1School of applied technology, University of Science and Technology Liaoning, Anshan-114000, China
2Mechanical College, University of Science and Technology Liaoning, Anshan-114000, China. E-mail: 120404001@qq.com
Online published on 27 December, 2017.
Engine crankshaft of cracks macro and micro were analyzed by morphological characteristics and quench cracks organization identified as the quenching crack, but further study showed that the root cause of this quenching cracks generated not due to the heat treatment process or other causes, but due to poor uniformity of the hot iron casting, elements gathered along the grain boundary segregation.
Crack, hardening, martensite, austenite
