High-strength wear-resisting cast steel

Abstract

The invention relates to high-strength wear-resisting cast steel which comprises the following chemical components in percentage by mass: 0.3-0.8 percent of carbon, 0.45-1.35 percent of silicon, 1.2-1.8 percent of manganese, 0.75-1.9 percent of chrome, 0.06-0.1 percent of boron, 0.05-0.2 percent of titanium, 0.07-0.18 percent of yttrium, 0.06-0.14 percent of magnesium and the balance of ferrum. The high-strength wear-resisting cast steel has the advantages of simple formula, abrasive resistance and low use cost.

Description

technical field [0001] The invention relates to a cast steel, in particular to a high-strength wear-resistant cast steel. Background technique [0002] At present, there are three main categories of widely used wear-resistant materials: ① high manganese steel; ② low and medium alloy wear-resistant steel; ③ high chromium cast iron. Since the advent of high manganese steel in 1882, it has a history of more than 100 years. It has become a traditional wear-resistant material and has been widely used. In the 1950s and 1960s, my country almost used high manganese steel as a universal wear-resistant material. It has been found in practice that the wear resistance of high manganese steel is conditional. Only under the condition of large impact, high stress and hard abrasive can high manganese steel be wear-resistant. Moreover, its yield strength is low and easy to deform. Therefore, it has been gradually replaced by other wear-resistant materials in many fields. Low and medium al...

AI Technical Summary

Problems solved by technology

Low and medium alloy wear-resistant steels have better strength and toughness, and the wear resistance under low and medium impact loads is better than that of high manganese steels, but they have the disadvantages of low hardenability and hardenability, and poor wear resistance

High-chromium cast iron contains more than 20% of high-hardness eutectic carbides, which has excellent wear resistance, but has the disadvantages of high content of alloying elements, high production costs, and easy deformation and cracking during high-temperature heat treatment. Ordinary white cast iron and Low-alloy white cast iron carbides have low hardness, and the carbides are distributed in a continuous manner, with high brittleness and easy peeling or even cracking during use

[0003] At present, the wear-resistant alloy steel commonly used in the market generally contains precious metals, which makes the use cost higher