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A kind of fenicusn pre-alloyed powder, preparation method and application

A pre-alloyed powder and powder technology, which is applied in the field of preparation, FeNiCuSn pre-alloyed powder, can solve the problems of uneven density distribution of green compact, low bulk density of fine powder, deterioration of mechanical properties, etc., to avoid serious powder agglomeration Sintering, solving the effect of poor cold press formability of ultrafine powder, and promoting the interdiffusion process

Active Publication Date: 2022-06-21
TIZ ADVANCED ALLOY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the smaller the particle size of the powder, the more the point contact between the particles, the more the contact area increases, the easier it is to form a bridge, resulting in poor fluidity, the more difficult it is to fill the cavity, and the poorer the pressing performance
Moreover, due to the low bulk density of the fine powder, the filling volume in the molding process is large, resulting in the increase of the movement distance of the die punch and the internal friction between the powder during the pressing process, the increase in pressure loss, and the uneven density distribution of the green compact. Significantly worse performance

Method used

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  • A kind of fenicusn pre-alloyed powder, preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]The FeNiCuSn pre-alloyed powder has the following components by weight: 30.00% Cu, 3.0% Ni, 4.0% Sn, 0.3% Si, 1.0% Ti, 0.5% Cr, 0.8% Mo, and the balance Fe; among which CuSn15 is pre-alloyed The ratio of powder precursor and ultrafine FeNiCuSn pre-alloyed powder precursor is 5:95. The corresponding weight percentage of the precursor of the ultrafine FeNiCuSn pre-alloyed powder is:

[0035] 3.16wt%Ni-27.1wt%Cu-3.4%Sn-0.31wt%Si-1.05wt%Ti-0.53wt%Cr-0.84wt%Mo, balance Fe.

Embodiment 2

[0037] The FeNiCuSn pre-alloyed powder has the following components by weight: 35.00% Cu, 4.0% Ni, 3.0% Sn, 0.2% Si, 1.0% Ti, 0.5% Cr, 1.2% Mo, and the balance Fe; among which CuSn15 is pre-alloyed The ratio of powder precursor and ultrafine FeNiCuSn pre-alloyed powder precursor is 7:93. The corresponding weight percentage of the precursor of the ultrafine FeNiCuSn pre-alloyed powder is:

[0038] 4.3wt%Ni-31.24wt%Cu-2.1%Sn-0.22wt%Si-1.07wt%Ti-0.54wt%Cr-1.3wt%Mo, balance Fe.

[0039] The invention also provides a preparation method of FeNiCuSn pre-alloyed powder. Two kinds of precursors are prepared by means of ultra-high pressure water-gas combined atomization powder preparation: CuSn15 pre-alloyed powder precursor and ultra-fine FeNiCuSn pre-alloyed powder precursor; The prepared two precursors are fully mixed and uniform in a certain proportion, and the weight percentages are: CuSn15 pre-alloy powder precursor 2-10%, ultrafine FeNiCuSn pre-alloy powder precursor 90-98%; and...

Embodiment 1

[0062] A preparation method suitable for FeNiCuSn pre-alloyed powder for diamond tools, comprising:

[0063] 1) Intermediate frequency induction melting: FeNiCuSn pre-alloy powder alloy composition weight percentage is Fe-3.0wt%Ni-30.0wt%Cu-4.0wt%Sn-0.3wt%Si-1.0wt%Ti-0.5wt%Cr-0.8wt% Mo. Among them, the weight percentage of the prepared FeNiCuSn pre-alloy powder precursor is: Fe-3.16wt%Ni-27.1wt%Cu-3.4%Sn-0.31wt%Si-1.05wt%Ti-0.53wt%Cr-0.84wt%Mo , CuSn15 pre-alloyed powder precursor composition is Cu-15wt% Sn.

[0064] According to the composition of the two precursor alloys, pure iron, pure nickel, titanium iron, molybdenum iron, pure copper, pure tin, high-purity silicon and ferrochromium are selected respectively. , the smelting time is 40.0-70.0 minutes, when the temperature of the molten steel reaches ≥1620 °C, the power is reduced to 60-80KW, and the alloying process of the molten steel is 5.0-10.0 minutes, then the slag is cleaned, and the pump is poured into the steel;...

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Abstract

The invention discloses a FeNiCuSn pre-alloyed powder, its preparation method and its application. The powder components are: 30.0-40.0% Cu, 2.0-5.0% Ni, 2.0-6.0% Sn, 0.1-2.0% Si, 0.5-3.0% Ti, 0-2.0% Cr, 0.5-1.5% Mo, balance Fe; The powder composition corresponds to the mixing of two precursors that meet the following conditions: CuSn15 pre-alloyed powder precursor and ultrafine FeNiCuSn pre-alloyed powder precursor; wherein , the CuSn15 pre-alloyed powder precursor accounts for 2-10% of the total weight. The FeNiCuSn pre-alloyed powder prepared by the present invention has low oxygen content, good press formability, high sintering activity, uniform and delicate alloy composition and structure; the relative density, hardness and bending strength of the prepared diamond product matrix are obtained. Greatly improved, the matrix has a better mechanical wrapping effect and metallurgical bonding force on the diamond particles, and the prepared diamond tools have a sharper cutting effect and a longer service life.

Description

technical field [0001] The invention relates to the technical field of pre-alloyed powders, in particular to a FeNiCuSn pre-alloyed powder, a preparation method and applications. Background technique [0002] Since the appearance of pre-alloyed powder in the 1990s, it has been widely used in the diamond tool industry due to its special properties. A considerable proportion of pre-alloyed powder is used in the manufacturing process of diamond circular saw blades, grinding wheels, thin-walled drill bits and other products, and the application fields of pre-alloyed powder are constantly expanding. In recent years, domestic and foreign scholars have carried out extensive research on Fe-based pre-alloyed powders. The main research directions of Fe-based pre-alloyed powders for diamond tools are mainly divided into the following two categories: one, the optimal design of alloy composition; Fine diamond pre-alloyed powder. [0003] The morphology, particle size and distribution o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08B22F9/20C22C9/02C22C30/02C22C30/04C22C38/02C22C38/42C22C38/44C22C38/50
CPCB22F9/082B22F9/20C22C38/42C22C38/008C22C38/02C22C38/50C22C38/44C22C9/02C22C30/02C22C30/04B22F2009/0828B22F2009/0848
Inventor 乐晨唐明强赵放陈义华
Owner TIZ ADVANCED ALLOY TECH CO LTD
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