Research on the Metallographic Examination of Common Metal Materials in Utility Boilers
A power station boiler is an important facility in a power plant,and its working environment is complex,which requires high performance of metal materials.Metallographic detection is a common method to evaluate the performance of metal materials,which comprehensively analyzes information such as the phase composition,grain size and hardness of materials by analyzing their microstructures.Based on this,this paper studies the metallographic examination of common metal materials in utility boilers,collects the samples of common metal materials in utility boilers,such as carbon steel,alloy steel and stainless steel,and then observes these samples by a metallographic micro-scope.Observation results show that the microstructure of different metal materials is obviously different:carbon steel is mainly composed of ferrite and pearlite,alloy steel contains a large number of martensite phases,and stainless steel has a relatively uniform austenite phase.In addition,in the process of metallographic examination,this paper tests the hardness of these samples,and finds that the hardness of different metal materials is different,which is re-lated to the characteristics of their microstructure:the hardness of carbon steel is low,and the hardness of alloy steel and stainless steel is high.
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