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Metal piece and method for processing surface of metal piece

A technology for surface treatment and metal parts, applied in the field of metal parts and their surface treatment, can solve the problems of directional anisotropy, low surface gloss, high surface roughness of metal base parts, and uneven electrochemical surface of metal base parts, etc. , to achieve the effect of improving surface roughness and surface reflectivity, improving electrochemical uniformity, and reducing surface roughness

Active Publication Date: 2009-12-02
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that the electrochemical inhomogeneity of the surface of the metal substrate, the high surface roughness of the metal substrate, the anisotropy of orientation and the low surface gloss produced in the metal processing process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This embodiment is used to illustrate the metal piece surface treatment method of the present invention.

[0047] (1) Ultrasonic degreasing

[0048] 20g.L -1 Na 2 CO 3 25g.L with -1Na 3 (PO 3 ) 2 1000 mL of the mixed solution was heated to 40 °C. The size is 60×40mm 2 The 304 type stainless steel is the metal substrate, and it is cleaned by ultrasonic wave in the above solution for 5 minutes. Take it out, cool down to room temperature, and then soak the metal piece in deionized water for 1 minute.

[0049] (2) pickling

[0050] The concentration in 1000mL is 4.12g.L -1 HNO 3 solution, add NH 4 HF 2 85g, configured as pickling solution. Soak the metal substrate after ultrasonic degreasing in the above pickling solution for 40 seconds.

[0051] (3) Pulse plasma polishing

[0052] Polishing liquid, its components include: 10ml / L~50ml / L ammonium acetate as ammonium salt, 2ml / L glycerin as current dispersant, 3g / L ammonium citrate as complexing agent and 2g...

Embodiment 2

[0056] This embodiment is used to illustrate the metal piece surface treatment method of the present invention.

[0057] The difference from Example 1 is that the polishing time is 4 minutes; the pulse working voltage is set to 280V.

[0058] The polished metal substrate is washed with water and dried to obtain metal piece B.

Embodiment 3

[0060] This embodiment is used to illustrate the metal piece surface treatment method of the present invention.

[0061] The difference from Example 1 is that it does not contain glycerin as a current dispersant.

[0062] The polished metal substrate is washed with water and dried to obtain metal piece C.

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Abstract

The invention relates to a metal piece, the roughness concentration of the surface of the metal piece is 0.02 micron to 0.1 micron, and the reflectivity of the surface is 65 percent to 90 percent. A method for processing the surface of the metal piece is used for obtaining the metal piece by polishing a metal substrate, and the polishing comprises the following steps: polishing pretreatment is carried out to the metal substrate; the metal substrate after the polishing pretreatment is dipped in polishing liquid containing ammonium salt and an addition agent, the metal substrate is put on a positive pole, and a pulse electric field with high frequency and high voltage is applied for plasma body polishing; and the metal piece is obtained after the polished metal substrate is washed and parched. Compared with the traditional polishing method, the method for processing the surface of the metal piece has the advantages that the electrochemistry leveling of the surface of the metal substrate is greatly increased, and the roughness concentration is reduced.

Description

technical field [0001] The invention relates to a metal piece and a surface treatment method thereof. Background technique [0002] Nowadays, the requirements for the appearance of metal parts are getting higher and higher, especially for metal parts used in electronic products, the comprehensive requirements for parameters such as surface roughness and surface reflectivity are also getting higher and higher. [0003] The surface treatment of general metal parts includes polishing, anodizing, micro-arc oxidation, electroplating, etc. [0004] Polishing can be used as the terminal process of surface treatment of metal parts to effectively improve the surface performance of metal parts and enhance the decorative effect. It can also be used as the pre-process of various (including special functions) surface modification technologies, making the follow-up treatment very simple and convenient. [0005] Some existing polishing methods, such as laser, ultrasonic, EDM and other pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/16
Inventor 张戈陈延伟
Owner BYD CO LTD
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