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Powder metallurgy production method of internal helical gear

A powder metallurgy and production method technology, applied in the field of powder metallurgy production of internal helical gears, can solve the problems of low efficiency, high cost, low material utilization rate, etc., and achieve high product precision, high production efficiency, and high material utilization rate. Effect

Inactive Publication Date: 2009-07-08
扬州保来得科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional production method of internal helical gears is made by machining. The disadvantages of this production method are low efficiency, high cost and low material utilization rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Put 86gFe, 1gC, 7gNi, 1gMo and 5gCu mixed metal powder raw materials into the mold of the powder extrusion molding machine to rotate and extrude to form a shaped green body; next, place the above-mentioned shaped green body in a high-temperature mesh belt furnace Medium sintering, after a 5-minute preheating stage for the formed green body, the high-temperature mesh belt furnace gradually raises the temperature to 1100°C, keeps the temperature at 1100°C for 20 minutes, and gradually cools to room temperature under a protective atmosphere; the CO in the sintering atmosphere 2 The content is controlled at 0.3-0.5%; the temperature range in the preheating stage is 600-800°C. Finally, the sintered product is placed in a C infiltration furnace for infiltration treatment. After the sintered product is kept at 700°C for 100 minutes, it is quenched and tempered.

[0014] The key technical indicators of the product in this embodiment are shown in the table below:

[0015] ...

Embodiment 2

[0017] Put 89gFe, 0.75gC, 5.5gNi, 0.75gMo and 4gCu mixed metal powder raw materials into the mold of the powder extrusion molding machine to rotate and extrude to form a shaped green body; next, put the above-mentioned shaped green body at high temperature Sintering in a mesh belt furnace. After a 6-minute preheating stage for the formed green body, the high-temperature mesh belt furnace gradually raises the temperature to 1150°C, keeps the temperature at 1150°C for 27 minutes, and gradually cools to room temperature under a protective atmosphere; the CO in the sintering atmosphere 2 The content is controlled at 0.3-0.5%; the temperature range in the preheating stage is 600-800°C. Finally, the sintered product is placed in a C infiltration furnace for infiltration treatment. After the sintered product is kept at 750°C for 105 minutes, it is quenched and tempered.

[0018] The key technical indicators of the product in this embodiment are shown in the table below:

[0019] ...

Embodiment 3

[0021] Put 92g Fe, 0.5gC, 4gNi, 0.5g Mo and 3gCu mixed metal powder raw materials into the mold of the powder extrusion molding machine to rotate and extrude to form a shaped green body; next, place the above-mentioned shaped green body at high temperature Sintering in a mesh belt furnace. After the preheating period of 7 minutes for the formed green body, the high temperature mesh belt furnace is gradually heated up to 1200°C, kept at 1200°C for 33 minutes, and gradually cooled to room temperature under a protective atmosphere; the CO in the sintering atmosphere 2 The content is controlled at 0.3-0.5%; the temperature range in the preheating stage is 600-800°C. Finally, the sintered product is placed in a C infiltration furnace for C infiltration treatment. After the sintered product is kept at 800°C for 110 minutes, it is quenched and tempered.

[0022] The key technical indicators of the product in this embodiment are shown in the table below:

[0023] Segmentatio...

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Abstract

The invention relates to a powder metallurgy production method of an internal helical gear. The powder metallurgy production method comprises the following steps: 1) preparing metal powder raw materials in proportion; 2) putting the prepared metal powder raw materials into a mould of a powder extrusion moulding machine for moulding by rotary extrusion to form a mould green compact; 3) putting the mould green compact into a high temperature mesh belt furnace for sintering treatment; and 4) putting a sintered product into a carburizing furnace for carburizing treatment. The powder metallurgy production method helps produce the internal helical gear with easy production and operation, less cost, high production efficiency, high material utilization rate and high product accuracy.

Description

technical field [0001] The invention relates to a powder metallurgy production method of an internal helical gear. Background technique [0002] The traditional production method of internal helical gears is machined. The disadvantages of this production method are low efficiency, high cost and low material utilization. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a powder metallurgy production method for internal helical gears. The powder metallurgy production method is easy to operate, beneficial to cost saving, high in production efficiency, high in material utilization and high in product precision. [0004] The invention comprises the following steps: 1) preparing metal powder raw materials in proportion; 2) putting the prepared metal powder raw materials into a mold of a powder extrusion molding machine for rotary extrusion forming to form a shaped green body; 3) placing the shaped green body Carry out ...

Claims

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Application Information

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IPC IPC(8): B22F3/16B22F3/20B22F5/08
Inventor 陈家军官劲松胡云峰马华荣
Owner 扬州保来得科技实业有限公司
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