It is difficult to control heat treatment deformation of thin-wall parts in automatic transmission 4T65E in Buick Car by a routine controllable atmosphere carburizing following with oil quenching.

• 按常规可控气氛渗碳油淬工艺对别克轿车4T65E自动变速器中的薄壁零件进行热处理,零件的变形很难控制。