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The Welding Procedure of Reduction Jar’s Submerged Arc Welding

Author: LiuZuo
Tutor: WangXiJing
School: Lanzhou University of Technology
Course: Materials Science
Keywords: Reduction Pot Submerged arc welding process Welded joints Organization High temperature corrosion
CLC: TG445
Type: Master's thesis
Year: 2011
Downloads: 42
Quote: 0
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Abstract


Currently, our refining magnesium manufacturers with Pidgeon smelting metal magnesium , in Pidgeon magnesium technology process equipment , reduction tank is the most important equipment unit . In the the reduction tank of manufacturing by thick-walled tank diameter smaller limit its hemispherical head tank welding has long been performed manually , resulting in low productivity , labor-intensive , post-weld rejection rate and post-weld joint quality to reach the requirements . In this paper, automatic submerged arc welding of high production efficiency , low labor intensity and reliable weld quality , seam submerged arc welding of thick-walled small diameter stainless steel ring for innovation , of ZG30Cr24Ni7SiN restore the tank head tank connection the submerged arc welding process test , through welded joints chemical composition analysis , microscopic analysis , mechanical properties and resistance to high temperature corrosion test , and manual arc welding head comparison , analysis, develop a the best submerged arc welding process . The mechanical properties of welded joints test results show that : ( 1 ) the submerged arc welding joint mechanical properties superior to manual arc welding head ; ( 2 ) submerged arc welding using the small specification process parameters joint mechanical properties superior to submerged arc specification process parameters joints ; ③ high temperature environment buried arc welding joint mechanical properties of a sharp decline . Corrosion of welded joints resistance to high temperature corrosion test results show that : ( 1 ) submerged arc welding joints high temperature oxidation / ( vulcanized ) corrosion better than manual arc welding head ; ( 2 ) submerged arc welding using the small specification process parameters joints high temperature oxidation / ( vulcanized) superior submerged arc welding the size specification process parameters connector ; ③ welded joint fusion zone hot corrosion resistance is worse compared with the weld and the base material , and the weld and the base material to the hot corrosion resistance can be adversely affected , and increase the weld and the base material corrosion rate.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Welding, metal cutting and metal bonding > Welding process > Submerged arc welding ( flux layer welding )
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