作者采用高功率连续CO_2激光束处理柴油机缸套外壁,使其表面形成一层极细的淬火马氏体或莱氏体组织。快速穴蚀试验和柴油机装机考核试验均表明,缸套外壁生成的淬火马氏体和莱氏体组织具有较好的抗穴蚀阻抗,它与材料的硬度及材料组织的晶粒尺寸等因素有关。
To treat by CW CO_2 laser on the outer wall of 180 diesel cylinder, afine structure layer of quenched martensite or ledeburite may be formed. This layertested better in resistance to cavitatiin erosion during examination of either accele-rated cavitation erosion or diesel engine assembly. Experimental results show thatthe improvement on the resistance is dependent on the hardness change over the walland the grain size of steel structure.
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