High-performance powder forging alloy material and preparation method thereof

A technology of powder forging and alloy materials, which is applied in the field of alloy forging, can solve the problems of low mechanical properties and incompetence, and achieve the effect of satisfying mechanical properties and precision

Inactive Publication Date: 2019-11-12
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existence of holes leads to low mechanical properties, and it is not suitable for more severe working conditions.

Method used

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  • High-performance powder forging alloy material and preparation method thereof
  • High-performance powder forging alloy material and preparation method thereof
  • High-performance powder forging alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1) Weigh 97.8% of elemental Fe, 1.6% of elemental Ni, and 0.6% of elemental Mo, melt and prepare Fe-Ni-Mo alloy, and then prepare Fe-Ni-Mo alloy by gas atomization or water atomization The obtained Fe-Ni-Mo alloy powder has a particle size of 25um-175um.

[0048] 2) Add 1% elemental Cu powder and 0.6% elemental C powder to the Fe-Ni-Mo alloy powder, and add 0.2% zinc stearate binder. Mix with a mixer at a speed of 60 revolutions per minute for 20 minutes to make the powder particles evenly distributed.

[0049] 3) Determine the size of the gear prepress according to the Deform finite element simulation software, design the cold press mold, and press the evenly distributed powder obtained in step 2) under 500MPa for 2 seconds for cold press forming to obtain the preset shape and Density of cold-pressed gear parts; among them, the factors affecting the size of the preform include changes in density during sintering, changes in density during partial forging, and changes ...

Embodiment 2

[0055] 1) Weigh 98.2% of elemental Fe, 1% of elemental Ni, and 0.8% of elemental Mo, melt and prepare Fe-Ni-Mo alloy, and then prepare Fe-Ni-Mo alloy by gas atomization or water atomization The obtained Fe-Ni-Mo alloy powder has a particle size of 25um-175um.

[0056] 2) Add 1.2% elemental Cu powder and 0.65% elemental C powder to Fe-Ni-Mo alloy powder, and add 0.3% zinc stearate binder. Mix with a mixer at a speed of 60 revolutions per minute for 20 minutes to make the powder particles evenly distributed.

[0057] 3) Determine the size of the gear prepress according to the Deform finite element simulation software, design the cold press mold, and press the evenly distributed powder obtained in step 2) under 500MPa for 2 seconds for cold press forming to obtain the preset shape and Density of cold-pressed gear parts; among them, the factors affecting the size of the preform include changes in density during sintering, changes in density during partial forging, and changes in ...

Embodiment 3

[0063] 1) Weigh 97.2% of elemental Fe, 2% of elemental Ni, and 0.8% of elemental Mo, melt and prepare Fe-Ni-Mo alloy, and then prepare Fe-Ni-Mo alloy by gas atomization or water atomization The obtained Fe-Ni-Mo alloy powder has a particle size of 25um-175um.

[0064] 2) Adding 1.5% elemental Cu powder and 0.8% elemental C powder to Fe-Ni-Mo alloy powder, and adding 0.5% zinc stearate binder. Use a mixer to mix the mixture for 25 minutes at a speed of 60 revolutions per minute to make the powder particles evenly distributed.

[0065] 3) Determine the size of the gear prepress according to the Deform finite element simulation software, design the cold press mold, and press the evenly distributed powder obtained in step 2) under 600MPa for 2 seconds for cold press forming to obtain the preset shape and Density of cold-pressed gear parts; among them, the factors affecting the size of the preform include changes in density during sintering, changes in density during partial forgi...

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Abstract

The invention discloses a high-performance powder forging alloy material and a preparation method thereof. The material comprises the following components of 1%-2% of Ni, 0.3%-0.8% of Mo, 0.8%-1.5% ofCu, 0.6-0.8% of C, 0.1%-0.5% of a binding agent and the balance Fe and impurities. According to the material, an existing powder forging material PF46 xx system raw material is optimized so as to obtain the material with the better performance, existing small-modulus gears are machined and formed, for a flexible material (HRC is equal to 30 or so), the subsequent carburization treatment can causeprecision reduction, so that the requirements cannot be met, for a harder material (HRC is greater than 50), machining is difficult or cannot be conducted at all, heavy-load gears with the small modulus can be manufactured by utilizing the components of the material and the powder forging method, the mechanical property can be met, and the precision requirements can further be met.

Description

【Technical field】 [0001] The invention belongs to the field of alloy forging, and relates to a high-performance powder forging alloy material and a preparation method thereof. 【Background technique】 [0002] Existing gears are usually prepared by machining, hot forging and powder metallurgy. Mechanically processed gears have a long preparation cycle, and operations such as grinding and hobbing can only be performed on softer materials. Coating, carburizing and other surface treatments are carried out after the gear is formed to improve its hardness and wear resistance. And the mechanical processing method has a low utilization rate of materials. However, hot forging gears consume a lot of energy and have low surface accuracy, and some small-sized gears are not easy to perform hot forging operations. [0003] Especially for heavy-duty gears with small modulus, not only high precision is required, but also high mechanical properties are required. For some existing gear mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/02B22F3/10B22F9/08C22C38/08C22C38/12C22C38/16
CPCB22F9/082B22F3/02B22F3/10C22C38/08C22C38/12C22C38/16B22F1/102
Inventor 江峰王邃孙军
Owner XI AN JIAOTONG UNIV
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