■ Material :ZG06Cr13Ni5Mo;C:0.025-0.045%,P<0.028%.
■ Metallographic structure: Martensite.
■ Weight:5-112t
■The crown and lower ring are very sensitive to temperature, and they are easy to deform at high and low temperature.
■During the heat treatment of the crown and band, it is easy to deform and the process parameters are not easy to master.