Synchronous sintering method of titanium alloy or pure titanium product in powder injection molding

A technology of powder injection molding and sintering method, which is applied in the field of simultaneous sintering of titanium alloy or pure titanium products in powder injection molding, can solve the problems of large sintering deformation and high sphericity of titanium alloy powder, and achieves improvement of sintering deformation and sintering. The effect of yield and production cost reduction

Active Publication Date: 2020-11-03
CHANGZHOU GIAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the high sphericity of titanium alloy powder and the phase change of the material at high temperature, the conventional sintering fixture cannot play a good supporting role, resulting in a large sintering deformation of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The present invention comprises the steps:

[0024] S1, preparing TC4 injection base;

[0025] S2. Preparation of sintering jig injection blank:

[0026] A: Mixed powder: Mix zirconia powder and low-temperature glass powder evenly by ball milling, wherein the mass ratio of zirconia powder is 80wt%;

[0027] B: Feed material preparation: Mix uniformly mixed powder and plastic-based binder in an internal mixer, and granulate with a granulator to obtain feed particles;

[0028] C: The feed particles are injected into the injection molding machine to obtain the injection blank of the sintered fixture;

[0029] S3. Ornament: put the TC4 injection blank on the injection blank of the sintering fixture;

[0030] S4. Catalyze the TC4 injection blanks placed together with the sintered fixture injection blanks together to obtain the TC4 catalytic blanks and sintered fixture catalytic blanks placed together; wherein the catalytic temperature is 110° C., and the acid passage time...

Embodiment 2

[0035] The present invention comprises the steps:

[0036] S1, preparing pure titanium injection blank;

[0037] S2. Preparation of sintering jig injection blank:

[0038] A: Mixed powder: Mix boron nitride powder and low-temperature glass powder evenly by ball milling, wherein the mass ratio of boron nitride powder is 85wt%;

[0039] B: Feed material preparation: Mix uniformly mixed powder and plastic-based binder in an internal mixer, and granulate with a granulator to obtain feed particles;

[0040] C: The feed particles are injected into the injection molding machine to obtain the injection blank of the sintered fixture;

[0041] S3. Ornament: put the pure titanium injection blank on the injection blank of the sintering fixture;

[0042] S4. Catalyze the pure titanium injection base and the sintering jig injection base together to obtain the pure titanium catalytic base and the sintering jig catalytic base; wherein the catalytic temperature is 110° C., and the acid pass...

Embodiment 3

[0047] The present invention comprises the steps:

[0048] S1, prepare TC11 injection base;

[0049] S2. Preparation of sintering jig injection blank:

[0050] A: Mixed powder: mix the yttrium oxide powder and hollow glass microspheres uniformly by ball milling, wherein the mass ratio of the yttrium oxide powder is 75wt%;

[0051] B: Feed material preparation: Mix uniformly mixed powder and plastic-based binder in an internal mixer, and granulate with a granulator to obtain feed particles;

[0052] C: The feed particles are injected into the injection molding machine to obtain the injection blank of the sintered fixture;

[0053] S3. Ornament: put the TC11 injection blank on the injection blank of the sintering fixture;

[0054] S4. Catalyze the TC11 injection blanks placed together with the sintered fixture injection blanks together to obtain the TC11 catalytic blanks and sintered fixture catalytic blanks placed together; wherein the catalytic temperature is 115° C., and t...

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PUM

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Abstract

The invention relates to a synchronous sintering method of a titanium alloy or a pure titanium product in powder injection molding. The synchronous sintering method comprises the following steps: S1,an injection blank of the titanium alloy or pure titanium is prepared; S2, a sintering jig injection blank is prepared, wherein, A, powder is mixed, specifically, ceramic powder and a low-temperaturesintering aid are uniformly mixed; B, feed is prepared, specifically, the uniformly mixed powder is prepared into feed particles; and C, the feed particles are subjected to injection molding through an injection molding machine to obtain the sintering jig injection blank; S3, placing is conducted, specifically, the injection blank of the titanium alloy or the pure titanium is placed on the sintering jig injection blank; S4, catalyzing is conducted, specifically, a catalytic blank is obtained; S5, thermal desorption is conducted, specifically, a thermal desorption blank is obtained; and S6, sintering is conducted, specifically, a sintered blank is obtained. According to the synchronous sintering method of the titanium alloy or the pure titanium product in powder injection molding, the product and a sintering jig are synchronously sintered, thus synchronous shrinkage of the sintering jig and the product is achieved, the sintering jig has a good supporting effect on the product, and therefore sintering deformation of the titanium alloy or the pure titanium product is effectively improved, and the sintering yield is increased.

Description

technical field [0001] The invention relates to a powder injection molding process, in particular to a synchronous sintering method for titanium alloy or pure titanium products in powder injection molding. Background technique [0002] Titanium and titanium alloys have the advantages of low density, high specific strength, strong corrosion resistance, and excellent biocompatibility, and are widely used in aerospace, automobile, medicine, electronics and other fields. However, the machinability of titanium and titanium alloys Poor, difficult to cut, and become an obstacle to the production of complex shape parts. Metal powder injection molding (MIM), as a near-net molding technology, has high material utilization rate, saves processing costs, and can produce products with complex geometric shapes in large quantities. [0003] Due to the high sphericity of the titanium alloy powder and the phase change of the material at high temperature, the conventional sintering fixture ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/22B22F3/10
CPCB22F3/225B22F3/10
Inventor 苏绍华王浩王祥羽常文杲邬均文王明喜
Owner CHANGZHOU GIAN TECH
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