METHOD AND DEVICE FOR MEASURING DECARBURIZED LAYER DEPTH OF STEEL MATERIAL

摘要

PROBLEM TO BE SOLVED: To measure a decarburized layer depth without cutting a steel material. ;SOLUTION: An ultrasonic probe 2 generates an ultrasonic wave due to a signal that is transmitted from a transmitter 3 via an amplifier 4 and the signal of a reflected ultrasonic wave from a steel material 1 to be measured is received by a receiver 5. An envelope detector 6 detects the envelopes (each reception intensity at each time) of reception signals from the receiver 5 and sends them to an operator 7. The operator 7 has a memory that stores the envelope data of a number of known decarburized layer depths, transmitted envelope data are compared with the known envelope being stored in a memory, and a corresponding decarburized layer depth is set to the decarburized layer depth of the steel material 1 to be measured from the constant (α) of the closest envelope out of the envelope of the memory.;COPYRIGHT: (C)1998,JPO