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Wear-resistant alloy steel material for valve bodies and preparation method thereof

A technology of alloy steel and valve body, which is applied in the field of wear-resistant alloy steel materials and its preparation, to achieve the effects of low harmful elements, increased yield, and stable and uniform quality

Inactive Publication Date: 2014-03-26
张超
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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Embodiment Construction

[0014] A wear-resistant alloy steel material for valve body, the chemical element composition and its mass percentage are: carbon 1.2-1.5, silicon 2.2-2.5, manganese 0.4-0.5, chromium 1.6-1.8, copper 0.6-0.8, Vanadium 1.2-1.4, boron 0.12-0.15, titanium 0.15-0.20, strontium 0.1-0.15, P≤0.030, S≤0.030, and the balance is iron.

[0015] The method for producing the anti-wear alloy steel material for the valve body is:

[0016] (1) Prepare pig iron and scrap iron in a ratio of 1:1 as the source of iron matrix. Put the pig iron into the furnace to melt, desulfurize and deoxidize, use a refining agent to refine once, add alloy components for alloying, and then add scrap iron to melt , Adding refining agent for secondary refining, testing and adjusting the content of chemical elements to qualified, casting, post-casting heat treatment, etc.;

[0017] (2) The batch sequence of adding alloying elements to the furnace during the alloying process is: (1) silicon, chromium, strontium; (2) manga...

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Abstract

The invention relates to a wear-resistant alloy steel material for valve bodies, which contains the following chemical elements in percentage by mass: 1.2-1.5% of carbon, 2.2-2.5% of silicon, 0.4-0.5% of manganese, 1.6-1.8% of chromium, 0.6-0.8% of copper, 1.2-1.4% of vanadium, 0.12-0.15% of boron, 0.15-0.20% of titanium, 0.1-0.15% of strontium, at most 0.030% of S, at most 0.030% of P and the balance of iron. By using the combination of the chromium, manganese, titanium and many other raw materials, the formed alloy steel has the characteristics of high strength, high hardness, favorable wear resistance and favorable corrosion resistance. Part of scrap iron is used as the raw material, and secondary refining is performed, so that the product quality is more stable and uniform. By adding the refining agent, the porosity is lowered by 1-2 degrees, and the oxide inclusions are lowered by 2 levels or so. The alloy steel is suitable for manufacturing valve bodies and is corrosion-resistant, and the service life is obviously prolonged.

Description

Technical field [0001] The invention relates to the field of metal material preparation, in particular to a wear-resistant alloy steel material for a valve body 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 used 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 used in 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 requirements of production cannot be met, and further improvements are needed to imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/34C22C33/04C21D6/00C21C7/00
Inventor 张超
Owner 张超
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