Titanium welding

Process Results. Successful welds could not be produced on the Ti-6A1-4V material using load control. The loads required for the CP titanium welds (in load control) were much greater than for the Ti-15-3 welds discussed earlier, despite the same approximate sample thickness. Forward loads for the CP titanium and Ti-6A1-4V were also much greater than for the Ti-15-3 welds. No measurable wear or deformation of the single tool used to run all of the welds was found after total weld lengths of over 9 m (30 ft). 

Hardness and Tensile Results. Results of the microhardness traverse across the weld region in the CP titanium weld are shown in Fig. 

Electrical connection is made to the anode with strips of titanium welded to the mesh. 

Titanium and titanium aUoy strip, sheet, and plate Seamless and welded titanium and titanium alloy pipe Seamless and welded titanium and titanium alloy tubes for condensers and heat exchangers Titanium and titanium alloy bars and biUets Seamless and welded imalloyed titanium welding fittings (1974) Titanium and titanium alloy castings Titanium and titanium alloy forgings... 

Product Forms and Condition. IMI 829 is available in the form of bar, billet, plate, sheet, wire, and castings. IMI 829 is fully weldable using any of the titanium welding techniques, MIG, TIG,... 

The radiographs were made from austenitic (titanium- or niobium-stabilised nickel chromium steels) welds that were double-wall penetrateted by x-rays of 130kV. The wall thiekness is in the range of 8 to 12 mm. 

Eabrication techniques must take into account the metallurgical properties of the metals to be joined and the possibiUty of undesirable diffusion at the interface during hot forming, heat treating, and welding. Compatible alloys, ie, those that do not form intermetaUic compounds upon alloying, eg, nickel and nickel alloys (qv), copper and copper alloys (qv), and stainless steel alloys clad to steel, may be treated by the traditional techniques developed for clads produced by other processes. On the other hand, incompatible combinations, eg, titanium, zirconium, or aluminum to steel, require special techniques designed to limit the production at the interface of undesirable intermetaUics which would jeopardize bond ductihty. 

Pig. 10. Double-v inlay, batten-strap technique for fusion welding of an explosion-clad plate containing titanium and zirconium. 

In the sheet-forming process, stainless steel, bronze, nickel-base alloys, or titanium powders are mixed with a thermosetting plastic and presintered to polymerize the plastic. Sintering takes place in wide, shallow trays. The specified porosity is achieved by selecting the proper particle size of the powder. Sheet is available in a variety of thicknesses between 16 x 30 mm and as much as 60 x 150 cm. A sheet can be sheared, roUed, and welded into different configurations. 

Types 321 and 347 have additions of titanium and niobium, respectively, and are used in welding appHcations and high temperature service under corrosive conditions. Type 304L may be used as an alternative for Types 321 and 347 in welding (qv) and stress-reHeving appHcations below 426°C. 

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