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Composite structure enhanced dual-material powder forging part and preparation method thereof

A technology of powder metallurgy and composite structure, applied in the field of powder metallurgy, can solve the problems of waste, low performance requirements of the core parts of parts, high cost, etc., and achieve the effects of reducing waste, avoiding insufficient diffusion, and enhancing bonding

Inactive Publication Date: 2018-06-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Generally speaking, when parts are in service, part of the surface area directly bears complex loads such as heat, force, electricity, and the environment, so high requirements are placed on the comprehensive performance of the surface layer, but the performance requirements for the core of the part are often not High, usually meet the strength requirements required for structural stability; when using the same material as a whole to manufacture parts, in order to meet service requirements, specific alloying work is required, and the cost of raw materials is relatively high, but in actual service, parts often It is scrapped only because the surface or local damage does not meet the conditions for continued service, but at this time the whole is far from invalid, resulting in a large waste, so the overall manufacturing of the same material is not only costly, but also unnecessary

Method used

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  • Composite structure enhanced dual-material powder forging part and preparation method thereof
  • Composite structure enhanced dual-material powder forging part and preparation method thereof
  • Composite structure enhanced dual-material powder forging part and preparation method thereof

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preparation example Construction

[0040] The invention relates to a dual-material powder metallurgy forging part with a composite reinforced structure and a preparation method thereof. Parts include at least a functional layer 1 and a supporting layer 2, and the supporting layer 2 is set in the functional layer 1; the functional layer 1 is an alloy with excellent comprehensive properties, which is selected according to the material performance requirements of the specific use environment, and the specific properties include strength / specific strength , hardness, wear resistance, corrosion resistance, electrical conductivity, thermal conductivity, etc. The support layer 2 is selected according to the requirements of the stable structure. The basic requirements only include strength indicators, and other additional requirements are determined according to the use environment and with reference to the functional layer 1.

[0041] The connection between the functional layer 1 and the support layer 2 realizes the n...

Embodiment 1

[0050] Embodiment 1 (Fe-Ni-Mo-Cu and Fe-C-Cu composite structure gear)

[0051] 1) Directly use a commercially available profile with the same composition as the functional layer, and process it into the required shape and internal structure according to the design drawings; Fe-Ni-Mo-Cu profile composition mass percentage: nickel 1-2%, molybdenum 0.4 -0.6%, copper 0.8-1%, graphite 0.5-0.64%, lubricant 0.45-0.6%, and the balance is iron; the obtained functional layer is as figure 1 shown;

[0052] 2) Fe-C-Cu composition mass percentage: copper 1-2%, graphite 0.5-0.64%, lubricant 0.45-0.6%, the balance is iron, weigh the raw material powder according to the above-mentioned composition respectively, fully in the powder mixer well mixed;

[0053] 3) Determine the size of the support layer and the amount of raw materials according to the Deform finite element simulation software. In the cavity of the cold press mold, the inner side of the functional layer processed in step 1) is ...

Embodiment 2

[0056] Embodiment 2 (Fe-Ni-Mo-Cu and Fe-C-Cu composite structure gear)

[0057] 1) Fe-Ni-Mo-Cu composition mass percentage: nickel 1-2%, molybdenum 0.4-0.6%, copper 0.8-1%, graphite 0.5-0.64%, lubricant 0.45-0.6%, the balance is iron; Fe -C-Cu component mass percentage: copper 1.00-2.00%, graphite 0.5-0.64%, lubricant 0.45-0.6%, and the balance is iron. Weigh the raw material powders according to the above ingredients, and mix them fully and evenly in the powder mixer;

[0058] 2) According to the size of the functional layer and the amount of raw materials determined by the Deform finite element simulation software, put the premixed Fe-Ni-Mo-Cu powder into the powder injection molding machine, the preheating temperature is 150°C, the injection temperature is 200°C, and Injection molding in the mold cavity to obtain the functional layer; the obtained functional layer is as follows figure 1 shown;

[0059] 3) According to the size of the support layer and the amount of raw m...

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Abstract

The invention discloses a composite structure enhanced dual-material powder forging part and a preparation method thereof. The part at least comprises a function layer and a supporting layer, materials are selected according to different requirements of the environment for the function layer and the supporting layer, in other words, materials are selected as needed, and therefore the whole utilization rate of the materials is increased, unnecessary waste is lowered, and the production cost is lowered. The specific size of the supporting layer and the function layer is simulated by means of deform simulation software, and the composite structure enhanced dual-material powder forging part is obtained through the five steps of laying powder into a cold pressing mold cavity, cold pressing thepowder part, performing sintering, performing hot forging and performing shot blasting, and the method is suitable for large-scale production, economical and efficient.

Description

【Technical field】 [0001] The invention belongs to the field of powder metallurgy, and relates to a dual-material powder metallurgy forging part reinforced by a composite structure and a preparation method thereof. 【Background technique】 [0002] Generally speaking, when parts are in service, part of the surface area directly bears complex loads such as heat, force, electricity, and the environment, so high requirements are placed on the comprehensive performance of the surface layer, but the performance requirements for the core of the part are often not High, usually meet the strength requirements required for structural stability; when using the same material as a whole to manufacture parts, in order to meet service requirements, specific alloying work is required, and the cost of raw materials is relatively high, but in actual service, parts often It is scrapped only because the surface or local damage does not meet the conditions for continued service, but at this time t...

Claims

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Application Information

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IPC IPC(8): B22F5/08B22F7/06B22F7/08
CPCB22F5/08B22F7/06B22F7/08B22F2998/10B22F2009/041B22F3/225B22F3/02B22F3/1021B22F2003/175B22F2003/247
Inventor 江峰王邃吴亚科王华磊王琪孙军张广明
Owner XI AN JIAOTONG UNIV
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