A Study on Mechanical Properties Changes to Improve the Confidence of Remaining
Life Evaluation for the Weldment of Power Plant Boiler Tube(SA213-T12) |
Byungjin Oh*,†, Joong Soon Jang** |
Correspondence:
Byungjin Oh, Email: obj@kps.co.kr |
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Abstract |
Boiler equipment in power plant is always being operated in harsh conditions and severely exposed to
the extreme environment of high temperature. Therefore periodically the state of devices should be checked,
diagnosed, and analyzed to ensure the reliability of the equipment. Traditionally, such a diagnosis is based
one or two physical properties of the sample taken from the equipment like hardness, microstructure, etc..
However, to enhance the confidence of the diagnosis, it is necessary to synthesize those properties together.
This paper is to propose such a synthetic procedure for SA213-T12(1Cr-0.5Mo) which was developed to be
used in 565℃ below condition. Creep test and accelerated degradation test were performed simultaneously,
and the physical properties such as microstructure, tensile strength, yield strength, hardness, and indentation
properties were measured. This paper proposes a method of determining the remaining life by quantitative
comparison. It will provide the basis of evaluating life assessment more objective and reliable. |
Key Words:
Life assessment, SA213-T12, Degradation, PHM |
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