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本文通过试验证明,镀锡(或锌)中硅球墨铸铁活塞环在加热和应力的双重条件下,锡(或锌)沿铁素体晶界迅速扩散,造成应力腐蚀,从而产生径向和周向的裂纹甚至断裂,因而得出结论:用这种材料棚造的活塞环不能探用表面镀锡(或锌)处理。
The experiment shows that tin (or zinc) diffuses rapidly along the ferrite grain boundaries under the dual conditions of heating and stress in the tinned (or zinc) ductile iron ring, resulting in stress corrosion and thus radial and circumferential To the cracks or even rupture, it concluded that: with this material shed piston ring can not probe surface tin (or zinc) treatment.