Technical method for preparing cold work die steel in high alloy through jetting deposition

Abstract

This invention discloses a method for preparing high-alloy cold-working die steel by injection deposition. The method comprises: (1) preparing molten high-alloy cold-working die steel; (2) preparing high-alloy cold-working die steel green body by atomization deposition in inert gas when the temperature reaches required overheating degree. The components of molten high-alloy cold-working die steel are: C 1.45-1.55 wt.%, Cr 7.8-8.2 wt.%, V 3.9-4.1 wt.%, Mo 1.4-1.6 wt.%, Si 0.9-1.1 wt.%, Mn 0.3-0.5 wt.%, and Fe. Since atomization deposition is utilized, the obtained green body has tiny and uniform microstructure without macroscopic precipitation. The grain sizes of the green body are 2-10 mums, and the green body can be directly hot-rolled without forging. The method can avoid the occurrence of eutectic ledeburite, and has such advantages as simple process, low cost and low energy consumption.

Description

technical field [0001] The invention relates to a process method for preparing high-alloy cold-working die steel by spray deposition. Background technique [0002] Spray deposition is a near-net shape, semi-solid metallurgical forming processing technology developed on the basis of powder metallurgy gas atomization powder production. It can not only overcome the defects of coarse grains, serious composition segregation, and coarse network carbides brought about by the traditional smelting and casting process, but also avoid multiple processes such as powder making, pressing, and sintering of powder metallurgy. Spray deposition technology has gradually become one of the hotspots in the research and industrialization development of materials science and engineering. [0003] The material prepared by the spray deposition technology has a series of characteristics of the rapid solidification material, that is, the microstructure is uniform and fine, no macro segregation, no coa...

AI Technical Summary

Problems solved by technology

It can be seen that there are many processes, and the investment in hot isostatic pressing process equipment is quite large, and the cost is very high

Images