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Medium-carbon high-chromium crack-resistant abrasion-proof steel ball and preparation method thereof

A medium-carbon high-chromium, wear-resistant steel technology, applied in grain processing and other directions, can solve problems such as increased chromium and carbon content, reduced steel ball plasticity, and easy to be worn.

Inactive Publication Date: 2017-06-09
芜湖市永帆精密模具科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wear-resistant steel balls are particularly easy to be worn when grinding some hard substances, thus shortening the service life of wear-resistant steel balls
At present, the content of chromium and carbon is usually increased to increase the wear resistance of steel balls, but the increase of chromium and carbon content will reduce the plasticity of steel balls, making them easy to crack and brittle, thus limiting the application of wear-resistant steel balls

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A medium-carbon high-chromium crack-resistant wear-resistant steel ball, C: 0.3%, Si: 0.6%, Mn: 1.25%, Ni: 0.03%, Cr: 14%, Mo: 0.25%, Al: 0.15%, B: 0.03%, Ti: 0.03%, V: 0.05%, W: 0.02%, La: 0.015%, and the remainder is Fe and unavoidable impurities.

[0019] The preparation method of the above-mentioned medium-carbon high-chromium crack-resistant and wear-resistant steel ball comprises the following steps:

[0020] S1. Melt scrap steel, add carbon, silicon, manganese, nickel, chromium, molybdenum, aluminum, boron, titanium, vanadium, tungsten, and lanthanum for refining, adjust the casting temperature to 1465°C, carry out casting, and then lower the temperature to 1325°C , keep it warm for 45s, and then lower the temperature to 629°C to obtain a spherical casting that meets the above range;

[0021] S2. Take the spherical casting obtained in S1, heat it up to 1124°C, keep it warm for 4 hours, quench it with water, cool it to room temperature, heat it up to 675°C, keep ...

Embodiment 2

[0023] A medium-carbon high-chromium crack-resistant wear-resistant steel ball, the weight percentage of each component is as follows: C: 0.25%, Si: 0.7%, Mn: 1.2%, Ni: 0.04%, Cr: 13%, Mo: 0.3 %, Al: 0.1%, B: 0.04%, Ti: 0.02%, V: 0.06%, W: 0.01%, La: 0.02%, and the remainder is Fe and unavoidable impurities.

[0024] The preparation method of the above-mentioned medium-carbon high-chromium crack-resistant and wear-resistant steel ball comprises the following steps:

[0025] S1, smelting scrap steel, adding carbon, silicon, manganese, nickel, chromium, molybdenum, aluminum, boron, titanium, vanadium, tungsten, lanthanum, after refining, adjust the casting temperature to 1430°C, and then carry out casting at 3°C / Cool down to 1300°C at a speed of s, hold for 60s, and then cool down to 657°C at a speed of 5.3°C / s to obtain a spherical casting that meets the above range;

[0026] S2. Take the spherical casting obtained in S1, heat up to 1099°C at a rate of 3.6°C / s, keep it warm f...

Embodiment 3

[0028] A medium-carbon high-chromium crack-resistant wear-resistant steel ball, the weight percentage of each component is as follows: C: 0.35%, Si: 0.5%, Mn: 1.3%, Ni: 0.02%, Cr: 15%, Mo: 0.2 %, Al: 0.2%, B: 0.02%, Ti: 0.04%, V: 0.04%, W: 0.03%, La: 0.01%, and the remainder is Fe and unavoidable impurities.

[0029] The preparation method of the above-mentioned medium-carbon high-chromium crack-resistant and wear-resistant steel ball comprises the following steps:

[0030] S1. After smelting scrap steel, adding carbon, silicon, manganese, nickel, chromium, molybdenum, aluminum, boron, titanium, vanadium, tungsten, and lanthanum for refining, adjust the casting temperature to 1500°C, and perform casting at 2.6°C / Cool down to 1330°C at a speed of s, hold for 30s, and then cool down to 600°C at a speed of 5.7°C / s to obtain a spherical casting that meets the above range;

[0031] S2. Take the spherical casting obtained in S1, heat up to 1150°C at a rate of 3.2°C / s, keep it warm...

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PUM

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Abstract

The invention discloses a medium-carbon high-chromium crack-resistant abrasion-proof steel ball. The medium-carbon high-chromium crack-resistant abrasion-proof steel ball has the following components in percentage by weight of: 0.25-0.35% of C, 0.5-0.7% of Si, 1.2-1.3% of Mn, 0.02-0.04% of Ni,13-15% of Cr, 0.2-0.3% of Mo, 0.1-0.2% of Al, 0.02-0.04% of B, 0.02-0.04% of Ti, 0.04-0.06% of V, 0.01-0.03% of W, 0.01-0.02% of La, and the balance of Fe and inevitable impurities, wherein an expression that 0.5Cr-11.4Ni-8.5W-1.3Mn is greater than 4.2% and lower than 5.5% is met. The invention also discloses a preparation method of the medium-carbon high-chromium crack-resistant abrasion-proof steel ball. The medium-carbon high-chromium crack-resistant abrasion-proof steel ball disclosed by the invention is high in abrasion resistance and good in crack resistance.

Description

technical field [0001] The invention relates to the technical field of grinding machines, in particular to a medium-carbon high-chromium crack-resistant and wear-resistant steel ball and a preparation method thereof. Background technique [0002] Wear-resistant steel balls have been widely used in metallurgy, mineral processing, building materials, chemical industry, electric power and other industrial production. Wear-resistant steel balls are particularly prone to wear when grinding some hard substances, thereby shortening the service life of wear-resistant steel balls. At present, the content of chromium and carbon is usually increased to increase the wear resistance of steel balls. However, the increase of chromium and carbon content will reduce the plasticity of steel balls, making them easy to crack and brittle, thus limiting the application of wear-resistant steel balls. . Contents of the invention [0003] Based on the technical problems existing in the backgroun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/44C22C38/06C22C38/54C22C38/50C22C38/46C21D1/18B02C17/20
CPCC22C38/04B02C17/20C21D1/18C21D6/004C22C38/005C22C38/02C22C38/06C22C38/44C22C38/46C22C38/50C22C38/54
Inventor 吴水金
Owner 芜湖市永帆精密模具科技有限公司
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