin diameter can be expanded 0.1 ~ 0.3mm, at the same time, it’s carburizing