发明公开
EP0037959A1 Method of reducing or avoiding surface defects in a specific steel resistant to concentrated nitric acid
失效
一种用于在材料耐浓硝酸钢减少或防止表面缺陷的方法。
- 专利标题： Method of reducing or avoiding surface defects in a specific steel resistant to concentrated nitric acid
- 专利标题（中）： 一种用于在材料耐浓硝酸钢减少或防止表面缺陷的方法。
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申请号： EP81102442.1申请日： 1981-03-31
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公开(公告)号： EP0037959A1公开(公告)日： 1981-10-21
- 发明人: Ito, Naoya , Yoshida, Takeshi , Aoki, Masahiro , Okubo, Masao , Miki, Masayoshi
- 申请人： SUMITOMO CHEMICAL COMPANY, LIMITED , NIPPON STAINLESS STEEL CO., LTD.
- 申请人地址： Kitahama 4-chome 5-33 Chuo-ku Osaka 541 JP
- 专利权人： SUMITOMO CHEMICAL COMPANY, LIMITED,NIPPON STAINLESS STEEL CO., LTD.
- 当前专利权人： SUMITOMO CHEMICAL COMPANY, LIMITED,NIPPON STAINLESS STEEL CO., LTD.
- 当前专利权人地址： Kitahama 4-chome 5-33 Chuo-ku Osaka 541 JP
- 代理机构： VOSSIUS & PARTNER
- 优先权： JP43792/80 19800402
- 主分类号： C22C38/48
- IPC分类号： C22C38/48 ; C22C38/50 ; C22C38/58
摘要：
A method for improving (reducing or avoiding) surface defects in a specific steel resistant to concentrated nitric acid is described, wherein the specific steel in the molten state is either a stainless steel comprising C≦ 0.1 wt%. 2.5≦Si≦ 5 wt%. Mn≦2 wt%.
15≦Cr≦20 wt%. 10≦Ni≦22 wt%.
C x 10≦ at least one of Nb. Ta and Zr≦2.5 wt%.
the balance being iron and inevitable impurities.
or a high-silicon-nickel-chromium steel comprising
C≦0.03 wt% 5≦ Si≦7 wt%. Mn≦10 wt%.
7≦Cr≦16 wt% 10≦Ni≦19 wt%.
C 4≦ at least one of Nb. Ta and Zr≦ 2 wt%
the balance being iron and inevitable impurities. and is admixed with titanium (0.05≦Ti≦0.2wt%) when producing said steel.
15≦Cr≦20 wt%. 10≦Ni≦22 wt%.
C x 10≦ at least one of Nb. Ta and Zr≦2.5 wt%.
the balance being iron and inevitable impurities.
or a high-silicon-nickel-chromium steel comprising
C≦0.03 wt% 5≦ Si≦7 wt%. Mn≦10 wt%.
7≦Cr≦16 wt% 10≦Ni≦19 wt%.
C 4≦ at least one of Nb. Ta and Zr≦ 2 wt%
the balance being iron and inevitable impurities. and is admixed with titanium (0.05≦Ti≦0.2wt%) when producing said steel.
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