Crankshaft build questions

[fallnhorse]

When building a crankshaft why is it recommended to silver solder and not weld it together with a mig? Is Penetration is better soldering? Or does the heat distort or stress the metal when welding.

Thanks

 

[Brian Rupnow]

Fallnhorse--I believe it is all temperature related. The heat required to silver solder a joint is much lower than the heat created by a weld puddle of molten steel. Even when set on its lowest setting, a mig still changes metal from a solid to a liquid and then it quickly changes state back to a solid, which sets up stresses in the parts and pulls them out of "true".---Brian

 

[Niels Abildgaard]

Try this page 505

http://books.google.dk/books?id=CR7...e&q=burmeister wain welded crankshaft&f=false

I do not know why method is not used today but I know where to ask