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Conventional Tube Welding

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QBM is a Mechanical Engineer, Metallurgical Engineer, Materials Engineering Consultant with world-class expertise in failure analysis, metallurgical and mechanical engineering, metal and part manufacturing, service condition effects, limited information interpretation, and results presentation to non-metallurgists

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During tube welding of stainless, steel the expert has found different root causes for problems. Tube welds are made at high speeds under tightly controlled procedures. Typically, the initial claim is that "this" coil is different. Occasionally it is, however the expert has found many solutions in the fine details of the previous forming operations and the controls in the TIG system used for many tube welds. The essence is finding and controlling the inefficiencies that bleed variable amounts of energy coming from the power supply. When these amounts leak away the amount of liquid in the puddle can rapidly change and quickly result in too much or too little molten metal.  Under typical tight tube mill conditions this produces a detectable variation in the weld. The real root cause is the low thermal efficiency of the GTAW system. The same methodology helps in improving other joining techniques such as laser or high frequency.

Read other articles by this KKAI Associate:

Stress Corrosion Cracking

Welding In Producing Mill Environments

Metal Fatigue

Liquid Metal Cracking Fracture Analysis

Mechanical Engineer, Metallurgical Engineer, Materials Engineering Consultant, failure analysis, metallurgical and mechanical engineering, metal and part manufacturing, service condition effects, limited information interpretation, and results presentation to non-metallurgists
Resume of QBL metallurgical engineer, engineering, research engineer, engineering failure analysis, accident reconstruction consultant, specialist, forensic investigation, expert witness testimony, engineering consulting services
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