Haynes230超合金銲件高溫機械性質之研究

Abstract

本研究針對Haynes 230超合金施以惰性氣體鎢極電弧銲（GTAW）及電漿銲(PAW)，以進行常溫及高溫機械性質之研究。研究之進行是透過微硬度試驗、拉伸試驗、光學顯微鏡觀察及掃瞄式電子顯微鏡觀察，探討Haynes230超合金銲件之機械性質及分析銲件微觀組織結構。並比較各種銲接法對Haynes230超合金機械性質之影響，以供使用者參考。 研究結果顯示，Haynes230超合金銲件之常溫、高溫機械性質於強度值及硬度值方面，於300℃、400℃及500℃均不因溫度增加而呈現不穩定之現象。表示於此些溫度之下，Haynes230超合金經TIG有填料、TIG無填料及PAW無填料之機械性質均屬穩定，可以安心使用。Superalloy Haynes 230 was taken mainly in this research to go through the study for its mechanical properties at room temperature and high temperature when applied to the inert Gas Tungsten Arc Welding(GTAW) and Plasma Arc Welding(PAW). The study was carried out through the processes of Microhardness Test, Tensile Test, Observation of Optical Microscope and Scanning Electron Microscope, etc. to explore the mechanical properties of parts welded by superalloy Haynes 230 and analyze the microstructure of weldment. A comparison amongst the variety of welding methods for their impacts against the mechanical properties of superalloy Haynes 230 was made as a provision of reference to the users. As learned from the results of research, the mechanical properties at room temperature and high temperature of weldment when superalloy Haynes 230 are applied. The parts welded by superalloy Haynes 230 from the TIG welding and PAW welding will not have unstable strength and hardness at 300C, 400C and 500C when the temperature goes up. To mean, the parts welded by superalloy Haynes 230 from the TIG welding and PAW welding will have stable mechanical properties at 300C, 400C and 500C . It will to be relieved when superalloy Haynes 230 are applied.