Low cost titanium welding method

Abstract

Method of welding titanium using gas metal arc welding procedure where the shielding for the weld included torch shielding gas only and no trailing or backup shielding. The technique used here is a departure from known titanium welding specifications wherein extensive shielding is required.

What is claimed is:  
     
         1 . A method for welding titanium and titanium alloy comprising the steps of: 
 using the gas metal arc welding process to create a molten weld pool, and    providing an inert gas shield for only the said molten weld pool.    
     
     
         2 . A method for making a weldment from two pieces of titanium and titanium alloy comprising the steps of: 
 using the gas metal arc welding process to weld the said pieces to form a weldment, and    inspecting the resulting weldment for acceptability without any regard to color.    
     
     
         3 . A method for welding titanium and titanium alloy that does not result in an increase in surface hardness indicative of weld embrittlement, comprising the steps of: 
 using the gas metal arc welding process to create a molten weld pool, and    providing an inert gas shield for said molten weld pool only.    
     
     
         4 . A method for welding titanium and titanium alloy comprising the steps of: 
 using a filler metal in the gas metal arc welding process having a lower oxygen content than said alloy,    whereby the resulting welds are both mechanically and by internal quality acceptable, and are free of embrittlement.