Boron-containing wear-resistant alloy steel and preparation method thereof

Abstract

The invention relates to boron-containing wear-resistant alloy steel and a preparation method thereof. The alloy steel is prepared from the following components in percentage by weight: 0.6-0.9% of C,5-5.8% of Cr, 0.5-1.4% of B, 0.5-0.8% of Ni, 0.6-1.0% of Mn, 0.6-1.0% of Si, 0.35-0.5% of Nb, 1.0-2.0% of W, 0.55-0.75% of Ti, less than 0.03% of S, less than 0.03% of P and the balance of Fe and inevitable impurity elements. The boron-containing wear-resistant alloy steel is prepared by adopting a compound method of modification and mechanical vibration. The preparation method comprises the following steps: adding Ti, Nb and W into molten steel for modification; pouring smelted molten iron into a cast fixed to a vibrating device; and starting the vibrating device after pouring to vibrate themolten steel mechanically. According to the invention, grains can be refined effectively, shapes and distribution of borides in tissues can be improved, and the impact toughness of the material can be improved while the hardness of the material is guaranteed. Moreover, required equipment and process are simple, the adding amount of noble metals is small, the production cost is low, and the boron-containing wear-resistant alloy steel is easily popularized and applied in industrial production.

Description

technical field [0001] The invention belongs to the technical field of iron and steel materials, and in particular relates to a boron-containing wear-resistant alloy steel and a preparation method thereof. Background technique [0002] Material wear is common in many industrial sectors such as mining, metallurgy, machinery, building materials, etc. It is an important cause of equipment failure, and the economic loss caused by material wear is huge every year. At present, the widely used wear-resistant materials mainly include high-manganese steel, medium-low alloy wear-resistant steel and high-chromium cast iron. Among them, high-manganese steel can only reflect its good wear resistance when the stress is high, the abrasive is hard and the impact is large. , and due to the high work hardening ability of high manganese steel, it is difficult to cut it. At the same time, high manganese steel has the disadvantages of low yield strength and easy deformation, which greatly restri...

AI Technical Summary

Problems solved by technology

Although the process described in the above patent application has high hardness and impact toughness, heat treatment is carried out on the casting, and the heat treatment process is relatively complicated, which prolongs the production cycle of the casting

[0004] Modification treatment and heat treatment are common processes for improving the microstructure and properties of boron-containing steels, but practice shows that only modification treatment can improve performance to a limited extent, and the heat treatment process is generally more complicated. In order to make boron-containing alloy steels better For actual production, it is necessary to develop a preparation method that significantly improves the structure and properties of boron-containing alloy steel with simple process and easy operation.