CHEN Shunqing, YU Changjiang, MAO Zhizhong, et al. Analysis and Treatment on Casting Three-way Crack of High Temperature Header in 600MW Thermal Power Unit[J]. 2021, 40(1): 53-56.
CHEN Shunqing, YU Changjiang, MAO Zhizhong, et al. Analysis and Treatment on Casting Three-way Crack of High Temperature Header in 600MW Thermal Power Unit[J]. 2021, 40(1): 53-56.DOI:
According to the problem of casting three-way weld fusion line circular crack of high temperature header in 600 MW subcritical unit
this paper analyzes the reasons from the aspects of macroscopic stress
material properties and chemical composition
it is finally confirmed that the crack belongs to reheat crack
caused by the release of complex stress at the weld fusion line.In this paper
we provide a reasonable welding and heat treatment measure to repair the above crack defects and put forward related suggestions to prevent above crack defects.