| 摘要 |
<p>Provided is a method for manufacturing a thrust bearing which actually can be used suitably in a turbocharger. This method has: a step wherein a first metal powder (17) is compression-molded into a tubular shape, thereby obtaining a compressed powder core material (18); a step wherein the compressed powder core material (18) and a second metal powder (27) different from the first metal powder (17) are supplied to the interior of a die (12); and a molding step wherein the second metal powder (27), is compression molded together with the compressed powder core material (18) within the die (12) by means of an upper punch (14) and a lower punch (15). The molding step is a step wherein protrusions formed on the upper punch (14) form an irregular shape which corresponds to the protrusions, said irregular shape being formed simultaneously with respect to the compressed powder core material (18) and the second metal powder (27), thereby forming a compressed powder compact (28) in which the compressed powder core material (18) and the second metal powder (27) are joined together. In addition, there is a sintering step wherein the compressed powder compact is heated and sintered, and a high-sliding part, which is the portion corresponding to the compressed powder core material (18) after the sintering step, has a better sliding property and abrasion resistance than an outer circumferential part, which is the portion corresponding to the second metal powder (27) after the sintering step.</p> |
