公开(公告)号：US5766376A

公开(公告)日：1998-06-16

申请号：US669321

申请日：1996-07-22

申请人： Yasushi Hasegawa ,  Hisashi Naoi ,  Takashi Sato ,  Kohji Tamura ,  Toshio Fujita

发明人： Yasushi Hasegawa ,  Hisashi Naoi ,  Takashi Sato ,  Kohji Tamura ,  Toshio Fujita

IPC分类号： C22C29/06 ,  C21D6/00 ,  C21D8/00 ,  C22C38/00 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C8/00 ,  C22C9/00

CPC分类号： C22C38/001 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

摘要： This invention provides a ferritic heat-resistant steel having excellent HAZ softening resistance characteristics and exhibiting a high creep strength up to a high temperature of not lower than 500.degree. C., and a method of producing such a steel, the steel comprising in terms of mass %, 0.01 to 0.30% of C, 0.02 to 0.80% of Si, 0.20 to 1.50% of Mn, 0.50 to 5.00% of Cr, 0.01 to 1.50% of Mo, 0.01 to 3.50% of W, 0.02 to 1.00% of V, 0.01 to 0.50% of Nb, 0.001 to 0.06% of N, one or both of 0.001 to 0.8% of Ti and 0.001 to 0.8% of Zr, wherein a value (Ti+Zr) in (Cr, Fe, Ti, Zr) of a M.sub.23 C.sub.6 type carbide in the steel is 5 to 65%, and the present invention provides a method of producing the same.

摘要翻译： PCT No.PCT / JP95 / 02247 Sec。 371日期：1996年7月22日 102（e）日期1996年7月22日PCT 1995年11月2日PCT PCT。 公开号WO96 / 14443 日期1996年5月17日本发明提供一种具有优异的HAZ耐软化性能并且在500℃以上的高温下具有高蠕变强度的铁素体耐热钢，以及这种钢的制造方法 以质量％计含有C：0.01〜0.30％，Si：0.02〜0.80％，Mn：0.20〜1.50％，Cr：0.50〜5.00％，Mo：0.01〜1.50％，W：0.01〜3.50％ 至1.00％的V，Nb：0.01〜0.50％，N：0.001〜0.06％，Ti：0.001〜0.8％，Zr：0.001〜0.8％，其中，（Cr， Fe，Ti，Zr）为5〜65％，本发明提供了其制造方法。

公开(公告)号：US4804021A

公开(公告)日：1989-02-14

申请号：US124863

申请日：1987-11-24

申请人： Yasushi Hasegawa ,  Hiroyo Haga

发明人： Yasushi Hasegawa ,  Hiroyo Haga

IPC分类号： C22C38/00 ,  C22C38/06 ,  C22C38/14 ,  C22C38/58 ,  E21B17/00 ,  F16L9/02

CPC分类号： C22C38/14 ,  C22C38/06 ,  E21B17/00 ,  Y10S148/909

摘要： A highly tough, ERW steel pipe having a distinguished sour resistance is disclosed. The steel pipe is prepared from steel for production of ERW steel pipe containing 0.01 to 0.35% by weight of C; 0.02 to 0.5% by weight of Si; 0.1 to 1.8% by weight of Mn; more than 0.005% to 0.05% by weight of Al; 0.0005 to 0.008% by weight of Ca; 0.001 to 0.015% by weight of Zr; not more than 0.015% by weight of P; and not more than 0.003% by weight of S; a ratio of Zr/Al or (Ti+Zr)/Al being less than 2 by weight; or further containing (A) at least one of 0.2 to 0.6% by weight of Cu, 0.1 to 1.0% by weight of Ni and 0.2 to 3.0% by weight of Cr, and/or (B) at least one of 0.10 to 1.0% by weight of Mo, 0.01 to 0.15% by weight of Nb, 0.005 to 0.10% by weight of Ti and 0.01 to 0.15% by weight of V; the balance being Fe and impurities as a steel material; and the steel pipe has a welding part in which the content of Al.sub.2 O.sub.3 contained in inclusions at welding heat affected zone is not more than 50% by weight.

摘要翻译： 公开了具有显着耐酸性的高韧性ERW钢管。 钢管由钢制成，用于生产含有0.01〜0.35重量％的C的ERW钢管; 0.02〜0.5重量％的Si; 0.1〜1.8重量％的Mn; 大于0.005重量％至0.05重量％的Al; 0.0005〜0.008重量％的Ca; 0.001〜0.015重量％的Zr; 不大于0.015重量％的P; 和不大于0.003重量％的S; Zr / Al或（Ti + Zr）/ Al的重量比小于2; 或进一步含有（A）0.2〜0.6重量％的Cu，0.1〜1.0重量％的Ni和0.2〜3.0重量％的Cr中的至少一种，和/或（B）0.10〜1.0中的至少一种 Mo的重量％，Nb：0.01〜0.15重量％，Ti：0.005〜0.10重量％，V：0.01-0.15重量％ 余量为Fe，杂质为钢材; 并且钢管具有焊接热影响区的夹杂物中所含的Al 2 O 3的含量不大于50重量％的焊接部。