Iron-based pre-alloyed powder prepared through recycled nickel and cobalt and preparing method

Abstract

The invention discloses iron-based pre-alloyed powder prepared through recycled nickel and cobalt and a preparing method. The powder is composed of iron, nickel, copper, cobalt and chromium according to a certain proportion. The method comprises the steps of firstly, component detection, wherein an artificial diamond wastewater chemical electrolytic recovery waste nickel and cobalt plate is analyzed, and the content of nickel and cobalt is determined; secondly, material preparing, wherein according to the detected nickel and cobalt content result, iron, nickel, copper, cobalt and chromium are calculated, and according to the total weight of graphite powder : metal, graphite powder is prepared; thirdly, water atomization powder making, wherein the prepared metal is placed in an intermediate frequency furnace, nitrogen is used for forming a gas curtain, air is isolated, after the mixed metal is molten, the graphite powder is added, and liquid metal is crushed and atomized into alloy powder through high-pressure water; fourthly, screening blending, wherein the prepared alloy powder is sieved, and is sufficiently blended in a mixing machine, and the pre-alloyed powder is obtained. The method is reasonable in formula, simple in production technology, low in powder oxygen content, uniform in granularity and good in cold pressing molding, and has the wide application prospect in diamond cutters and tool structural parts.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a method for preparing iron-based pre-alloyed powder from nickel and cobalt recovered from diamond synthesis rods. Background technique [0002] As we all know, China is the largest producer of synthetic diamonds in the world. In recent years, due to the rapid development of the global information industry, architectural decoration, oil drilling, etc., the demand for synthetic diamond and diamond products has grown rapidly, with an annual growth rate of 37%. As of the end of 2013, my country's synthetic diamond output reached 15.1 billion carats (1 carat = 0.2 grams), accounting for more than 90% of the world's total output. [0003] Synthetic diamond is formed by using about 60wt.% graphite and 40wt.% metal catalyst (called metal catalyst in the synthetic diamond industry) under high temperature and high pressure. The main component of the catalyst is from the previous Ni 70 ...

AI Technical Summary

Problems solved by technology

[0007] Another object of the present invention is to provide a kind of method that utilizes the nickel-cobalt that diamond composite rod reclaims to prepare iron-based pre-alloy powder, in this method, the nickel-cobalt that mainly reclaims with diamond composite rod is the source of nickel and cobalt in the powder, The preparation method is easy to operate and the operation is simple, which solves the problems of complex methods and high costs in the process of recycling nickel and cobalt recovered by electrolysis of diamond synthetic rods

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