Preparation method of alloy counterweight block injected and molded by powder

A powder injection molding and counterweight technology is applied in the field of preparation of tungsten-nickel-iron alloy counterweight, which can solve the problems of complex three-dimensional shape of alloy counterweight, high processing difficulty, low output and waste, etc.

Inactive Publication Date: 2016-01-20
NINGBO YUXIN METAL POWDER TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0002] Traditional three-dimensional complex alloy counterweights are generally made of iron-nickel alloy materials. The production needs to be invested through a series of equipment, such as machining centers, punching machines, milling machines, precision punching machines, wire cutting, etc., requiring a lot of investment Equipment and labor, etc., have the problem of high production cost, low output and low waste of resources, especially because the three-dimensional shape of the alloy counterweight is complex, so the processing is difficult. The metal powder injection molding process can solve the above problems well, but the use of metal powder injection molding The process is easy to affect the performance of the product due to the problem of degreasing rate

Method used

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Embodiment Construction

[0014] A detailed description will be given below of specific embodiments of the present invention.

[0015] The preparation method of the alloy counterweight block of powder injection molding, the steps include the following steps in sequence:

[0016] (1) Granulation, the metal powder and the binder are blended through a banbury mixer, the banbury temperature is 180 degrees, and after 3 hours of banbury mixing, natural cooling is obtained to obtain the fluidity of the pellets, which are extruded by a screw extruder. Granules, which become rheological pellets; metal powder is 95.2%, binder is 4.8%; metal powder is mixed by the following components according to the mass ratio: W95%, Ni3.5%, Fe1.5%; The binder is mixed from the following components: The binder is mixed from the following components: palm wax 12%, microcrystalline wax 12%, stearic acid 1.5%, polyethylene 8.5%, polypropylene 15% , polyethylene glycol 2%, vinyl acetate 1%, the balance is paraffin;

[0017] (2) I...

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Abstract

The invention relates to a preparation method of a tungsten-nickel-iron alloy counterweight block injected and molded by metal powder. A preparation method of an alloy counterweight block injected and molded by powder comprises the following steps in sequence: pelleting by blending metal powder with an adhesive in an internal mixer to form pellets with rheological properties; injecting and molding by injecting the pellets into a die cavity with the shape of the alloy counterweight block to form a blank part; degreasing by removing part of the adhesive in the blank part, in which a degreasing solvent is aviation kerosene; and sintering by removing the adhesive to obtain the alloy counterweight block. The preparation method of the tungsten-nickel-iron alloy counterweight block injected and molded by the metal powder has the advantages that the degreasing rate is high, and the product is excellent in performance and low in production cost.

Description

technical field [0001] The invention relates to a preparation method of a tungsten-nickel-iron alloy counterweight block formed by metal powder injection molding. Background technique [0002] Traditional three-dimensional complex alloy counterweights are generally made of iron-nickel alloy materials. The production needs to be invested through a series of equipment, such as machining centers, punching machines, milling machines, precision punching machines, wire cutting, etc., requiring a lot of investment Equipment and labor, etc., have the problem of high production cost, low output and low waste of resources, especially because the three-dimensional shape of the alloy counterweight is complex, so the processing is difficult. The metal powder injection molding process can solve the above problems well, but the use of metal powder injection molding The process is easy to affect the performance of the product due to the problem of degreasing rate. Contents of the inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/22
Inventor 肖军杨东
Owner NINGBO YUXIN METAL POWDER TECH CO LTD
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