Abstract��The fracture of PC steel bar was studied by means of metallurgical microscope, SEM, acid pickling, micro hardness tester and so on. The results show that the steel bar internal inclusions, surface defects and improper heat treatment are the main reasons of delayed fracture of PC steel bar. Based on the reasons for delay fractures, appropriate preventive measures were put forward to solve the problem of delayed fracture of PC steel bar effectively.
�ո�����: 2011-07-12
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E-mail: heliguo2002@163.com
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�����������գ�Ѧ���壬������. PC�ְ��ӳٶ��ѵ�ԭ�����[J]. �й������ڿ���, 2011, 29(6): 46-51.
HE Li-guo,WANG Gang,XUE Jun-feng,LI Ming-xian. Delayed Fracture Analysis of Steel Bar for Prestressed Concrete. Chinese Journal of Iron and Steel, 2011, 29(6): 46-51.
2011, Vol. 29 
