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Regeneration method of waste high-cobalt coarse-grain hard alloy

A cemented carbide and high-cobalt technology, which is applied in the regeneration field of waste high-cobalt coarse-grained cemented carbide, can solve the problems of easy introduction of impurities, high crushing difficulty, and high crushing energy consumption, so as to reduce the crushing difficulty and reduce the crushing energy consumption. , the effect of simplifying the preparation process

Active Publication Date: 2020-08-25
JIANGXI UNIV OF SCI & TECH +2
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome the deficiencies of the prior art, and provide a regeneration method suitable for waste high-cobalt coarse-grained hard alloys, so as to at least solve the problems of high crushing energy consumption, The technical problems of difficult crushing and easy introduction of impurities

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Embodiment 1

[0038] A kind of regeneration method of waste high-cobalt coarse-grained cemented carbide of the present invention, schematic flow sheet is as figure 1 As shown, the specific process is as follows:

[0039] (1) In the sintering furnace, the waste high-cobalt coarse-grained hard alloy block (photo as figure 2 As shown, the Co content in the cemented carbide is 20wt%, the balance is WC, and the grain size of WC is 1.6 μm) embedded in the alumina powder with a grain size of 0.1 mm, and the sintering furnace is evacuated and heated to 1550 ° C, and kept 1h, obtain the waste high-cobalt coarse-grained hard alloy of calcining treatment, the photo is as image 3 As shown, the microstructure of scrap alloy after sintering is loose;

[0040] (2) Cleaning the surface of the waste high-cobalt coarse-grained cemented carbide after the calcining treatment in step (1), crushing it with a jaw crusher for 20 minutes, and passing through a 100-mesh sieve to obtain waste alloy powder with a ...

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Abstract

The invention discloses a regeneration method of a waste high-cobalt coarse-grain hard alloy. The regeneration method comprises the following steps that (1) the waste high-cobalt coarse-grain hard alloy is buried into a decarburization filler, and the calcination treatment is carried out in a decarburization atmosphere; the decarburization filler is one or two of aluminum oxide and magnesium oxide; (2) the waste hard alloy subjected to the calcination treatment in the step 1 is crushed and sieved, and waste hard alloy powder is obtained; and (3) Co powder and C powder are added into the wastehard alloy powder obtained in the step (2) according to the structure and components of a regenerated alloy, the Co powder, the and C powder and the waste hard alloy powder are uniformly mixed, the granulation, pressing and sintering are carried out to obtain the regenerated hard alloy. According to the regeneration method of the waste high-cobalt coarse-grain hard alloy, the high-cobalt hard alloy is embedded into the aluminum oxide and / or magnesium oxide particles and sintered in the decarburization protective atmosphere, a brittle eta-phase structure is easily formed, and an eta-phase wastealloy structure is loose and easy to crush, so that the crushing energy consumption and the crushing difficulty of the high-cobalt hard alloy are reduced.

Description

technical field [0001] The invention relates to a regeneration method of waste hard alloy, in particular to a regeneration method of waste high-cobalt coarse-grained hard alloy which is difficult to handle. Background technique [0002] Cemented carbide has high strength, high hardness, high wear resistance and high red hardness, and is widely used as cutting tools, mining tools and wear-resistant parts. Cemented carbide materials are mainly composed of hard phase WC and binder phase Co metal, wherein the hard phase WC mainly provides the wear resistance and hardness of the material, and the binder phase Co mainly provides the fracture toughness of the material. The rare and precious metal tungsten and rare metal cobalt are recognized as extremely important strategic elements in the world. Therefore, the recycling and reuse of tungsten and cobalt elements has been a research field that has attracted much attention in this industry for many years. For some products that requ...

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Application Information

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IPC IPC(8): C22C29/08C22C29/10C22C1/05B22F9/04
CPCB22F9/04B22F2009/043C22C1/055C22C29/08C22C29/10
Inventor 吕健杜勇章秋霖吴杰阚高辉
Owner JIANGXI UNIV OF SCI & TECH
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