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Novel powder metallurgy production process of high-performance automobile synchronizer gear ring

A synchronizer gear ring and powder metallurgy technology, which is applied in the field of new powder metallurgy production technology of high-performance automobile synchronizer gear ring, can solve the problems of high manufacturing cost, low material utilization rate, complex machining process, etc., and achieve low cost , low scrap rate, and the effect of improving product precision

Inactive Publication Date: 2019-06-07
江苏智造新材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The machining process of this preparation method is particularly complicated, the process is long, the efficiency is low, the utilization rate of materials is extremely low, a large amount of expensive non-ferrous metals such as copper, nickel, and cobalt are consumed, and the production cost is extremely high.

Method used

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  • Novel powder metallurgy production process of high-performance automobile synchronizer gear ring
  • Novel powder metallurgy production process of high-performance automobile synchronizer gear ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1. Select the domestic water atomized AISI4600 low-alloy steel powder with good cost performance and good pressing, sintering and forging process performance as the alloy powder raw material, and mix it evenly.

[0045] 2. Using the simple shape preform design scheme, the alloy powder is pressed and formed on the forming machine, and the forming density is 6g / cm 3 , The quality deviation is controlled at ±0.5%.

[0046] 3. Sinter the preform at 1100°C in a non-oxidizing environment until it is completely alloyed, and then move the sintered body into a holding furnace at 1000°C in a non-oxidizing atmosphere for heat preservation.

[0047] 4. Quickly move the preform to the forging die which has been preheated at 250°C. The exposure time in the air is controlled within 5 seconds. The forging temperature is 910°C. After the forging is released from the mold, it is slowly cooled in a sandbox. It is then machined using a CNC machine.

[0048] 5. Spray the molybdenum spray ...

Embodiment 2

[0050] 1. Select the domestic water atomized AISI4600 low-alloy steel powder with good cost performance and good pressing, sintering and forging process performance as the alloy powder raw material, and mix it evenly.

[0051] 2. Using the simple shape preform design scheme, the alloy powder is pressed and formed on the forming machine, and the forming density is 7g / cm 3 , The quality deviation is controlled at ±0.5%.

[0052] 3. The preform is sintered at 1130°C in a non-oxidizing environment until it is completely alloyed, and then the sintered body is moved into a holding furnace at 1000°C in a non-oxidizing atmosphere for heat preservation.

[0053] 4. Quickly move the preform to the preheated forging die at 260°C. The exposure time in the air is controlled within 5 seconds. The forging temperature is 950°C. After the forging is released from the mold, it is slowly cooled in a sandbox. It is then machined using a CNC machine.

[0054] 5. Spray the molybdenum spray layer ...

Embodiment 3

[0056] 1. Select the domestic water atomized AISI4600 low-alloy steel powder with good cost performance and good pressing, sintering and forging process performance as the alloy powder raw material, and mix it evenly.

[0057] 2. Using the simple shape preform design scheme, the alloy powder is pressed and formed on the forming machine, and the forming density is 6.5g / cm 3 , The quality deviation is controlled at ±0.5%.

[0058] 3. The preform is sintered at 1120°C in a non-oxidizing environment until it is completely alloyed, and then the sintered body is moved into a holding furnace at 1000°C in a non-oxidizing atmosphere for heat preservation.

[0059] 4. Quickly move the preform to the forging die that has been preheated at 300°C. The exposure time in the air is controlled within 5 seconds. The forging temperature is 900°C. After the forging is released from the mold, it is slowly cooled in a sand box. It is then machined using a CNC machine.

[0060] 5. Spray the molybd...

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Abstract

The invention provides a novel powder metallurgy production process of a high-performance automobile synchronizer gear ring. The production process comprises: a material mixing step, comprising preparing alloy powder raw materials; a preform pressing step, comprising pressing and forming the alloy powder raw materials on a forming machine according to a preform design scheme; a preform sintering and heat preserving step, comprising sintering the preform until completely alloying and transferring to a heat-preserving furnace to perform heat preservation; a forging and machining step, comprisingforging the preform by a hot upset forging process and then machining; and a molybdenum spraying step, comprising spray-coating an inner hole conical surface with a molybdenum spraying layer. The production process has the characteristics of low cost, short process flow, high material utilization rate, suitability for mass production, stable product quality, low rejection rate and the like.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy auto parts, in particular to a novel powder metallurgy production process for a gear ring of a high-performance automobile synchronizer. Background technique [0002] The synchronizer ring is an important part of the transmission. It can not only make the gear shifting smooth, labor-saving and convenient, but also reduce the shock and noise of the gear shift and save fuel consumption. However, the shape of the synchronizer gear ring is relatively complex, requiring high dimensional accuracy, and high requirements for wear resistance and mechanical properties. The traditional automobile synchronizer gear ring production process is to use wear-resistant copper alloy pipes, which are produced by turning blanking, cutting inner and outer contours, EDM spline teeth, subsequent machining and inspection. The machining process of this preparation method is particularly complicated, the process ...

Claims

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Application Information

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IPC IPC(8): B22F5/08C22C38/02C22C38/04C22C38/08C22C38/12C22C38/60B22F3/02B22F3/10B22F3/17B22F3/24
Inventor 施昌旭夏敏石小荣黄亿奇张艳伟
Owner 江苏智造新材有限公司
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