AN INVESTIGATION OF CERTAIN INTERGRANULAR CRACKS IN THE CORE OF A 20Cr2Ni4A STEEL BILLET
Tian Ji-feng Liu Xing-zhi and Wei Kun
Cite this article:
Tian Ji-feng Liu Xing-zhi and Wei Kun. AN INVESTIGATION OF CERTAIN INTERGRANULAR CRACKS IN THE CORE OF A 20Cr2Ni4A STEEL BILLET. Acta Metall Sin, 1978, 14(2): 171-252.
Abstract An investigation has been carried out on the so-called intergranular cracks appearing in the central part of a macroetched transverse section of a 20Cr2Ni4A steel billet. It is shown that this in fact was a kind of acid-etching phenomenon, due to low-melting inclusions at the interdendritic boundaries appearing as cracks. The above observation was further substantiated in laboratory ingots by the introduction of certain low-melting inclusions into experimental melts.
