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Manufacture process of changeable geometrical cross-section turbocharger nozzle blade

A technology of turbocharger and preparation process, used in turbines, mechanical equipment, machines/engines, etc., can solve the problems of poor melt feeding ability, low product accuracy, poor performance, etc., and achieve uniform feeding. Effect

Active Publication Date: 2011-10-12
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

However, due to the extremely high melting and casting temperature of the material, the chemical properties of the melt are active, and the fluidity is poor, it is very difficult to fill the blades with extremely thin wall thickness; The metal cannot fill the mold cavity completely and evenly, and the precision of the obtained product is not high; the melt feeding ability is poor, and shrinkage defects are prone to occur, which leads to casting scrap; Instability of sex and performance, even after annealing treatment, the stress generated during the phase transition is large, the performance is not good, the reliability of the product is low, and the process cost is high

Method used

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  • Manufacture process of changeable geometrical cross-section turbocharger nozzle blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation process of the nozzle ring vane of the variable geometry cross-section turbocharger is as follows:

[0035] Raw material preparation: The powder raw material used in the present invention is HK30 aerosolized powder provided by Osprey Company of the United Kingdom. The chemical composition of the powder is shown in Table 1. figure 1 It is the SEM image of the raw material powder, and its particle size distribution is as follows: figure 2 shown. In order to improve product performance, 1.5% of high-carbon affinity element Ti is added by weight percentage, and its morphology is as follows image 3 shown.

[0036] Table 1 Chemical composition of HK30 powder

[0037]

[0038] Preparation of binding agent: by weight percentage, get polyethylene glycol 10%, vegetable oil 30%, polyethylene 10%, polypropylene 5%, paraffin 45%, put in blade mixer, mix at 140 ℃ temperature 1 hour.

[0039] Preparation of feed: According to the mass ratio of 95:5%, weigh t...

Embodiment 2

[0046] The preparation process of the nozzle ring vane of the variable geometry cross-section turbocharger is as follows:

[0047] Raw material preparation: The powder raw material used in the present invention is HK30 aerosolized powder provided by Osprey Company of the United Kingdom. The chemical composition of the powder is shown in Table 1. In order to improve product performance, 1.0% of high-carbon affinity element Ti is added by weight percentage;

[0048] Preparation of binding agent: by weight percentage, get polyethylene glycol 15%, vegetable oil 30%, polyethylene 10%, polypropylene 20%, paraffin 25%, put in blade mixer, mix at 150 ℃ temperature 1.5 hours.

[0049] Preparation of feed: According to the mass ratio of 85:15%, weigh the binder and mix with HK30 and Ti powder. The mixing temperature is 130°C, the speed of the mixer is 70r / min, and the mixing time is 2.0 h. The uniformity of feeding is judged by capillary rheometer and scanning electron microscope. ...

Embodiment 3

[0054] The preparation process of the nozzle ring vane of the variable geometry cross-section turbocharger is as follows:

[0055] Raw material preparation: The powder raw material used in the present invention is HK30 aerosolized powder provided by Osprey Company of the United Kingdom. The chemical composition of the powder is shown in Table 1. In order to improve product performance, 0.5% of high-carbon affinity element Ti is added by weight percentage;

[0056] Preparation of binding agent: by weight percentage, get polyethylene glycol 15%, vegetable oil 15%, polyethylene 15%, polypropylene 20%, paraffin 35%, put in blade mixer, mix at 155 ℃ temperature 1.5 hours.

[0057] Preparation of feed: According to the mass ratio of 90:10%, weigh the binder and mix with HK30 and Ti powder. The mixing temperature is 170°C, the speed of the mixer is 50r / min, and the mixing time is 1.0 h. The uniformity of the feed is judged by the capillary rheometer and the scanning electron micr...

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Abstract

The invention discloses a manufacture process of a changeable geometrical cross-section turbocharger nozzle blade. The manufacture process comprises the steps of: adding 0.2-1.5% of Ti into HK30 aerosol powders; mixing 10-15% of polyethylene glycol, 15-30% of vegetable oil, 10-15% of polyethylene, 5-20% of polypropylene and 25-45% of paraffin wax for 1-2 hours at 140-160 DEG C; mixing weighed (80-95):(20-45)% binder with the HK30 and Ti powders, wherein the mixing temperature is 130-170 DEG C, the rotation speed of a mixing mill is 50-70r / min, the mixing time is 1.0-2.0 hours, and the mixture is prepared to be feedings after being cooled and crushed; injecting the manufactured feedings into an injection molding machine, wherein the injection temperature is 120-165 DEG C, the injection pressure is 60-120MPa, the mold temperature is 30-60 DEG C, and blanks are injection molded; dissolving the paraffin wax and vegetable oil components of the blanks, and degreasing after the blanks are dried; heating up to 840-860 DEG C at a speed of 8-12 DEG C / min for presintering; heating up the blanks to W-E DEG C at a speed of 5-9 DEG C / min, and cooling the blanks with the furnace after the temperature is maintained for Y-T minutes. The product in the invention has the advantages of high size precision and surface precision, high thermal fatigue resistance and long service life.

Description

technical field [0001] The invention relates to a preparation process of a nozzle ring vane, in particular to a preparation process of a nozzle ring vane of a variable geometry section turbocharger. Background technique [0002] The variable geometry 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. Its main working principle is to change the cross-sectional size of the turbine nozzle by adjusting the angle of the turbine inlet guide vane, and then adjust the boost pressure. When the engine is in idling or low speed condition, the nozzle blades are closed or the nozzle section is very small, even at this time the low exhaust gas flow can accelerate the impeller quickly, thereby increasing the low speed torque of the engine and improving the performance of the engine Low-speed re...

Claims

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Application Information

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IPC IPC(8): B22F5/04B22F3/115F01D9/02F02B37/00
CPCY02T10/12
Inventor 李益民何浩邓忠勇雷浩
Owner 湖南英捷高科技有限责任公司
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