|
|
|
| Local brittleness of X70 pipeline steel |
| ; |
| 中国科学院金属研究所 |
|
Cite this article:
;. Local brittleness of X70 pipeline steel. Chin J Mater Res, 2004, 18(4): 405-411.
|
|
|
Abstract The local brittle zone phenomena of pipeline X70 steel were studied by means of
simulated heat affected zone with the emphasis on the forming of granular bainitic
in the intercritical coarse grained region and its influence on the toughness.
The experimental results showed that $M$--$A$ constituents mainly distributed at prior
austenite grain boundaries ~at ~second ~peak ~temperature of 780℃, large particle
$M$--$A$ constituent and fine grain bainitic zone were formed at prior austenite grain
boundaries at 840℃, and $M$--$A$ constituent distributed uniformity at 900℃ with the
disappear of prior austenite grain boundaries which suggested that the austenite is
mainly nucleared and grows at CGHAZ grain boundaries. Re--heat brittle phenomena was
found in CGHAZ of X70 pipeline steel at an second peak temperature of
$A_{\rm c1}$--840℃ which is narrower than $A_{\rm c1}$--$A_{\rm c3}$ and is
mainly caused by $M$--$A$ constituents distributed in chain at prior austenite grain
boundaries.
|
|
Received: 01 September 2004
|
|
|
1 D.Francois, F.M.Burdekin, Welding in the World, 41, 138(1998)
2 B.C.KIM, S.LEE, N.J.KIM, D.Y.LEE, Metali Trans. A, 22A(1) , 139(1991)
3 S.E.Webster, P.H.Bateson, Mater. Sci. and Tech., 9(1) , 83(1993)
4 Sunghak Lee, Byung Chun Kim, Dongil Kwon, Metali Trans. A, 23A(10) , 2803(1992)
5 QIAN Bainian, LI Jingli, SI Zhongyao, YI Yaoyong, Chinese J. Mater. Res., 9(2) , 119(1995) (钱百年,李晶丽,斯重遥,易耀勇,材料研究学报,9(2) , 119(1995) )
6 QIAN Bainian, TIAN Dewei, LI Jingli, YU Dehua, Welding Pipe & Tube, 6(6) ,
8(1993) (钱百年,田德蔚,李晶丽,虞德华,焊管,6(6) , 8(1993) )
7 S.K.Dhua, D.Mukerjee, D.S.Sarma, Metall, and Mater. Trans. A, 34A(11) , 2493(2003)
8 WANG Yong, HAN Tao, LIU Min, Material Engineering, 10, 14(1999) (王勇,韩涛,刘敏,材料工程,10, 14(1999) )
9 FANG Hongsheng, DENG Haijin, Mechanical Engineering Meterial, 5(1) , 5(1981) (方鸿生,邓海金,机械工程材料,5(1) , 5(1981) )
10 A.Lambert, J.Drillet, A.F.Gourgues, T.Sturel, A.Pineau, Science and Technology of Welding and Joining, 5(3) , 168(2000)
11 SHANG Chengjia, WANG Xuemin, YANG Shanwu, HE Xinlai, WU Huibin, Acta Metallurgica Sinica, 39(10) , 1019(2003) (尚成嘉,王学敏,杨善武,贺信莱,武会宾,金属学报,39(10) , 1019(2003) ) |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
