Feed for metal-powder injection molding and preparation method of feed

An injection molding, metal powder technology, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as easy deformation and inability to apply in large quantities, achieve the effect of improving hardness, expanding the scope of market application, and solving easy deformation

Inactive Publication Date: 2018-12-21
DONGGUAN HUAJING POWDER METALLURGY
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Problems solved by technology

However, due to the low hardness of 316L stainless steel, the application of large 316L stainless steel parts in electronic products is limited. With the continuous development of social technology, the hardness of ordinary 316L stainless steel can no longer meet the needs of all customers. Softer and easier to deform than other stainless steel materials, it cannot be used in large quantities

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  • Feed for metal-powder injection molding and preparation method of feed
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  • Feed for metal-powder injection molding and preparation method of feed

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preparation example Construction

[0050] In one embodiment, a kind of preparation method of described metal powder injection molding feedstock, comprises the following steps:

[0051] S1. adding the stainless steel feed powder to the mixer for preheating;

[0052] S2. The forming agent added according to the proportion is mixed;

[0053] S3. Extrusion granulation.

[0054] In a preferred embodiment, in step S1, the stainless steel feed powder is preheated to a predetermined temperature to remove moisture in the powder, more preferably, heated to a predetermined temperature of 200°C.

[0055] In a preferred embodiment, in step S2, the forming agent is added and kneaded at a temperature higher than 170°C.

[0056] In a preferred embodiment, in step S2, the temperature is kept at 185° C., the rotation speed is 20 r / min, the heating is stopped after kneading for 30 min, and kneading is continued for another 30 min.

[0057] In one embodiment, a method of using the metal powder injection molding feedstock to mak...

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Abstract

The invention discloses a feed for metal-powder injection molding and a preparation method of the feed. The feed consists of a forming agent and 316L stainless steel feed powder, wherein the mass ratio of the forming agent to the 316L stainless steel feed powder is 96:4-90:10; the 316L stainless steel feed powder comprises, by mass, 90%-99% of 316L stainless steel powder and 1%-10% of chromium carbide powder; and the forming agent comprises, by mass, 5%-10% of paraffin, 5%-10% of ethylene-acrylic acid copolymer, 5%-10% of polyethylene, 5%-10% of polyethylene glycol and 75%-80% of polyoxymethylene. If the feed is used in the MIM process as a feed of the MIM process, the feed can be processed to produce structural-member products required by various 3C electronic devices. Besides, the feed has a product performance of high hardness and quality.

Description

technical field [0001] The invention relates to a metal powder injection molding feed material and a preparation method thereof. Background technique [0002] With the continuous advancement of social science and technology and the vigorous development of global industrialization, powder metallurgy has developed rapidly due to its many advantages, and its technology has been widely used in military, transportation, machinery, electronics, aerospace, aviation and other fields. [0003] MIM (Metal Powder Injection Molding) feeding is the core process of metal injection molding product preparation. It is to mix metal powder and additives at a certain temperature in a mixing and granulating integrated machine for a period of time according to a certain ratio, and then After screw extrusion, cutting and granulation, it is made into injection molding feed. [0004] Among them, 316L stainless steel (such as SUS316L stainless steel) is fed, because of the corrosion resistance and p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/22
CPCB22F3/225B22F1/10
Inventor 张维周国荣王璇王文桃
Owner DONGGUAN HUAJING POWDER METALLURGY
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