디지털 홀로그래피를 이용한 PTA공법이 적용된 굴착기 초경 코팅 스페이서의 마모 단차 측정

Abstract

The spacer is mounted on the end of the arm of the excavator and is located between the bucket and the arm, and when the bucket is operated, soil is introduced to prevent damage to the excavator arm. If there is no spacer, the soil is pushed through the gap between the arm and the bucket of the excavator, gnawing the arm, causing wear, and when the wear occurs, the arm must be replaced. Since the arm of the excavator is so heavy that it can reach several tons, it is necessary to replace all the lines and grease supply lines installed in the excavator in order to replace the arm. In order to improve the lifespan of the spacer, it is intended to improve the wear resistance and increase the lifespan by using a cemented carbide coating using the PTA method. The digital holography system is a measurement method that can measure from a few micrometers to several nanometers in order to convert the height from the phase difference of light, and can draw results in a relatively quick time compared to other equipment. As a field where digital holography is applied, there are various fields of application such as medical, measurement, design, recording, and preservation. We intend to use a digital holography system to use precision measurement. We want to measure and report the wear level difference of a specimen that has been worn by using a wear tester by building a digital holography system, which is one of the non-destructive tests. In order to measure the reliability of the digital holography system, comparative measurement was performed using another non-destructive(Alpha step and FE-ESEM) testing equipment.