发明公开
EP0642871A1 METHOD OF FORMING OXIDE PASSIVATION FILM AT WELD PORTION AND PROCESS APPARATUS
失效
工艺用于生产OXIDSPASSIVIERUNGSSCHICHT焊接点位，及其装置。
- 专利标题： METHOD OF FORMING OXIDE PASSIVATION FILM AT WELD PORTION AND PROCESS APPARATUS
- 专利标题（中）： 工艺用于生产OXIDSPASSIVIERUNGSSCHICHT焊接点位，及其装置。
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申请号： EP93910412.1申请日： 1993-05-28
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公开(公告)号： EP0642871A1公开(公告)日： 1995-03-15
- 发明人: OHMI, Tadahiro , NAKAMURA, Masakazu
- 申请人： OSAKA SANSO KOGYO LIMITED , OHMI, Tadahiro
- 申请人地址： 1-14, 4-chome, Miyahara Yodogawa-ku, Osaka-shi, Osaka-fu 532 JP
- 专利权人： OSAKA SANSO KOGYO LIMITED,OHMI, Tadahiro
- 当前专利权人： OSAKA SANSO KOGYO LIMITED,OHMI, Tadahiro
- 当前专利权人地址： 1-14, 4-chome, Miyahara Yodogawa-ku, Osaka-shi, Osaka-fu 532 JP
- 代理机构： Weitzel, Wolfgang, Dr.-Ing. Patentanwalt
- 优先权： JP164376/92 19920529; JP304142/92 19921113
- 国际公布： WO9324267 19931209
- 主分类号： B23K9/00
- IPC分类号： B23K9/00 ; B23K9/16 ; C23C8/14
摘要：
This invention provides a welding method capable of forming an oxide passivation film having corrosion resistance and an extremely small emission quantity of an outgas during welding at a weld portion and portions nearby, and a process apparatus requiring an ultrahigh-clean atmosphere. A back-seal gas comprising an inert gas contaning 1 ppb to 50 ppm of oxygen gas in caused to flow during a welding process and an oxide passivation film comprising chromium oxide as a principal component is formed on the surface of a weld portion. In a process apparatus using welding for installing the apparatus, a back-seal gas comprising an inert gas containing 1 ppb to 50 ppm of oxygen gas is caused to flow during a welding process and an oxide passivation film comprising chromium oxide as a principal component is formed on the surface of a weld portion.
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