| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a resin molding die excellent in mirror surface property, which is composed of Ni-Al-Cu based age hardening die steel and used for molding a large resin product. <P>SOLUTION: The method for manufacturing the resin molding die, includes: a bloom forging process in which a steel ingot is heated to a temperature T<SB>1</SB>and then, is bloom-forged into a billet; and a soaking process in which the billet is heated to a temperature T<SB>2</SB>and held, and a low-temperature finish forging process for performing forging after heating the billet to a temperature T<SB>3</SB>of≤1,050°C, after the bloom forging process. Here, between the soaking process and the low-temperature finish forging process, a hot-gouging process in which the gouging is performed at a temperature T<SB>4</SB>of≥500°C which is at least lower than the temperature T<SB>3</SB>, is further included. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
