A rhenium-containing wear-resistant high-hardness alloy material for a pump shaft

Abstract

The invention relates to a rhenium-containing wear-resistant high-hardness alloy material for pump shafts, which contains the following chemical components in percentage by mass: 0.2-0.4% of carbon, 0.3-0.4% of silicon, 1.1-1.3% of manganese, 1.5-1.7% of nickel, 2.1-2.3% of chromium, 0.02-0.04% of rhenium, 0.04-0.07% of Pb, at most 0.04% of S, at most 0.04% of P and the balance of iron. The rhenium, chromium, nickel and other elements are utilized to modify low-carbon steel, thereby greatly enhancing the hardness and wear resistance of the steel. The raw materials are fed by several times, and the post-casting heat treatment temperature is reasonably controlled, so the obtained alloy steel has excellent comprehensive mechanical properties and high 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. When the refining agent is used for casting production, the porosity in the casting is lowered by 1-2 degrees, and the oxide inclusions are in the second grade or so. The alloy steel is used for pump shafts, and has the advantages of corrosion resistance, wear resistance and long service life.

Description

technical field [0001] The invention relates to the field of metal material preparation, in particular to a rhenium-containing wear-resistant high-hardness alloy material for a pump shaft and a preparation method thereof. Background technique [0002] The working environment of pump valves is diverse and harsh, and the requirements for materials are very high. At present, there are many kinds of alloy steel used in pump valves, and the technology has made great progress, but there are still many problems, such as wear resistance, hardness, rust resistance Performance, corrosion resistance, high and low temperature resistance, brittleness, toughness, etc., cannot meet the production requirements in many occasions, and further improvement is needed to improve production efficiency, reduce costs, and improve safety. Guaranteeing and providing impetus for social development are still arduous tasks. Contents of the invention [0003] The object of the present invention is to p...

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Problems solved by technology

[0002]Pumps and valves work in various and harsh environments, and have high requirements for materials. At present, there are many kinds of alloy steels used for pumps and valves, and the technology has made great progress, but There are still many problems, such as wear resistance, hardness, antirust performance, corrosion resistance, high and low temperature resistance, brittleness, toughness, etc., which cannot meet the production requirements in many occasions, and further improvement is needed to increase production efficiency. , reduce costs, improve safety, provide guarantee for the development of high-precision technology, and provide impetus for social development, the task is still very arduous