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Surface treatment method of welding part of metallic member

A surface treatment, metal technology, applied in the direction of metal processing equipment, manufacturing tools, abrasives, etc., can solve the problems of lack of vacuum treatment performance, difficult treatment of hydrofluoric acid removal waste liquid, time-consuming and other problems

Inactive Publication Date: 2010-01-06
ULVAC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is a problem in the wet removal method that the surface is roughened and unnecessary gas is generated by grinding other than the weld burnt part, and complicated shapes cannot be removed with a file, and dust removal is required in shot blasting. device and therefore cannot simply be
In addition, the above methods all have the problem of time-consuming
[0005] On the other hand, as the surface treatment technology of stainless steel, it relates to the removal of surface scale and surface flaws of stainless steel strips. For example, in Patent Document 1, there is a grinding method that uses the above-mentioned wet grinding and mechanical grinding together. However, due to the use of Hydrofluoric acid or sulfuric acid is used for cleaning, therefore, HF, SO, and SO are generated from the surface of the welded part in a vacuum atmosphere. 2 The problem that the desired vacuum processing performance cannot be obtained when used in a vacuum device due to unnecessary gases such as
In addition, there is a problem that the removal of hydrofluoric acid after use and the treatment of waste liquid are difficult

Method used

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  • Surface treatment method of welding part of metallic member
  • Surface treatment method of welding part of metallic member
  • Surface treatment method of welding part of metallic member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The material of samples 1 and 2 was set to stainless steel.

[0041] Mix No. 6 silica sand as grinding particles in tap water, spray it on each sample at 3 MPa, and grind its surface to an average of 30 μm. Use a mixed acid of 70% phosphoric acid and 30% sulfuric acid to electrolytically polish the sample surface. The surface of the sample is dissolved by about 15 μm. Thereafter, the sample was cleaned in the order of RO water jet cleaning, RO water immersion, pure water immersion, 50° C. warm pure water immersion, 35% nitric acid immersion, and pure water immersion, followed by nitrogen spraying and drying.

Embodiment 2

[0043] The material of samples 1 and 2 was set to aluminum.

[0044] Mix #150 alumina as grinding particles and benzotriazole as a rust inhibitor in tap water, spray it on each sample at 3MPa, and grind the surface averagely 50μm, using 80% heated to 80°C The mixed acid of phosphoric acid and 20% sulfuric acid chemically grinds the surface of the sample to dissolve the surface of the sample by about 10 μm. After that, the sample was cleaned in the order of RO water jet cleaning, RO water immersion, pure water immersion, 50°C warm pure water immersion, 35% nitric acid immersion, and pure water immersion, followed by nitrogen spraying and drying.

Embodiment 3

[0046] The material of samples 1 and 2 was set to iron.

[0047] Mix #150SiC as grinding particles and sodium phosphate as a rust inhibitor in tap water, spray it on each sample at 3MPa, grind the surface to 50μm, and clean the surface of the sample with 20% phosphoric acid at room temperature. , Make the surface of the sample dissolve about 4μm. After that, the sample was cleaned in the order of RO water jet cleaning, RO water immersion, pure water immersion, 50°C warm pure water immersion, 35% nitric acid immersion, and pure water immersion, followed by nitrogen spraying and drying.

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Abstract

This invention provides a method for treating the surface of a weld in a metal member which can efficiently and safely remove a weld burning part causative of the generation of an unnecessary gas under a vacuum atmosphere. This method is characterized in that a solution containing grinding particles is sprayed onto the weld in a metal member at a pressure of 1 MPa to 15 MPa, and the weld is subjected to electrolytic polishing, electrolytic pickling, acid cleaning using phosphoric acid, or chemical polishing.

Description

Technical field [0001] The present invention relates to a surface treatment method of a welded part of a metal member, and more specifically, relates to a surface treatment method of a welded part of a metal member placed in a vacuum atmosphere. Background technique [0002] If metal members of various shapes used in a vacuum device are joined by welding, a weld burnt part (焼け part) is generated in the bead part. This welding burned part may generate unnecessary gas and dust in a vacuum atmosphere. In order not to generate the above-mentioned unnecessary gas or the like, it is sufficient to remove the solder burnt part. [0003] In contrast to this, wet removal methods such as electrolytic polishing or chemical polishing, mechanical removal methods such as file or shot blasting, or hydrofluoric acid spray or hydrofluoric acid-containing paste removal methods are currently performed. [0004] However, the problem in the wet removal method is that even the burned part of the weld is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24C3/00C25F3/16C23G1/08
CPCC23F3/06C25F3/16C23G1/08C25F1/02B24C1/00
Inventor 稻吉荣石榑文昭石泽克修野村健
Owner ULVAC INC