现代内燃机活塞是在繁重的条件下工作的。活塞应该具有高的机械强度,足够的抗疲劳破坏性和高耐磨性,同时其重量应为最轻。采用具有热强钢镶环座的双金属活塞是解决这个问题的方法之一。带镶环座的双金属活塞的铸造工艺是众所周知的。高镍铸铁镶环座在液体锌中加热到420℃,放入金属型内用АЛ25合金压力浇注。这种活塞在功率为3000马力的2Д70发动机上的试验表明,在工作150～ Modern internal combustion engine pistons are working under heavy conditions. The piston should have high mechanical strength, sufficient resistance to fatigue damage and high wear resistance, while its weight should be the lightest. The use of a bimetallic piston with a hot steel seat is one of the solutions to this problem. The casting process of a bimetallic piston with a ring seat is well known. High nickel cast iron ring seat in liquid zinc heated to 420 ℃, into the metal type with АЛ25 alloy pressure casting. The piston in the power of 2 horsepower 3000 horsepower engine on the test showed that in the work of 150 ~