High-toughness high-wear-resistance cold work die steel and manufacturing process thereof

Abstract

The invention discloses high-toughness high-wear-resistance cold work die steel and a manufacturing process thereof, and relates to the technical field of die steel. The high-toughness high-wear-resistance cold work die steel comprises the following components in percentage by mass: 0.7 percent to 0.9 percent of C, 0.2 percent to 0.4 percent of Si, 0.5 percent to 0.8 percent of Mn, 1.0 percent to 1.5 percent of Mo, 12.0 percent to 15.0 percent of Cr, 0.5 percent to 0.8 percent of V, 0.6 percent to 0.8 percent of Nb, 0.02 percent to 0.05 percent of Y, 0.01 percent to 0.05 percent of Ti, 1.0 percent to 1.5 percent of W, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P, and the balance Fe and other inevitable impurities. The manufacturing process comprises the following steps of LF refining, VD refining and pouring, wherein yttrium-based rare earth is added along with flow in the process that molten steel obtained after VD refining in the step S2 is poured into a die. The high-toughness high-wear-resistance cold work die steel and the manufacturing process thereof provided by the invention have the advantage that the toughness and the wear resistance of the steel are improved.

Description

technical field [0001] The application relates to the technical field of wear-resistant steel, more specifically, it relates to a high-toughness and high-wear-resistant cold-working die steel and its manufacturing process. Background technique [0002] Cold work die steel is mainly used to manufacture various dies for pressing and forming metal materials at room temperature, including blanking dies, embossing dies, etc. Since the metal material is processed at room temperature, the metal material will generate greater stress and friction on the mold during processing, so there are higher requirements for the hardness and wear resistance of the mold. [0003] At present, the die steel is mainly Cr12 series cold work die steel represented by D2 (Cr12Mo1V1) of cold work die steel in GB / T 34564.1, which has high wear resistance. [0004] When applying molds of this type of material for actual production, the inventors found the following defects: due to the serious segregation ...

AI Technical Summary

Problems solved by technology

[0005] In order to improve the problem that the poor toughness of the current die steel affects the service life, the application provides a high toughness and high wear resistance cold work die steel and its manufacturing process

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