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Steel for high-strength wear-resisting type ball grinder steel balls and preparation method thereof

A kind of wear-resistant ball mill technology, which is applied in the field of iron and steel smelting, can solve the problems of narrow application range of ball mill steel balls, affecting grinding and peeling ability, and surface wear of steel balls, so as to enhance wear resistance, impact resistance and friction resistance. , good rolling effect

Inactive Publication Date: 2016-12-14
DENGFENG RONGTAI MACHINERY PARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing steel used to prepare steel balls for ball mills has a certain wear resistance, the strength is not high, and the application range of the steel balls for ball mills prepared is relatively narrow. Long-term use will also cause serious wear on the surface of the steel balls, affecting its grinding and stripping ability , the service life is generally low
Moreover, in the preparation method of steel for ball mill steel balls commonly used, the desulfurization process of steel often takes 30 to 60 minutes, which takes a long time.

Method used

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  • Steel for high-strength wear-resisting type ball grinder steel balls and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The high-strength wear-resistant ball mill steel ball proposed by the present invention includes the following components in weight percentage: C 0.95%, Si 0.3%, Mn 0.95%, Cr 1.2%, W 0.19%, Ti 0.08%, P 0.01% , S 0.02%, the balance is Fe and a small amount of impurities.

[0019] Its preparation method comprises the following steps:

[0020] S1: Smelting, smelting, heating the temperature of the smelting furnace to 1700°C, and adding W, Fe, Cr and Ti with corresponding specific gravity into the smelting furnace for smelting, after all melting, the smelting molten steel is obtained;

[0021] S2: Refining, transfer the above molten steel to a refining furnace at a temperature of 1480°C, add C, Si, Mn, P and S with corresponding specific gravity, and add hexachloroethane at the same time for preliminary refining, and then the preliminary refining The molten steel is subjected to a vacuum degassing process, the pressure of the vacuum chamber is controlled at 50-80Pa, and th...

Embodiment 2

[0024] The high-strength wear-resistant ball mill steel ball proposed by the present invention includes the following components in weight percentage: C 1.0%, Si 0.2%, Mn 1.2%, Cr 1.3%, W 0.23%, Ti 0.10%, P 0.01% , S≤0.02%, the balance is Fe and a small amount of impurities.

[0025] Its preparation method comprises the following steps:

[0026] S1: Melting, heating the temperature of the melting furnace to 1600°C, and adding W, Fe, Cr and Ti with corresponding specific gravity into the melting furnace for melting, after all melting, the molten steel is obtained;

[0027] S2: Refining, transfer the above molten steel to a refining furnace at a temperature of 1500°C, add C, Si, Mn, P and S with corresponding specific gravity, and add hexachloroethane at the same time for preliminary refining, and then the preliminary refining The molten steel is subjected to a vacuum degassing process, the pressure of the vacuum chamber is controlled at 50-80 Pa, and the degassing is carried o...

Embodiment 3

[0030] The high-strength wear-resistant ball mill steel ball proposed by the present invention includes the following components in weight percentage: C0.9%, Si 0.3%, Mn 0.8%, Cr 1.0%, W 0.23%, Ti 0.04%, P 0.02% , S 0.03%, the balance is Fe and a small amount of impurities.

[0031] Its preparation method comprises the following steps:

[0032] S1: Melting, heating the temperature of the melting furnace to 1800°C, and adding W, Fe, Cr and Ti of corresponding specific gravity into the melting furnace for melting, after all melting, the molten steel is obtained;

[0033] S2: Refining, transfer the above molten steel to the refining furnace at a temperature of 1450°C, add C, Si, Mn, P and S with the corresponding specific gravity, and add hexachloroethane at the same time for preliminary refining, and then the preliminary refining The molten steel is subjected to a vacuum degassing process, the pressure of the vacuum chamber is controlled at 50-80Pa, and the degassing is carried...

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Abstract

The invention discloses steel for high-strength wear-resisting type ball grinder steel balls. The steel comprises, by weight, 0.9%-1.0% of C, 0.2%-0.4% of Si, 0.8%-1.2% of Mn, 1.0%-1.3% of Cr, 0.15%-0.23% of W, 0.04%-0.10% of Ti, 0-0.03% of P, 0-0.03% of S, and the balance Fe and a small number of impurities. The preparation method includes the steps that S1, smelting is performed, the W, Fe, Cr and Ti are smelted at first, and smelted molten steel is obtained; S2, refining is conducted, the smelted molten steel is transferred into a refining furnace, the C, Si, Mn, P and S and a refining agent are added for primary refining, and then the vacuum degassing and desulfuration procedures are carried out, so that refined liquid is obtained; and S3, the refined liquid is placed into a continuous casting machine, a casting blank is obtained by forming, cooling and cutting, and then the casting blank is subjected to rough rolling and finish rolling procedures so that the steel for the high-strength wear-resisting type ball grinder steel balls can be obtained. According to the steel, strength and hardness are high, the wear-resisting property is also high, and the service life is long; and purity is high, the degassing and desulfuration speed is also high, and the effect is good.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to a steel for high-strength wear-resistant ball mill steel balls and a preparation method thereof. Background technique [0002] Ball mill steel ball is the medium for ball mill equipment to grind materials. It is the main grinding medium of ball mill. Steel balls play a huge role in the development of the national economy, especially in heavy industry, and are widely used in cement plants, mineral processing plants and alumina plants. Due to the special functions of steel balls, the requirements for the materials used are also high. Although the existing steel used to prepare steel balls for ball mills has a certain wear resistance, the strength is not high, and the application range of the steel balls for ball mills prepared is relatively narrow. Long-term use will also cause serious wear on the surface of the steel balls, affecting its grinding and stripping abi...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/18C22C38/12C22C38/14C22C38/02C22C33/04C21C7/10C21C7/064C21C7/04C21D8/00
CPCC22C38/04C21C7/04C21C7/064C21C7/10C21D8/005C22C33/04C22C38/02C22C38/12C22C38/14C22C38/18
Inventor 房少卿
Owner DENGFENG RONGTAI MACHINERY PARTS CO LTD
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