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Novel martensitic wear resistant steel and production technology for steel casting thereof

A production process, martensitic technology, applied in the field of wear-resistant steel, can solve the problems of low toughness, difficult to meet the use requirements, fracture, etc.

Active Publication Date: 2011-11-02
ANSTEEL GRP MINING CO LTD
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Problems solved by technology

The main problem is that the wear resistance of alloy steel is improved, but the toughness is very low, it is easy to break during use, and it is difficult to meet the use requirements

Method used

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  • Novel martensitic wear resistant steel and production technology for steel casting thereof

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Embodiment

[0031] The chemical composition measured by weight percentage is preferably: C: 0.35% to 0.45%, Si: 0.8% to 1.5%, Cr: 2.1% to 2.5%, Mn: 0.8% to 1.2%, Ni: 0.7% to 1.0% %, Mo: 0.6%-1.0%, Nb: 0.1%-0.3%, Ti: 0.1%-0.15%, Re: 0.04%-0.05%, P, S≤0.04, and the balance is iron.

[0032] A production process of the martensitic wear-resistant steel casting is characterized in that it includes a smelting process, a casting process, a heat treatment process, and a quality inspection.

[0033] The smelting process adopts the oxidation method. Firstly, scrap steel is added for melting, then Mo iron and copper are added, and oxygen blowing is carried out when melting 68-72%. After melting, test the composition, then remove the slag, and then make new slag, enter the reduction period, add Cr iron, Mn iron, Ni iron and Nb iron successively, and carry out the full composition analysis test after the alloy material added is fully melted, according to the test results Adjust each element, after th...

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Abstract

The invention particularly relates to novel martensitic wear resistant steel and a production technology for steel casting thereof, belonging to the technical field of wear resistant steel in iron and metal metallurgy and foundry industry. Chemical components in the novel martensitic wear resistant steel comprise, by weight, C 0.3% to 0.5%, Si 0.8% to 1.5%, Cr 2.1% to 2.5%, Mn 0.8% to 1.5%, Ni 0.7% to 1.2%, Mo, 0.6% to 1.0%, Nb 0.1% to 0.3%, Ti 0.1% to 0.5%, Re 0.04% to 0.05%, and P and S no more than 0.04, with the balance being Fe. The production technology for steel casting comprises a smelting process, a casting process, a heat treatment process and quality inspection. The novel martensitic wear resistant steel provided in the invention can be used for liner plates of ball mills, hammerheads of hammer mills or the like used in metallurgic mines under the condition of low impact, is applicable to wear resistant products used in various mines like gold mines, iron mines and cement quarries, and is a novel wear resistant material capable of substituting conventional high manganese steel. According to results of utilization in ore dressing factories for iron ore and cement, the novel martensitic wear resistant steel has an improved service life 2 to 2.3 times longer than the high manganese steel.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant steel in the iron and steel metallurgical foundry industry, and in particular relates to a novel martensitic wear-resistant steel and a production process for steel castings thereof. Background technique [0002] In recent years, metallurgical wear-resistant products have developed rapidly at home and abroad, and have attracted much attention from all walks of life. Both at home and abroad are looking for new materials and new methods to replace high manganese steel with alloy steel, but with little success. The main problem is that the wear resistance of alloy steel is improved, but the toughness is very low, and it is easy to break during use, so it is difficult to meet the use requirements. Contents of the invention [0003] The purpose of the present invention is to provide a novel martensitic wear-resistant steel. [0004] Another object of the present invention is to provide a new...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/50C21C5/00B22D27/04C21D1/18
CPCY02P10/20
Inventor 韩建国
Owner ANSTEEL GRP MINING CO LTD
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