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High-chromium anti-crack wearable steel balls and preparation method thereof

A wear-resistant steel and high-chromium technology, which is applied in the field of high-chromium crack-resistant and wear-resistant steel balls and its preparation, can solve the problems of reducing the toughness of steel balls, reducing the service life of steel balls, and easily breaking steel balls.

Inactive Publication Date: 2017-06-20
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

During the use of wear-resistant steel balls, the chromium content is usually increased to increase the wear resistance, corrosion resistance, hardness and other properties of the steel balls. However, if the chromium content is too high, the toughness of the steel balls will be reduced, and the steel balls are fragile. Cracks reduce the service life of steel balls, so it is necessary to provide a wear-resistant steel ball with high toughness and crack resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A high-chromium crack-resistant and wear-resistant steel ball, the weight percentage of each component is as follows: C: 0.2%, Si: 1.8%, Mn: 1.2%, Ni: 0.08%, Cr: 14%, Mo: 0.17%, Al: 0.15%, Cu: 0.2%, B: 0.015%, Ti: 0.06%, Nb: 0.4%, and the remainder is Fe.

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

[0020] S1. Casting: smelting scrap steel, adding carbon, silicon, manganese, nickel, chromium, molybdenum, aluminum, copper, boron, titanium, niobium to refining, casting out of the furnace, air cooling to obtain spherical castings meeting the above range;

[0021] S2. Heat treatment: Take the spherical casting obtained in S1, raise the temperature to 1200°C, keep it warm for 3.5 hours, quench it with water, cool it to room temperature, raise the temperature to 764°C, anneal for 75 minutes once, cool to room temperature, then raise the temperature to 600°C, and do the secon...

Embodiment 2

[0023] A high-chromium crack-resistant and wear-resistant steel ball, the weight percentage of each component is as follows: C: 0.15%, Si: 2%, Mn: 1%, Ni: 0.1%, Cr: 13%, Mo: 0.2%, Al: 0.1%, Cu: 0.3%, B: 0.01%, Ti: 0.07%, Nb: 0.3%, and the remainder is Fe.

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

[0025] S1. Casting: smelting scrap steel, adding carbon, silicon, manganese, nickel, chromium, molybdenum, aluminum, copper, boron, titanium, niobium to refining, casting out of the furnace, air cooling to obtain spherical castings meeting the above range;

[0026] S2. Heat treatment: Take the spherical casting obtained in S1, raise the temperature to 1300°C, keep it warm for 3 hours, quench it with water, cool it to room temperature at a rate of 5°C / s, raise the temperature to 703°C, anneal for 60 minutes once, cool to room temperature, and then raise the temperature To 620°C, s...

Embodiment 3

[0028] A high-chromium crack-resistant and wear-resistant steel ball, the weight percentage of each component is as follows: C: 0.25%, Si: 1.5%, Mn: 1.4%, Ni: 0.05%, Cr: 15%, Mo: 0.15%, Al: 0.2%, Cu: 0.1%, B: 0.02%, Ti: 0.05%, Nb: 0.5%, and the remainder is Fe.

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

[0030] S1. Casting: smelting scrap steel, adding carbon, silicon, manganese, nickel, chromium, molybdenum, aluminum, copper, boron, titanium, niobium to refining, casting out of the furnace, air cooling to obtain spherical castings meeting the above range;

[0031] S2. Heat treatment: Take the spherical casting obtained in S1, raise the temperature to 1100°C, keep it warm for 4 hours, quench it with water, cool it to room temperature at a rate of 3°C / s, raise the temperature to 825°C, anneal for 90 minutes once, cool to room temperature, and then raise the temperature To 58...

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Abstract

The invention discloses high-chromium anti-crack wearable steel balls which comprise the following components in percentage by weight: 0.15-0.25% of C, 1.5-2% of Si, 1-1.4% of Mn, 0.05-0.1% of Ni, 13-15% of Cr, 0.15-0.2% of Mo, 0.1-0.2% of Al, 0.1-0.3% of Cu, 0.01-0.02% of B, 0.05-0.07% of Ti, 0.3-0 .5% of Nb and the balance of Fe, wherein the expression that Mn plus 9.7Ni plus 13.4Ti is greater than 2% and smaller than 3.2% is met. The invention further discloses a preparation method of the high-chromium anti-crack wearable steel balls. Through the element interaction in conjunction with the limitation on a proper annealing temperature and time, the steel balls can maintain a high hardness, high strength and corrosion resistance while having a good toughness and impact resistance, and can also be prevented from fracture.

Description

technical field [0001] The invention relates to the technical field of grinding machines, in particular to a 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. During the use of wear-resistant steel balls, the chromium content is usually increased to increase the wear resistance, corrosion resistance, hardness and other properties of the steel balls. However, if the chromium content is too high, the toughness of the steel balls will be reduced, and the steel balls are fragile. Cracks reduce the service life of steel balls, so a high toughness, crack-resistant wear-resistant steel ball is required. Contents of the invention [0003] Based on the technical problems in the background technology, the present invention proposes a high-ch...

Claims

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Application Information

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IPC IPC(8): C22C38/44C22C38/42C22C38/54C22C38/50C22C38/48C22C38/06C22C33/04C21D6/00
CPCC22C38/44C21D6/004C21D6/005C21D6/008C22C33/04C22C38/06C22C38/42C22C38/48C22C38/50C22C38/54
Inventor 吴水金
Owner 芜湖市永帆精密模具科技有限公司
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