| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface layer forming a cylinder barrel surface, a thermal spray powder suited for a cylinder barrel surface, and a method for forming a cylinder barrel surface. SOLUTION: The surface layer for forming the cylinder barrel wall of a combustion engine block is proposed. The surface layer has a separated phase component separated from the phase of a residual substance. The surface layer is formed by plasma-spraying an iron-containing thermal spray powder in which all the components of the layer to be formed are incorporated. The surface layer markedly improves machinability because it can be simply applied without detriment to the important properties as a layer forming material such as abrasion resistance and frictional coefficient in the case when it is applied to a piston ring. Desirable components of the thermal spray powder includes in addition to iron, chromium, manganese, sulfur and carbon. Further, the powder may include arsenic, tellurium, selenium, antimony and/or bismuth. COPYRIGHT: (C)2006,JPO&NCIPI |
