Medium carbon steel material for pump bearing and preparation method of medium carbon steel material

Abstract

The invention discloses a medium carbon steel material for a pump bearing. The medium carbon steel material contains the following chemical elementary components in percentage by mass: 0.4-0.6% of C, 0.4-0.6% of Si, 1.1-1.3% of Mn, 0.7-0.9% of Cr, 0.03-0.05% of Ni, 0.12-0.15% of Mo, 0.6-0.8% of Co, 0.02-0.04% of V, 0.5-0.7% of W, 0.2-0.4% of Ti, 0.01-0.02% of Yb, 0.03-0.04% of Lu, less than or equal to 0.04% of S, less than or equal to 0.04% of P and the balance of Fe. The alloy steel prepared by adding various elements such as rear earth elements, tungsten, molybdenum and the like is high in hardness, good in wear resistance, favorable in toughness of medium carbon, strong in impact resistance, suitable for key parts such as the pump bearing and the like, long in service life and not easy to damage; a refining agent is used for casting production, so that the porosity in a casting is reduced by 1-2, and oxide inclusions are kept at about level 2.

Description

technical field [0001] The invention relates to the field of metal material preparation, in particular to a medium-carbon steel material for 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 medium-carbon steel mate...

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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