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Method of producing hard alloy rotatable special-shaped blade

A cemented carbide, special-shaped technology, applied in the field of powder metallurgy, to achieve the effect of reducing the operation process, keeping the shape intact, and avoiding secondary oxidation

Inactive Publication Date: 2009-07-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few occasions where it is really successfully used to prepare high-performance cemented carbide inserts, and no reports have been seen.

Method used

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  • Method of producing hard alloy rotatable special-shaped blade
  • Method of producing hard alloy rotatable special-shaped blade
  • Method of producing hard alloy rotatable special-shaped blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Weigh the mass of each binder component according to the mass percentage ratio (take 100g binder as an example):

[0020]

[0021] Mix each component on the internal mixer to form a uniform color mixture, which is the binder used;

[0022] (2) Weigh 2000g of WC-6Co cemented carbide powder and 98.5g of binder according to the powder volume loading (such as 55%), and mix the powder and binder for 2 hours in an internal mixer to prepare a well-mixed feeding;

[0023] (3) Inject the feed material on the injection machine to produce the injection blank of the indexable special-shaped blade. During the injection process, the injection temperature is 120°C, the injection pressure / holding pressure is 110MPa, the injection time is 2 seconds, and the holding time is 0.5 seconds, the injection speed (flow rate) is 50%, and the storage position is 10.00mm;

[0024] (4) Solvent degreasing the injection billet in solvent gasoline, the degreasing temperature is 35°C, and the ...

Embodiment 2

[0030] (1) Weigh the mass of each binder component according to the mass percentage ratio (take 100g binder as an example):

[0031]

[0032] Mix each component on the internal mixer to form a uniform color mixture, which is the binder used;

[0033] (2) Weigh 2000g of WC-10Co cemented carbide powder and 98.5g of binder according to the powder volume loading (such as 51%), mix the powder and binder in an internal mixer for 1h, and prepare a well-mixed feeding;

[0034] (3) Inject the feed material on the injection machine to produce an indexable special-shaped blade injection blank;

[0035] (6) Solvent degreasing the injection billet in solvent gasoline, the degreasing temperature is 26°C, and the degreasing time is 16h;

[0036] (7) Thermally degreasing and sintering the solvent degreasing billet in a thermal degreasing + sintering integrated furnace, and the thermal degreasing + sintering process is specifically as follows:

[0037]

[0038]

[0039] (6) Perform...

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Abstract

The invention relates to a WC-Co cemented carbide indexable special-shaped blade prepared by powder injection molding, which is characterized in that WC-Co mixed powder and a wax-oil-low molecular coupling agent-high molecular polymer composition The multi-component binder is mixed to prepare a uniform feed, and the feed is injected on the injection machine to produce an indexable special-shaped blade injection blank, and the injection blank is solvent-degreased in a solvent to control the solvent degreasing rate in the range of 45% to 65%. In the end, the solvent degreasing billet is finally subjected to a one-step thermal degreasing + sintering process. The prepared indexable special-shaped insert has high mechanical properties, and its bending strength is higher than that of the alloy prepared by the ordinary molding method, which can meet the production requirements. At the same time, the size deviation of the product is within Within ±0.5%.

Description

Technical field: [0001] The invention relates to the field of powder metallurgy, in particular to a method for preparing cemented carbide indexable special-shaped blades by adopting a powder metallurgy near net shape method. Background technique: [0002] Cemented carbide has a series of advantages such as high strength, high hardness, wear resistance and corrosion resistance, and is an indispensable structural material and tool material in national economy and national defense construction. But its high strength and high hardness also make it very difficult to process itself. At present, compression molding can only produce simple cemented carbide inserts with specifications and shapes. It is very difficult to produce special-shaped inserts with complex shapes, which usually requires follow-up processing, and the difficult follow-up processing will undoubtedly increase the production cost of the product. Powder injection molding is a new powder metallurgy near-net forming ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/22
Inventor 范景莲成会朝周红翠姚学详田家敏
Owner CENT SOUTH UNIV
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