Water atomization diffusion alloy powder and preparation method thereof

A technology of diffusion alloying and manufacturing method, applied in the field of powder metallurgy, can solve the problems of reducing the yield of sintered products, segregation of alloy elements, low strength and hardness parameters, etc., to improve mechanical properties, reduce bulge or agglomeration, high compression sexual effect

Active Publication Date: 2011-06-22
ANGANG (ANSHAN) METALLURGY POWDER MATERIAL CO LTD
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Problems solved by technology

[0003] At present, in order to improve the comprehensive properties of powder metallurgy products such as hardenability, strength, and toughness, Mo, Ni, and Cu powders are often added to water atomized iron ...

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  • Water atomization diffusion alloy powder and preparation method thereof

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Embodiment Construction

[0013] The specific implementation of the present invention will be further described below in conjunction with examples:

[0014] The manufacturing method of water atomized diffusion alloy powder is to add ferromolybdenum in the smelting process to make water atomized pre-alloyed powder, then add nickel powder and copper powder to the product through diffusion treatment. The operation steps are as follows:

[0015] 1) Smelting, smelting scrap steel with an electric furnace to obtain molten steel with uniform and stable composition and few impurities. Add a molybdenum-iron alloy with a Mo content of 50-60% to the molten steel and stir until it is uniform;

[0016] 2) Water atomization process parameters, tapping temperature 1600~1800℃, atomization start temperature 1580-1700℃, atomization termination temperature 1550-1650℃, molten steel flow diameter 30~35mm, molten steel atomization speed 2.8- 4.5kg / s, atomization pressure 60~160Mpa, high pressure water pressure 70-125MPa, flow 140-...

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Abstract

The invention belongs to the field of powder metallurgy, and more particularly relates to a preparation method of water atomization diffusion alloy powder, which is characterized in that ferro-molybdenum is firstly added in the smelting process, and water atomization pre-alloyed powder can be prepared; and nickel powder and copper powder are mixed into the water atomization pre-alloyed powder for diffusion treatment. The preparation method has the operation steps of: 1) adding the ferro-molybdenum after smelting; 2) carrying out water atomization; 3) reducing; and 4) adding nickel powder and copper powder and diffusing by a reduction furnace. The prepared water atomization diffusion alloy powder comprises the chemical composition by weight percent: 0.001-0.2% of C, 0-0.5% of Si, 0-0.5% of Mn, 0-0.05% of P, 0-0.050% of S, 0.1-5.0% of Ni, 0.1-3% of Mo, 0.1-5.0% of Cu and the balance of Fe. The invention has the beneficial effects that alloying elements can be further completely alloyed in the diffusion process; and composition segregation of the alloying elements can not be caused in the processes of transportation and mixing treatment.

Description

Technical field [0001] The invention belongs to the field of powder metallurgy, and in particular relates to a pre-alloyed + diffusion alloyed water atomized diffusion alloy powder and a manufacturing method thereof. Background technique [0002] In order to improve the strength, toughness and apparent hardness of powder metallurgy products, the sintering-quenching-tempering production process is generally used. Choosing appropriate alloying elements can effectively improve the hardenability of the material, so that the product undergoes a martensitic transformation during a series of heat treatments, and at the same time has a certain toughness. Water atomized alloy powder can effectively improve powder metallurgy products Comprehensive mechanical properties, especially on impact-resistant products such as electric tools and refrigerator crankshafts, have good comprehensive performance, and can ensure the dimensional tolerance of powder metallurgy products. [0003] At present, i...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00
Inventor 卜福昌纪向军张文峰
Owner ANGANG (ANSHAN) METALLURGY POWDER MATERIAL CO LTD
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