Effect of tensile strength and boron addition on microstructure and toughness of weld metal containing Ti

被引：0

作者：

Hamada M. ^{[1
]}

Okaguchi S. ^{[1
]}

Komizo Y.-I. ^{[2
]}

机构：

[1] Sumitomo Metal Industries Ltd, Tokyo

[2] Joining and Welding Research Institute, Osaka University, Osaka

来源：

Welding International | 2010年 / 24卷 / 05期

关键词：

Acicular ferrite; Bainite; High-strength; Linepipe; Weld metal; X100; X120;

D O I：

10.1080/09507110902843164

中图分类号：

学科分类号：

摘要：

The practical strength of line pipe steel has extended to X80 or greater. The line pipes of X80 grade have been commercialised successfully and now the development and evaluation of X100 and X120 grade line pipes are being conducted. The effect of boron addition on the toughness and microstructure of seam weld metal was investigated in tensile strength range from 700 to 1100 MPa. Two types of weld metal were employed in this study. Type A weld metal was produced by boron added flux. The boron content in type A weld metal was around 30 ppm. Type B weld metal was produced by boron free flux. The boron content in type B weld metal was 15ppm or less. In a tensile strength range less than 800MPa, type B weld metal had lower absorbed energy than type A because of grain boundary ferrite formation. In a tensile strength range of 800MPa or more, type B weld metal had greater absorbed energy than type A. In this tensile strength range, some of the acicular ferrite is replaced with bainite or bainite/martensite and the absorbed energy decreases with increase of tensile strength. And the type B weld metal had more amounts of acicular ferrite and greater absorbed energy than type A in this tensile strength range. © 2010 Taylor & Francis.

引用

页码：329 / 335

页数：6

共 20 条

[1]

Petersen C.W., Corbett K., Bowen R., Natural gas demand and transport outlook - 2005, Proceedings of ISOPE2005, 1, pp. 1-5, (2005)

[2]

Corbett K.T., Bowen R.R., Petersen C.W., Use of high-strength line pipe can improve economics of long distance gas lines, Oil Gas J, 101, 46, pp. 56-61, (2003)

[3]

Hashimoto T., Komizo Y., Tsukamoto M., Takeuchi I., Recent development of large diameter line pipe (X-80 and X-100 Grade), Sumitomo Search, 37, pp. 93-104, (1988)

[4]

Kawabata F., The state-of-the-art of high strength linepipe steel. Proceedings of Symposium on the State-of-the-Art and Future of Pipeline, Osaka, pp. 1-9, (1995)

[5]

Hillenbrand H.G., Liessem A., Knauf G., Niederhoff K., Bauer J., Development of large diameter pipe in X100, Proceedings of The 3rd International Conference of Pipeline Technology, (2000)

[6]

Nagase M., Endo S., Mifune N., Uchitomi N., Hirano O., Development of X100 UOE line pipe, NKK-Giho, 138, (1992)

[7]

Hammond J., Millwood N.A., Construction of ultra high strength steel pipelines, Proceedings of The 3rd International Conference of Pipeline Technology, pp. 69-88

[8]

Fairchild D.P., Macia M.L., Papka S.D., Petersen C.W., Stevens J.H., Barbas S.T., Bangaru N.V., Koo J.Y., Luton M.J., High strength steels - Beyond X80, Proceedings of Pipe Dreamer's Conference, pp. 307-321, (2002)

[9]

Asahi H., Hara T., Sugiyama M., Maruyama N., Terada Y., Tamehiro H., Koyama K., Ohkita S., Morimoto H., Tomioka K., Et al., Development of plate and seam welding technology for X120 linepipe, Proceedings of The 13th International Offshore and Polar Engineering Conference, ISOPE, 335, pp. 19-25, (2003)

[10]

Asahi H., Tsuru E., Hara T., Sugiyama M., Terada Y., Shinada H., Ohkita S., Morimoto H., Doi N., Murata M., Et al., Pipe production technology and properties of X120 linepipe, Proceedings of The 13th International Offshore and Polar Engineering Conference, pp. 43-49, (2003)

← 1 2 →