Reference block for ultrasonic detection of in-service steel rail welded joint and sensitivity calibration method

• Main Authors: SHI QISHUAI, TANG JUN, LUO GUOWEI, ZHANG BIN, AN SHANGWEN, LI QINGYAO, YANG GUANGMING, LI JIN, DAI DAQING, ZHENG YUNXIAN, WANG XUHUA, GAO DONGHAI, LIAN JUN, HUANG FENGYING, YU JIA, WANG YAN
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2022
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses an in-service steel rail welded joint ultrasonic detection reference block and a sensitivity calibration method.The reference block is a steel rail product and comprises an end face, a tread, a lower jaw face, a rail waist face, a rail bottom upper surface, a waist bottom arc area surface and a rail bottom lower surface, and a first flat-bottomed hole and a second flat-bottomed hole are formed in the rail head end face; the first flat-bottom hole and the second flat-bottom hole both extend to a vertical line parallel to the center line of the end face in the vertical direction. 3 # flat-bottom holes are formed in the tread; a 4 # arc notch groove is formed in the lower jaw surface; a 5 # arc notch groove is formed in the rail web surface; a 6 # arc notch groove is formed in the surface of the waist bottom arc area; a 7 # arc notch groove is formed in the upper surface of the rail bottom; and an 8 # arc notch groove and a 9 # arc notch groove are formed in the lower surface of the rail