Pump super-wear-resistant high-hardness alloy steel material and preparation method thereof

Abstract

The invention relates to a pump super-wear-resistant high-hardness alloy steel material which comprises the following chemical element compositions in percentage by mass: 2.2-2.4% of carbon, 0.3-0.4% of silicon, 1.7-1.9% of manganese, 3.4-3.6% of chromium, 5.7-6.2% of tungsten, 0.7-0.9% of vanadium, 2.1-2.3% of molybdenum, 0.5-0.7% of cobalt, 0.2-0.3% of titanium, 1.3-1.5% of magnesium, 0.6-0.8% of aluminum, 0.5-0.7% of boron, 0.04-0.06% of niobium, 0.1-0.15% of gadolinium, less than or equal to 0.04% of S, less than or equal to 0.04% of P, and the balance of iron. Elements of tungsten, boron and the like are added in the pump super-wear-resistant high-hardness alloy steel material on the basis of high-carbon steel, so that the hardness and wear resistance of the alloy can be enhanced, and the thermal strength performance and toughness of the alloy can be increased by using elements of vanadium, niobium and the like; the porosity of castings can be reduced by one to two degrees through a refining agent, and the oxide inclusion is at about 2 level. The alloy steel is applicable to components of impellers, conveying pipelines, valves and the like of a pump.

Description

technical field [0001] The invention relates to the field of metal material preparation, in particular to a super wear-resistant high-hardness alloy steel material for pumps 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 provide a super...

AI Technical Summary

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