【摘要】 通过合金化原则与使用性能相结合的试验分析方法，研制出等离子弧喷焊工艺性优良、在７５０℃温度下长时间工作，耐热、耐磨和耐烧蚀性能高的Ｃｏ－２２３Ａ合金粉末，熔敷金属稀释度低、室温硬度ＨＲＣ≈４０、抗裂纹性高，用于高速柴油发动机排气阀密封面的喷焊，气阀使用寿命提高４～６倍。更多还原

【Abstract】 With an experimental analyzing method,which combined the alloying principle with application feature,a Co-223A alloy powder has been developed for plasma arc spray-welding.The plasma arc spray-weld metal can opeate at 750℃ for a long time and has high resistance to heat,wear and erosion. Its deposited metal has a low rate of dilution, about HRC 40 hardness at roon temperature and a high cracking resistance.While it is apray-welded to the seal surface of exhaust valves in high speed disel engines,the service life of the exhaust valve can be increased by 4 to 6 times.更多还原