TC bearing and its production method

A production method and bearing technology, applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of short service life, large friction resistance, poor erosion resistance, etc., to improve the wetting effect, reduce friction resistance, The effect of improving erosion resistance

Active Publication Date: 2014-04-09
天津市润博凯特石油机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing TC bearings are obtained by brazing and sintering molding of cemented carbide strips, cast tungsten carbide powder, and steel body in a furnace. The coverage rate of the cemented carbide i

Method used

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  • TC bearing and its production method
  • TC bearing and its production method

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Effect test

Embodiment 1

[0049] A TC bearing, comprising a cylindrical upper moving body 1 and a hard alloy wear-resistant layer 6 sintered on the outer surface of the upper moving body 1, the hard alloy wear-resistant layer 6 is made of hard alloy Spheroid 61, cast tungsten carbide powder and copper base alloy are sintered. Such as Figure 11 As shown, a mixture 62 of cast tungsten carbide powder and copper-based alloy is evenly sintered on the surface of cemented carbide pellets 61 and around adjacent cemented carbide pellets 61 .

[0050] Among them, the particle size of cemented carbide pellets is 0.5 mm, and the particle size of cast tungsten carbide powder is 100 mesh.

[0051] The production method of the TC bearing, the production method comprises the following steps:

[0052] (1) Preparation of steel sleeves: such as image 3 and Figure 4 As shown, the roughly processed 42CrMo pipe (upper body 1) and 20# steel pipe (upper carcass 2) are processed to the corresponding size according to th...

Embodiment 2

[0062] A TC bearing, comprising a cylindrical upper static sleeve body 7 and a hard alloy wear-resistant layer 6 sintered on the inner surface of the upper static sleeve body 7, the hard alloy wear-resistant layer 6 is composed of hard alloy It is made by sintering high-quality alloy pellets 61, cast tungsten carbide powder and copper-based alloy.

[0063] Among them, the particle size of cemented carbide pellets is 1.0 mm, and the particle size of cast tungsten carbide powder is 200 mesh.

[0064] The production method of the TC bearing, the production method comprises the following steps:

[0065] (1) Preparation of steel sleeves: such as Figure 7 and Figure 8 As shown, the roughly processed 42CrMo pipe (upper static sleeve body 7) and 20# steel pipe (upper static sleeve carcass 8) are processed to the corresponding size according to the drawing requirements, and the outer diameter of the upper static sleeve carcass 8 is smaller than that of the upper static sleeve. The...

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Abstract

The invention discloses a TC bearing and its production method. The TC bearing comprises a cylindrical body and a hard alloy wear resistant layer sintered on the inner surface or outer surface of the body. The hard alloy wear resistant layer is formed by sintering of hard alloy pellets, cast tungsten carbide powder and a copper based alloy. The TC bearing can prepared by the processes of steel jacket preparation, mixing, filling, vibration, furnace brazing, rough turning, coarse grinding, finish turning, and accurate grinding. The TC bearing provided by the invention uses hard alloy pellets to replace hard alloy strips, thus enhancing the coverage rate of the wear resistant layer up to more than 90%, greatly improving the erosion resistance of the product, and reducing the friction resistance. The service life of the TC bearing is up to 350-450 hours.

Description

technical field [0001] The invention belongs to the technical field of bearings, in particular to a TC bearing and a production method thereof. Background technique [0002] TC bearings, also known as cemented carbide radial bearings, are the main accessories for screw drilling tools used in oil development. Existing TC bearings are obtained by brazing and sintering molding of cemented carbide strips, cast tungsten carbide powder, and steel body in a furnace. The coverage rate of the cemented carbide is only 55-65%, and the product has poor erosion resistance and friction Large resistance and short service life. At present, the service life of ordinary TC bearings in China is only 150-200 hours. [0003] Therefore, it is of great practical significance to develop a new type of TC bearing with good erosion resistance, low frictional resistance and long service life. Contents of the invention [0004] In view of the above technical problems, the first problem to be solved ...

Claims

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Application Information

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IPC IPC(8): F16C33/06B23P15/00
Inventor 杨可成李增禄郭建齐
Owner 天津市润博凯特石油机械制造有限公司
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