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A thermal connection method for tungsten-cobalt cemented carbide products

A cemented carbide and thermal connection technology, which is applied in the field of powder metallurgy, can solve the problems of difficult size control, low pass rate of product processing, and inability to process, so as to expand the application field, conveniently guide engineering production, and reduce production difficulty and scrap rate. Effect

Active Publication Date: 2020-12-25
JINAN INSTITUTE OF METALLURGICAL SCIENCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex shape of various special-shaped products, it is very difficult to process and control the finished product. According to the existing production technology, there are problems such as low product processing pass rate, large material consumption, low efficiency, difficult size control or even impossible processing.

Method used

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  • A thermal connection method for tungsten-cobalt cemented carbide products
  • A thermal connection method for tungsten-cobalt cemented carbide products
  • A thermal connection method for tungsten-cobalt cemented carbide products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Pre-connect A1 and B1, calculate according to formulas (1)~(7) and measure with metallographic microscope, and detect the basic physical properties of alloy parts, as shown in Table 2.

[0067] Table 2

[0068]

[0069] For the surfaces that need to be connected to A1 and B1, use a surface grinder for grinding, the amount of each feed is 0.02mm, and the surface roughness after grinding is 0.167 microns; use 800 mesh and 2000 mesh diamond powder respectively to grind the grinding surface After polishing and grinding, the surface roughness of A1 is 0.074 microns, and the surface roughness of B1 is 0.088 microns.

[0070] According to the phase diagram, the heat treatment temperature for component A1 and component B1 to appear in liquid phase is 1320°C, and 1330°C is selected as the thermal connection temperature; put the two grinding surfaces together, put them in a vacuum furnace, heat to 1330°C, and keep warm Cool naturally after 60 minutes; cool to room temperature...

Embodiment 2

[0072] Pre-connect A2 and B2, calculate according to formulas (1)~(7) and measure with metallographic microscope, and detect the basic physical properties of the alloy, as shown in Table 3.

[0073] table 3

[0074]

[0075] The surface of parts A2 and B2 that need to be connected is ground with a surface grinder, with a feed rate of 0.02 mm each time, and the surface roughness after grinding is 0.134 microns; 800 mesh and 2000 mesh diamond powder are used respectively, and the grinding surface After polishing and grinding, the surface roughness of A2 is 0.068 microns, and the surface roughness of B2 is 0.061 microns.

[0076] According to the phase diagram, the heat treatment temperature for the liquid phase of component A2 and component B2 is 1320°C, and 1340°C is selected as the thermal connection temperature; put the two grinding surfaces together, put them in a vacuum furnace, heat to 1340°C, and keep warm Cool naturally after 60 minutes; cool to room temperature and ...

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Abstract

The invention discloses a thermal connection method for a tungsten-cobalt hard alloy product. The thermal connection method comprises the following steps of (1) producing a needed hard alloy connecting part according to different physical properties; (2) carrying out physical property detection and classified matching on the produced hard alloy connecting part; (3) carrying out surface roughness treatment on the surface of the hard alloy connecting part needed to be connected; (4) selecting a proper connecting temperature for thermal connecting treatment according to the physical property of amatched combination part; and (5) verifying a connecting effect of a small sample block.

Description

technical field [0001] The invention relates to a thermal connection method for tungsten-cobalt cemented carbide products, belonging to the field of powder metallurgy. Background technique [0002] Cemented carbide is a kind of superhard material, which is an alloy material made of hard compound of refractory metal and bonding metal through powder metallurgy process. Due to the advantages of powder metallurgy technology, it has become the key to solve the problems of new materials and plays a pivotal role in the development of new materials. [0003] Powder metallurgy is a process technology for producing metal powder or using metal powder (or a mixture of metal powder and non-metal powder) as raw material, forming and sintering to manufacture metal materials, composite materials and various types of products. [0004] Cemented carbide is a kind of superhard material produced by powder metallurgy process. It has a series of excellent properties such as high hardness, wear r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/06
CPCB22F7/062
Inventor 李辉邓丽芳王东洋郑君姿白家声
Owner JINAN INSTITUTE OF METALLURGICAL SCIENCE CO LTD