【摘要】 稀土高温钼板坯和纯钼板坯经锻造开坯之后进行热轧与交叉换向温轧成 1 0mm的薄板 ,通过研究其高温退火后的室温力学性能 ,结果表明稀土高温钼板比纯钼板抗拉强度和延伸率高很多 ,掺杂稀土氧化物能显著地提高纯钼板的室温韧性和再结晶温度。由此探讨了弥散质点二维定向分布对稀土高温钼板微观组织形成和优异室温韧性的作用。弥散质点与位错的交互作用 ,阻碍了晶界沿径向的运动 ,稀土钼板显示出优良的综合力学性能更多还原

【Abstract】 The rare earth oxide doped molybdenum and pure molybdenum slab was rolled to 1 0 mm sheet by hot rolling and tandem warm rolling after hammer cogging, and their room temperature mechanical property after high temperature annealing was researched The results show that the tensile strengh and specific elongation of rare earth oxide doped molybdenum sheet is much higher than pure molybdenum shee, and rare earth oxide could obviously improve room temperature toughness and recrystallization temperature of pure molybdenum sheet The effect of dispersion particle two dimension distribution on forming microstructure and room temperature toughness of rare earth oxide doped molybdenum sheet was discussed The interaction between dispersion particle and dislocation blocks the radial movement of grain boundary and the rare earth oxide doped molybdenum sheet exhibits excellent comprehensive mechanical property更多还原