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A rare earth-adjusted water-atomized Fe-cu pre-alloyed powder for superhard material products and its preparation method

A technology of pre-alloy powder and superhard material, which is applied in the field of rare earth-adjusted water-atomized Fe-Cu pre-alloy powder and its preparation field for superhard material products, which can solve the problems of poor diamond wettability, insufficient holding force, and poor sharpness, etc. problems, to achieve the effect of improving density and bending strength, improving sharpness, and improving holding force

Active Publication Date: 2018-10-09
秦皇岛市雅豪新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • A rare earth-adjusted water-atomized Fe-cu pre-alloyed powder for superhard material products and its preparation method
  • A rare earth-adjusted water-atomized Fe-cu pre-alloyed powder for superhard material products and its preparation method
  • A rare earth-adjusted water-atomized Fe-cu pre-alloyed powder for superhard material products and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0016] A medium-frequency induction smelting furnace with a furnace capacity of 250kg for work and production is used as the lining material of magnesia, and the composition ratio is 78.7%Fe, 20%Cu, 1%P, 0.2%Ce, 0.1%Y. The raw materials and their weights are listed in Table 1 below:

[0017] Table 1 Raw materials and weight (embodiment 1)

[0018]

[0019] Add Fe, Cu, CuP, rare earth Ce and Y to the medium frequency induction furnace in turn, energize to melt and refine, deoxidize by adding carbon powder, adjust the superheat of molten steel to 150~200℃, pour it into the tundish, After the molten steel passes through the leakage hole at the bottom of the ladle, it is crushed by high-pressure water and atomized into powder in the atomization barrel filled with nitrogen protection. The powder after atomization is fully dehydrated by vacuum filtration, then put into a drying oven to dry for 6~10 hours, and then reduced with hydrogen-nitrogen mixed gas (hydrogen accounted for ...

Embodiment 2

[0023] A medium-frequency induction smelting furnace with a furnace capacity of 250kg for work and production is used as the lining material of magnesia, and the composition ratio is 78.1%Fe, 20%Cu, 1.5%P, 0.2%Ce, 0.2%Y. The raw materials and their weights are listed in Table 3 below:

[0024] Table 3 raw materials and weight (embodiment 2)

[0025]

[0026] Add Fe, Cu, CuP, rare earth Ce and Y to the medium frequency induction furnace in turn, energize to melt and refine, deoxidize by adding carbon powder, adjust the superheat of molten steel to 150~200℃, pour it into the tundish, After the molten steel passes through the leakage hole at the bottom of the ladle, it is crushed by high-pressure water and atomized into powder in the atomization barrel filled with nitrogen protection. The powder after atomization is fully dehydrated by vacuum filtration, then put into a drying oven to dry for 6~10 hours, and then reduced with hydrogen-nitrogen mixed gas (hydrogen accounted fo...

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Abstract

The invention provides a rare earth-adjusted water-atomized Fe-Cu pre-alloy powder for superhard material products and a preparation method thereof. This method adopts high-temperature liquid melting and high-pressure water atomization methods to produce and prepare ultra-fine iron-copper pre-alloy powder. A homogeneous mechanical mixture of Fe-Cu atomic clusters is formed inside the powder particles, mainly Fe, supplemented by soft phase Cu, and adding brittle phase-forming element P and rare earth elements (Ce, Y) for grain refinement, production and preparation The two-component Fe-Cu basic pre-alloyed powder can better meet the performance requirements of different types of superhard products. The element P can form hard and brittle particles such as Fe3P and Cu2P inside the alloy powder particles, and the dispersion distribution can adjust the brittleness of the powder sintered structure. Wear performance is beneficial to improve the sharpness of tools; rare earth elements Ce and Y can refine powder grains, improve the density and bending strength of powder sintered structure, and help to improve the holding force of sintered structure to diamond.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/16B22F9/08B22F1/00C22C29/00
CPCC22C29/005C22C38/002C22C38/005C22C38/16B22F9/082B22F2009/0828B22F2009/0844B22F2998/10B22F2999/00B22F1/145B22F2201/02B22F2201/013
Inventor 董书山刘益刚乔翠娅李博刘鑫
Owner 秦皇岛市雅豪新材料科技有限公司
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