High hardness high-chromium alloy wear-resisting balls and preparation method thereof

A high-chromium alloy and wear-resistant ball technology, which is applied in the direction of manufacturing tools, heat treatment equipment, furnace types, etc., can solve the problems of rough crystal structure of wear-resistant balls, increased consumption of wear-resistant balls, poor wear-resistant performance, etc., and achieve uniform structure Strong, wear-resistant, strong dispersion and bonding effects

Inactive Publication Date: 2018-03-13
NINGGUO ZHENGXING WEAR RESISTANT MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, with the rapid development of industrialization, various large-scale ball mills are increasing year by year, and the existing wear-resistant ball crystal structure is rough, the hardness is relatively low, the impact toughness is low, and the wear resistance is poor. Therefore, the consumption of wear-resistant balls is also greatly increased. growth, which has greatly affected the development of the industry

Method used

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  • High hardness high-chromium alloy wear-resisting balls and preparation method thereof
  • High hardness high-chromium alloy wear-resisting balls and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A high-hardness and high-chromium alloy wear-resistant ball, including the following alloying elements: C2.2%, Si 0.55%, Mn 0.9%, Cr 17%, Cu 0.18%, Mo 0.25%, B 0.12%, Ni 0.46%, the balance is Fe and unavoidable impurities, and the high-hardness high-chromium alloy wear-resistant ball also includes rare earth oxide and nitride fine powder.

[0022] Among them, the rare earth oxide is a mixture of cerium oxide and scandium oxide with a molar ratio of 1:1 accounting for 0.08% of the total mass of the wear-resistant ball; the fine powder of nitride is a mass ratio of 1.5-2% of the total mass of the wear-resistant ball 2: 1-1.5 mixture of silicon nitride and hafnium nitride.

[0023] High hardness and high chromium alloy wear-resistant ball, the preparation steps are as follows:

[0024] 1) Ingredients smelting: Add scrap steel, pig iron, ferromolybdenum, scrap copper, and part of ferromanganese into an intermediate frequency electric furnace, heat and melt, and the melting...

Embodiment 2

[0029] A high-hardness and high-chromium alloy wear-resistant ball, including the following alloying elements: C2.36%, Si 0.6%, Mn 0.8%, Cr 16.5%, Cu 0.21%, Mo 0.32%, B 0.1%, Ni 0.55%, the balance is Fe and unavoidable impurities, and the high-hardness high-chromium alloy wear-resistant ball also includes rare earth oxide and nitride fine powder.

[0030] Among them, the rare earth oxide is a mixture of cerium oxide and scandium oxide with a molar ratio of 1:1 accounting for 0.1% of the total mass of the wear-resistant ball; the fine powder of nitride is a mixture of 1.8% of the total mass of the wear-resistant ball A mixture of silicon nitride and hafnium nitride.

[0031] High hardness and high chromium alloy wear-resistant ball, the preparation steps are as follows:

[0032] 1) Ingredients smelting: Add scrap steel, pig iron, ferromolybdenum, scrap copper, and part of ferromanganese into an intermediate frequency electric furnace, heat and melt, and the melting temperature...

Embodiment 3

[0037] A high-hardness high-chromium alloy wear-resistant ball, including the following alloy elements: C2.42%, Si 0.6%, Mn 1%, Cr 18%, Cu 0.22%, Mo 0.33%, B 0.18%, Ni 0.5%, the balance is Fe and unavoidable impurities, and the high-hardness high-chromium alloy wear-resistant ball also includes rare earth oxide and nitride fine powder.

[0038] Among them, the rare earth oxide is a mixture of cerium oxide and scandium oxide with a molar ratio of 1:1 accounting for 0.14% of the total mass of the wear-resistant ball; the fine powder of nitride is a mixture of 1.6% of the total mass of the wear-resistant ball A mixture of silicon nitride and hafnium nitride.

[0039] High hardness and high chromium alloy wear-resistant ball, the preparation steps are as follows:

[0040] 1) Ingredients smelting: Add scrap steel, pig iron, ferromolybdenum, scrap copper, and part of ferromanganese into an intermediate frequency electric furnace, heat and melt, and the melting temperature is 1580 °...

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Abstract

The invention provides high hardness high-chromium alloy wear-resisting balls and a preparation method thereof. The wear-resisting balls comprise the following alloying elements in percentage: 2.2-2.45% of C, 0.5-0.7% of Si, 0.8-1.2% of Mn, 16-18% of Cr, 0.18-0.23% of Cu, 0.25-0.36% of Mo, 0.1-0.23% of B, 0.4-0.55% of Ni, and the balance of Fe and unavoidable impurities; and the high hardness high-chromium alloy wear-resisting balls further comprise rare-earth oxides and nitride fine powder. According to the high hardness high-chromium alloy wear-resisting balls and the preparation method thereof, through reasonable element proportion and process optimization, the prepared wear-resisting balls are good in comprehensive quality, high in strength and high in hardness, reduced by 7% in abrasion loss, not liable to deformation and sinking, and further prolonged by more than 4 times in service life when compared with that of common high-chromium alloy wear-resisting balls.

Description

technical field [0001] The invention relates to the technical field of wear-resistant balls and their preparation, in particular to a high-hardness, high-chromium alloy wear-resistant ball and a preparation method thereof. Background technique [0002] The ball mill is the key equipment for crushing the material after it is crushed. It is widely used in cement, silicate products, new building materials, refractory materials, chemical fertilizers, black and non-ferrous metal beneficiation, glass ceramics and other production industries, for dry or wet grinding of various ores and other grindable materials. [0003] Wear-resistant ball is a kind of crushing medium used in ball mills. Wear-resistant balls are an important part of ball mills. They are used to crush materials in ball mills. They are mainly divided into two types: one with chromium as the main alloying element White cast iron, referred to as chromium alloy cast iron, the casting grinding ball made of chromium all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C17/20C22C38/42C22C38/44C22C38/54C22C38/46C22C38/56C22C38/02C22C38/04C22C33/06C21D6/00C21D9/36
CPCB02C17/20C21D6/004C21D6/005C21D6/008C21D9/36C22C33/06C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/54C22C38/56
Inventor 李根有李骏
Owner NINGGUO ZHENGXING WEAR RESISTANT MATERIALS
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