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Wear-resistant alloy steel, alloy grinding ball and preparation method of wear-resistant alloy steel

A technology of alloy steel and alloy, which is applied in the field of wear-resistant alloy steel, alloy grinding ball and its preparation, and can solve the problems of poor hardenability, poor core and surface hardness, poor wear resistance, etc.

Inactive Publication Date: 2015-05-27
清原满族自治县三方耐磨材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The inventor not only found that the hardness of the existing rolled grinding balls is not as high as that of the cast grinding balls, but the hardenability of the existing rolled grinding balls is poor, and the hardness difference between the core and the surface is relatively large, which makes the wear resistance natural Worse than cast balls

Method used

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  • Wear-resistant alloy steel, alloy grinding ball and preparation method of wear-resistant alloy steel

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preparation example Construction

[0038] On the other hand, an embodiment of the present invention provides a preparation method of wear-resistant alloy steel, the preparation method comprising the following steps:

[0039]1) Refining and tempering the molten steel so that the composition of the molten steel is, by weight percentage, 0.90-1.00% carbon, 0.35-0.45% silicon, 0.50-0.60% manganese, and 1.1-1.3% chromium , molybdenum is 0.25-0.35%, boron is 0.07-0.09%, rare earth is 0.3-0.5%, sulfur is 0-0.016%, phosphorus is 0-0.015%, copper is 0-0.06%, and the balance is iron and unavoidable of impurities.

[0040] In this step, conventional molten steel can be used as the molten steel; steel scrap, ferrosilicon, ferromanganese, ferrochromium and ferromolybdenum can also be smelted into molten steel in a smelting furnace. Wherein, the smelting furnace can be any one of converter, electric arc furnace or intermediate frequency furnace.

[0041] In this step, the step of tempering the molten steel is as follows: i...

Embodiment 1

[0055] 1) After preliminary quenching and tempering of the molten steel melted in the smelting furnace, the molten steel is transferred to the ladle refining furnace for refining. After refining, the molten steel is subjected to micro-conditioning, deoxidation, desulfurization, impurity removal and alloying, so that the composition of the molten steel is : By weight percentage, carbon is 0.95%, silicon is 0.40%, manganese is 0.55%, chromium is 1.2%, molybdenum is 0.30%, sulfur is 0-0.016%, phosphorus is 0-0.015%, copper is 0% -0.06%, the balance is iron.

[0056] 2) Add boron and rare earth to the ladle, pour the molten steel obtained in step 1) into the ladle for inoculation and boiling to fully dissolve the boron and rare earth, and the boron and rare earth content in the molten steel obtained after dissolving are 0.08% and 0.40%.

[0057] 3) Pour the molten steel obtained in step 2) into a mold for molding and cooling to obtain a steel rod with a diameter of 100 mm (ie, a r...

Embodiment 2

[0062] 1) After preliminary quenching and tempering of the molten steel melted in the smelting furnace, the molten steel is transferred to the ladle refining furnace for refining, and the refined molten steel is subjected to micro-conditioning, deoxidation, desulfurization, impurity removal and alloying to make the composition of the molten steel In terms of weight percentage, carbon is 0.90%, silicon is 0.35%, manganese is 0.50%, chromium is 1.1%, molybdenum is 0.25%, sulfur is 0-0.014%, phosphorus is 0-0.007%, copper is 0-0.005%, the balance is iron.

[0063] 2) Add boron and rare earth to the ladle, pour the molten steel obtained in step 1) into the ladle for inoculation and boiling to fully dissolve the boron and rare earth, and the boron and rare earth content in the molten steel obtained after dissolving are 0.07% and 0.50%.

[0064] 3) Pour the molten steel obtained in step 3) into a mold for molding and cooling to obtain a steel rod with a diameter of 90 mm (ie, a rod-...

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Abstract

The invention discloses wear-resistant alloy steel, an alloy grinding ball and a preparation method of the wear-resistant alloy steel, and relates to the technical field of metallurgy, aiming at solving the problem that an alloy grinding ball which is good in ductility and good in wear resistance cannot be prepared by a rolling process in the prior art. The main technical scheme of the invention is as follows: the wear-resistant alloy steel consists of the following substances in percentage by weight: 0.90-1.00% of carbon, 0.35-0.45% of silicon, 0.50-0.60% of manganese, 1.1-1.3% of chromium, 0.25-0.35% of molybdenum, 0.07-0.09% of boron, 0.3-0.5% of rare earth, 0-0.016% of sulfur, 0-0.015% of phosphor, 0-0.06% of copper and the balance of iron and inevitable impurities. The invention prepares the wear-resistant alloy steel and the alloy grinding ball which are high in ductility and wear-resistant mainly by virtue of a rolling process.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a wear-resistant alloy steel with good toughness and wear resistance, an alloy grinding ball and a preparation method thereof. Background technique [0002] At present, metallurgical beneficiation, thermal power generation and other industries need to use alloy grinding balls (steel balls) as grinding media during operation. The consumption of grinding media is relatively large, and the world consumes about 10 million tons per year. [0003] At present, the preparation process of alloy grinding balls on the market mainly includes two types: casting and rolling; among them, the casting grinding balls prepared by the casting process have good wear resistance, and are well received by the manufacturers; but casting grinding balls are used in casting The process not only consumes a lot of energy, but also pollutes the environment. In addition, cast grinding balls cannot be used on...

Claims

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Application Information

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IPC IPC(8): C22C38/32C22C38/54C22C33/04C21D1/18
CPCC22C38/22C21D1/18C22C33/04C22C38/005C22C38/02C22C38/04C22C38/18C22C38/20C22C38/32C22C38/40C22C38/44C22C38/54
Inventor 章学良刘火林
Owner 清原满族自治县三方耐磨材料有限公司
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