In this paper,chemical analysis,metallographic test and scanning electron microscope were processed to analysis the failure of the water pipe joint.The results show that,The existence of coarse insoluble brittleness and intergranular distribution of residual strengthening phase between banded layers due to lack of heating in heat treatment.The alternating stress in the use of the component is perpendicular to the transverse structure.This accelerated the formation and expansion of the crack.Unreasonable str...
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