Monday, August 9, 2010

[MW:6379] Flame straightening of distorted weldments

Hi members,
During and after welding distortion due to myriad reasons (wrong welding sequences, incorrect travel speed etc) usually occurs in the weldments. There is a definite methodology to restore this distortion and bring it within the limits of dimensional tolerances. I have seen some experts in this field who just apply torch flame to bring it to red heat - some typical portions of the affected parts and then apply water as coolant and lo! the material straightens out. What is the science behind it? I guess all is done below 300 deg C as judged from the colour of the spots.
Can some one guide me what it is all about, what factors rule here? What are the risks involved if not done properly?
Thankfully,
Shashank Vagal



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