公开(公告)号：EP2281908A1

公开(公告)日：2011-02-09

申请号：EP09750590.3

申请日：2009-05-20

申请人： Sumitomo Metal Industries, Ltd.

发明人： YOKOYAMA, Tetsuo ,  ANADA, Hiroyuki

IPC分类号： C22C19/05 ,  B21C23/08 ,  C22B9/18 ,  C22B9/187 ,  C22F1/10 ,  C22F1/00

CPC分类号： B21C23/08 ,  B21J1/02 ,  C21D6/004 ,  C21D7/13 ,  C21D8/10 ,  C21D9/08 ,  C22B9/18 ,  C22B23/06 ,  C22C19/05 ,  C22C19/058 ,  C22F1/10 ,  Y10T428/12

摘要： [Problem to be Solved]
There are provided a high-strength Ni-based alloy tube for nuclear power use having uniform high temperature strength throughout the overall length of tube and a method for manufacturing the same.
[Solution]
The high-strength Ni-based alloy tube for nuclear power use consists, by mass percent, of C: 0.04% or less, Si: 0.10 to 0.50%, Mn: 0.05 to 0.50%, Ni: 55 to 70%, Cr: more than 26% and not more than 35%, Al: 0.005 to 0.5%, N: 0.02 to 0.10%, and one or more kinds of Ti: 0.01 to 0.5% and Nb: 0.02 to 1.0%, the balance being Fe and impurities. For this alloy tube, the grain size is as fine as grain size No. 6 or higher in JIS G 0551. It is preferable that the high-strength Ni-based alloy tube be manufactured by the process described below:
preparing a Ni-based alloy stock through a remelting process, hot forging, heating to 1000 to 1160°C, hot extruding at a working ratio such that an extrusion ratio is 4 or higher, and performing solution annealing and thermal treatment.

摘要翻译： [待解决的问题]提供了在管的整个长度上具有均匀的高温强度的用于核电用途的高强度Ni基合金管及其制造方法。 [解决方案]核电用高强度Ni基合金管以质量％计含有C：0.04％以下，Si：0.10〜0.50％，Mn：0.05〜0.50％，Ni：55〜70％ ，Cr：26％以上35％以下，Al：0.005〜0.5％，N：0.02〜0.10％，Ti：0.01〜0.5％，Nb：0.02〜1.0％ 是铁和杂质。 对于该合金管，在JIS G 0551中，晶粒尺寸为6号以上的晶粒度。优选的是，通过以下工序制造高强度Ni基合金管：制备Ni基 合金原料通过重熔工艺，热锻，加热至1000〜1160℃，以挤出比为4以上的加工率进行热挤压，进行固溶退火和热处理。