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Tungsten carbide hard face abrasion-resistant bearing and preparation method thereof

A wear-resistant bearing, tungsten carbide technology, applied in metal processing equipment, transportation and packaging, coating, etc., can solve the problems of wear failure, high friction coefficient, etc., to change the surface friction coefficient, control friction and wear performance, improve friction and wear performance effect

Inactive Publication Date: 2019-03-15
SEED TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above-mentioned existing tungsten carbide hard-faced wear-resistant bearings have the following problems: the coefficient of friction is still high, resulting in severe wear and tear failure

Method used

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  • Tungsten carbide hard face abrasion-resistant bearing and preparation method thereof
  • Tungsten carbide hard face abrasion-resistant bearing and preparation method thereof
  • Tungsten carbide hard face abrasion-resistant bearing and preparation method thereof

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preparation example Construction

[0036] The present application also provides a preparation method of the tungsten carbide hard-faced wear-resistant bearing, comprising the following steps:

[0037] Mix 20% to 55% of pure nickel powder or nickel-based alloy powder, 2.5% to 15% of self-lubricating component powder, and 30% to 77.5% of tungsten carbide particles according to volume percentage to obtain a mixed powder; the self-lubricating The component is a composite material of nickel-coated molybdenum disulfide or a composite material of nickel-coated graphite;

[0038] The mixed powder is molded on the cemented carbide to obtain a tungsten carbide hard surface wear-resistant bearing.

[0039] According to the present invention, pure nickel powder or nickel-based alloy powder, self-lubricating component powder and tungsten carbide particles are mixed according to the volume percentage; among the above-mentioned components, the particle size of self-lubricating component powder is 30-180 μm, and in specific im...

Embodiment 1

[0044] Ni-(4-20)Cr-(1-10)Si-( 0.5-5) B nickel-based alloy powder and spherical cast tungsten carbide with a particle diameter of 100-150 μm and a volume fraction of 40% are mixed to obtain a mixed powder. The above-mentioned mixed powder is surfacing welded on the cemented carbide through PTA to obtain a tungsten carbide hard-faced wear-resistant bearing. The hard-faced wear-resistant layer obtained by mixing the powder according to this ratio is defined as HF-01.

Embodiment 2

[0046] Ni-(4-20)Cr-(1-10)Si-( 0.5-5) B nickel-based alloy powder and spherical cast tungsten carbide with a particle diameter of 100-150 μm and a volume fraction of 40% are mixed to obtain a mixed powder. The above mixed powder is surfacing welded on the cemented carbide through PTA to obtain a tungsten carbide hard-faced wear-resistant bearing. The hard-faced wear-resistant layer obtained by mixing the powder according to this ratio is defined as HF-02.

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Abstract

The invention provides a tungsten carbide hard face abrasion-resistant bearing. The tungsten carbide hard face abrasion-resistant bearing is composed of a hard alloy and a coating distributed on the periphery of the hard alloy; the coating is prepared from the following components, by volume percentage, 20%-55% of pure nickel or a nickel-based alloy, 2.5%-15% of a self-lubricating component, and 30%-77.5% of tungsten carbide particles; and the self-lubricating component is a nickel-coated molybdenum disulfide composite material or a nickel-coated graphite composite material. The invention further provides a preparation method of the tungsten carbide hard face abrasion-resistant bearing. According to the provided tungsten carbide hard face abrasion-resistant bearing, due to the existence ofthe lubricating component (such as graphite) in the coating, the friction coefficient of the surface of the hard face is lowered, and the abrasion performance can be effectively improved; and the lubricating component such as graphite is in three-dimensional uniform distribution, and can uninterruptedly occur on the new formed surface under the condition of initial surface abrasion, and thereforea self-lubricating effect is achieved.

Description

technical field [0001] The invention relates to the technical field of bearing materials, in particular to a tungsten carbide hard surface wear-resistant bearing and a preparation method thereof. Background technique [0002] Tungsten carbide hard faced anti-friction bearings are high performance bearings widely used in industry. The high hardness and wear resistance of tungsten carbide make the bearings containing tungsten carbide on the surface particularly prominent in high-load oil and gas drilling. [0003] At present, tungsten carbide hard-faced wear-resistant bearings are generally inlaid cemented carbide blocks and composite materials (such as figure 1 ). The tungsten carbide hard-faced wear-resistant bearing in the figure includes cemented carbide block, cast tungsten carbide particles and nickel-based alloy adhesive; among them, the selection of nickel-based alloy adhesive is due to the high strength of nickel and nickel alloy, and steel The affinity of the matr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/08B22F1/02B22F3/105C22C19/05C22C29/08
CPCC22C19/057C22C29/067C22C29/08B22F3/105B22F7/08B22F1/105B22F1/17
Inventor 徐跃华
Owner SEED TECH CORP LTD
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