发明授权
- 专利标题： Sheath heater
- 专利标题（中）： 护套加热器
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申请号： US319917申请日： 1989-03-06
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公开(公告)号： US4950873A公开(公告)日： 1990-08-21
- 发明人: Yoshiaki Shida , Hisao Fujikawa , Nobuyuki Maruyama , Shunichiro Akiyama
- 申请人： Yoshiaki Shida , Hisao Fujikawa , Nobuyuki Maruyama , Shunichiro Akiyama
- 申请人地址： JPX Osaka JPX Tokyo
- 专利权人： Sumitomo Metal Industries, Ltd.,Nippon Stainless Steel Co., Ltd.
- 当前专利权人： Sumitomo Metal Industries, Ltd.,Nippon Stainless Steel Co., Ltd.
- 当前专利权人地址： JPX Osaka JPX Tokyo
- 优先权： JPX59-85554 19840427
- 主分类号： C22C38/44
- IPC分类号： C22C38/44 ; C22C38/46 ; H05B3/48
摘要：
A corrosion-resistant steel tube such as a sheath heater steel tube and boiler tube which exhibit improved resistance to dry corrosion under high temperature dry-corrosive conditions in the presence of chlorides is disclosed. The steel consists essentially of, in % by weight:______________________________________ C: not more than 0.05%, Si: 0.1-2.0%, Mn: not more than 2.0%, Cr: 18-26%, Ni: 16-30%, ______________________________________ at least one of Mo: 0.5-4.0%, W: 0.01-4.00%, andV: 0.01-4.00%,N: 0-0.25%,(Ti+Nb): 0-1.5%, andthe balance iron and incidental impurities.
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