The development of the internal combustion engine is the direction of miniaturization and high power demands higher reli-ability.For high power internal combustion engines,abnormal wear of powder metallurgy valve guides is common in the development process.The problem of insufficient power,emission deterioration and even engine cylinder pulling caused by abnormal wear of valve guide becomes more prominent.In order to solve this problem,die-cast copper-zinc alloy materials are gradually beginning to be used in higher power engine valve guides.Combined with the working conditions of internal combustion engine,a single product test method for the study of wear resistance of valve guide materials is put forward,and the wear mechanism between powder metallurgy and copper alloy is studied in depth with this method.It is proved that the wear resistance of copper alloy valve guide is better than that of powder metallurgy valve guide with adhesive wear and abrasive wear,and the wear resistance stability of copper alloy is higher than that of pow-der metallurgy.
维普
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