High speed steel material for large-scale pump bearings and preparation method thereof

Abstract

A high speed steel material for large-scale pump bearings comprises the following chemical element components by mass percent: 1.2-1.4% of carbon, 1.0-1.3% of silicon, 0.8-1.0% of manganese, 2.7-3.1% of chromium,3.9-4.3% of tungsten, 1.2-1.5% of molybdenum, 0.4-0.7% of vanadium, 0.08-0.14% of cobalt, 0.08-0.10% of Nd, not more than 0.04% of S, not more than 0.04% of P, and the balance of iron. The alloy steel of the invention has the advantages of good wear resistance, good toughness, good red hardness, high matrix strength, and high ratio of performance to price; the alloy steel of the invention is suitable for bearings of large-scale pump trucks working at high temperature, is not easy to damage, and is low in cost. The method of the invention adopts a refining agent in the casting production, which significantly improves the yield, especially reduces the degree of porosity in casting by 1-2 degrees, and controls the oxide inclusion level at about grade two.

Description

technical field [0001] The invention relates to the field of metal material preparation, in particular to a high-speed steel material for large pump bearings 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 high-speed steel mate...

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