我厂虽从事汽车大修业务多年,在昆明甚至在省内也享有盛誉,但在修理过程中,也碰到一些棘手的问题。其中比较突出的是,进口车原车的发动机缸体(套)很耐磨,行驶里程少则7～8万kin,多则20～30万km;而一经大修后,缸壁极易磨损,最多也只有5～6万km。用户叫苦连天。问题的关键在哪里?缸壁怎样处理才耐磨?带着这些问题,于1994年11～12月, Although I plant for many years engaged in car overhaul business in Kunming, even in the province also enjoys a good reputation, but in the repair process, but also encountered some difficult issues. One of the more prominent is the imported car engine car engine block (sleeve) is very wear-resistant, mileage of at least 7 to 80,000 kin, as many as 20 to 300,000 km; and after overhauling, the cylinder wall is extremely easy to wear, Up to only 5 to 60,000 km. Users cry bitterly. Where is the crux of the problem? How to deal with tank wall wear? With these problems, in November 1994 to December,