A kind of high toughness alloy steel material and preparation method thereof

Abstract

The invention provides a high-toughness alloy steel material. The material comprises the following chemical elements by mass percent: 0.02%-0.05% of carbon, 6.0%-6.3% of manganese, 0.45%-0.75% of silicon, 3.3%-2.5% of nickel, 0.04%-0.05% of chromium, 0.005%-0.008% of molybdenum, 0.02%-0.05% of vanadium, 0.3%-0.5% of copper, not more than 0.030% of P, not more than 0.030% of S and the balance being iron. The material has the beneficial effects that by combining the raw materials such as nickel, molybdenum and vanadium and reasonably setting the ratio, the production process and the putting order, the formed alloy material has excellent toughness and plasticity, high strength and wear resistance and low aging sensitivity and cold brittleness; part of scrap iron is used as the raw material, thus improving the stability and uniformity of alloy quality; the material has good processability and is suitable for various parts subjected to forging, stretching processing and the like; the porosity is reduced by 1-2 degrees by adding a refining agent.

Description

technical field [0001] The invention relates to the field of metal material preparation, in particular to a high-toughness alloy steel material and a preparation method thereof. Background technique [0002] The development of alloy steel has a history of more than 100 years. So far, a variety of alloy steels have been applied in industry, mainly including the following types: quenched and tempered steel, spring steel, tool steel, high speed steel, die steel, high school Low-carbon alloy steel, etc., so far, although alloy steel technology has been greatly developed, there are still many problems, such as wear resistance, hardness, rust resistance, corrosion resistance, high and low temperature resistance, brittleness, toughness, Costs cannot be taken into account. In many cases, the production requirements cannot be met, and further improvements are needed to improve production efficiency, reduce costs, improve safety, provide guarantee for the development of high-tech, and...

AI Technical Summary

Problems solved by technology

[0002] The development of alloy steel has a history of more than 100 years. So far, a variety of alloy steels have been applied in industry, mainly including the following types: quenched and tempered steel, spring steel, tool steel, high speed steel, die steel, high school Low-carbon alloy steel, etc., so far, although alloy steel technology has been greatly developed, there are still many problems, such as wear resistance, hardness, rust resistance, corrosion resistance, high and low temperature resistance, brittleness, toughness, Costs cannot be taken into account. In many cases, the production requirements cannot be met, and further improvements are needed to improve production efficiency, reduce costs, improve safety, provide guarantee for the development of high-tech, and provide impetus for social development. There are still many tasks to be done. difficult