Manganese steel material for pump shaft and preparation method thereof

Abstract

The invention discloses a manganese steel material for a pump shaft. The manganese steel material comprises the following chemical elements in percentage by mass: 0.2-0.4% of carbon, 0.4-0.6% of silicon, 5.2-5.4% of manganese, 1.5-1.7% of chrome, 0.3-0.5% of nickel, 1.3-1.5% of molybdenum, 0.6-0.8% of niobium, 1.2-1.4% of titanium, 0.02-0.04% of lanthanum, 0.04-0.07% of As, S not higher than 0.05%, P not higher than 0.05%, and the balance of iron. Low-carbon and medium-carbon steel is modified through using such elements as lanthanum, manganese and titanium; a formed alloy not only has high hardness, strength, toughness and wear resistance, but also has a certain corrosion resistance; the alloy steel is used for the pump shaft, and is obviously long in service life. Refining agent is used for foundry practice, obviously improves the yield, in particular reduces the porosity of castings by 1-2 degrees without generating air holes in the surfaces of the castings, and obviously reduces oxide inclusions; and the oxide inclusions are about in grade 2.

Description

technical field [0001] The invention relates to the field of metal material preparation, in particular to a manganese steel 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 provide a manganese steel material for ...

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