Preparation process of turbosuperchager nozzle ring blades for gasoline engines

A turbocharger and preparation technology, which is applied in the direction of turbines, mechanical equipment, metal processing equipment, etc., can solve the problems of low product quality stability, long production process, and increased production costs, so as to improve the one-time pass rate , Improve surface roughness, improve the effect of yield

Active Publication Date: 2018-07-24
湖南英捷高科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. The gasoline engine has a wide speed range, and the power difference in the entire speed range is relatively large
In order to meet the requirements of use, the surface of the parts needs to be polished, but it is difficult to perform grinding and polishing on the connecting parts, resulting in a long production process, low product quality stability, and a significant increase in production costs.
[0010] Due to the surface roughness and density of the parts prepared by the MIM process have certain defects, therefore, in the prior art, the preparation of the turbocharger nozzle ring blades for gasoline engines is usually carried out by machining process, which has complex processes and long process routes. , High production cost defects

Method used

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  • Preparation process of turbosuperchager nozzle ring blades for gasoline engines
  • Preparation process of turbosuperchager nozzle ring blades for gasoline engines
  • Preparation process of turbosuperchager nozzle ring blades for gasoline engines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1. Powder gradation: coarse powder 95%, micro powder 5%;

[0055] 2. Refining feed and injection molding blank

[0056] 2.1 The amount of binder added is 5%

[0057] 2.2 The banburying temperature is 150°C, the speed of the banbury mixer is 60r / min, and the banburying time is 1.5h;

[0058] 2.3 The injection temperature is 165°C, the injection pressure is 120Mpa, and the mold temperature is 50-60°C;

[0059] 3. Ultrasonic activation of skim base

[0060] 3.1 Degreasing process: heat to 160-180°C at a heating rate of 3°C-4°C / min, keep warm for 150-155 minutes, then heat to 320°C at a heating rate of 4-5°C / min, and keep warm for 160 minutes;

[0061] 3.2 Ultrasonic activation process: ultrasonic intensity is 0.4-0.5W / cm 2 , the ultrasonic time is 0.75h;

[0062] 4. Sintering process

[0063] The sintering temperature is 1200-1320°C, the heating rate is 5-7°C / min, and the holding time is 120 minutes.

Embodiment 2

[0065] 1. Powder gradation: coarse powder 90%, micro powder 10%;

[0066] 2. Refining feed and injection molding blank

[0067] 2.1 The amount of binder added is 10%

[0068] 2.2 The banburying temperature is 140°C, the speed of the banbury mixer is 40r / min, and the banburying time is 1h;

[0069] 2.3 The injection temperature is 140°C, the injection pressure is 80Mpa, and the mold temperature is 40-60°C;

[0070] 3. Ultrasonic activation of skim base

[0071] 3.1 Degreasing process: heat to 160-180°C at a heating rate of 3°C-4°C / min, hold for 160-170 minutes, then heat to 340°C at a heating rate of 4-5°C / min, and hold for 180 minutes;

[0072] 3.2 Ultrasonic activation process: ultrasonic intensity is 0.4-0.5W / cm 2 , the ultrasonic time is 0.75h;

[0073] 4. Sintering process

[0074] The sintering temperature is 1200-1320°C, the heating rate is 5-7°C / min, and the holding time is 120 minutes.

Embodiment 3

[0076] 1. Powder gradation: coarse powder 85%, micro powder 15%;

[0077] 2. Refining feed and injection molding blank

[0078] 2.1 The amount of binder added is 20%

[0079] 2.2 The banburying temperature is 120°C, the speed of the banbury mixer is 40r / min, and the banburying time is 1h;

[0080] 2.3 The injection temperature is 120°C, the injection pressure is 60Mpa, and the mold temperature is 30-50°C;

[0081] 3. Ultrasonic activation of skim base

[0082] 3.1 Degreasing process: heat up to 160-180°C at a heating rate of 3°C-4°C / min, hold for 170-180 minutes, then heat to 350°C at a heating rate of 4-5°C / min, and hold for 180 minutes;

[0083] 3.2 Ultrasonic activation process: ultrasonic intensity is 0.4-0.5W / cm 2 , the ultrasonic time is 1h;

[0084] 4. Sintering process

[0085] The sintering temperature is 1200-1320°C, the heating rate is 5-7°C / min, and the holding time is 120 minutes.

[0086] As can be seen from Table 2 and 3, the present invention has the fol...

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Abstract

A preparation process of turbosuperchager nozzle ring blades for gasoline engines comprises the steps of powder grading, refining feeding, formed blank injection, degreased blank ultrasonic activationand sintering. The HK-30 stainless steel turbosuperchager nozzle ring blade parts are prepared through a powder injection forming technology, coarse powder and fine powder are used in cooperation, the strength of green bodies is effectively improved, the surface roughness is finally improved, the product surface smoothness is controlled to be within Ra0.1, subsequent processing shaping is omitted, the blade airflow conversion efficiency is improved, the technical process is effectively shortened, the production cost is reduced, and the product qualified rate is improved; power surface activity is improved through ultrasonic waves, a sintering window is broadened, and the rate of finished products is effectively increased; and the preparation process is quite suitable for preparing the precise complex turbosuperchager nozzle ring blade parts for the gasoline engines.

Description

technical field [0001] The invention discloses a process for preparing nozzle ring blades of a turbocharger for a gasoline engine, and belongs to the technical field of powder metallurgy preparation. Background technique [0002] The turbocharger can comprehensively improve the overall performance of the engine such as power, economy and emission indicators, inject strong power into the engine, and better meet the requirements of the new Euro III and Euro IV emission standards. The development history of gasoline engine turbocharging is also the development history of miniaturized high-performance supercharger. With the gradual improvement of various performance indicators of turbochargers, the reduction of production costs, the improvement of reliability, and the miniaturization and generalization of turbochargers, the supercharging technology of gasoline engines has also been greatly developed. Due to the mature application of electronic gasoline injection technology, mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/22B22F1/00B22F3/10B22F5/04
CPCB22F3/1007B22F3/1025B22F3/225B22F5/04B22F2999/00B22F2998/10B22F1/052B22F1/103B22F1/10B22F2201/20
Inventor 何浩李益民陈永志余勇胡幼华
Owner 湖南英捷高科技有限责任公司
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