我校实习厂承揽加工的热处理件薄壁缸套 (δ=5.5mm、δ=7mm)是石油钻机用泥浆泵的关键件。在泥浆泵工作中 ,缸套受高速流动泥浆中沙粒的磨损和腐蚀性介质的侵蚀 ,易出现拉伤、沟纹、剥落、渗漏、脱缸及破碎 [1] 等失效现象。为提高缸套使用寿命 ,生产厂在内外套上采用双金属结 The thin-walled cylinder liner (δ = 5.5mm, δ = 7mm) of the heat treatment unit under contract processing of our school is the key component of the mud pump for petroleum rig. In the mud pump work, the cylinder liner is affected by the abrasion of the sand grains in the high-speed flowing mud and erosion by the corrosive medium, and the failure phenomena such as strain, groove, spalling, leakage, stripping and crushing [1] are easy to occur. In order to improve the service life of the cylinder liner, the production plant adopts double metal knots on the inner and outer sleeves