Experimental determination of normalizing effect on mechanical and metallurgical properties of HSLA API X65 multi-pass girth weld

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SABOKROUH M.; Saroghi M.

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Paper Information

Journal: JOURNAL OF WELDING SCIENCE AND TECHNOLOGY OF IRAN Year:2019 | Volume:4 | Issue:2 Page(s): 87-98

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Title

Experimental determination of normalizing effect on mechanical and metallurgical properties of HSLA API X65 multi-pass girth weld

Author(s)

SABOKROUH M. | Saroghi M. | Issue Writer Certificate

Keywords

Normalizing

High strength low alloy steel

Multi pass girth weld

Natural gas pipeline

API X65

Abstract

High strength low alloy steels are widely used in gas industry, so shield metal arc welding in pipelines to transport natural gas from Iran is of great importance. For experimental investigation of seam weld and integrity of girth weld, destructive and non-destructive tests are required. In this article the effects of normal heat treatment on properties of multi pass welding in different situations (6-7: 30, 7: 30-9, 9-10: 30, 10: 30-12) with 36 in outside diameter is evaluated by chemical, metallography, tensile, toughness and hardness. The result shows that Normalizing increases ferrite ratio in root pass and weld cap pass respectively 24 and 6 percent than base steel. Also the increase rate of ferrite in root, hot, filler, and the cap pass are respectively 32, 14, 12 and 7 percent before than Normalizing. The elongation weld of was increased ratio than before the heat treatment in base metal respectively 65 and 5 percent. The impact energy alignment to weld (9-10: 30) had a rate of 70 percent increase before the heat treatment. The increase rate of C, V and Ti in the weld zone according to base metal in situation of 6-7: 30 are respectively 0. 01, 0. 003 and 0. 005.

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APA: Copy

SABOKROUH, M., & Saroghi, M.. (2019). Experimental determination of normalizing effect on mechanical and metallurgical properties of HSLA API X65 multi-pass girth weld. JOURNAL OF WELDING SCIENCE AND TECHNOLOGY OF IRAN, 4(2 ), 87-98. SID. https://sid.ir/paper/269203/en

Vancouver: Copy

SABOKROUH M., Saroghi M.. Experimental determination of normalizing effect on mechanical and metallurgical properties of HSLA API X65 multi-pass girth weld. JOURNAL OF WELDING SCIENCE AND TECHNOLOGY OF IRAN[Internet]. 2019;4(2 ):87-98. Available from: https://sid.ir/paper/269203/en

IEEE: Copy

M. SABOKROUH, and M. Saroghi, “Experimental determination of normalizing effect on mechanical and metallurgical properties of HSLA API X65 multi-pass girth weld,” JOURNAL OF WELDING SCIENCE AND TECHNOLOGY OF IRAN, vol. 4, no. 2 , pp. 87–98, 2019, [Online]. Available: https://sid.ir/paper/269203/en

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