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Treatment process for improving corrosion resistance of bearing

A treatment process and corrosion resistance technology, applied in the field of treatment process that can improve the corrosion resistance of bearings, can solve the problems of increasing the cost of bearing replacement and maintenance, affecting the normal operation of equipment, reducing the service life of bearings, etc., to reduce overheating sensitivity And temper brittleness, improve atmospheric corrosion resistance, and increase service life

Active Publication Date: 2014-12-10
南京创贝高速传动机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the use of bearings is more and more involved in many fields, but due to the strict requirements on the operating environment of bearings, long-term operation in harsh environments, such as environments with corrosive gases, will greatly reduce the service life of bearings. To the normal operation of the equipment, it also increases the cost of bearing replacement and maintenance, and hinders normal production, causing huge losses

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This embodiment provides a treatment process that can improve the corrosion resistance of the bearing, and the method is carried out according to the following steps:

[0040] Step (1): configure a nickel-chromium alloy coating, the weight percentage of the nickel-chromium alloy coating is: Nb: 0.24%, Ni: 48.8%, Cr: 28.6%, Si: 1.9%, S: 0.27%, C: 0.12%, Cu: 9%, W: 5.7%, rare earth: 3.3%, the balance is Fe;

[0041] Among the rare earths, the following components are included by weight percentage: Ce: 12.3%, Pr: 15.4%, Nd: 7.8%, Pm: 3.4%, Gd: 2.3%, Ac: 7%, Dy: 10.4%, Th: 3.4% , Tb: 15%, Er: 3.2%, and the balance is La;

[0042] Step (2): Send the bearing into the heating furnace to heat up to 1150°C, then use air cooling to cool the bearing to 530°C at a cooling rate of 16°C / s, and then spray the nickel-chromium alloy coating on the surface of the bearing with a thickness of 0.08mm, then put it into the heating furnace and quickly heat it to 1040°C, keep it warm for 30m...

Embodiment 2

[0047] This embodiment provides a treatment process that can improve the corrosion resistance of the bearing, and the method is carried out according to the following steps:

[0048] Step (1): configure the nickel-chromium alloy coating, the weight percentage composition of the nickel-chromium alloy coating is: Nb: 0.24%, Ni: 48.8%, Cr: 28.6%, Si: 1.9%, S: 0.27%, C: 0.12%, Cu: 9%, W: 5.7%, rare earth: 3.3%, the balance is Fe;

[0049] Among the rare earths, the following components are included by weight percentage: Ce: 12.3%, Pr: 15.4%, Nd: 7.8%, Pm: 3.4%, Gd: 2.3%, Ac: 7%, Dy: 10.4%, Th: 3.4% , Tb: 15%, Er: 3.2%, and the balance is La;

[0050] Step (2): Send the bearing into the heating furnace to heat up to 1150°C, then use air cooling to cool the bearing to 530°C at a cooling rate of 16°C / s, and then spray the nickel-chromium alloy coating on the surface of the bearing with a thickness of 0.08mm, then put it into the heating furnace and quickly heat it to 1040°C, keep i...

Embodiment 3

[0055] This embodiment provides a treatment process that can improve the corrosion resistance of the bearing, and the method is carried out according to the following steps:

[0056] Step (1): configure the nickel-chromium alloy coating, the weight percentage composition of the nickel-chromium alloy coating is: Nb: 0.25%, Ni: 48.9%, Cr: 29%, Si: 2.2%, S: 0.28%, C: 0.15%, Cu: 10%, W: 5.8%, rare earth: 3.5%, the balance is Fe;

[0057] Among the rare earths, the following components are included by weight percentage: Ce: 12.5%, Pr: 15.5%, Nd: 7.9%, Pm: 3.6%, Gd: 2.5%, Ac: 8%, Dy: 10.5%, Th: 3.5% , Tb: 16%, Er: 3.5%, and the balance is La;

[0058] Step (2): Put the bearing into the heating furnace and heat it to 1200°C, then use air cooling to cool the bearing to 550°C at a cooling rate of 17°C / s, and then spray the nickel-chromium alloy coating on the surface of the bearing with a thickness of 0.09mm, then put it into the heating furnace and heat it rapidly to 1050°C, keep it...

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Abstract

The invention discloses a treatment process for improving corrosion resistance of a bearing. The treatment process comprises the following steps: (1) preparing a nickel-chromium alloy coating; (2) feeding the bearing into a heating furnace, heating to 1100-1200 DEG C, rapidly cooling the bearing to be 520-550 DEG C through a first cooling procedure, spraying the nickel-chromium alloy coating on the surface of the bearing under the condition that the thickness is 0.06-0.09mm, putting the bearing into the hearting furnace, rapidly heating to be 1000-1050 DEG C, keeping the temperature for 30-35 minutes, and finally cooling to the room temperature through a second cooling procedure; (3) tempering the bearing; (4) performing normalization once, tempering once and surface high-frequency quenching once on the bearing; and (5) detecting the flaws by using ultrasonic waves, and washing and packaging after the bearing is qualified. By adopting the treatment process, the corrosion resistance of the bearing is improved, the oxidation resistance and wearing resistance of the bearing are also improved, and thus the service life of the bearing is prolonged.

Description

technical field [0001] The invention relates to a bearing, in particular to a treatment process capable of improving the corrosion resistance of the bearing. Background technique [0002] At present, the use of bearings is more and more involved in many fields, but due to the strict requirements on the operating environment of bearings, long-term operation in harsh environments, such as environments with corrosive gases, will greatly reduce the service life of bearings. To the normal operation of the equipment, it also increases the cost of bearing replacement and maintenance, and hinders normal production, causing huge losses. Contents of the invention [0003] The technical problem to be solved by the invention is: how to improve the corrosion resistance of the bearing, increase the service life of the bearing, reduce the cost and increase the wear resistance of the bearing at the same time. [0004] The technical scheme that the present invention solves above technical...

Claims

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Application Information

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IPC IPC(8): C23F17/00C23C4/12C23C4/08C21D9/00C22C19/05C22C30/00C21D9/40C23C4/06
Inventor 陆树根杨忠喜冯强龙
Owner 南京创贝高速传动机械有限公司
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