Method for producing 4Cr5MoSiV1 mold steel by continuous casting electroslag

Abstract

The invention belongs to the technical field of steel production methods, and particularly provides a method for producing 4Cr5MoSiV1 mold steel by continuous casting electroslag. The method comprises the following steps that an electric-arc furnace smelts molten steel, a ladle refining furnace refines the molten steel, a vacuum degassing furnace refines the molten steel, continuous casting 235mm x 265mm medium square billet is conducted, electroslag remelting is conducted, heating rolling is conducted, and annealing is conducted. The molten steel component is controlled by, in mass percentage, C: 0.37-0.43%, Mn: 0.30-0.50%, Si: 0.90-1.20%, P: <0.025%, S: 0.010%, Cr: 4.80-5.50%, Mo: 1.20-1.50%, V: 0.90-1.10%, Cu: <0.25%, Ni: <0.25%. The balance is iron and unavoidable impurities. The method for producing 4Cr5MoSiV1 mold steel by continuous casting electroslag uses technology of the continuous casting billet + electroslag remelting + rolling replacing forging to manufacture and produce 4Cr5MoSiV1 mold steel, the comprehensive mechanical properties of the 4Cr5MoSiV1 mold steel are ensured, the production rate of the 4Cr5MoSiV1 mold steel is improved, so that production costs are reduced and production efficiency is increased.

Description

technical field [0001] The invention belongs to the technical field of steel production methods, and in particular provides a method for producing 4Cr5MoSiV1 mold steel by continuous casting electroslag. Background technique [0002] Mold steel is an important material in the mold processing and manufacturing industry, which directly affects mold processing, mold quality and product quality. Processing molded parts with molds has a series of advantages such as high production efficiency, good quality, material saving and low cost, and has a wide range of applications. Hot work die steel is an important type of die material. Since hot work dies work at high temperatures for a long time, their structure will change as the service time prolongs, and their performance will change accordingly. Therefore, this requires Hot work die steel has good strength and toughness, cold and heat fatigue performance and high temperature thermal stability. [0003] 4Cr5MoSiV1 is equivalent to...

AI Technical Summary

Problems solved by technology

[0008] However, there are many shortcomings in the above three production processes.

First, the production rate of 4Cr5MoSiV1 mold steel is limited to a certain extent by the die casting process; second, the production of 4Cr5MoSiV1 mold steel by forging can effectively improve the internal structure of the billet, but the production efficiency of the forging method is relatively low. low, and the dimensional accuracy of steel for finished molds is not high; third, high-end products produced by die casting + electroslag remelting steel ingots have relatively high production costs