Method for preparing titanium-based workpiece based on micro spherical titanium-based powder and titanium-based workpiece
A powder preparation, titanium-based technology, applied in the field of powder metallurgy, can solve the problems such as the difficulty in effectively utilizing the remaining powder, affecting the green and healthy development of the powder titanium industry, and the waste of titanium resources, achieving efficient recycling, improving compatibility, adding high value effect
Active Publication Date: 2022-07-01
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
At present, these powders are generally sold at a low price for civilian products such as fireworks, chemical additives, or remelted into ingots, resulting in a great waste of titanium resources and affecting the green and healthy development of the powdered titanium industry.
At present, the annual production capacity of spherical titanium powder in my country has reached 2,000 tons, which will produce a large amount of surplus powder that is difficult to effectively use
Method used
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Embodiment 1
[0066] The fine spherical Ti-6Al-4V alloy powder with a median particle size of 14.5 μm and an oxygen content of 0.14 wt.% was used as the raw material, and it was placed in a vacuum constant temperature drying oven at 80 °C for 8 h to obtain pure and dry fine spherical Ti-6Al-4V alloy powder.
[0067] Weigh zirconia grinding balls and CaC in a glove box protected by an argon atmosphere according to the ratio of 5:1. 2 The powder is loaded into the ball mill jar, and the n-hexane protection liquid is added to the ball mill jar to immerse the CaC 2 The powder and grinding balls are then filled with argon protective gas into the ball mill tank and sealed. Finally, the sealed ball mill tank is put into the ball mill for ball milling treatment. The ball milling speed is 1000r / min. Oxygen adsorbent slurry was obtained after ball milling for 8 hours. Put the ball mill jar into an argon protected glove box or open it in a vacuum environment, take out the oxygen adsorbent slurry and...
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Abstract
The invention provides a method for preparing a titanium-based workpiece based on fine spherical titanium-based powder and the titanium-based workpiece. The method comprises the following steps that composite powder and a binding agent are mixed according to a certain proportion and crushed into granular feed; the granular feed is sequentially subjected to injection molding, degreasing and sintering treatment, and a titanium-based workpiece is prepared; wherein the composite powder is prepared by uniformly mixing fine spherical titanium-based powder and oxygen adsorbent powder; the oxygen adsorbent powder is at least one of CaC2, CaB6, LaB6 and CeSi2; the binder comprises the following components in percentage by mass: 75-85% of polyformaldehyde, 3-8% of high-density polyethylene, 3-8% of ethylene-vinyl acetate copolymer, 5-10% of stearic acid and 0.5-3% of thermoplastic acrylic resin. The invention provides an efficient recycling and reusing method for the micro spherical titanium-based powder, and near net shape manufacturing of high-added-value titanium products is achieved.
Description
technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a method for preparing a titanium-based part based on fine spherical titanium-based powder, and a titanium-based part. Background technique [0002] Titanium alloys have excellent comprehensive mechanical properties such as high specific strength, good corrosion resistance, small thermal expansion coefficient, good biocompatibility, and no brittleness at low temperatures. Value. Additive manufacturing has unique advantages in design freedom, complex part forming and material utilization, and has become a very promising titanium alloy manufacturing technology. High-quality spherical powder is the basis of titanium alloy additive manufacturing technology, and it is also the key to determining the cost and performance of its parts. In the past few years, my country's high-quality spherical titanium powder has been dependent on foreign imports, and the price is as high as...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B22F3/22B22F1/103B22F1/065B22F3/10C22C1/05C22C14/00C22C32/00
CPCC22C1/058B22F3/225B22F3/1025C22C14/00C22C32/0005Y02P10/25
Inventor 路新潘宇刘艳军孙健卓
Owner UNIV OF SCI & TECH BEIJING