Volume 4, Issue 2 (Journal OF Welding Science and Technology of Iran 2019)                   JWSTI 2019, 4(2): 87-98 | Back to browse issues page

XML Persian Abstract Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:
Sabokrouh M, Saroghi M. Experimental determination of normalizing effect on mechanical and metallurgical properties of HSLA API X65 multi-pass girth weld. JWSTI 2019; 4 (2) :87-98
URL: http://jwsti.iut.ac.ir/article-1-228-en.html
Experimental determination of normalizing effect on mechanical and metallurgical properties of HSLA API X65 multi-pass girth weld
M. Sabokrouh * 1, M. Saroghi2
1- Faculty of Engineering, Mahallat Institute of Higher Education, Mahallat, Iran.
2- Faculty of Engineering, Islamic Azad University of Arak, Arak, Iran
Abstract:   (6933 Views)
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.
Keywords: normalizing, high strength low alloy steel, multi pass girth weld, natural gas pipeline, API X65
Full-Text [PDF 5977 kb]   (1502 Downloads)    
Type of Study: Research | Subject: Special
Add your comments about this article : Your username or Email:
CAPTCHA
Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

© 2024 CC BY-NC 4.0 | Journal of Welding Science and Technology of Iran

Designed & Developed by : Yektaweb