【摘要】 <正> 采用高温金相显微镜研究奥氏体晶粒长大,将受晶界原子蒸发滞后现象的影响,尤其在奥氏体晶粒急剧长大的温度下,不能清晰观察到晶界迁移的过程。本文通过定位高温金相照片的观察,研究奥氏体晶粒长大过程中晶界的行为,为晶界迁移机制提供实验依据。试验用西宁钢厂电弧炉生产的40CrNiMoA钢,钢的化学成分如下(wt-％):更多还原

【Abstract】 The behaviour of the grain boundary in the growth of austenite grain in alloy structural steel and the mechanism of the austenite grain growth have been observed under high temperature microscope and successively taken photomicrograph in situ It was shown that the growth of initial austenite grain and the coarsening of grown grain are substantially resulted by migration of the grain boundary which revealed mainly in moving, coalescing and disappearing of the boundary and "corner"更多还原