异种不锈钢焊接之焊道γ→δ块状相变化massivephase.pdf

異種不銹鋼銲接之銲道 γ→δ塊狀相變化 Massive Phase Transformation of weld metal from Austenite to Ferrite during Dissimilar Stainless Steels Welding 謝之駿 * Chih-Chun Hsieh * 國立中興大學材料工程研究所博士班學生 e-mail:a8810031@ms55.hinet.net 摘要 Abstract 本研究在於討論異種不銹鋼銲道的 Mechanism of massive phase 塊狀相變化的之機制。塊狀肥粒鐵的型 transformation in dissimilar stainless steel welds have been investigated in this study. 態、含量、化學成分等。分別以光學顯微 The morphology, quantity and chemical 鏡 (OM) 、肥粒鐵測量計(FS) 、X 光繞射分 composition of the massive ferrite and austenite were analyzed by using optical 析儀(XRD) 、掃瞄式電子顯微鏡(SEM) 、 microscopy (OM), ferritescope (FS), X-ray 電子微探儀 (EPMA)及波長散佈分析儀 diffractometry (XRD), scanning electron microscopy (SEM), electron probe (WDS) 等儀器進行分析。經由X 光繞射分 micro-analyzer (EPMA), and wavelength 析儀顯示在異種不銹鋼銲接之銲道中，δ- dispersive spectrometer (WDS), respectively. The XRD analyses showed that 肥粒鐵比沃斯田鐵具有較高的繞射峰 the δ-ferrite indicated a higher diffraction 值，而 δ肥粒鐵的含量也維持一個較高的- peak than in austenite phase for dissimilar sta