Method for preparing prealloy powder for low-oxygen-content micro-diamond product and using ultrahigh-pressure water atomization

A technology of pre-alloyed powder and low oxygen content is applied in the field of ultra-high pressure water atomization to prepare pre-alloyed powder for fine diamond products with low oxygen content. Eliminate the effect of component segregation and uniformity of components

Inactive Publication Date: 2013-04-24
HUNAN METALLURGY MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the past ten years, the new technology of diamond products has developed rapidly. The diamond product industry has put forward higher and stricter requirements for matrix powder materials. It is in urgent need of low oxygen content, fine particle size, uniform composition without segregation, and controllable particle shape. High-performance pre-alloyed powder raw materials, pre-alloyed powders prepared by the current conventional atomization process and other processes are increasingly difficult to meet the needs of the development of the diamond product industry

Method used

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  • Method for preparing prealloy powder for low-oxygen-content micro-diamond product and using ultrahigh-pressure water atomization
  • Method for preparing prealloy powder for low-oxygen-content micro-diamond product and using ultrahigh-pressure water atomization
  • Method for preparing prealloy powder for low-oxygen-content micro-diamond product and using ultrahigh-pressure water atomization

Examples

Experimental program
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Effect test

Embodiment 1

[0026] By weight percentage, the ingredients are Cu: 60%, Sn: 5%, Zn: 5%, Fe: 24%, Ti: 2%, Cr: 2%, Ce: 2%. Weigh 100 kg, put it into an intermediate frequency melting furnace to raise the temperature, and wait until the alloy raw material is melted and overheated at 150°C. Pour the molten metal into the leaky crucible, when the molten metal passes through the ceramic leakage hole at the bottom of the leaky bag and flows through the atomizing nozzle, control the jet water pressure: 55-60MPa, and the ratio of water flow to metal flow: 5.0-5.2 , the process cooling rate is: 10 4 ~10 5 K / s, the swirl angle range of the water jet is: 0.60~0.65rad, the liquid metal is crushed into small droplets by the ultra-high pressure water flow ejected from the nozzle, and then the pre-alloyed droplets are solidified into powder in the water of the atomization collection bucket. After being treated with TZYJ corrosion inhibitor with a concentration of 0.4%, the powder is dried at a temperatur...

Embodiment 2

[0029] In terms of weight percentage, the ingredients are Cu: 30%, Fe: 55%, Sn: 6%, Zn: 6%. Ce: 3%, weighing 100 kg, adding to the intermediate frequency melting furnace to raise the temperature, until the alloy raw materials are melted and overheated at 80-100°C. Pour the molten metal into the leaky crucible. When the molten metal passes through the ceramic leak hole at the bottom of the leaky bag and flows through the atomizing nozzle, control the jet water pressure: 65~70MPa, and the ratio of water flow to metal flow: 5.4~5.5 , the process cooling rate is: 10 4 ~10 6 K / s, the swirling angle range of the water jet is: 0.40~0.45rad, the liquid metal is crushed into small droplets by the ultra-high pressure water flow ejected from the nozzle, and then the pre-alloyed droplets are solidified into powder in the water of the atomization collection bucket. After being treated with TZYJ corrosion inhibitor at a concentration of 0.5%, the powder is dried at a temperature of 80-110...

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Abstract

The invention relates to a method for preparing prealloy powder for a low-oxygen-content micro-diamond product and using ultrahigh-pressure water atomization. The method comprises the technological processes of prealloy smelting, ultrahigh-pressure water atomization, quick solidification, cooling, powder corrosion inhibition process, powder collection, powder drying, powder property detection, product packaging and the like. The method has the advantages that the product is low in oxygen content, fine in granularity, controllable in particle morphology, and even and non-segregation in component, prealloy of powder elements is achieved, production process device and technology are simple, and operation is convenient.

Description

technical field [0001] The invention relates to the technical field of preparation of metal powder materials, in particular to a method for preparing pre-alloyed powder for micro-diamond products with low oxygen content by ultra-high pressure water atomization. Background technique [0002] Since the production of atomized iron powder began during the Second World War, the atomization pulverization technology has developed rapidly and has become one of the most important methods for preparing powders. The atomization method can produce elemental metal powders such as lead, tin, aluminum, zinc, copper, nickel, cobalt, etc., and can also produce pre-alloyed powders such as bronze, brass, alloy steel, and stainless steel. Compared with the electrolysis method, reduction method, and mechanical pulverization and mixing method, the atomization method ensures the complete pre-alloying of metal elements during the smelting process, eliminates component segregation, and is convenient...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B22F1/00
Inventor 储志强黄圣坤曾归余肖明清余勇
Owner HUNAN METALLURGY MATERIAL RES INST
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