INFLUENCE OF RARE EARTH ON GRAIN BOUNDARY CRACKING OF CAST STEEL Ni9

Acta Metall Sin

1990, Vol. 26

Issue (2): 79-82 DOI:

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INFLUENCE OF RARE EARTH ON GRAIN BOUNDARY CRACKING OF CAST STEEL Ni9

ZHANG Wei;LI Longsheng;CHENG Ji Dalian University of Technology Dalian University of Technology;Dalian;Liaoning 116023

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ZHANG Wei;LI Longsheng;CHENG Ji Dalian University of Technology Dalian University of Technology;Dalian;Liaoning 116023. INFLUENCE OF RARE EARTH ON GRAIN BOUNDARY CRACKING OF CAST STEEL Ni9. Acta Metall Sin, 1990, 26(2): 79-82.

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Abstract The grain boundary cracking of the cast steel Ni9 seems to be mainly related tothe segregation of contaminantes H, S and P along boundaries. An addition of rare earth mayeliminate the segregation of these contaminantes along grain boundaries and improve the bind-ing force among boundaries, so as to reduce remarkably the grain boundary cracking.

Key words: cast steel Ni9 grain boundary cracking rare earth

Received: 18 February 1990

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