一、前言柴油机气缸套在热负荷和机械负荷的综合作用下工作,工作条件苛刻,必须具有足够的强度。对气缸套而言还应具有良好的跑合性能和耐磨性[1] ,要求冷却均匀并保持圆形。湿式气缸套(或缸衬)一般均能很好地满足这些要求。这种气缸套已在所有的中速柴油机和部分高速柴油机上使用。气缸套的损坏或开裂常发生在凸缘区域,呈周向裂纹或沿气缸套向下扩展呈轴向裂纹。 I. Introduction Diesel engine cylinder liner in the heat load and mechanical load under the combined effect of work harsh working conditions, must have sufficient strength. The cylinder liner should also have good run-in performance and wear resistance [1], requiring uniform cooling and keep the circle. Wet cylinder liners (or liners) generally meet these requirements very well. This cylinder liner has been used on all medium-speed diesel engines and some high-speed diesel engines. Cylinder liner damage or cracking often occurs in the flange area, was a circumferential crack or down along the cylinder liner was axial cracks.