Hot work die steel material and preparation method thereof

Abstract

The invention provides a hot work die steel material and a production process thereof. The hot work die steel material is characterized by comprising the following chemical components in percentage by weight: 0.36-0.44% of C, 0.10-0.25% of Ti, 0.10-0.50% of Mn, 0.15-0.20% of Nb, 5.0-5.5% of Cr, 0.20-0.25% of Mo, 1.0-1.5% of V, 0.10-0.15% of B, 1.50-2.00% of W, 0.50-0.70% of Si, less than or equal to 0.025% of S, less than or equal to 0.020% of P and the balance of Fe. The hot work die steel material has the characteristics of high tempering resistance and high thermal fatigue resistance.

Description

technical field [0001] The invention belongs to the technical field of metal materials and processing, in particular to the scope of mold manufacturing and use, and relates to a hot work mold steel and a manufacturing process thereof. Background technique [0002] Mold is the basic process equipment for industrial production. In products such as electronics, automobiles, motors, electrical appliances, instruments, home appliances and communications, 60-80% of parts are formed by molds, so molds are called "the mother of all industries". . With the development and expansion of the mold market year by year, the consumption of mold steel, which is the material for producing molds, is also increasing significantly, and the consumption of hot work mold steel accounts for more than 30% of the mold steel products. Hot work die steel has appropriate hardness requirements, focusing on red hardness, thermal conductivity, and wear resistance. Therefore, the carbon content is low, and...

AI Technical Summary

Problems solved by technology

Therefore, all countries in the world are constantly researching and developing new hot work mold materials. The commonly used hot work molds in my country, such as 5CrNiMo and 5CrMnMo, have poor heat resistance, and 3Cr2W8V (H21) steel has serious carbide segregation, plasticity, toughness, and thermal conductivity. , poor cold and heat fatigue resistance and corrosion resistance, etc. The current H13 steel (4Cr5MoSiV1) new hot work die steel has a large tendency to crack when the die is used in the early stage, and the die repair rate is low.