Preparation method of co-injection multi-layer structure part

A multi-layer structure and co-injection technology, which is applied in the field of powder co-injection molding, can solve the problems of large interfacial bonding strength due to component differences, difficulty in preparing materials with comprehensive properties, and unfavorable mass production, etc., achieving high interfacial bonding strength and suitable for large Large-scale production, solving the effect of large ingredient restrictions

Active Publication Date: 2021-08-31
CENT SOUTH UNIV
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Problems solved by technology

It is difficult to prepare materials with good comprehensive properties by traditional technology. The main solution is to manufacture multi-layer composite structural materials, which not only maintain the advantages of the properties of each component material, but also obtain a single composition through the complementarity and correlation of the properties of each component. Comprehensive performance that cannot be achieved by materials
There are many preparation processes for composite materials, such as chemical vapor deposition (CVD), physical vapor deposition (PVD), laser cladding, thermal spraying, self-propagating high-temperature synthesis, sol-gel technology, etc., but these processes are different. To a certain ext

Method used

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  • Preparation method of co-injection multi-layer structure part

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[0035] Example 1-1:

[0036] Preparation technique of co-injection multilayer structure part, which follows:

[0037] A, raw material preparation: A matrix material selected aerosolized prepared 316L stainless steel powder, an average particle diameter of 15μm. B is a bond powder and fortified powder B1 B2 mixed powder. B1 powder adhesive composition is Co-Cu, average particle diameter 15μm, strengthening a component of the powder B2 ZrO 2 Average particle diameter of 300 nm, the volume fraction of bonded powders B1 powder B is 35%.

[0038] B, Preparation of the binder: the following formulation mass percent, polyoxymethylene (POM) 80%; polypropylene (PP) 10%; polyethylene wax (PE wax) 5%; stearic acid (SA) 5%.

[0039] C, feeding Preparation: 316L stainless steel powder with a binder in a volume ratio of 45%: kneaded, granulated feed made from 55% A, kneading temperature of 155 deg.] C, mixer speed is 90r / min, kneading time is 2H; B powder binder volume ratio of 48%: 52% knead...

Example Embodiment

[0044] Example 1-2:

[0045] Preparation technique of co-injection multilayer structure part, which follows:

[0046] A, raw material preparation: A matrix material selected aerosolized prepared 316L stainless steel powder, an average particle diameter of 15μm. B is a bond powder and fortified powder B1 B2 mixed powder. B1 powder adhesive composition is Co-Cu, average particle diameter 15μm, strengthening a component of the powder B2 ZrO 2 Average particle diameter of 400 nm, the volume fraction of bonded powders B1 powder B is 35%.

[0047] B, Preparation of the binder: the following formulation mass percent, polyoxymethylene (POM) 80%; polypropylene (PP) 10%; polyethylene wax (PE wax) 5%; stearic acid (SA) 5%.

[0048] C, feeding Preparation: 316L stainless steel powder with a binder in a volume ratio of 45%: kneaded, granulated feed made from 55% A, kneading temperature of 155 deg.] C, mixer speed is 90r / min, kneading time is 2H; B powder binder volume ratio of 48%: 52% knead...

Example Embodiment

[0053] Example 1-3:

[0054] Preparation technique of co-injection multilayer structure part, which follows:

[0055] A, raw material preparation: A matrix material selected aerosolized prepared 316L stainless steel powder, an average particle diameter of 15μm. B is a bond powder and fortified powder B1 B2 mixed powder. B1 powder adhesive composition is Co-Cu, average particle diameter 15μm, strengthening a component of the powder B2 ZrO 2 Average particle diameter of 300 nm, the volume fraction of bonded powders B1 powder B is 35%.

[0056] B, Preparation of the binder: the following formulation mass percent, polyoxymethylene (POM) 80%; polypropylene (PP) 10%; polyethylene wax (PE wax) 5%; stearic acid (SA) 5%.

[0057] C, feeding Preparation: 316L stainless steel powder with a binder in a volume ratio of 45%: kneaded, granulated feed made from 55% A, kneading temperature of 155 deg.] C, mixer speed is 90r / min, kneading time is 2H; B powder binder volume ratio of 48%: 52% knead...

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Abstract

The invention discloses a preparation method of a co-injection multi-layer structure part. The preparation method of the co-injection multi-layer structure part comprises the following steps of respectively mixing and granulating powder A and powder B formed by mixing bonding powder B1 and strengthening powder B2 with a binder to obtain uniform feeds A and B; then sequentially injecting the two feeds into a mold cavity by utilizing a co-injection molding technology to obtain a product green body, and removing the binder in the green body through a degreasing process; and finally, carrying out co-sintering densification and annealing heat treatment so as to obtain the multi-layer structure part. The preparation method of the co-injection multi-layer structure part provided by the invention has the advantages of being free of component limitation, high in interface bonding strength, simple in process, suitable for large-scale production and the like, is beneficial to improving the comprehensive performance of parts, solves the problems of large component limitation, low interface strength, complex process, high cost and the like in the prior art, and is very suitable for preparing multi-layer structure parts.

Description

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Claims

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Application Information

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Owner CENT SOUTH UNIV
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