拡散接合に関する研究(第 1 報) : グロー放電による表面処理(<特集>溶接・溶断による変形と応力に関するシンポジウム)

概要

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Surface treatment of the interface to be welded is very important factor affecting the weld characteristics of diffusion welds. The purpose of this study is to investigate the influence of the surface treatment by glow discharge in argon gas (0.01∿0.6Torr) as the surface cleaning technique on diffusion welds of copper and aluminum. The following results were obtained. 1. The surface treatment by glow discharge cleans the weld interface uniformly, and at the same time heats it. 2. The surface treatment by glow discharge gives higher weld strength than the wire-brushing surface treatment. 3. The surface of cathode is sputtered and cleaned by argon ion bombardment. 4. The cleaning action of glow discharge depends on discharge voltage and current. The increase of discharge voltage makes the weld interface cleaner than the increase of discharge current. 5. Cleanliness of the weld interface depends upon the correlation between the cleaning action by ion bombardment and the contamination due to residual, objectionable gas. The cleaner the weld interface is, the better the weld characteristcs is. 6. It is recommended for decision of discharge conditions that discharge voltage, discharge input and vacuum are as high as possible.
1976-01-05