Verfahren zur Herstellung einer Unterlegscheibe mit einer Verdickung

摘要

A method for producing a washer having a boss comprises the following steps in the sequence set forth: (a) sprinkling powder of a bearing alloy onto a backing metal made of an iron-based alloy to form a composite material; (b) sintering the composite material to obtain a bimetal material so as to accomplish a primary sintering; (c) fabricating the bimetal material into a shape of the washer having the boss; and (d) simultaneously accomplishing a secondary sintering and carburizing of the washer having the boss. By virtue of simultaneously conducting the secondary sintering and the carburizing for the washer, the number of steps in producing method (particularly, during a heat treatment) is reduced thereby improving the productivity of the washer having the boss while reducing thermal energy required for the heat treatment.