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| Technological Property of X100 Pipeline Steel Welded Joints Based on Orthogonal Design |
| ZHANG Min,YANG Liang,LI Ji-hong |
| College of Material Science and Engineering, Xi’an University of Technology, Xi’an 710048, Shaanxi, China |
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Abstract In order to optimize the technological property of welding, the orthogonal test was arranged with Al2O3, TiO2, ZrO2 and SiO2 as four factors. Using an optical microscope and the impact-tensile materials testing machine, the microstructure and mechanical property of X100 pipeline steel weld were investigated. The results show that, when the mass fraction of Al2O3 is 10%, TiO2 of 6%, ZrO2 of 7%, SiO2 of 20%, the technological value is highest. The weld microstructure is composed of acicular ferrite and granular bainite. The maximum tensile strength of deposited metals gets to 781.4MPa, which is about 93.3% of the base materials, and impact energy are greater than 90 J at -20℃.
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Received: 21 September 2012
Published: 19 August 2013
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2013, Vol. 48 
