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Ti6Al4V alloy injection forming method

A technology of injection molding and powder injection molding, which is used in the field of titanium alloy forming to achieve the effect of high dimensional accuracy

Inactive Publication Date: 2005-07-27
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the preparation of Ti6Al4V alloy by metal injection molding in the world.

Method used

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  • Ti6Al4V alloy injection forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The ratio of hydrogenation-dehydrogenation Ti6Al4V: gas atomization Ti6Al4V is 1:9 to prepare the powder according to weight percentage, the binder is composed of 60% PW, 15% PEG20000, 15% LDPE, 10% PP and 0% SA, and the powder loading The volume is 68vol%. Mix the powder and binder on the SK-160 open rubber mixer for 1.5 hours, and then granulate on the PSJ32 mixing extruder to make the feeding more uniform. The feeding is in the CJ80- Injection molding on an E-type injection machine, the injection temperature is 120°C, the injection pressure is 80MPa, and the resulting injection blank is solvent degreased at 50°C for 2 hours in a mixed solvent of absolute ethanol and trichlorethylene (vol / vol=1.5:7.5) , and then dried at 40°C for 60 minutes and then placed in a vacuum degreasing furnace (10-3Pa) for thermal degreasing. The degreasing time was 8 hours, and the degreasing body was sintered in a vacuum sintering furnace (10-3Pa). The temperature is 1230°C, the sintering ...

Embodiment 2

[0017] The ratio of hydrogenation-dehydrogenation Ti6Al4V: gas atomization Ti6Al4V is 1:9 to prepare the powder according to the weight percentage. The binder is composed of 60% PW, 14% PEG20000, 15% LDPE, 10% PP and 1% SA. The volume is 68vol%. Mix the powder and binder on the SK-160 open rubber mixer for 1.5 hours, and then granulate on the PSJ32 mixing extruder to make the feeding more uniform. The feeding is in the CJ80- Injection molding on an E-type injection machine, the injection temperature is 130°C, and the injection pressure is 70MPa. The resulting injection blank is solvent-degreased at 50°C for 3 hours in a mixed solvent of absolute ethanol and trichlorethylene (vol / vol=1.5:7.5) , then dried at 40°C for 60 minutes and then placed in a vacuum degreasing furnace (10 -3 Pa) carried out thermal degreasing, and the degreasing time was 8 hours, and the degreasing body was placed in a vacuum sintering furnace (10 -3 Pa) for sintering, the sintering temperature is 1230°C...

Embodiment 3

[0019] The ratio of hydrogenation-dehydrogenation Ti6Al4V: gas atomized Ti6Al4V is 1:9 to prepare the powder according to the weight percentage. The binder is composed of 62% PW, 14% PEG20000, 12% LDPE, 9% PP and 3% SA. The powder loading The volume is 70vol%, the powder and the binder are mixed on the SK-160 open rubber mixer for 1.8 hours, and then granulated on the PSJ32 mixing extruder to make the feeding more uniform, and the feeding is in the CJ80- Injection molding on an E-type injection machine, the injection temperature is 130°C, the injection pressure is 80MPa, and the resulting injection blank is solvent degreased at 60°C for 2 hours in a mixed solvent of absolute ethanol and trichlorethylene (vol / vol=1.5:7.5) , then dried at 40°C for 30 minutes and then placed in a vacuum degreasing furnace (10 -3 Pa) carried out thermal degreasing, and the degreasing time was 7 hours, and the degreasing body was placed in a vacuum sintering furnace (10 -3 Pa) for sintering, the s...

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Abstract

An injection moulding technology for the Ti6A14V alloy workpiece includes such steps as steps as providing Ti6A14V powder, proportionally mixing it with adhesive for 1.5-2 hr, granulating, injection moulding, thermal vacuum degreasing in the mixture of absolut alcohol and vinyl trichloride, vacuum sintering, isostatic pressure treating and annealing. Its advantages are high mechanical performance and high size precision.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy forming, and in particular provides a Ti6Al4V alloy injection molding method, which realizes the preparation of low-cost and high-performance titanium alloy. Background technique [0002] Titanium and its alloys have low density, high specific strength, low elastic modulus, good high temperature strength, non-toxic and non-magnetic, excellent corrosion resistance, etc., and are widely used in petrochemical, aerospace, automobile, bioengineering (good phase Capacitance), watches, environmental protection, golf clubs and other fields, therefore, the research on this material has always been a hot spot in the field of material research. At present, the relatively mature methods for preparing Ti6Al4V mainly include vacuum melting, precision casting and powder metallurgy. There are defects in the processes of smelting and precision casting, such as easy segregation of components and uneven stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/00
Inventor 曲选辉郭世柏秦明礼何新波段柏华汤春峰
Owner UNIV OF SCI & TECH BEIJING
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