Rare-earth-regulated water-atomized Fe-Cu pre-alloyed powder special for ultra-hard material products and preparation method of rare-earth-regulated water-atomized Fe-Cu pre-alloyed powder

Abstract

The invention provides rare-earth-regulated water-atomized Fe-Cu pre-alloyed powder special for ultra-hard material products and a preparation method of the rare-earth-regulated water-atomized Fe-Cu pre-alloyed powder. Ultrafine iron and copper pre-alloyed powder is produced and prepared through a high-temperature liquid-state smelting and high-pressure water atomization method, and even and mechanical mixtures of Fe-Cu atomic clusters are formed inside powder particles; and double-component Fe-Cu basic pre-alloyed powder is produced and prepared by mainly using Fe, using soft-phase Cu in an auxiliary manner and adding the brittle phase forming element P and refined-grain rare earth elements (Ce and Y). The performance requirements of the ultra-hard products of different types can be well met, hard and brittle mass points such as Fe3P and Cu2P can be formed inside the alloy powder particles through the element P, dispersion distribution is achieved, the brittleness wear resistance of powder sintering tissues is regulated, and the improvement of the sharpness of tools is facilitated; and rare earth elements Ce and Y can refine powder crystalline grains, can improve the compactness and bending strength of the powder sintering tissues and is beneficial to the improvement of the holding force, for diamond, of the sintering tissues.

Description

technical field [0001] The invention relates to the field of metal material powder metallurgy, in particular to a rare earth-adjusted water-atomized Fe-Cu prealloyed powder for superhard material products and a preparation method thereof. Background technique [0002] Traditional metal binders for superhard materials are divided into two categories: elemental metal powders and pre-alloyed powders. The elemental metal powder in developed countries of foreign products is mainly ultrafine elemental cobalt powder, supplemented by fine-grained carbonyl iron powder, carbonyl nickel powder and bronze powder; the pre-alloyed powder is mainly prepared by chemical co-precipitation. Cu-Co is the main material, and the material cost is expensive. At present, the metal binder of superhard material products in my country is still mainly used in the mechanical mixing application of traditional ordinary particle size Fe, Ni, Cu, Sn and other elemental metal powders. Fe and Cu are the most...

AI Technical Summary

Problems solved by technology

Fe and Cu are the most basic and most widely used powders. Among them, cheap iron powder is used the most, but its quality fluctuates the most, and has the greatest impact on the quality of products: there are many impurities, high oxygen content, and particle size distribution. There are many disadvantages such as large difference, poor wettability to diamond, insufficient holding force, poor sharpness, etc.

The second is electrolytic copper powder, which has problems such as coarse particle size, sintered structure segregation, insufficient wettability and holding force to diamond, etc.

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