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1. 发明授权

US5944917A Stainless steel for ozone added water and manufacturing method thereof 失效
标题翻译：臭氧添加水不锈钢及其制造方法
公开(公告)号：US5944917A
公开(公告)日：1999-08-31
申请号：US865103
申请日：1997-05-29
申请人： Kiyoko Takeda , Shigeki Azuma , Yoshio Tarutani , Yoshitaka Nishiyama , Yasushi Matsuda
发明人： Kiyoko Takeda , Shigeki Azuma , Yoshio Tarutani , Yoshitaka Nishiyama , Yasushi Matsuda
IPC分类号： C21D1/76 , C21D6/00 , C22C38/00 , C22C38/06 , C22C38/18 , C22C38/34 , C22C38/42 , C22C38/44 , C23C8/18 , C25D11/34 , C23C8/00
CPC分类号： C23C8/18 , C21D6/004 , C22C38/004 , C22C38/06 , C22C38/18 , C22C38/34 , C22C38/42 , C22C38/44 , C25D11/34 , C21D1/76 , C21D6/002
摘要： A stainless steel having excellent corrosion resistance to ozone added water, such as ozone added ultrapure water used in semiconductor manufacturing processes and the like, as well as a manufacturing method. The stainless steel comprises a base metal and an oxide film formed on the surface of the base metal, the base metal being a stainless steel which contains 12 to 30% of Cr, 0 to 35% of Ni, and 1 to 6% of Al and Si while the contents of the other alloying elements are limited to as low a level as possible, the oxide film mainly comprising Al oxide or a Si oxide or both. The oxide film may be formed on the base metal surface through the dry oxidation process or the wet oxidation process. In the stainless steel, metallic ions are rarely dissolved from the base metal into the ozone added water. Also, since the contents of alloying elements, other than Cr, Ni, Al, Si, and like necessary elements, are limited to a low level, the stainless steel exhibits excellent corrosion resistance and reduced particle emission.
摘要翻译：具有优异的耐臭氧性的不锈钢，例如在半导体制造工艺中使用的加入臭氧的超纯水等，以及制造方法。该不锈钢包括在母材表面形成的贱金属和氧化膜，贱金属为不锈钢，含有12〜30％的Cr，0〜35％的Ni和1〜6％的Al 和Si，而其它合金元素的含量被限制在尽可能低的水平，氧化物膜主要包含Al氧化物或Si氧化物或两者。氧化膜可以通过干式氧化法或湿式氧化法在母材表面上形成。在不锈钢中，金属离子很少从母体金属中溶解到加入臭氧的水中。此外，由于除了Cr，Ni，Al，Si等必需元素以外的合金元素的含量被限制在低水平，所以不锈钢表现出优异的耐腐蚀性和减少的颗粒发射。

2. 发明授权

US5672215A Duplex stainless steel excellent in corrosion resistance 失效
标题翻译：双相不锈钢耐腐蚀性优良
公开(公告)号：US5672215A
公开(公告)日：1997-09-30
申请号：US682596
申请日：1996-07-24
申请人： Shigeki Azuma , Kazuhiro Ogawa
发明人： Shigeki Azuma , Kazuhiro Ogawa
IPC分类号： C22C38/42 , C22C38/58
CPC分类号： C22C38/42 , C22C38/58
摘要： An inexpensive, highly corrosion-resistant duplex stainless steel suitable for use in constructing piping systems, heat exchangers and the like to be installed in plants of oil refining industries, chemical industries and such. The highly corrosion-resistant duplex stainless steel has a chemical composition, in weight percent: 0.05 to 2.0% Si, 0.1 to 4.0% Mn, 1.0 to 4.0% Ni, 20.0 to 26.0% Cr, over 1.0 to 3.0% Cu, 0.002 to 0.05% Al, 0.10 to 0.40% N, 0.05 to 0.50% the sum of at least one of V, Ti and Nb, when necessary, 0.50% or less Mo, 0.50% or less W and 0.0030 or less B, 0.0030% or less Ca, and the balance of Fe and unavoidable impurities. Impurity contents are 0.05% or less C, 0.03% or less P and 0.005% or less S. The duplex stainless steel has Ni.sub.bal value expressed by the following Equation (1) in the range of -11.0 to -8.0: Ni.sub.bal =Ni.sub.eq -1.1.times.Cr.sub.eq +8.2 (1) where Ni.sub.eq =Ni(%)+0.5.times.Cu(%)+30.times.{C(%)+N(%)} (2) Cr.sub.eq =Cr(%)+1.5.times.Si(%)+Mo(%)+W(%) (3).
摘要翻译： PCT No.PCT / JP95 / 02524 Sec。 371日期：1996年7月24日 102（e）日期1996年7月24日PCT提交1995年12月14日PCT公布。 WO96 / 18751 PCT出版物日期1996年6月20日适用于建筑石油炼制工业，化工等工厂的管道系统，热交换器等的廉价，耐腐蚀性高的双相不锈钢。高耐腐蚀双相不锈钢具有重量百分比：0.05-2.0％Si，0.1-4.0％Mn，1.0-4.0％Ni，20.0-2.6.0％Cr，1.0-3.0％的Cu，0.002〜 0.05％Al，0.10〜0.40％N，0.05〜0.50％V，Ti和Nb中的至少一种之和，必要时为0.50％以下，Mo：0.50％以下，W：0.0030以下，B：0.0030％较少的Ca，余量的Fe和不可避免的杂质。杂质含量为0.05％以下C，0.03％以下P和0.005％以下S.双相不锈钢具有以下式（1）表示的Nibal值，范围为-11.0〜-8.0：Nibal = Nieq- 1.1xCreq + 8.2（1）其中Niq = Ni（％）+ 0.5xCu（％）+ 30x {C（％）+ N（％）}（2）Creq = Cr（％）+ 1.5xSi（％）+ Mo ％）+ W（％）（3）。

3. 发明授权

US06171547B2 Austenitic stainless steel having excellent sulfuric acid corrosion resistance and excellent workability 有权
标题翻译：奥氏体不锈钢具有优异的耐硫酸腐蚀性和优异的加工性能
公开(公告)号：US06171547B2
公开(公告)日：2001-01-09
申请号：US09287106
申请日：1999-04-07
申请人： Masayuki Sagara , Shigeki Azuma , Haruhiko Kajimura
发明人： Masayuki Sagara , Shigeki Azuma , Haruhiko Kajimura
IPC分类号： C22C3842
CPC分类号： C22C38/42 , C22C38/001 , C22C38/44
摘要： An austenitic stainless steel of the present invention has the following chemical composition based on percent by weight: C: 0.05% or less, Si: 1.0% or less, Mn: 2.0% or less, P: 0.04% or less, S: 0.01% or less, Ni: from 12 to 27%, Cr: from 15 to 26%, Cu: over 3.0 to 8.0%, Mo: over 2.0 to 5.0%, Nb: 1.0% or less, Ti: 0.5% or less, W: 5.0% or less, Zr: 1.0% or less, Al: 0.5% or less, N: under 0.05%, Ca: 0.01% or less, B: 0.01% or less, rare earth elements: 0.01% or less in total, and the balance Fe and unavoidable impurities. The austenitic stainless steel has excellent sulfuric acid corrosion resistance and excellent workability.
摘要翻译：本发明的奥氏体系不锈钢具有以重量％计的以下化学成分：C：0.05％以下，Si：1.0％以下，Mn：2.0％以下，P：0.04％以下，S：0.01 ％以下，Ni：12〜27％，Cr：15〜26％，Cu：3.0〜8.0％，Mo：2.0〜5.0％，Nb：1.0％以下，Ti：0.5％ W：5.0％以下，Zr：1.0％以下，Al：0.5％以下，N：0.05％以下，Ca：0.01％以下，B：0.01％以下，稀土类：0.01％以下总计，余量为Fe和不可避免的杂质。奥氏体不锈钢具有优异的耐硫酸腐蚀性和优异的可加工性。

4. 发明授权

US5409551A Method for minimizing surface roughening of tungsten-containing rolls and other metallic articles 失效
标题翻译：使含钨辊和其他金属制品的表面粗糙化最小化的方法
公开(公告)号：US5409551A
公开(公告)日：1995-04-25
申请号：US971215
申请日：1992-11-04
申请人： Shigeki Azuma , Yoshiaki Kusaba , Hideaki Miyuki , Hideo Yamamoto
发明人： Shigeki Azuma , Yoshiaki Kusaba , Hideaki Miyuki , Hideo Yamamoto
IPC分类号： C23C22/62 , B21B27/10 , B21B45/02 , C23C22/64 , C23C22/68 , C23C22/00
CPC分类号： C23C22/64 , B21B45/0203 , C23C22/68
摘要： A method for improving the resistance to surface roughening of tungsten-containing metallic articles such as cutting tools and hot mill rolls made of a cemented carbide or high-speed steel and extending the lifetime thereof. The method comprises treating a metallic article with an aqueous alkaline solution containing calcium ions and optionally tungstate ions having a pH greater than 8 so as to form a coating of calcium tungstate on the surface of the metallic article. In hot rolling with tungsten-containing rolls, the aqueous solution can be used as at least part of a cooling water to cool the rolls, thereby extending the period before roll replacement becomes necessary due to surface roughening and decreasing the frequency of roll dressing required during hot rolling.
摘要翻译：一种提高由硬质合金或高速钢制成的切削工具和热轧辊等含钨金属制品的耐表面粗糙化的方法，延长其寿命。该方法包括用含有钙离子的碱性水溶液和pH大于8的任选的钨酸根离子处理金属制品，以在金属制品的表面上形成钨酸钙的涂层。在含钨辊的热轧中，水溶液可以用作冷却水的至少一部分以冷却辊，从而延长由于表面粗糙而需要辊更换之前的时间段，并且减少在热轧。

5. 发明授权

US5284530A Duplex stainless steel having improved corrosion resistance 失效
标题翻译：具有改善耐腐蚀性的双相不锈钢
公开(公告)号：US5284530A
公开(公告)日：1994-02-08
申请号：US953095
申请日：1992-09-29
申请人： Shigeki Azuma , Takeo Kudo , Tadashi Fukuda
发明人： Shigeki Azuma , Takeo Kudo , Tadashi Fukuda
IPC分类号： C22C33/02 , C22C38/00 , C22C38/44
CPC分类号： C22C38/00
摘要： A high-Cr, high-Mo duplex stainless steel having excellent corrosion resistance as well as improved toughness and workability has a chemical composition which consists essentially, on a weight basis, of C: 0.03% or less, Si: 0.4% or less, Mn: 2.0% or less, Cr: 26.0-30.0%, Ni: 5.0-9.0%, Mo: 3.0 -4.5%, N: 0.10-0.35%, Al: 0.01-0.04%, optionally one or both of Cu and W in a total amount of 0.05-3.0% and/or one or more elements selected from Ca, B and Ce in a total amount of 0.001-0.01%, and a balance of Fe and incidental impurities, wherein the following inequality (1) is satisfied:-1.5.ltoreq.PBI.ltoreq.1.5 (1)where PBI=14.times.(Ni.sub.eq -0.61.times.CR.sub.eq +2.8)/(Cr.sub.eq -6)Ni.sub.eq (%)=Ni+0.5.times.Mn+30.times.(C+N){+Cu}Cr.sub.eq (%)=Cr+1.5.times.Si+Mo{+0.5.times.W}.The steel is prepared by packing a gas-atomized powder of the steel composition into a metal container, sealing the metal container, and compacting and sintering the steel powder by applying hot working or a combination of hot working and cold working to the container.
摘要翻译：具有优异的耐腐蚀性以及改进的韧性和可加工性的高Cr，高Mo双相不锈钢具有基本上以重量计C：0.03％以下，Si：0.4％以下的化学组成， Mn：2.0％以下，Cr：26.0〜30.0％，Ni：5.0〜9.0％，Mo：3.0〜4.5％，N：0.10〜0.35％，Al：0.01-0.04％，Cu和W 总量为0.05-3.0％和/或选自Ca，B和Ce中的一种或多种元素，总量为0.001-0.01％，余量为Fe和杂质，其中以下不等式（1）为满足：-1.5 <= PBI <= 1.5（1）其中PBI = 14 *（Nieq-0.61 * CReq + 2.8）/（Creq-6）Nieq（％）= Ni + 0.5 * Mn + 30 *（C + ）（+ Cu）Creq（％）= Cr + 1.5 * Si + Mo（+ 0.5 * W）。通过将钢组合物的气体雾化粉末填充到金属容器中，密封金属容器，并通过对容器进行热加工或热加工和冷加工的组合来对钢粉进行压实和烧结来制备钢。

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