A method for injection molding of high-strength supercharger turbine impeller

A supercharger turbine and injection molding technology, which is applied in the direction of turbines, transportation and packaging, mechanical equipment, etc., can solve the problems of unsuitable mechanical properties, low requirements for mechanical properties, and limited turbine life, etc., to achieve good mechanical properties , Improve powder wettability, easy removal effect

Active Publication Date: 2019-10-29
宁国市华成金研科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, investment precision casting has been the main forming method of supercharged turbines. Since the casting process cannot completely avoid casting defects such as non-metallic inclusions, pores, shrinkage cavities, and element segregation, the further improvement of turbine life is largely limited.
Metal injection molding technology (MIM) does have some incomparable advantages compared with traditional processing methods, and can overcome the casting defects that are inevitable in the precision casting process, but the main reason that limits the development of MIM technology is: MIM technology needs to add binders and degreasing process limitations, even to a certain extent, MIM technology can solve the problem of one-time shaping of complex shapes, but it can only be used on product parts with low precision, small size, and low mechanical performance requirements, which is not suitable for application Parts with high mechanical performance requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for injection molding of a high-strength supercharger turbine wheel, comprising the following steps:

[0032] Step 1: Weigh 8 parts by weight of Al powder, 45 parts by weight of Ti powder, and 0.5 parts by weight of Nb powder, put them into a container, and pour 100 parts by weight of absolute ethanol into the container, put the container in the KQ3200B ultrasonic instrument, Use a stirrer to stir while ultrasonically vibrating for 15 minutes to fully disperse the agglomerated powder, then pour the mixture in the container into the polyurethane mixing tank, and then put in cemented carbide balls at a ball-to-material ratio of 10:1 , mixed at a uniform speed on a ball mill for 24 hours, and finally vacuum-dried in a vacuum oven for 48 hours, and after the drying was completed, mixed metal powder was obtained using a mortar;

[0033] Step 2: Adhesive batching: batching according to the following raw materials by weight for standby: 70 parts by weight of carnauba ...

Embodiment 2

[0045] A method for injection molding of a high-strength supercharger turbine wheel, comprising the following steps:

[0046] Step 1: Weigh 8 parts by weight of Al powder, 45 parts by weight of Ti powder, and 0.5 parts by weight of Nb powder, and mix B 4 C powder is added to Al powder with a mass fraction of 2.4%, and each raw material is added into a container, and 100 parts by weight of absolute ethanol is poured into the container, and the container is placed in a KQ3200B ultrasonic instrument, and stirred while using a stirrer Perform ultrasonic vibration for 15 minutes to fully disperse the agglomerated powder, then pour the mixture in the container into the polyurethane mixing tank, then put in cemented carbide balls according to the ratio of ball to material of 10:1, and mix at a uniform speed on the ball mill 24 hours, and finally use a vacuum drying oven to vacuum dry for 48 hours, and use a mortar to obtain mixed metal powder after the drying is completed;

[0047] ...

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PUM

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Abstract

A high-strength supercharger turbine impeller injection molding method, belonging to the technical field of aero-engine turbine preparation, including metal powder configuration, adhesive ingredients, primary melting, secondary melting, injection molding, solvent degreasing, thermal degreasing, sintering , solution treatment and aging treatment. By adopting the method of the invention, the mechanical properties of the turbine alloy are greatly improved through the improvement of composition uniformity and grain refinement, and the strength can meet the use requirements of the turbocharger turbine impeller. Join B 4 C powder, Ti and B at high temperature 4 C reacts to form TiB and TiC. TiB and TiC are evenly distributed on the titanium matrix, and are strengthening phases, which can improve the mechanical properties of the alloy.

Description

technical field [0001] The invention belongs to the technical field of aero-engine turbine preparation, and in particular relates to an injection molding method for a high-strength supercharger turbine impeller. Background technique [0002] The superalloy turbine is the core part of the aero-engine turbocharger, and its performance directly determines the energy-saving and emission-reduction effect of the turbocharged engine. The supercharged turbine is subjected to high temperature and high speed rotation and the alternating stress caused by the impact and vibration of the blade airflow during service, and is prone to fatigue damage. Therefore, there are strict requirements on the quality of the turbocharged turbine. For a long time, investment precision casting has been the main forming method of supercharged turbines. Since the casting process cannot completely avoid casting defects such as non-metallic inclusions, pores, shrinkage cavities, and element segregation, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F3/22B22F5/04B22F3/10B22F3/24C22C14/00C22C1/04C22C1/05C22C32/00
CPCC22C1/0458C22C1/058C22C14/00C22C32/0047B22F3/1025B22F3/225B22F3/24B22F5/04B22F2998/10B22F2003/248B22F1/103B22F1/10B22F2009/043
Inventor 程国华
Owner 宁国市华成金研科技有限公司
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