HIGH-TEMPERATURE CORROSION FATIGUE TESTING METHOD AND DEVICE THEREFOR

摘要

PROBLEM TO BE SOLVED: To reproduce a corrosive environment without arresting high-temperature fatigue testing function by intermittently spraying a corrosive solution to a test piece simultaneously with the induction heating of the test piece, and performing a tensile compression fatigue test. ;SOLUTION: A corrosive solution spraying device is formed of a corrosive solution tank 5 provided with a compressor 6, and a corrosive solution supplying system 12 connected thereto and having a tip extended to the clearance of an induction coil 1. The corrosive solution supplying system 12 is provided with a solenoid valve 8 connected to a relay type control device 7. The spraying pressure of corrosive solution is obtained by increasing the air pressure within the corrosive solution tank 5 by the compressor 6, and the intermittent spraying is automatically performed by operating the solenoid valve 8 by the relay type control device 7. In spraying, a single surface spraying is performed so that the corrosive solution is not directly touched to a thermocouple 9, whereby the corrosion damage of the thermocouple 9 and the wrong operation of a temperature control device by a sudden temperature change in adhesion of the corrosive solution are prevented. According to this, a high-temperature corrosion fatigue environment can be reproduced in an exhaust system in automobile traveling state.;COPYRIGHT: (C)1999,JPO