Corrosion-resistant, wear-resistant and high-temperature-resistant alloy steel material for pump valve and preparation method thereof

Abstract

The invention relates to a corrosion-resistant, wear-resistant and high-temperature-resistant alloy steel material for a pump valve. The material comprises the following chemical elements in percentage by weight: 0.3-0.5% of carbon, 0.5-0.8% of silicon, 8.2-8.4% of manganese, 4.4-4.6% of chromium, 1.9-2.1% of molybdenum, 5.1-5.3% of nickel, 0.8-1.0% of niobium, 2.2-2.4% of magnesium, 4-5% of zinc, 0.02-0.04% of boron, 3.2-3.4% of titanium, 0.5-0.8% of Be and the balance of ferrum and inevitable impurities. On the basis of low carbon steel, elements such as manganese, boron and magnesium are added, so that the formed alloy steel has extremely good characteristics of corrosion resistance, wear resistance, acid resistance and high hardness. A refining agent is used for foundry practice. The pore degree is reduced by 1-2 degrees, and oxide inclusion is in about level II. According to the alloy steel for the pump valve, the service life is more than doubled compared with that of a common stainless steel acid proof pump.

Description

technical field [0001] The invention relates to the field of metal material preparation, in particular to a corrosion-resistant, wear-resistant and high-temperature-resistant alloy steel material for pump valves 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 can...

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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