Alloy steel material for rotor of cam rotor pump and preparation method thereof

Abstract

The invention relates to an alloy steel material for a rotor of a cam rotor pump, which comprises the following chemical element components in percentage by mass: 0.2-0.3% of carbon, 0.2-0.4% of silicon, 1.2-1.5% of titanium, 0.02-0.05% of boron, 4.2-4.5% of chromium, 2.2-2.5% of manganese, 0.4-0.6% of molybdenum, 0.2-0.4% of zinc, 0.02-0.05% of In, 0.3-0.5% of As, 0.08-0.12% of Hf, 0.15-0.18% of Bi, no more than 0.030% of P, no more than 0.030% of S and the balance of iron. According to the invention, the alloy steel formed by combination of multiple raw materials such as boron, hafnium and the like has the characteristics of high strength, high hardness, favorable wear resistance and corrosion resistance; part of waste iron is used as a raw material and is subjected to secondary refining, so that the quality is stabler and more uniform, and the content of harmful elements such as sulfur, phosphorus and the like is lower; and a refining agent is added, so that the porosity is reduced by 1-2 levels, and the oxide inclusion is approximately at Level 2.

Description

technical field [0001] The invention relates to the field of metal material preparation, in particular to a cam rotor pump rotor 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, rolling bearing steel, tool steel, special performance steel, Various alloy steels with excellent properties such as heat-resistant steel and low-temperature steel. [0003] There are many kinds of alloy steels for pump valves, and the technology has made great progress, but there are still many problems, such as wear resistance, hardness, rust resistance, corrosion resistance, high and low temperature resistance, brittleness, toughness, etc. In many occasions, the production requirements cannot be met, and further improvements are needed to improve pro...

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Problems solved by technology

[0003] There are many kinds of alloy steels for pump valves, and the technology has made great progress, but there are still many problems, such as wear resistance, hardness, rust resistance, corrosion resistance, high and low temperature resistance, brittleness, toughness, etc. Many occasions still cannot meet the requirements of production, and further improvement is needed to improve production efficiency, reduce costs, improve safety, provide guarantee for the development of high-tech, and provide impetus for social development. The task is still very arduous