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1. 发明申请

US20060243719A1 Austenitic stainless steel welding wire and welding structure 有权
标题翻译：奥氏体不锈钢焊丝和焊接结构
公开(公告)号：US20060243719A1
公开(公告)日：2006-11-02
申请号：US11404413
申请日：2006-04-13
申请人： Hiroshige Inoue , Ryuichi Honma , Manabu Mizumoto , Yuusuke Oikawa , Ryo Matsuhashi , Shinji Tsuge , Shigeo Fukumoto
发明人： Hiroshige Inoue , Ryuichi Honma , Manabu Mizumoto , Yuusuke Oikawa , Ryo Matsuhashi , Shinji Tsuge , Shigeo Fukumoto
IPC分类号： B23K35/22
CPC分类号： B23K35/26
摘要： A welding wire for austenitic stainless steel welding contains, in percent by mass, C: 0.005 through 0.05%, Si: 0.1 through 1.0%, Mn: 1.0 through 3.5%, Cr: 25.0 through 28.0%, Ni: 16.0 through 23.9%, Mo: 1.6 through 3.0%, Cu: 0.1 through 0.5%, Al: 0.001 through 0.02%, and N: more than 0.30 through 0.50%, limiting 0 to 0.03% or less, P to 0.03% or less, and S to 0.005% or less, and having a ratio of a Cr equivalent to Ni equivalent (Cr equivalent/Ni equivalent) within a range between 0.85 and 1.2 and a PI value of 35 or more, the remainder being iron and unavoidable impurities.
摘要翻译：奥氏体不锈钢焊接用焊丝以质量％计含有C：0.005〜0.05％，Si：0.1〜1.0％，Mn：1.0〜3.5％，Cr：25.0〜28.0％，Ni：16.0〜23.9％ Mo：1.6〜3.0％，Cu：0.1〜0.5％，Al：0.001〜0.02％，N：大于0.30〜0.50％，0〜0.03％以下，P：0.03％以下，S：0.005以下％以下，Cr相当于Ni当量（Cr当量/ Ni当量）在0.85〜1.2的范围内，PI值为35以上，剩余部分为铁和不可避免的杂质。

2. 发明授权

US09365914B2 Duplex stainless steel superior in corrosion resistance of weld 有权
标题翻译：双相不锈钢焊接耐腐蚀性优异
公开(公告)号：US09365914B2
公开(公告)日：2016-06-14
申请号：US14004039
申请日：2012-03-09
申请人： Yusuke Oikawa , Shinji Tsuge , Hiroshige Inoue , Ryo Matsuhashi
发明人： Yusuke Oikawa , Shinji Tsuge , Hiroshige Inoue , Ryo Matsuhashi
IPC分类号： C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/58 , C22C38/00 , C21D6/00 , C22C38/02 , C22C38/06 , C22C38/50 , C22C38/52 , C22C38/54 , C21D8/02 , B23K35/30 , B23K35/02
CPC分类号： C22C38/005 , B23K35/0261 , B23K35/3053 , B23K35/308 , C21D6/004 , C21D8/0226 , C21D8/0263 , C21D2211/001 , C21D2211/005 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/008 , C22C38/02 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/58
摘要： A nitrogen-rich two-phase stainless steel that has corrosion resistance equal to that of standard type of two-phase stainless steel and is not susceptible to corrosion in a welding heat-affected part, wherein the austenite phase area ratio is 40-70%, the PI value expressed by formula (1) is 30-38, the NI value expressed by formula (2) is 100-140, and the γpre expressed by formula (3) is 1350-1450. (1) PI=Cr+3.3Mo+16N (2) NI=(Cr+Mo)/N.
摘要翻译：具有与标准型两相不锈钢相同的耐腐蚀性并且在焊接热影响部分不易腐蚀的富氮两相不锈钢，其中奥氏体相面积比为40-70％，式（1）表示的PI值为30-38，式（2）表示的NI值为100〜140，式（3）表示的γpre为1350〜1450。（1）PI = Cr + 3.3Mo + 16N（2）NI =（Cr + Mo）/ N。

3. 发明授权

US09862168B2 Alloying element-saving hot rolled duplex stainless steel material, clad steel plate having duplex stainless steel as cladding material therefor, and production method for same 有权
公开(公告)号：US09862168B2
公开(公告)日：2018-01-09
申请号：US13978743
申请日：2012-01-26
申请人： Shinji Tsuge , Yuusuke Oikawa , Yoichi Yamamoto , Haruhiko Kajimura , Kazuhiko Ishida
发明人： Shinji Tsuge , Yuusuke Oikawa , Yoichi Yamamoto , Haruhiko Kajimura , Kazuhiko Ishida
IPC分类号： B32B15/01 , C22C38/00 , C22C38/50 , B23K20/04 , C21D8/02 , B21B3/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/52 , C22C38/54 , C22C38/58
CPC分类号： B32B15/011 , B21B3/00 , B21B3/02 , B23K20/04 , B32B15/01 , C21D8/0226 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/58 , Y10T428/12965
摘要： This alloying element-saving hot rolled duplex stainless steel material contains, by mass %, C: 0.03% or less, Si: 0.05% to 1.0%, Mn: 0.5% to 7.0%, P: 0.05% or less, S: 0.010% or less, Ni: 0.1% to 5.0%, Cr: 18.0% to 25.0%, N: 0.05% to 0.30% and Al: 0.001% to 0.05%, with a remainder being Fe and inevitable impurities, wherein the alloying element-saving hot rolled duplex stainless steel material is produced by hot rolling, a chromium nitride precipitation temperature TN is in a range of 960° C. or lower, a yield strength is 50 MPa or more higher than that of a hot rolled steel material which is subjected to a solution heat treatment, and the alloying element-saving hot rolled duplex stainless steel material is as hot rolled state, and is not subjected to a solution heat treatment. This clad steel plate includes a duplex stainless steel as a cladding material, the duplex stainless steel has the above composition, and the chromium nitride precipitation temperature TN is in a range of 800° C. to 970° C.

4. 发明授权

US09212412B2 Lean duplex stainless steel excellent in corrosion resistance and toughness of weld heat affected zone 有权
标题翻译：精益双相不锈钢，焊接热影响区的耐腐蚀性和韧性优异
公开(公告)号：US09212412B2
公开(公告)日：2015-12-15
申请号：US12736255
申请日：2009-03-26
申请人： Yuusuke Oikawa , Hiroshi Urashima , Shinji Tsuge , Hiroshige Inoue , Ryo Matsuhashi
发明人： Yuusuke Oikawa , Hiroshi Urashima , Shinji Tsuge , Hiroshige Inoue , Ryo Matsuhashi
IPC分类号： C22C38/42 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/46 , C22C38/58
CPC分类号： C22C38/42 , C21D1/20 , C21D8/0205 , C21D2211/001 , C21D2211/005 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/18 , C22C38/38 , C22C38/40 , C22C38/46 , C22C38/58
摘要： The present invention provides a lean duplex stainless steel able to suppress the drop in corrosion resistance and toughness of a weld heat affected zone comprising, by mass %, C: 0.06% or less, Si: 0.1 to 1.5%, Mn: 2.0 to 4.0%, P: 0.05% or less, S: 0.005% or less, Cr: 19.0 to 23.0%, Ni: 1.0 to 4.0%, Mo: 1.0% or less, Cu: 0.1 to 3.0%, V: 0.05 to 0.5%, Al: 0.003 to 0.050%, O: 0.007% or less, N: 0.10 to 0.25%, and Ti: 0.05% or less, having a balance of Fe and unavoidable impurities. An Md30 value is 80 or less, an Ni-bal is −7.1 to 4, an austenite phase area percentage is 40 to 70%, and a 2×Ni+Cu is 3.5 or more: Md30=551−462×(C+N)−9.2×Si−8.1×Mn−29×(Ni+Cu)−13.7×Cr−18.5×Mo−68×Nb; Ni-bal=(Ni+0.5Mn+0.5Cu+30C+30N)−1.1(Cr+1.5Si+Mo+W)+8.2 and N(%)≦0.37+0.03×(Ni-bal).
摘要翻译：本发明提供一种能够抑制焊接热影响区域的耐腐蚀性和韧性下降的稀薄双相不锈钢，以质量％计含有C：0.06％以下，Si：0.1〜1.5％，Mn：2.0〜4.0 ％，P：0.05％以下，S：0.005％以下，Cr：19.0〜23.0％，Ni：1.0〜4.0％，Mo：1.0％以下，Cu：0.1〜3.0％，V：0.05〜0.5％，Al：0.003〜0.050％，O：0.007％以下，N：0.10〜0.25％，Ti：0.05％以下，余量由Fe和不可避免的杂质构成。 Md30值为80以下，Ni-bal为-7.1〜4，奥氏体相面积率为40〜70％，2×Ni + Cu为3.5以上：Md30 = 551-462×（C + N）-9.2×Si-8.1×Mn-29×（Ni + Cu）-13.7×Cr-18.5×Mo-68×Nb; Ni-bal =（Ni + 0.5Mn + 0.5Cu + 30C + 30N）-1.1（Cr + 1.5Si + Mo + W）+8.2和N（％）＆nlE; 0.37 + 0.03×（Ni-bal）。

5. 发明授权

US08710405B2 Austenitic stainless steel welding wire and welding structure 有权
标题翻译：奥氏体不锈钢焊丝和焊接结构
公开(公告)号：US08710405B2
公开(公告)日：2014-04-29
申请号：US11404413
申请日：2006-04-13
申请人： Hiroshige Inoue , Ryuichi Honma , Manabu Mizumoto , Yuusuke Oikawa , Ryo Matsuhashi , Shinji Tsuge , Shigeo Fukumoto
发明人： Hiroshige Inoue , Ryuichi Honma , Manabu Mizumoto , Yuusuke Oikawa , Ryo Matsuhashi , Shinji Tsuge , Shigeo Fukumoto
IPC分类号： B23K35/34 , B23K35/22
CPC分类号： B23K35/26
摘要： A welding wire for austenitic stainless steel welding contains, in percent by mass, C: 0.005 through 0.05%, Si: 0.1 through 1.0%, Mn: 1.0 through 3.5%, Cr: 25.0 through 28.0%, Ni: 16.0 through 23.9%, Mo: 1.6 through 3.0%, Cu: 0.1 through 0.5%, Al: 0.001 through 0.02%, and N: more than 0.30 through 0.50%, limiting O to 0.03% or less, P to 0.03% or less, and S to 0.005% or less, and having a ratio of a Cr equivalent to Ni equivalent (Cr equivalent/Ni equivalent) within a range between 0.85 and 1.2 and a PI value of 35 or more, the remainder being iron and unavoidable impurities.
摘要翻译：奥氏体不锈钢焊接用焊丝以质量％计含有C：0.005〜0.05％，Si：0.1〜1.0％，Mn：1.0〜3.5％，Cr：25.0〜28.0％，Ni：16.0〜23.9％ Mo：1.6〜3.0％，Cu：0.1〜0.5％，Al：0.001〜0.02％，N：大于0.30〜0.50％，将O限制在0.03％以下，P：0.03％以下，S：0.005以下％以下，Cr相当于Ni当量（Cr当量/ Ni当量）在0.85〜1.2的范围内，PI值为35以上，剩余部分为铁和不可避免的杂质。

6. 发明申请

US20130288074A1 ALLOYING ELEMENT-SAVING HOT ROLLED DUPLEX STAINLESS STEEL MATERIAL, CLAD STEEL PLATE HAVING DUPLEX STAINLESS STEEL AS CLADDING MATERIAL THEREFOR, AND PRODUCTION METHOD FOR SAME 有权
标题翻译：合金元件节热双辊不锈钢材料，具有双相不锈钢的钢板作为其粘合材料，以及其生产方法
公开(公告)号：US20130288074A1
公开(公告)日：2013-10-31
申请号：US13978743
申请日：2012-01-26
申请人： Shinji Tsuge , Yuusuke Oikawa , Yoichi Yamamoto , Haruhiko Kajimura , Kazuhiko Ishida
发明人： Shinji Tsuge , Yuusuke Oikawa , Yoichi Yamamoto , Haruhiko Kajimura , Kazuhiko Ishida
IPC分类号： B32B15/01 , C22C38/58 , C22C38/54 , C22C38/52 , C22C38/50 , C22C38/48 , C22C38/46 , C22C38/44 , C22C38/42 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , B21B3/00 , B23K20/04
CPC分类号： B32B15/011 , B21B3/00 , B21B3/02 , B23K20/04 , B32B15/01 , C21D8/0226 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/58 , Y10T428/12965
摘要： This alloying element-saving hot rolled duplex stainless steel material contains, by mass %, C: 0.03% or less, Si: 0.05% to 1.0%, Mn: 0.5% to 7.0%, P: 0.05% or less, S: 0.010% or less, Ni: 0.1% to 5.0%, Cr: 18.0% to 25.0%, N: 0.05% to 0.30% and Al: 0.001% to 0.05%, with a remainder being Fe and inevitable impurities, wherein the alloying element-saving hot rolled duplex stainless steel material is produced by hot rolling, a chromium nitride precipitation temperature TN is in a range of 960° C. or lower, a yield strength is 50 MPa or more higher than that of a hot rolled steel material which is subjected to a solution heat treatment, and the alloying element-saving hot rolled duplex stainless steel material is as hot rolled state, and is not subjected to a solution heat treatment. This clad steel plate includes a duplex stainless steel as a cladding material, the duplex stainless steel has the above composition, and the chromium nitride precipitation temperature TN is in a range of 800° C. to 970° C.
摘要翻译：该合金元素节省热轧双相不锈钢材料以质量％计含有C：0.03％以下，Si：0.05〜1.0％，Mn：0.5〜7.0％，P：0.05％以下，S：0.010 ％以下，Ni：0.1〜5.0％，Cr：18.0〜25.0％，N：0.05〜0.30％，Al：0.001〜0.05％，余量为Fe和不可避免的杂质，其中，通过热轧制造节省热轧双相不锈钢材料，氮化铬析出温度TN在960℃以下的范围内，屈服强度比热轧钢材的屈服强度高50MPa以上进行固溶热处理，合金元素节省热轧双相不锈钢材料为热轧状态，不进行固溶热处理。该复合钢板包括作为包层材料的双相不锈钢，双相不锈钢具有上述组成，氮化铬析出温度TN在800℃至970℃的范围内。

7. 发明申请

US20120111457A1 AUSTENITE-TYPE STAINLESS STEEL HOT-ROLLING STEEL MATERIAL WITH EXCELLENT CORROSION RESISTANCE, PROOF-STRESS, AND LOW-TEMPERATURE TOUGHNESS AND PRODUCTION METHOD THEREOF 有权
标题翻译：奥氏体不锈钢热轧钢材，具有优良的耐腐蚀性，耐应力和低温韧性及其生产方法
公开(公告)号：US20120111457A1
公开(公告)日：2012-05-10
申请号：US13349866
申请日：2012-01-13
申请人： Yuusuke Oikawa , Shinji Tsuge , Shigeo Fukumoto , Kazuhiro Suetsugu , Ryo Matsuhashi , Hiroshige Inoue
发明人： Yuusuke Oikawa , Shinji Tsuge , Shigeo Fukumoto , Kazuhiro Suetsugu , Ryo Matsuhashi , Hiroshige Inoue
IPC分类号： C21D11/00 , C22C38/58 , C22C38/44
CPC分类号： C22C38/001 , C22C38/002 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/44
摘要： An austenitic stainless steel hot-rolled steel material can be provided which has seawater resistance and strength superior to conventional steel. Low-temperature toughness can be maintained, which is preferable in a structural member of speedy craft. The steel material can include an austenitic stainless steel hot-rolled steel material which excels in the properties of corrosion resistance, proof stress, and low-temperature toughness. In such austenitic stainless steel hot-rolling steel material, e.g., PI [=Cr+3.3(Mo+0.5W)+16N] ranges from 35 to 40, δ cal [=2.9 (Cr+0.3Si +Mo+0.5W)−2.6 (Ni+0.3Mn+0.25Cu+35C+20N)−18] ranges from −6 to +2, and a 0.2% proof stress at room temperature is not less than 550 MPa, Charpy impact value measured using a V-notch test piece at −40° C. is not less than 100 J/cm2, and the pitting potential measured in a deaerated aqueous solution of 10% NaCl at 50° C. (Vc'100) is not less than 500 mV (as it relates to saturated Ag/AgCl).
摘要翻译：可以提供具有优于常规钢的耐海水性和强度的奥氏体不锈钢热轧钢材。可以保持低温韧性，这在快速工艺的结构构件中是优选的。钢材可以包括耐腐蚀性，耐应力性和低温韧性优异的奥氏体不锈钢热轧钢材。在这种奥氏体不锈钢热轧钢材中，例如PI [= Cr + 3.3（Mo + 0.5W）+ 16N]为35〜40，δcal[= 2.9（Cr + 0.3Si + Mo + 0.5W） -2.6（Ni + 0.3Mn + 0.25Cu + 35C + 20N）-18]的范围为-6至+2，室温下的0.2％屈服应力不低于550MPa，夏比冲击值使用V- 在-40℃下的切口试验片不小于100J / cm 2，在50℃的10％NaCl的脱气水溶液（Vc'100）中测定的点蚀电位不小于500mV 它涉及饱和Ag / AgCl）。

8. 发明申请

US20090098007A1 Duplex Stainless Steel 有权
标题翻译：双相不锈钢
公开(公告)号：US20090098007A1
公开(公告)日：2009-04-16
申请号：US11991671
申请日：2007-06-14
申请人： Shinji Tsuge , Yuusuke Oikawa , Shigeo Fukumoto
发明人： Shinji Tsuge , Yuusuke Oikawa , Shigeo Fukumoto
IPC分类号： C22C38/42 , C22C38/52 , C22C38/18 , C22C38/44
CPC分类号： C22C38/42 , C21C5/005 , C21C7/0006 , C21D7/00 , C21D8/0205 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/44 , C22C38/46 , C22C38/58
摘要： The present invention provides duplex stainless steel superior in corrosion resistance in a chloride environment and impact properties suitable as a material for pumps for seawater desalination plants, facilities and equipment, and materials for chemical tanks, that is, duplex stainless steel characterized by containing, by mass %, C: 0.06% or less, Si: 0.05 to 3.0%, Mn: 0.1 to 6.0%, P: 0.05% or less, S: 0.010% or less, Ni: 1.0 to 10.0%, Cr: 18 to 30%, Mo: 5.0% or less, Cu: 3.0% or less, N: 0.10 to 0.40%, Al: 0.001 to 0.08% or less, Ti: 0.003 to 0.05%, Mg: 0.0001 to 0.0030%, and O: 0.010% or less, having a product of an activity coefficient fN of N, Ti content, and N content fN×Ti×N of 0.00004%2 or more, and having a product of Ti content and N content Ti×N of 0.008%2 or less.
摘要翻译：本发明提供了在氯化物环境中耐腐蚀性优异的双相不锈钢和适用于海水淡化厂，设备和设备以及用于化学罐的材料的泵的冲击性能，即双相不锈钢，其特征在于，质量％，C：0.06％以下，Si：0.05〜3.0％，Mn：0.1〜6.0％，P：0.05％以下，S：0.010％以下，Ni：1.0〜10.0％，Cr：18〜30 ％，Mo：5.0％以下，Cu：3.0％以下，N：0.10〜0.40％，Al：0.001〜0.08％以下，Ti：0.003〜0.05％，Mg：0.0001〜0.0030％，O：0.010 ％以下，具有N，Ti含量，N含量fNxTixN的活性系数fN为0.00004％2以上的产物，并且具有0.008％2以下的Ti含量和N含量TixN的乘积。

9. 发明申请

US20060243356A1 Austenite-type stainless steel hot-rolling steel material with excellent corrosion resistance, proof-stress, and low-temperature toughness and production method thereof 审中-公开
标题翻译：具有优异的耐腐蚀性，耐应力和低温韧性的奥氏体型不锈钢热轧钢材及其制造方法
公开(公告)号：US20060243356A1
公开(公告)日：2006-11-02
申请号：US11343516
申请日：2006-01-30
申请人： Yuusuke Oikawa , Shinji Tsuge , Shigeo Fukumoto , Kazuhiro Suetsugu , Ryo Matsuhashi , Hiroshige Inoue
发明人： Yuusuke Oikawa , Shinji Tsuge , Shigeo Fukumoto , Kazuhiro Suetsugu , Ryo Matsuhashi , Hiroshige Inoue
IPC分类号： C22C38/44 , C21D8/00
CPC分类号： C22C38/001 , C22C38/002 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/44
摘要： An austenitic stainless steel hot-rolled steel material can be provided which has sea-water resistance and strength superior to conventional steel. Low-temperature toughness can be maintained, which is preferable in a structural member of speedy craft. The steel material can include an austenitic stainless steel hot-rolled steel material which excels in the properties of corrosion resistance, proof stress, and low-temperature toughness. In such austenitic stainless steel hot-rolling steel material, e.g., PI[=Cr+3.3(Mo+0.5W)+16N] ranges from 35 to 40, δ cal [=2.9 (Cr+0.3Si+Mo+0.5W)−2.6 (Ni+0.3Mn+0.25Cu+35C+20N)−18] ranges from −6 to +2, and a 0.2% proof stress at room temperature is not less than 550 MPa, Charpy impact value measured using a V-notch test piece at −40° C. is not less than 100 J/cm2, and the pitting potential measured in a deaerated aqueous solution of 10% NaCl at 50° C. (Vc′100) is not less than 500 mV (as it relates to saturated Ag/AgCl).
摘要翻译：可以提供具有优于常规钢的耐海水性和强度的奥氏体不锈钢热轧钢材。可以保持低温韧性，这在快速工艺的结构构件中是优选的。钢材可以包括耐腐蚀性，耐应力性和低温韧性优异的奥氏体不锈钢热轧钢材。在这种奥氏体不锈钢热轧钢材中，例如PI [= Cr + 3.3（Mo + 0.5W）+ 16N]的范围为35至40，δcal[= 2.9（Cr + 0.3Si + Mo + 0.5W） -2.6（Ni + 0.3Mn + 0.25Cu + 35C + 20N）-18]的范围为-6至+2，室温下的0.2％屈服应力不低于550MPa，夏比冲击值使用V- 在-40℃下的切口试验片不小于100J / cm 2，在50℃的10％NaCl的脱气水溶液（Vc'100）中测定的点蚀电位不小于500mV 它涉及饱和Ag / AgCl）。

10. 发明授权

US08778260B2 Duplex stainless steel 有权
标题翻译：双相不锈钢
公开(公告)号：US08778260B2
公开(公告)日：2014-07-15
申请号：US11991671
申请日：2007-06-14
申请人： Shinji Tsuge , Yuusuke Oikawa , Shigeo Fukumoto
发明人： Shinji Tsuge , Yuusuke Oikawa , Shigeo Fukumoto
IPC分类号： C22C38/42 , C22C38/52
CPC分类号： C22C38/42 , C21C5/005 , C21C7/0006 , C21D7/00 , C21D8/0205 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/44 , C22C38/46 , C22C38/58
摘要： The present invention provides duplex stainless steel superior in corrosion resistance in a chloride environment and impact properties suitable as a material for pumps for seawater desalination plants, facilities and equipment, and materials for chemical tanks, that is, duplex stainless steel characterized by containing, by mass %, C: 0.06% or less, Si: 0.05 to 3.0%, Mn: 0.1 to 6.0%, P: 0.05% or less, S: 0.010% or less, Ni: 1.0 to 10.0%, Cr: 18 to 30%, Mo: 5.0% or less, Cu: 3.0% or less, N: 0.10 to 0.40%, Al: 0.001 to 0.08% or less, Ti: 0.003 to 0.05%, Mg: 0.0001 to 0.0030%, and O: 0.010% or less, having a product of an activity coefficient fN of N, Ti content, and N content fN×Ti×N of 0.00004%2 or more, and having a product of Ti content and N content Ti×N of 0.008%2 or less.
摘要翻译：本发明提供了在氯化物环境中耐腐蚀性优异的双相不锈钢和适用于海水淡化厂，设备和设备以及用于化学罐的材料的泵的冲击性能，即双相不锈钢，其特征在于，质量％，C：0.06％以下，Si：0.05〜3.0％，Mn：0.1〜6.0％，P：0.05％以下，S：0.010％以下，Ni：1.0〜10.0％，Cr：18〜30 ％，Mo：5.0％以下，Cu：3.0％以下，N：0.10〜0.40％，Al：0.001〜0.08％以下，Ti：0.003〜0.05％，Mg：0.0001〜0.0030％，O：0.010 ％以下，具有N，Ti含量，N含量fN×Ti×N的活性系数fN为0.00004％2以上的产物，并且具有Ti含量和N含量Ti×N的乘积为0.008％2 或更少。

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