Abstract��The joint flange of cooling water pipe of continuous casting machine in one company was fractured. In order to identify the failure cause�� the chemical composition�� hardness�� microstructure and the appearance of fracture were tested and analyzed. The results indicated that the content of C in flange material was 0.17%�� which was far above the standard. The content of Ti was only 0.004%�� which was far below the standard. Moreover�� the content of Ni and Cr only reached the lower limit of standard request. Due to the unqualified material of flange�� the poor-Cr zone was easily formed at crystal boundary and adjacent areas during service�� reducing the corrosion resistance of material. The lack of Ni content further accelerated the intercrystalline corrosion�� which caused the failure of flange in use.
�����ã�κ�н࣬������. �ܵ���������ʧЧ����[J]. �й������ڿ���, 2016, 34(2): 33-37.
WANG Yuan-ting�� WEI Zhong-jie�� YANG Li-zhu. Fracture failure analysis on pipe flange. Chinese Journal of Iron and Steel, 2016, 34(2): 33-37.
2016, Vol. 34 
