Volume 4, Issue 1 (Journal OF Welding Science and Technology of Iran 2018)
JWSTI 2018, 4(1): 29-41 |
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Talebi Hanzaei A, Marashi P, Ranjbarnodeh E, Hamdollahzadeh A. The Effect of Hydrogen Content and Welding Conditions on the Hydrogen Induced Cracking of the API X70 Steel Weld. JWSTI 2018; 4 (1) :29-41
URL: http://jwsti.iut.ac.ir/article-1-213-en.html
URL: http://jwsti.iut.ac.ir/article-1-213-en.html
1- Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran
2- Iranian Gas Engineering and Development Co.
2- Iranian Gas Engineering and Development Co.
Abstract: (7092 Views)
In this study, first,diffusible hydrogen of cellulosic electrode E8010-P1 and low hydrogen electrode E8018-G was measured by mercury displacement method according to ISO3690. Then,the effect of preheating and post-heating on the sensitivity to hydrogen inducedcold cracking in welding of 18mm API5L X70 steel with these electrodes was investigated according to ISO17642-2. The results of visual inspection, penetrant test,metallographic examination, and hardness test showed that welding with cellulosic electrode leads to cracking unless both preheating and post-heating are applied.While in the case of low hydrogen electrode, cracking occurs only if no preheating or post-heating is applied.
Keywords: Hydrogen Inducedcold Cracking, Preheating, Post-heating, Diffusible Hydrogen, API X70 Steel.
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