FORMATION OF AUSTENITE SHELL AROUND SPHEROIDAL GRAPHITE AND ITS EFFECT ON DETERIORATION OF GRAPHITE

Abstract

Abstract: To study the growth of austenitic shells around the spheroidal graphite,color metallography has been employed.It is found that the shell is not a continuous layer of austenite,but a clus- ter of wedge-shaped crystals.Three types of shells have been observed.That may strongly af- fect the deterioration of the spheroidal graphite.The mechanism of the formation of the austenitic shells has also been discussed.

Key words: Spheroidal graphite, color metallography, austenite, deterioration of graphite

ZHOU Jiyang Dalian University of Technology,Liaoning,ChinaW.SCHMITZ S.ENGLER Aachen Institute of Technology,FRG Associate Professor,Divisionof Foundry,Dalian Institute of Technology,Liaoning,China. FORMATION OF AUSTENITE SHELL AROUND SPHEROIDAL GRAPHITE AND ITS EFFECT ON DETERIORATION OF GRAPHITE[J]. Acta Metallurgica Sinica (English Letters), 1989, 2(10): 261-265.

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FORMATION OF AUSTENITE SHELL AROUND SPHEROIDAL GRAPHITE AND ITS EFFECT ON DETERIORATION OF GRAPHITE

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