FeNiCuSn prealloy powder and preparation method and application thereof

A pre-alloyed powder, powder technology, applied in the field of preparation, FeNiCuSn pre-alloyed powder, can solve the problems of low bulk density of fine powder, uneven distribution of green compact density, deterioration of mechanical properties, etc., to solve the problem of ultra-fine powder cold pressing Poor properties, promotion of interdiffusion process, and excellent diffusion effect

Active Publication Date: 2019-11-22
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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  • FeNiCuSn prealloy powder and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]The FeNiCuSn pre-alloyed powder, powder composition by weight percentage is: 30.00% Cu, 3.0% Ni, 4.0% Sn, 0.3% Si, 1.0% Ti, 0.5% Cr, 0.8% Mo, balance Fe; wherein CuSn15 pre-alloyed The ratio of powder precursor and ultrafine FeNiCuSn pre-alloyed powder precursor is 5:95. Corresponding ultrafine FeNiCuSn pre-alloyed powder precursor composition weight percent 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, powder composition by weight percentage is: 35.00% Cu, 4.0% Ni, 3.0% Sn, 0.2% Si, 1.0% Ti, 0.5% Cr, 1.2% Mo, balance Fe; wherein CuSn15 pre-alloyed The ratio of powder precursor and ultrafine FeNiCuSn pre-alloyed powder precursor is 7:93. Corresponding ultrafine FeNiCuSn pre-alloyed powder precursor composition weight percent 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 present invention also provides a method for preparing FeNiCuSn pre-alloyed powder, which adopts ultra-high pressure water-gas combined atomization to prepare two precursors: CuSn15 pre-alloyed powder precursor and ultrafine FeNiCuSn pre-alloyed powder precursor; after that, the The prepared two precursors are fully mixed evenly according to a certain ratio, and the weight percentage is: 2-10% of the CuSn15 pre-alloyed powder precursor, and 90-98% of the ultra-fine FeNiCuSn pre-alloyed powder precursor; then car...

Embodiment 1

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

[0063] 1) Medium frequency induction smelting: FeNiCuSn pre-alloyed powder alloy composition weight percent 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-alloyed 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] Select pure iron, pure nickel, ferro-titanium, ferromolybdenum, pure copper, pure tin, high-purity silicon and ferrochrome according to the composition of the two precursor alloys, and smelt the raw materials in an intermediate frequency furnace, controlling the smelting power to 100-300KW , 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, the alloying process of the molten steel...

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Abstract

The invention discloses FeNiCuSn prealloy powder and a preparation method and application thereof. The FeNiCuSn prealloy powder comprises the following components in percentage by weight: 30.0-40.0 %of Cu, 2.0-5.0 % of Ni, 2.0-6.0 % of Sn, 0.1-2.0 % of Si, 0.5-3.0 % of Ti, 0-2.0 % of Cr, 0.5-1.5 % of Mo, and the balance Fe; the powder components are correspondingly mixed with two precursors meeting the following conditions: a CuSn15 prealloy powder precursor and an ultra-fine FeNiCuSn prealloy powder precursor, and the CuSn15 prealloy powder precursor accounts for 2-10% of the total weight. The FeNiCuSn prealloy powder prepared by the method is low in oxygen content, good in pressing formability, high in sintering activity, and uniform and fine in alloy component and structure; the relative density, hardness, bending strength and other mechanical properties of a diamond product matrix prepared from the powder are greatly improved, the matrix has better mechanical embedding effect andmetallurgical bonding force to diamond particles, and a diamond tool prepared from the powder is more excellent in cutting effect and longer in 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 an application. 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 powders are used in the manufacturing process of diamond circular saw blades, grinding wheels, thin-walled drills and other products, and the application fields of pre-alloyed powders are constantly expanding. In recent years, scholars at home and abroad have extensively carried out 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: first, alloy composition optimization design; Fine diamond pre-alloyed powder. [0003] The shape, particle size and distribution of th...

Claims

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Application Information

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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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