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1.发明授权
公开(公告)号：EP0013507B2
公开(公告)日：1989-03-08
申请号：EP79303031.3
申请日：1979-12-21
发明人： Ito, Naoya , Saito, Kiichi , Yoshida, Takeshi , Aoki, Masahiro , Okubo, Masao , Miki, Masayoshi
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2.发明公开
公开(公告)号：EP0138012A3
公开(公告)日：1988-07-06
申请号：EP84110385
申请日：1984-08-31
发明人： Kobayashi, Mineo Naoetsu Lab. NIPPON STAINLESS , Yoshida, Takeshi Naoetsu Lab. NIPPON STAINLESS , Aoki, Masahiro Naoetsu Lab. NIPPON STAINLESS , Ohkubo, Masao , Nagayama, Masaaki
IPC分类号： C21D08/00
摘要： This invention to a process for producing a plate or forging (bar, stamp work or the like), of ferrite-austenite two-phase stainless steel, containing at most 0.03 % C, at most 2.0 % Si, at most 2.0 % Mn, 25 to 35 % Cr, 6 to 15 % Ni,'at most 0.35 % N, remainder Fe and inevitable impurities with or without the addition of 0.001 to 0.030 % B with the following nickel balance value specified at -13 to -9: Ni balance value = Ni% + 0.5 Mn% + 30 x (C+N)%
-1.1 (Cr% + 1.5 Si%) + 8.2 The process of the invention is characterized in that the average crystal grain size is controlled to at most 0.015 mm by heating an ingot of the above-mentioned ferrite-austenite two-phase stainless steel at a temperature of at most 1,200°C and keeping the forging ratio by hot working at a value of at least 5.-
3.发明授权
公开(公告)号：EP0138012B1
公开(公告)日：1993-03-31
申请号：EP84110385.6
申请日：1984-08-31
发明人： Kobayashi, Mineo Naoetsu Lab. NIPPON STAINLESS , Yoshida, Takeshi Naoetsu Lab. NIPPON STAINLESS , Aoki, Masahiro Naoetsu Lab. NIPPON STAINLESS , Ohkubo, Masao , Nagayama, Masaaki
IPC分类号： C21D8/00
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公开(公告)号：EP0361268B1
公开(公告)日：1992-06-03
申请号：EP89117250.4
申请日：1989-09-18
发明人： Ikeda, Senri , Saito, Sakae , Hanada, Shuji , Hoshi, Hironobu
CPC分类号： C22C1/0416 , B23D31/008 , B32B15/01 , B32B15/017 , C22C1/045 , H01L39/2406 , H01L39/2409 , Y10S428/93 , Y10S505/919 , Y10T29/49014
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公开(公告)号：EP0016225A1
公开(公告)日：1980-10-01
申请号：EP78900169.0
申请日：1978-10-09
发明人： MOROISHI, Taishi Central Research Laboratories , FUJIKAWA, Hisao Central Research Laboratories , MURAYAMA, Junichiro Central Research Laboratories , SHOJI, Yuji NIPPON Stainless Steel Co., Ltd.
CPC分类号： C22C38/40 , C22C38/58 , F28F19/06 , F28F21/083
摘要： Austenitic steel having an excellent resistance to high temperature oxidization. The steel contains carbon up to 0.01 percent, silicium 0.1-5 percent, manganese up to 3 percent, nickel 7-45 percent, chromium 15-30 percent and sulphur 0.003 percent or less. The low content of sulphurO.003 percent or less, preferably 0.0015 percent or less, makes the steel resistant to oxidization even if exposed to a number of heat cycles between a high temperature and room temperature.
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公开(公告)号：EP0016225B2
公开(公告)日：1987-10-07
申请号：EP78900169.0
申请日：1978-10-09
发明人： MOROISHI, Taishi Central Research Laboratories , FUJIKAWA, Hisao Central Research Laboratories , MURAYAMA, Junichiro Central Research Laboratories , SHOJI, Yuji NIPPON Stainless Steel Co., Ltd.
CPC分类号： C22C38/40 , C22C38/58 , F28F19/06 , F28F21/083
摘要： Austenitic steel having an excellent resistance to high temperature oxidization. The steel contains carbon up to 0.01 percent, silicium 0.1-5 percent, manganese up to 3 percent, nickel 7-45 percent, chromium 15-30 percent and sulphur 0.003 percent or less. The low content of sulphur 0.003 percent or less, preferably 0.0015 percent or less, makes the steel resistant to oxidization even if exposed to a number of heat cycles between a high temperature and room temperature.
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7.发明公开Manufacturing process for plate or forging of ferrite-austenite two-phase stainless steel 失效一种用于生产由具有铁素体 - 奥氏体两相结构的不锈钢板或锻件的过程。
公开(公告)号：EP0138012A2
公开(公告)日：1985-04-24
申请号：EP84110385.6
申请日：1984-08-31
发明人： Kobayashi, Mineo Naoetsu Lab. NIPPON STAINLESS , Yoshida, Takeshi Naoetsu Lab. NIPPON STAINLESS , Aoki, Masahiro Naoetsu Lab. NIPPON STAINLESS , Ohkubo, Masao , Nagayama, Masaaki
IPC分类号： C21D8/00
摘要： This invention to a process for producing a plate or forging (bar, stamp work or the like), of ferrite-austenite two-phase stainless steel, containing at most 0.03 % C, at most 2.0 % Si, at most 2.0 % Mn, 25 to 35 % Cr, 6 to 15 %
Ni,'at most 0.35 % N, remainder Fe and inevitable impurities with or without the addition of 0.001 to 0.030 % B with the following nickel balance value specified at -13 to -9: Ni balance value = Ni% + 0.5 Mn% + 30 x (C+N)%
-1.1 (Cr% + 1.5 Si%) + 8.2
The process of the invention is characterized in that the average crystal grain size is controlled to at most 0.015 mm by heating an ingot of the above-mentioned ferrite-austenite two-phase stainless steel at a temperature of at most 1,200°C and keeping the forging ratio by hot working at a value of at least 5.-
8.发明授权Method of reducing or avoiding surface defects in a specific steel resistant to concentrated nitric acid 失效减少或避免表面缺陷在特定耐钢中的浓缩硝酸的方法
公开(公告)号：EP0037959B1
公开(公告)日：1984-10-24
申请号：EP81102442.1
申请日：1981-03-31
发明人： Ito, Naoya , Yoshida, Takeshi , Aoki, Masahiro , Okubo, Masao , Miki, Masayoshi
CPC分类号： C22C38/50 , C21C7/0006 , C22C38/48 , C22C38/58
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9.发明授权
公开(公告)号：EP0013507B1
公开(公告)日：1983-04-13
申请号：EP79303031.3
申请日：1979-12-21
发明人： Ito, Naoya , Saito, Kiichi , Yoshida, Takeshi , Aoki, Masahiro , Okubo, Masao , Miki, Masayoshi
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10.发明公开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。
公开(公告)号：EP0037959A1
公开(公告)日：1981-10-21
申请号：EP81102442.1
申请日：1981-03-31
发明人： Ito, Naoya , Yoshida, Takeshi , Aoki, Masahiro , Okubo, Masao , Miki, Masayoshi
CPC分类号： C22C38/50 , C21C7/0006 , C22C38/48 , 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.
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