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Surface polishing liquid of added material manufactured aluminum alloys and application

A technology of surface polishing and additive manufacturing, which is applied in the direction of additive processing to achieve the effects of low cost, controlled reaction speed and wide application range

Active Publication Date: 2019-08-06
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of surface quality of the existing additively manufactured aluminum alloys, and provide a surface polishing process for additively manufactured aluminum alloys with low configuration cost, strong stability, easy control of reaction speed, simple operation and high efficiency, which not only It is suitable for additively manufactured aluminum alloy products with regular shapes, especially for complex special-shaped aluminum alloy products with dead ends such as pipes, inner holes or inner runners with different diameters that are difficult to be treated by electrolytic polishing

Method used

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  • Surface polishing liquid of added material manufactured aluminum alloys and application
  • Surface polishing liquid of added material manufactured aluminum alloys and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The surface polishing treatment is carried out on the additively manufactured aluminum alloy tubular products with a length of 80mm and inner and outer diameters of 15mm and 5mm respectively.

[0027] (1) Chemical degreasing: Use metal detergent to prepare a degreasing solution with a concentration of 10%, put the sample into the degreasing solution at a temperature of 85°C for 30 minutes to perform ultrasonic cleaning and degreasing.

[0028] (2) Pickling: use 20mL·L -1 HNO 3 The pickling solution was reacted at room temperature for 2 minutes to further clean the surface of the aluminum alloy workpiece, and then washed with deionized water and dried.

[0029] (3) Configure polishing liquid: the content of each substance in the prepared polishing liquid is: 120g L -1 Potassium hydroxide, 30g·L -1 Sodium acetate, 35g·L -1 Sodium thiosulfate, 15g·L -1 Potassium silicate, 7g·L -1 Magnetic abrasive and 5g·L -1 Sodium tripolyphosphate, 4g·L -1 Lauryl magnesium sulfat...

Embodiment 2

[0035] The surface polishing treatment is carried out on the spherical additively manufactured aluminum alloy product with a diameter of 25 mm and an inner flow channel with a diameter of 3 mm.

[0036] (1) Chemical degreasing: Use metal detergent to prepare a degreasing solution with a concentration of 10%, put the sample into the degreasing solution at a temperature of 90°C for 25 minutes to perform ultrasonic cleaning and degreasing.

[0037] (2) Pickling: use 20mL·L -1 HNO 3The pickling solution was reacted at room temperature for 3 minutes to further clean the surface of the aluminum alloy workpiece, and then washed with deionized water and dried.

[0038] (3) Configure polishing liquid: mix 135g·L -1 Potassium hydroxide, 55g·L -1 Sodium acetate, 30g·L -1 Sodium thiosulfate, 25g·L -1 Potassium silicate, 5g·L -1 Magnetic abrasive and 10g·L -1 Sodium tripolyphosphate, 7g·L -1 Lauryl magnesium sulfate and 5mL·L -1 Additives composed of glycerin are uniformly mixed i...

Embodiment 3

[0044] The surface polishing treatment is carried out on the grid-containing additively manufactured aluminum alloy products whose length, width and height are 70mm, 20mm and 15mm respectively.

[0045] (1) Chemical degreasing: Use metal detergent to prepare a degreasing liquid with a concentration of 10%, put the sample in the degreasing liquid at a temperature of 95°C for 15 minutes for ultrasonic cleaning and degreasing.

[0046] (2) Alkali washing: use 40g L -1 The alkaline washing solution of NaOH was reacted at room temperature for 6 minutes to further clean the surface of the aluminum alloy workpiece, and then washed with deionized water and dried.

[0047] (3) Configure polishing liquid: mix 105g·L -1 Potassium hydroxide, 40g·L -1 Sodium acetate, 25g·L -1 Sodium thiosulfate, 28g·L -1 Potassium silicate, 10g·L -1 Magnetic abrasive and 7.5g·L -1 Sodium tripolyphosphate, 3.5g·L -1 Lauryl magnesium sulfate and 6.5mL·L -1 Additives composed of glycerin are uniformly...

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Abstract

The invention belongs to the field of surface treatment of aluminum alloys, and discloses surface polishing liquid of added material manufactured aluminum alloys and application. The surface polishingliquid mainly consists of 100-150 g.L-1 potassium hydroxide, 20-60 g.L-1 sodium acetate, 20-40 g.L-1 sodium sulfate, 15-30 g.L-1 potassium borate, 5-10 g.L-1 magnetic abrasives, and additives consisting of 5-10 g.L-1 sodium tripolyphosphate, 3-8 g.L-1 magnesium dodecyl sulfate and 5-10 mL.L-1 glycerinum. A polishing process comprises the steps of pretreatment-preparation of the surface polishingliquid-chemical polishing-neutralization-aftertreatment. The polishing process can be used for aluminum alloy workpieces with regular shapes, and complicated aluminum alloy products manufactured by added materials and containing pipes, apertures, curved surfaces and inner currents. After the aluminum alloy products are treated by the surface polishing liquid, the surface roughness is reduced by 50-60%, and the weight loss ratio is about 7-8%. The surface polishing liquid is stable in property, easy to obtain formula materials, low in cost, excellent in electric conductivity and not limited bythe shapes of polished products. The polishing process is safe and environment-friendly; the treated aluminum alloys are better in surface brightness and flatness; and the quality is improved.

Description

technical field [0001] The invention belongs to the technical category of surface treatment in the field of metal treatment, and in particular relates to a process for surface polishing of an additively manufactured aluminum alloy that is difficult to perform surface treatment through traditional mechanical polishing. Background technique [0002] Additive manufacturing has the advantages of high flexibility, no molds, short cycle time, diversified manufacturing products, and unlimited design space, and is widely used in aerospace, biomedical, automotive, and mechanical electronics industries. With the development of additive manufacturing technology in the direction of high efficiency and low cost, additive manufacturing has received more and more attention. Due to its unique properties, such as low density, high corrosion resistance, good electrical conductivity, thermal conductivity and light reflectivity, easy processing and relatively low cost and other excellent condit...

Claims

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Application Information

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IPC IPC(8): C23F3/02C23G3/00B33Y40/00
CPCB33Y40/00C23F3/02C23G3/00
Inventor 李建中张翼飞车双行
Owner NORTHEASTERN UNIV