Steel for nitrogen vanadium microalloyed grinding rod and preparation method thereof

Abstract

The invention discloses a steel for a nitrogen vanadium microalloyed grinding rod and a preparation method of the steel. The steel for the nitrogen vanadium microalloyed grinding rod comprises the following chemical components by weight percent: 0.65-0.72% of C, 0.20-0.30% of Si, 1.10-1.50% of Mn, less than 0.025% of P, less than 0.015% of S, 0.10-0.20% of Cr, 0.04-0.10% of V, 0.015-0.040% of Alt, less than 1.5*10<-4>% of H, 100*10<-4>-140*10<-4>% of N, less than 15*10<-4>% of T. O and the balance of Fe and unavoidable impurities. The preparation method of the nitrogen vanadium microalloyed grinding rod comprises the steps of carrying out primary smelting by an electric furnace, refining by a ladle refining furnace (LF), carrying out vacuum degassing (VD), continuously casting, slowly cooling a casting blank, rolling and finishing. The steel for the nitrogen vanadium microalloyed grinding rod is low in production cost, compact and even in structure, high in cleanliness, fine and small in crystal particles, and has the characteristics of high strength and toughness, wear resistance and the like; the requirement on the performances of the steel for the grinding rod under the low impact stress working condition can be met.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a steel for vanadium nitrogen microalloyed grinding rods and a preparation method thereof. Background technique [0002] Wear-resistant materials are widely used in mining, metallurgy, coal, machinery, electric power and other industries, and are divided into metal wear-resistant materials and non-metal wear-resistant materials. Among them, metal wear-resistant materials mainly include: (1) Austenitic high manganese steel, this type of steel has the characteristics of high strength, high toughness, wear resistance, etc. Function; under the condition of low stress impact abrasive wear, high manganese steel wear-resistant materials cannot give full play to their material performance advantages. At the same time, due to their high alloy content, unnecessary manufacturing and use costs will be increased, resulting in waste of resources; (2) Steel Wear-resistant composite mat...

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Problems solved by technology

According to the steel material of this patent application, W is first added in the production process to fully integrate W into molten steel to increase its hardness. The steel material is resistant to high temperature and corrosion, and can be more safely used in metallurgy, mining, cement, ceramics and other industries , but there are also problems such as high content of alloying elements, which will increase production costs when used under low impact stress conditions

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