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A kind of 6061 aluminum alloy surface treatment method

A technology of aluminum alloy surface and treatment method, applied in the direction of metal material coating process, coating, etc., can solve the problems of high thermal conductivity, jagged interface, poor control of cladding interface, etc., to inhibit the expansion of cracks, The effect of improving uniform elongation and improving physical and chemical properties

Active Publication Date: 2021-08-24
GUIZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, most of the current 6061 aluminum alloy surface modification coatings are aluminum-based alloys. This is because the melting point of aluminum-based alloys is low, which is close to the melting point of 6061 aluminum alloy substrates. Alloy substrate damage
However, alloy coatings with higher melting points (such as steel coatings described in this application) are difficult to apply on the surface of 6061 aluminum alloy by laser cladding, because in the actual cladding process, aluminum The reflectivity of the alloy is relatively large, the thermal conductivity is relatively high, the surface is easily oxidized, and the melting point of the aluminum alloy is relatively low, so the cladding interface is not easy to control, and the joint interface will appear jagged

Method used

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  • A kind of 6061 aluminum alloy surface treatment method
  • A kind of 6061 aluminum alloy surface treatment method
  • A kind of 6061 aluminum alloy surface treatment method

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Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1: a kind of 6061 aluminum alloy surface treatment method, the steps are as follows:

[0036] 1) Mix 50 parts of Fe powder, 29 parts of Mn powder, 8 parts of Si powder, 3 parts of Al powder and 2 parts of C powder with a purity greater than 99.7% and a particle size of 200 mesh to obtain TWIP steel powder raw material;

[0037] 2) Put the TWIP steel powder raw material into a planetary ball mill for dry grinding. The ball mill jar and balls of the planetary ball mill are made of stainless steel or corundum, the abrasive ratio is 7:1, the speed is 210 rpm, and the ball milling time is 4 After dry grinding, put the powder into a vacuum oven and dry at 120°C for 2 hours to obtain pretreated TWIP steel powder;

[0038] 3) The pretreated TWIP steel powder was pre-placed on the surface of 6061 aluminum alloy with a thickness of 0.7 mm, and then under the protection of argon, the laser power was 2.7 kW, the laser spot diameter was 4 mm, and the laser scanning speed ...

Embodiment 2

[0040] Embodiment 2: a kind of 6061 aluminum alloy surface treatment method, the steps are as follows:

[0041] 1) Mix 44 parts of Fe powder, 27 parts of Mn powder, 7 parts of Si powder, 3 parts of Al powder and 2 parts of C powder with a purity greater than 99.7% and a particle size of 140 mesh to obtain the raw material of TWIP steel powder;

[0042]2) Put the TWIP steel powder raw material into a planetary ball mill for dry grinding. The ball mill tank and balls of the planetary ball mill are made of stainless steel or corundum, the abrasive ratio is 6:1, the speed is 180 rpm, and the ball milling time is 2 After dry grinding, put the powder into a vacuum oven and dry at 110°C for 1 hour to obtain pretreated TWIP steel powder;

[0043] 3) The pretreated TWIP steel powder was pre-placed on the surface of 6061 aluminum alloy with a thickness of 0.4 mm, and then under the protection of argon, the laser power was 2.2 kW, the laser spot diameter was 3 mm, and the laser scanning ...

Embodiment 3

[0045] Embodiment 3: a kind of 6061 aluminum alloy surface treatment method, the steps are as follows:

[0046] 1) Mix 56 parts of Fe powder, 31 parts of Mn powder, 9 parts of Si powder, 4 parts of Al powder and 3 parts of C powder with a purity greater than 99.7% and a particle size of 280 mesh to obtain TWIP steel powder raw material;

[0047] 2) Put the TWIP steel powder raw material into a planetary ball mill for dry grinding. The ball mill tank and balls of the planetary ball mill are made of stainless steel or corundum, the abrasive ratio is 8:1, the speed is 240 rpm, and the milling time is 5 After dry grinding, put the powder into a vacuum oven and dry at 130°C for 3 hours to obtain pretreated TWIP steel powder;

[0048] 3) The pretreated TWIP steel powder was pre-placed on the surface of 6061 aluminum alloy with a thickness of 1.0 mm, and then under argon protection, the laser power was 3.2 kW, the laser spot diameter was 6 mm, and the laser scanning speed was 8 mm / ...

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Abstract

The invention discloses a 6061 aluminum alloy surface treatment method, which is to synthesize a TWIP steel coating in situ on the 6061 aluminum alloy surface by adopting a laser cladding method; the TWIP steel coating comprises 44-56 parts of Fe powder in parts by weight, 27‑31 parts of Mn powder, 7‑9 parts of Si powder, 3‑4 parts of Al powder and 2‑3 parts of C powder. The invention has the characteristics of good surface physical and chemical properties of the treated 6061 aluminum alloy and little damage to the base material.

Description

technical field [0001] The invention relates to an aluminum alloy surface treatment method, in particular to a 6061 aluminum alloy surface treatment method. Background technique [0002] 6061 aluminum alloy is widely used in aerospace, automotive components and other fields due to its advantages such as low density, good thermal conductivity, high specific strength, low cost, and easy processing and forming. However, in the actual application and service process, aluminum alloys also have many problems. For example, low hardness, poor wear resistance, and easy plastic deformation greatly limit the application of aluminum alloys. Therefore, there is an urgent need to develop a coating to improve the hardness and wear resistance of the 6061 aluminum alloy surface, which can be used to repair or strengthen the 6061 aluminum alloy, and can also create high economic benefits. [0003] TWIP steel is favored by people because of its TWIP effect (twin-induced plasticity). Its high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 徐鹏胡中文刘其斌郑德一
Owner GUIZHOU UNIV
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