Steel rail weld defect inspection ability of steel rail flaw detection vehicle

In order to verify the steel rail weld defect inspection ability of rail flaw detection vehicle, artificial weld defects are designed and tests of different steel rail are carried out. Test results show that within the weld effective detection area which can be covered by the flaw detection technology of rail flaw detection vehicle, the average detection rate of artificial weld defects is 97. 2%. The defect detection rate of φ 5 mm cross hole equivalent volume defects at the rail head and waist is 100%, and φ 3 mm cross hole equivalent volume defects at the rail jaw is 91. 7%. The test results can be used as a reference for peers.