High-temperature-resistant artificial crystal forming die steel material and preparation method thereof

Abstract

The invention discloses a high-temperature-resistant artificial crystal forming die steel material and a preparation method thereof. The die steel material comprises the following components in percentages by weight: 0.38-0.45% of C, 0.50-0.70% of Si, 0.40-0.60% of Mn, less than or equal to 0.020% of P, less than or equal to 0.010% of S, 5.20-5.50% of Cr, 0.80-1.20% of Ni, 1.40-1.80% of Mo, 0.50-0.80% of V, 1.40-1.80% of W, 0.10-0.20% of Nb, 0.001-0.003% of Y, 0.001-0.005% of B, less than or equal to 80 ppm of [N], less than or equal to 2 ppm of [H], less than or equal to 15 ppm of [O] and thebalance of Fe; and during preparation, a smelting process of EBT smelting, LF refining, VD vacuum degassing and ESR electroslag secondary dissolving and a steel treatment process of steel ingot annealing, forging, steel annealing and ultra-fine heat treatment are adopted, the special die steel material for forming a high-temperature-resistant artificial crystal craft is obtained, the steel of theinvention has the hardness being HRC60, and the durability of properties such as high temperature fatigue strength and cold and hot fatigue strength is superior to the durability of properties such as high temperature fatigue strength and cold and hot fatigue strength of like products in China.

Description

technical field [0001] The invention relates to the technical field of tool and die steel materials, in particular to a high-temperature-resistant artificial crystal forming die steel material and a preparation method thereof. Background technique [0002] The national standard GB / T1299-2014 for tool and die steel, which was implemented in September 2015 in my country, has a total of 92 varieties listed, basically forming a series of tool and die steel with Chinese characteristics. Especially since the reform and opening up, my country's mold industry has entered a period of rapid development, which has greatly promoted the production of mold materials and the progress of application technology. With the development of my country's modern industry, some domestic universities, research institutions and steel mills have successively developed some cold-work die steels, hot-work die steels and plastic die steels while introducing, assimilating and assimilating foreign advanced ...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a high-temperature-resistant mold steel for the problems of low thermal fatigue resistance, poor oxidation resistance, short service life of artificial crystal molding molds, and low surface finish of produced products in current domestic mold steel materials. Artificial crystal molding die steel material and preparation method thereof

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