A kind of cemented carbide strip/block and its bonding method suitable for cemented carbide hard surface processing

A hard alloy, one-sided technology, applied in metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problems of hard alloy strip/block cracks, uneven thickness of brazing layer, and many welding pores, etc., to achieve uniform thickness , increase the thickness, reduce the effect of porosity

Active Publication Date: 2021-08-27
株洲金韦硬质合金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small gap between the two planes, the thickness of the brazing layer is uneven, and in some places the brazing layer is leaked, and there are many welding pores, and what's more, the brazing material is not filled in place, resulting in local desoldering; Furthermore, due to the difference in thermal expansion coefficient between cemented carbide and alloy steel, welded products produce high residual stress. The longer the cemented carbide strip / block, the finer the WC grain size, and the greater the residual stress generated, resulting in Cracks occur in the middle of the carbide strip / block, causing the product to be scrapped

Method used

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  • A kind of cemented carbide strip/block and its bonding method suitable for cemented carbide hard surface processing
  • A kind of cemented carbide strip/block and its bonding method suitable for cemented carbide hard surface processing
  • A kind of cemented carbide strip/block and its bonding method suitable for cemented carbide hard surface processing

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Embodiment 1

[0037] This embodiment provides a hard alloy strip / block suitable for hard alloy hard surface processed, hard alloy bar / block is a long bar shape, and the long rough hard alloy bar provided in this embodiment can be applied to screw drill. Tools, various large and medium-sized mechanics of drill rods and drilling tools, TC bearings on screw drills and various hardening occasions.

[0038] The hard alloy strip / block includes a plurality of support columns 2 integrally formed with the body 1, and the plurality of support columns 2 are disposed on the contact surface of the hard alloy strip / block and the steel matrix, the shape of the support column 2 can be Any one of a cone shape, semi-cylindrical, hemispherical, long strip, wedge or cross, in order to effectively reduce the contact area of ​​the support post 2 and the steel matrix, facilitate the flow of brazing in the molten state, EXAMPLES The shape of the support post 2 is a cone shape, and the support post 2 includes a...

Embodiment 2

[0055] This embodiment also provides a hard alloy bar / block suitable for hard alloy hard alloy, and is different from the first embodiment, and the hard alloy bar / block of the present embodiment is a circular shape, according to this The shape of the hard alloy bar / block of the embodiment can be uniformly disposed on the same circumference according to the size of the hard alloy bar / block, and the size of the circumferential hard alloy block in the present embodiment is sized. See Table 2, according to Table 2, the size of the wafer-shaped hard alloy block of the TC bearing and the armor alloy member according to Table 2 can be uniformly set at least 6 in the same circumference of the wafer-shaped hard alloy block provided in this example. A support column, the number of support columns is preferably 6; the support column is evenly distributed over the same circumference of the wafer-shaped hard alloy block, which is advantageous to uniformly distribute the residual stress...

Embodiment 3

[0060] This embodiment also provides a hard alloy strip / block suitable for hard alloy hard surface, and is different from that of Example 1, the hard alloy strip / block of the present embodiment is a positive hexagon, according to this The shape of the hard alloy bar / block of the embodiment can be uniformly disposed on the same circumference in the same circumference according to the size of the hard alloy strip / block, and the size of the positive hexagonal hard alloy block in the present embodiment. In view of Table 3, according to Table 3, it should be used in the size of the hard alloy block of the TC bearing and the armor alloy member, and at least 6 support columns can be uniformly disposed on the same circumference of the positive hexagonal hard alloy block provided in this embodiment. The number of support columns is preferably 6; the support column is uniformly distributed over the same circumference of the positive hexagonal hard alloy block, which is advantageous ...

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Abstract

The invention relates to the technical field of cemented carbide material manufacturing, and discloses a cemented carbide strip / block suitable for processing cemented carbide hard surfaces and a bonding method thereof. The cemented carbide strip / block includes a body and is integrated with the body Formed multiple support columns, the plurality of support columns are arranged on the contact surface between the cemented carbide strip / block and the steel substrate; the height of the support columns is 0.2-0.5 mm. The present invention innovatively designs and processes a plurality of support columns on the existing cemented carbide strips / blocks as a buffer layer to increase the welding area and welding strength, and appropriately increases the thickness of the brazing layer so that the cemented carbide strips / Block better release and relieve residual stress, and at the same time ensure the uniform thickness of the brazing layer, increase the fluidity of the brazing material in the molten state, reduce the phenomenon of pores and desoldering, and improve the welding strength.

Description

Technical field [0001] The present invention relates to the manufacturing techniques of cemented carbide materials, and more particularly to a hard alloy bar / block and its bonding method suitable for hard alloy hard surface processing. Background technique [0002] Mining drill or screw drill is a driving force for drilling fluid to transfer liquid pressure into mechanical energy, and play an important role in drilling. The armor and TC bearings (radial bearing) are important components of the drill, such as TC bearings that withstand the lateral force generated by the drill bit and the drive shaft in the screw drill, the Tc radial bearing is affecting the drill drill Key components of service life. [0003] The surface of the support and TC bearing needs to be welded or sintered to improve the wear resistance of TC bearings. At present, the brazing of hard alloy bars and steel is still placed directly on the metal surface and solder between the two planes. In the TC bearing an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/00B23K1/19B23K5/00
CPCB23K1/00B23K1/19B23K5/00
Inventor 汪文斋刘能文李世杰
Owner 株洲金韦硬质合金有限公司
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