Wear resistant steel cast and method for manufacturing the same

Abstract

The invention provides a novel martensite and bainite wear-resistant casting steel material and a manufacturing method thereof. The material is characterized in that the material is formed by taking C, Cr and Mo alloy elements with lower content as main constituents and assisting with a small amount of V, Ti, B and RE alloy elements. The material can obtain a microscopic structure consisting of tempered martensite, lower bainite and a small amount of remaining austenite after heat treatment, which ensures that the material has higher toughness and good wear resistance, can bear larger shock and violent impact, also has good abrasion resistance against grinding aids, has the comprehensive mechanical property superior to those of high and middle manganese austenite casting steel, and is an ideal material for manufacturing spare parts used in severer environment.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a wear-resistant cast steel used for manufacturing impact-resistant grinding spare parts. Background technique [0002] Most of the spare parts used in metallurgy, mining, machinery, electric power and other harsh working conditions are made of traditional high manganese steel. The main chemical composition of high manganese steel is (wt%): C 0.9-1.5, Si 0.3-1.0, Mn 11.0-14.0, S<0.05, P<0.09, and the balance is Fe. The hardness of the steel is only HBS229, and the tensile strength is 735Mpa. Research in recent years has shown that high manganese steel is not wear-resistant when it is resistant to small and medium energy impact abrasive wear. For example, the liner of the ball mill is made of high manganese steel. Since the structure of high manganese steel is austenite, the hardness is low and the wear resistance is poor. Especially in the case of no s...

AI Technical Summary

Problems solved by technology

Although this kind of cast steel has high hardness and good wear resistance, it has low strength and can only work under small impact loads.

In addition, due to the complex chemical composition of the steel and the high content of precious metals such as Cr, not only the price of the steel is expensive, but also alloy elements such as Ca, Ce, Ba are difficult to control during smelting