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Large scale hard alloy butting joint process

A cemented carbide, large-size technology, applied in the field of large-size cemented carbide docking process, can solve the problem that large-size cemented carbide products cannot be fired, and achieve the effect of solving sintering

Inactive Publication Date: 2015-03-25
ZHEJIANG HENGCHENG CEMENTED CARBIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a large-size cemented carbide butt joint process, which can effectively solve the problem that existing large-size cemented carbide products cannot be fired

Method used

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  • Large scale hard alloy butting joint process
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Embodiment Construction

[0014] refer to figure 1 , figure 2 It is an embodiment of the large-size cemented carbide butt joint process of the present invention, and the large-size cemented carbide butt joint process includes the following steps in turn:

[0015] A. According to the size of the original to be processed, it is divided into two or three sections and fired into cemented carbide blanks. The firing process is fired according to the existing public carbide firing technology, and the diameter of adjacent blanks differs by 0.5 ~1mm;

[0016] B. Process adjacent blanks to a parallelism of 0.01mm, a flatness of 0.005mm, and a surface roughness of 0.02 microns;

[0017] C. Using the diameter difference of adjacent blanks, apply metal glue on the connection of two adjacent blanks, and then put them back into the furnace for sintering;

[0018] D. During vacuum sintering, the temperature is uniformly raised to 680-720°C and the pressure is 0.5MPa within 2 hours; then the temperature is kept for...

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Abstract

The invention discloses a large scale hard alloy butting joint process which sequentially comprises the following steps that a material is divided into two sections or three sections and to be manufactured into hard alloy blanks in a burning mode according to the size of a component needing to be machined, and the diameter difference of every two adjacent blanks is 0.5-1mm; the butt joint faces of every two adjacent blanks are machined to meet the specific requirements; the connection portion of every two two adjacent blanks is coated with metal glue, and then the blanks are placed in a furnace for sintering; the temperature evenly raises to 680-720 DEG C in two hours during vacuum sintering, and the pressure is 0.5MPa; the temperature is kept for one hour; then the temperature evenly raises to 1180-1220 DEG C after three hours; the temperature is kept for two hours; then the temperature evenly raises to 1380-1420 DEG C after five hours, and the pressure raises to 2MPa after the temperature raises for one hour; then the pressure raises to 6MPa after the temperature is kept for two hours; finally, the temperature and the pressure are reduced to normal temperature and normal pressure in eleven hours, sintering is finished, and the blanks are machined to the required size. The process has the advantage that hard alloy products machined through the method can reach performance parameters of one-time sintered products.

Description

technical field [0001] The invention relates to a large-size cemented carbide butt joint process. Background technique [0002] Due to the influence of the size of the firing kiln, the existing large-size cemented carbide products mainly refer to products with a height exceeding 600mm, which cannot be fired. Contents of the invention [0003] The purpose of the present invention is to provide a large-size hard alloy butt joint process, which can effectively solve the problem that existing large-size hard alloy products cannot be fired. [0004] In order to solve the above-mentioned technical problems, the present invention is achieved through the following technical proposals: large-size cemented carbide butt jointing process, including the following steps in turn: [0005] A. According to the size of the original to be processed, it is divided into two or three sections and fired into cemented carbide blanks, and the diameter difference between adjacent blanks is 0.5-1mm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/06
Inventor 郭伟波黄椿金益民吴晓娜
Owner ZHEJIANG HENGCHENG CEMENTED CARBIDE
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