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Shvoong Home>Science>Study on Influence of Rare Earth Metals on Hot Cracking Susceptibility of Pure Nickel Electrode for Summary

Study on Influence of Rare Earth Metals on Hot Cracking Susceptibility of Pure Nickel Electrode for

Article Summary   by:TsingHua     Original Author: Chinese Journal of Rare Metals
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Using the HRL 1 type hot cracking tester and the critical deformation velocity method, the principle and influence of La, Ce, Pr, Y and Nd on weld line critical deformation velocity V BL and microstructure and hot cracking susceptibility of the pure nickel electrode used for cold welding of cast iron was studied. Experiments show that there are uses of desulphurization, dephosphorus and removal impurities from the grain boundaries for the optimum value content of rare earth metal lanthanum, cerium, yttrium, praseodymium in weld metal and the deviate from this value led in a deterioration in hot cracking resistance properties. Neodymium can increase weld metal hot cracking susceptibility of the pure nickel electrode used for cold welding of cast iron. It is concluded that lanthanum, cerium, yttrium and praseodymium increase weld line critical deformation velocity V BL and improve the hot cracking resistance properties of the pure nickel electrode for welding cast iron to some extent.
Published: July 10, 2003   
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