Welding wire with higher purity than the base material should be used. The welding wire should be reinspected before use.
2 If the weldment requires high plasticity. Inspection of factory certificates and quality certificates; The surface of the welding wire should be clean, no oxidation color, no cracks, peeling, scarring and slag and other defects. A titanium plate. Titanium tube has special physical and chemical properties, so its welding process is very different from other metals. Titanium welding is a TiG welding process that effectively protects the welding area through inert argon gas. Argon checks the factory certificate on the bottle before use to verify the purity index of argon, and then checks the bottle valve for gas leakage or failure symptoms.
When welding titanium plates and rods, ensure that:
The metal in the welding zone is not polluted by the active gas N0H and the harmful impurity element CFeMn above 250℃. Purity shall not be less than 99.98% Water content less than 50Mg/m32 Argon: industrial grade pure argon. Can not form coarse crystalline structure. The welding process must be in accordance with the predetermined construction sequence, 4 can not produce large welding residual stress and residual deformation. So. Strictly according to the process quality management standards, the implementation of the whole process of quality control. The factors of man, machine, material and method are in a good controlled state, so as to ensure the welding quality of titanium tubes within a reasonable period of time.
Titanium welding equipment and materials:
It is also equipped with a complete ammeter and voltmeter.
Welding machine: DC TiG welding machine. The welding machine should ensure excellent working characteristics and adjustment characteristics, lightweight and durable.
Welding torch: QS 75°/500 water-cooled TiG welding torch. The torch should have a simple structure. The gun body is tight, the insulation is good, the air flow is stable, the clamp tungsten hold is firm, suitable for various positions of welding characteristics. Rubber hoses and other hygroscopic materials should not be used. Use should be dedicated, argon gas transmission pipe; Semi-rigid plastic pipe is used. It shall not be used in tandem with pipes transporting other gases. Argon tube should not be too long, so as to avoid excessive pressure drop caused by air instability, generally not more than 30m to ensure that the axis is consistent, welding fixture: with austenitic stainless steel or copper tube karan, locking bolts and other groups of titanium plate and accessories. It should be ensured that there is a certain clamping force on the titanium plate and accessories. The clearance is even and appropriate. Polishing machine, auxiliary equipment and tools: Argon shield. Special file, stainless steel wire brush, etc.
Titanium welding wire: Welding wire grade ERTi2 Selection of welding wire should meet the following requirements: chemical composition and mechanical properties of welding wire should be equivalent to the base metal.
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