690合金レーザクラッド溶接部におけるミクロ割れ発生予測

才田 一幸; 文田 浩輔; 野本 裕己; 荻原 寛之; 西本 和俊

doi:10.14920/jwstaikai.2011f.0.11.0

Preprints of the National Meeting of JWS

Session ID : 111

DOI https://doi.org/10.14920/jwstaikai.2011f.0.11.0

Conference information

Host: Japan Welding Society

Prediction of Microcracking in Laser Clad Welds of Alloy 690

Kazuyoshi Saida, *Kousuke Bunda, Yuki Nomoto, Hiroyuki Ogiwara, Kazutoshi Nishimoto

Author information

Keywords: Alloy 690, Laser clad welding, Microcracking, DTR, Thermal strain analysis

CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

Mirocracking in laser clad welds of alloy 690 was predicted by correlating the DTR with the thermal strain. The DTR in laser welding was estimated from the grain boundary segregation of P and S, and thermal strain was analyzed by FEM analysis. Ductility-dip cracking in laser clad welds could be successfully predicted when the filler metal composition and laser welding condition were varied.

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