A martensite alloy steel material used for an air valve of an internal combustion engine and a preparation method of the alloy steel material

Abstract

The invention discloses a martensite alloy steel material used for an air valve of an internal combustion engine. The alloy steel material comprises following elements by weight: 0.6-0.8% of carbon, 0.2-0.3% of silicon, 3.3-3.5% of manganese, 0.4-0.5% of chromium, 0.03-0.05% of molybdenum, 0.004-0.005% of vanadium, 0.06-0.08% of Ti, 2.3-2.5% of Ni, 0.01-0.03% of Sb, S not more than 0.030% and P not more than 0.030%, with the balance being iron. According to the alloy steel material and the method, by using composition of the antimony and other raw materials, and by reasonably arranging the ratio and the production technology and reasonably arranging the adding sequence, the alloy material formed has characteristics of high strength, high hardness, good wear resistance, good toughness, resistance to high-temperature corrosion, oxidation resistance, and the like. The alloy steel material is suitable for the air valve of the internal combustion engine so that the air valve has high air tightness. A portion of waste iron is used as a raw material to make the alloy quality stable and uniform. By addition of a refining agent, the porosity degree is reduced by 1-2 degrees.

Description

technical field [0001] The invention relates to the field of metal material preparation, in particular to a martensitic alloy steel material for an internal combustion engine valve 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 ...

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