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Anti-fatigue low-carbon high-chromium steel ball

A high-chromium steel ball, low-carbon and high-chromium technology, applied in coating, furnace type, furnace, etc., can solve the problems of low fatigue resistance, crack resistance, poor anti-falling fatigue performance, low toughness, etc., to achieve Effects of increasing strength, reducing notch sensitivity, and increasing hardness

Inactive Publication Date: 2017-08-04
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

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Problems solved by technology

[0002] High chromium steel balls have high hardness and wear resistance, but their toughness is low, and their crack resistance, shedding resistance, and fatigue resistance are not good. The toughness of steel balls can be increased by reducing the carbon content, but their fatigue resistance remains the same. Therefore, it is necessary to provide a new low-carbon high-chromium steel ball to increase its fatigue resistance and increase its service life

Method used

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  • Anti-fatigue low-carbon high-chromium steel ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An anti-fatigue low-carbon high-chromium steel ball, the weight percentage of each component is as follows: C: 0.17%, Cr: 14%, V: 0.35%, Co: 0.55%, W: 0.1%, Si: 0.25%, Mn: 0.3%, Mo: 1.1%, S≤0.015%, P≤0.015%, Ni: 0.6%, and the balance is Fe.

Embodiment 2

[0020] An anti-fatigue low-carbon high-chromium steel ball, the weight percentage of each component is as follows: C: 0.15%, Cr: 15%, V: 0.3%, Co: 0.6%, W: 0.05%, Si: 0.3%, Mn: 0.2%, Mo: 1.2%, S≤0.015%, P≤0.015%, Ni: 0.8%, the remainder is Fe;

[0021] In the preparation process of anti-fatigue low-carbon high-chromium steel balls, scrap steel is smelted, carbon, chromium, vanadium, cobalt, nickel, tungsten, silicon, manganese, molybdenum are added, rough smelted, refined, cast out of the furnace to obtain a spherical shape that meets the above components Ingot casting, wherein the casting temperature is 1400°C; take a spherical ingot, heat it up to 950°C, keep it warm for 50 minutes, cool it down to room temperature at a speed of 3.5°C / s, then raise the temperature to 520°C, hold it for 6 hours, polish and clean it Process to obtain the intermediate ingot; take the intermediate ingot and heat it up to 560°C in an ammonia atmosphere, hold it for 32 hours and then cool it to ro...

Embodiment 3

[0023] An anti-fatigue low-carbon high-chromium steel ball, the weight percentage of each component is as follows: C: 0.2%, Cr: 13%, V: 0.4%, Co: 0.5%, W: 0.15%, Si: 0.2%, Mn: 0.4%, Mo: 1%, S≤0.015%, P≤0.015%, Ni: 0.55%, the remainder is Fe;

[0024] In the preparation process of anti-fatigue low-carbon high-chromium steel balls, scrap steel is smelted, carbon, chromium, vanadium, cobalt, nickel, tungsten, silicon, manganese, molybdenum are added, rough smelted, refined, cast out of the furnace to obtain a spherical shape that meets the above components Ingot casting, wherein the casting temperature is 1440°C; take a spherical ingot, heat it up to 900°C, keep it warm for 70 minutes, cool it down to room temperature at a rate of 2.5°C / s, then raise the temperature to 540°C, hold it for 4 hours, polish and clean Process to obtain the intermediate ingot; take the intermediate ingot and heat it up to 580°C in an ammonia atmosphere, hold it for 28 hours and then cool it to room tem...

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Abstract

The invention discloses an anti-fatigue low-carbon high-chromium steel ball. The anti-fatigue low-carbon high-chromium steel ball comprises the following components by weight percent: 0.15% to 0.2% of C, 13% to 15% of Cr, 0.3% to 0.4% of V, 0.5% to 0.6% of Co, 0.05% to 0.15% of W, 0.2% to 0.3% of Si, 0.2% to 0.4% of Mn, 1% to 1.2% of Mo, 0.015% or less of S, 0.015% or less of P, and Ni, and the balance being Fe, wherein Ni weight percent is larger than 0.4% and is smaller than (Mo weight percent-V weight percent). The anti-fatigue low-carbon high-chromium steel ball is good in fatigue resistance, good in toughness and high in strength.

Description

technical field [0001] The invention relates to the technical field of steel balls, in particular to an anti-fatigue low-carbon high-chromium steel ball. Background technique [0002] High chromium steel balls have high hardness and wear resistance, but their toughness is low, and their crack resistance, shedding resistance, and fatigue resistance are not good. The toughness of steel balls can be increased by reducing the carbon content, but their fatigue resistance remains the same. Therefore, it is necessary to provide a new low-carbon high-chromium steel ball to increase its fatigue resistance and increase its service life. Contents of the invention [0003] Based on the technical problems in the background technology, the present invention proposes an anti-fatigue low-carbon high-chromium steel ball, which has good fatigue resistance, good toughness and high strength. [0004] An anti-fatigue low-carbon high-chromium steel ball proposed by the present invention has th...

Claims

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Application Information

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IPC IPC(8): C22C38/46C22C38/52C22C38/44C22C38/02C22C38/04C23C8/26C21D1/18C21D9/36
CPCC21D1/18C21D9/36C21D2211/001C21D2211/008C22C38/02C22C38/04C22C38/44C22C38/46C22C38/52C23C8/26
Inventor 吴水金
Owner 芜湖市永帆精密模具科技有限公司
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