FIELD: powder metallurgy, namely production of powders of waste hard alloys.
SUBSTANCE: method comprises steps of subjecting hard-alloy scrap to heat treatment for producing sintered conglomerates; preliminarily crushing conglomerates by fragments and performing further crushing and wet grinding of them. Increased tensile strength of hard-alloy products is provided in the result of limited growth of carbide grains at sintering stage due to taking away excess carbon and lowered frangibility of binder. Crushing of fragments of sintered conglomerate and wet grinding of them are realized at presence of iron carbamide taken in quantity 0.3 - 1.0 mass %.
EFFECT: improved strength of products.
1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| HARD-ALLOY ARTICLE PRODUCTION METHOD | 2004 |
|
RU2264278C1 |
| METHOD OF PREPARATION OF HARD-ALLOY MIXTURES FROM USED HARD ALLOYS | 1998 |
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| METHOD OF PRODUCTION OF SINTERED HARD ALLOY ON BASE OF TUNGSTEN CARBIDE AND SINTERED HARD ALLOY PRODUCED BY MEANS OF THIS METHOD (VERSIONS) | 2006 |
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| CARBIDE ALLOY WITH A REDUCED CONTENT OF TUNGSTEN CARBIDE FOR THE MANUFACTURE OF CUTTING TOOLS AND A METHOD FOR ITS PRODUCTION | 2023 |
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| METHOD OF MANUFACTURE OF HARD-ALLOY ARTICLES AT VARYING MICRO-HARDNESS OF SURFACE LAYERS | 2000 |
|
RU2218448C2 |
| HARD ALLOY BORATING METHOD | 0 |
|
SU1727950A1 |
