2020-02-28
In the range from room temperature to operating temperature, phase transitions should be avoided or minimized. Because the phase transition will cause the change of volume, resulting in internal stress or deformation, affecting the product performance and life. Therefore, the matrix material is preferably stable ferrite or austenite structure. The main failure form of cast iron parts working under high temperature is corrosion under high temperature. After the oxidation of constituent phases in the tissues (such as graphite carbon), the volume of oxide is larger than the original volume, causing irreversible expansion of the casting.
This paper is organized by shandong dongao aluminum parts co. LTD