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Iron-aluminum composite reinforced aluminum-based material, its preparation method and application

An aluminum-based material, iron-aluminum alloy technology, applied in the coating process of metal materials, brake discs, mechanical equipment, etc., can solve problems such as coating cracks and thermal and physical properties mismatch

Active Publication Date: 2021-09-14
HUNAN JINTIAN ALUMINUM HI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the mismatch between the thermal and physical properties of the laser cladding powder and the substrate can easily lead to defects such as cracks in the coating, which is fatal in the application of brake discs

Method used

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  • Iron-aluminum composite reinforced aluminum-based material, its preparation method and application
  • Iron-aluminum composite reinforced aluminum-based material, its preparation method and application
  • Iron-aluminum composite reinforced aluminum-based material, its preparation method and application

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preparation example Construction

[0032] A method for preparing an iron-aluminum alloy composite strengthened aluminum matrix composite material in an embodiment includes the following steps S110-S140:

[0033] S110, in a protective gas atmosphere, ball mill and mix Fe powder, Al powder, amorphous B powder and Zr powder in proportion to obtain Fe 3 Al alloy raw material powder.

[0034] It should be noted that in step S110, by controlling the mixing ratio of Fe powder and Al powder, to mainly generate Fe with DO3 structure 3 Al phase. In addition, by adding an appropriate amount of amorphous B powder and Zr powder, Zr reacts with B to generate ZrB 2 , to improve the Fe 3 The grain structure of the Al alloy avoids the occurrence of brittle fracture.

[0035] In this embodiment, Fe 3 In Al alloy raw material powder, the mass ratio of Fe powder to Al powder is (4~7):1, and the mass ratio of amorphous B powder accounts for Fe 3 0.02% to 2% of the total mass of Al alloy raw material powder, and the mass of Zr...

Embodiment 1

[0062] (1) In an argon atmosphere, ball mill and mix 850g Fe powder, 150g Al powder, 8g amorphous B powder and 1g Zr powder to obtain Fe 3 Al alloy raw material powder.

[0063] (2) In an argon atmosphere, mix 750g Fe powder, 250g Al powder, 10g amorphous B powder and 100g Al 2 o 3 The particles are ball milled and mixed to obtain FeAl alloy raw material powder.

[0064] (3) the above Fe 3 Al alloy raw material powder is paved on the surface of Al-Fe-V-Si aluminum alloy, laser cladding is carried out in an argon protective atmosphere, and then annealed at 450°C for 2 hours to obtain metallurgically bonded Fe 3 Al alloy layer and aluminum base alloy layer. Among them, the conditions of laser cladding are: the laser power is 3kw, the scanning speed is 300mm / s, and the spot diameter is 3mm.

[0065] (4) lay the above-mentioned FeAl alloy raw material powder on Fe 3The surface of the Al alloy layer is laser clad in an argon protective atmosphere and then annealed at 200°C to...

Embodiment 2

[0071] (1) In an argon atmosphere, ball mill and mix 850g Fe powder, 150g Al powder, 12g amorphous B powder and 10g Zr powder to obtain Fe 3 Al alloy raw material powder.

[0072] (2) In an argon atmosphere, mix 700g of Fe powder, 300g of Al powder, 15g of amorphous B powder and 50g of Al 2 o 3 The particles are ball milled and mixed to obtain FeAl alloy raw material powder.

[0073] (3) the above Fe 3 Al alloy raw material powder is paved on the surface of Al-Fe-V-Si aluminum alloy, and annealed at 300°C for 3 hours after laser cladding to obtain metallurgically bonded Fe 3 Al alloy layer and aluminum base alloy layer. Among them, the conditions of laser cladding are: the laser power is 3kw, the scanning speed is 250mm / s, and the spot diameter is 3mm.

[0074] (4) lay the above-mentioned FeAl alloy raw material powder on Fe 3 The surface of the Al alloy layer is annealed at 300°C after laser cladding to obtain an iron-aluminum composite strengthened aluminum-based mater...

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Abstract

The application relates to an iron-aluminum alloy composite strengthened aluminum-based material, its preparation method and application. The material includes an aluminum-based alloy layer, Fe metallurgically bonded to the aluminum-based alloy layer 3 Al alloy layer and Fe 3 Al alloy layer metallurgically bonded FeAl alloy layer, Fe 3 The Al alloy layer is mainly composed of Fe 3 Al phase and ZrB 2 Phase composition, the FeAl alloy layer is mainly composed of FeAl phase, B phase and Al 2 o 3 phase composition. The above-mentioned iron-aluminum alloy composite strengthened aluminum-based material not only possesses the excellent high-temperature mechanical properties, corrosion resistance and wear resistance of iron-aluminum intermetallic compounds, but also retains the advantages of high thermal conductivity and light weight of aluminum-based alloys. Using this material as a brake disc material for high-speed rail transit can greatly reduce production costs on the one hand, and significantly increase the service temperature and service life of the brake disc on the other hand.

Description

technical field [0001] The invention relates to a multilayer surface composite strengthened aluminum base material, in particular to an iron-aluminum alloy composite strengthened aluminum base material, a preparation method and application thereof. Background technique [0002] With the increasingly serious problem of traffic congestion, urban rail transit has become an inevitable development trend to solve urban traffic problems due to its characteristics of large capacity, fast, comfortable, energy-saving, and environmental protection. With the continuous advancement of transportation technology, the design speed of urban rail transit vehicles is also getting higher and higher, from the previous 80km / h to 120km / h, which also puts forward higher requirements for the safety braking performance of vehicles. The braking of the vehicle is essentially to use the friction pair to convert the kinetic energy of the train into heat energy to achieve the purpose of deceleration and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C38/06C22C38/12C22C38/14C22C38/02C22C33/02C21D1/26C21D1/74C21D6/00C22F1/02C22F1/04C23C24/10B22F9/04F16D65/12
CPCC22C21/00C22C38/06C22C38/002C22C38/14C22C38/02C22C38/12C23C24/103C21D1/26C21D6/008C21D1/74C22F1/02C22F1/04B22F9/04C22C33/0278F16D65/125B22F2009/043Y02T30/00
Inventor 刘春轩邱敬文蒋兆汝吴云张扬张杰曹柳絮罗伟邱振宇罗任
Owner HUNAN JINTIAN ALUMINUM HI TECH CO LTD
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