ANALYSIS FOR CAUSE OF CRACKS IN HAZ OF X52 ERW PIPELINE

YU Teng-yi

Volume 25 Issue 1

Jan. 2004

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YU Teng-yi. ANALYSIS FOR CAUSE OF CRACKS IN HAZ OF X52 ERW PIPELINE[J]. IRON STEEL VANADIUM TITANIUM, 2004, 25(1): 34-38,43.

Citation:

YU Teng-yi. ANALYSIS FOR CAUSE OF CRACKS IN HAZ OF X52 ERW PIPELINE[J]. IRON STEEL VANADIUM TITANIUM, 2004, 25(1): 34-38,43.

YU Teng-yi. ANALYSIS FOR CAUSE OF CRACKS IN HAZ OF X52 ERW PIPELINE[J]. IRON STEEL VANADIUM TITANIUM, 2004, 25(1): 34-38,43.

Citation:

YU Teng-yi. ANALYSIS FOR CAUSE OF CRACKS IN HAZ OF X52 ERW PIPELINE[J]. IRON STEEL VANADIUM TITANIUM, 2004, 25(1): 34-38,43.

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ANALYSIS FOR CAUSE OF CRACKS IN HAZ OF X52 ERW PIPELINE

YU Teng-yi

Panzhihua Iron&Steel Research Institute, Panzhihua 617000, Sichuan, China

Received Date: 2003-11-01

Abstract

Abstract

Adopting metalloscope and SEM to inspect the fracture and inclusions in the cracks of X52 experimental-welded-pipe steel,the composition of the inclusions was analyzed.The results show that the mass dense RE-sulphide and RE-sulphide-oxide laminated zonal inclusions are the main causes of the cracks. With high temperature and welding pressure,the severance of inclusions forms crack.
- pipeline steel,
- ERW,
- crack,
- rare-earth inclusion

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