Steel for nitrogen vanadium microalloyed grinding rod and preparation method thereof

A technology of microalloying and rod grinding, which is applied in the field of iron and steel metallurgy, can solve the problems of high content of alloying elements and increased production costs, and achieve the effects of low alloy content, high cleanliness, and reduced production costs

Active Publication Date: 2014-07-02
LAIWU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Steel for nitrogen vanadium microalloyed grinding rod and preparation method thereof
  • Steel for nitrogen vanadium microalloyed grinding rod and preparation method thereof
  • Steel for nitrogen vanadium microalloyed grinding rod and preparation method thereof

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with exemplary embodiments, but the present invention is not limited thereto.

[0018] The chemical composition of the steel for vanadium nitrogen microalloyed grinding rods according to the present invention includes 0.65% to 0.72% of C, 0.20% to 0.30% of Si, 1.10% to 1.50% of Mn, and no more than 0.025% of P, not more than 0.015% of S, 0.10% to 0.20% of Cr, 0.04% to 0.10% of V, 0.015% to 0.040% of Alt, not more than 1.5×10 -4 %H, 100×10 -4 %~140×10 -4 % of N, not exceeding 15×10 -4 % T.O, the balance is Fe and unavoidable impurities.

[0019] As a preferred embodiment of the present invention, the chemical composition of the vanadium-nitrogen microalloyed grinding rod steel according to the present invention includes 0.68% to 0.70% of C, 0.23% to 0.26% of Si, 1.25% to 1.35% Mn, not more than 0.015% of P, not more than 0.010% of S, 0.14% to 0.18% of Cr, 0.05% to 0.08% of V, 0.020% to 0.035% of Alt...

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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...

Claims

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Application Information

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IPC IPC(8): C22C38/24
Inventor 李法兴翟正龙徐锡坤张伟孙永喜张君平卢乃双刘永昌欧阳峥嵘袁淑君
Owner LAIWU IRON & STEEL GRP
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