Powder metallurgy aluminum alloy chain wheel or gear and preparation method

A powder metallurgy, aluminum alloy technology, applied in the field of aluminum alloy sprockets or gears and the preparation of aluminum alloy sprockets or gears by powder metallurgy technology, can solve the problems of low hardness, complex aluminum alloy composition, narrow control range, etc. Hardness, simple preparation method, and lightweight effect

Pending Publication Date: 2021-05-07
NBTM NEW MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared aluminum alloy has high strength, good wear resistance and light weight, but the composition of the aluminum alloy is complex, and the control range of each composition is relatively narrow, and the hardness is low

Method used

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  • Powder metallurgy aluminum alloy chain wheel or gear and preparation method
  • Powder metallurgy aluminum alloy chain wheel or gear and preparation method
  • Powder metallurgy aluminum alloy chain wheel or gear and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Such as Figure 1 to Figure 4 Shown is the first preferred embodiment of the present invention.

[0036] The preparation method of the aluminum alloy sprocket of powder metallurgy of the present embodiment comprises the following steps in sequence:

[0037] 1) Mixing: put Al-27Si alloy powder, 2.6wt% electrolytic copper powder, Al-50Mg alloy powder, pure Al powder and 1.5%wt% lubricant in a mixer and stir for 45min, and the ratio is Al-15.5Si- The composition of 2.6Cu-0.65Mg, its composition design is shown in Table 1, and the powder morphology used is shown in figure 2 shown;

[0038] 2) Forming: Press the powder mixed in step 1) on a forming press to form an aluminum alloy sprocket green body, the forming pressure is 200MPa, and the forming density is 2.4g / cm3;

[0039] 3) Sintering: put the sprocket green body in step 2) into a mesh belt furnace and sinter to obtain an aluminum alloy sintered part. The sintering process includes degreasing and sintering. ℃~570℃,...

Embodiment 2

[0045] The difference between this embodiment and the above-mentioned embodiment 1 is that the forming pressure and density of step 2) are different, specifically, the forming pressure is 300Pa, and the forming density is 2.5g / cm 3 The process parameters of step 3) are different, specifically, the degreasing temperature is 450 ℃, the holding time of degreasing is 15min, the sintering temperature is 570 ℃, the holding time of sintering is 120min, the density of the product after sintering is 2.6g / cm3, sintering The HRB hardness of the as-formed product reaches 50, the solid solution temperature is 500°C, the solid solution heat preservation treatment time is 5h, the aging temperature is 200°C, the aging heat preservation time is 72h, and the HRB hardness after aging is 80; the product density of the whole form is 2.65g / cm3, HRB hardness is 80.

Embodiment 3

[0047] The difference between this embodiment and the above-mentioned embodiment 1 is that the forming pressure and density of step 2) are different, specifically, the forming pressure is 450Pa, and the forming density is 2.45g / cm 3 The process parameters of step 3) are different, specifically, the degreasing temperature is 420 ℃, the holding time of degreasing is 90min, the sintering temperature is 560 ℃, the holding time of sintering is 10min, the density of the product after sintering is 2.55g / cm3, sintering The HRB hardness of the as-state product reaches 45, the solid solution temperature is 540°C, the solid solution heat preservation treatment time is 0.5h, the aging temperature is 20°C, the aging heat preservation time is 30h, the HRB hardness after aging is 75, and the product density of the whole form is 2.6 g / cm3, HRB hardness is 70.

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Abstract

The invention relates to a powder metallurgy aluminum alloy chain wheel or gear and a preparation method, and the powder metallurgy aluminum alloy chain wheel or gear is characterized by comprising the following chemical components in percentage by mass: 0.1%-7% of Cu, 0.1%-5% of Mg, 0.1%-40% of Si, 0%-10% of Zn, 0%-1% of Sn, 0%-10% of a reinforcement phase and the balance of Al. The preparation method is simple, machining is convenient, the prepared powder metallurgy aluminum alloy chain wheel or gear is light in weight, meanwhile, the advantages of light weight, corrosion resistance and high hardness are achieved, the requirement for light weight of an automobile is met, and energy conservation and emission reduction are facilitated.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, in particular to an aluminum alloy sprocket or gear and a method for preparing the aluminum alloy sprocket or gear by adopting powder metallurgy technology. Background technique [0002] At present, reducing the total mass of the car under the premise of ensuring the safety of the car will reduce the fuel consumption of the car to a certain extent during driving, thereby reducing the consumption of primary energy. Lightweight technology is an important means to achieve energy saving and emission reduction. Lightweight technology includes lightweight design and lightweight materials. The latter mainly refers to the use of low-density, high-strength lightweight materials, among which aluminum alloy materials are one of the best choices for lightweight materials. [0003] The traditional aluminum alloy processing methods are rolling, extrusion, stretching, casting, forging, etc., and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/02C22C21/14C22C21/16C22C21/18C22F1/04C22F1/043C22F1/057B22F5/00C22C1/03
CPCB22F5/08C22C1/026C22C1/03C22C21/00C22C21/02C22C21/14C22C21/16C22C21/18C22F1/04C22F1/043C22F1/057
Inventor 杨浩包崇玺颜巍巍童璐佳
Owner NBTM NEW MATERIALS GRP
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