【作者】 石卫民； 魏寿庸； 王鼎春； 李渭清； 王青江； 刘建荣；

【Author】 SHI Wei-min~1,WEI Shou-yong~1,WANG Ding-chun~1,LI Wei-qing~1,WANG Qing-jiang~2,LIU Jian-rong~2 (1.Baoti Group Co.,Ltd.,Baoji 721014,China; 2.Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

【机构】 宝钛集团有限公司； 中国科学院金属研究所；

【摘要】 研究2种不同工艺制备的Ti60高温钛合金d300 mm棒材的显微组织及力学性能。结果表明:Ti60合金大棒材的显微组织靠近外表面的区域变形比较充分,显微组织均匀性较好,靠近心部区域α相的等轴化程度低,显微组织均匀性相对表面区域较差,这种差别会遗传到两相区的热处理态显微组织中;不同变形程度的大棒材显微组织尤其是α相的形貌略有差异,但除600℃轴向拉伸性能外,室温拉伸、蠕变性能差别很小,这主要是由于初生α相体积分数较低的缘故。更多还原

【Abstract】 The microstructures and mechanical properties of d300 mm large-section Ti60 high-temperature titanium bars prepared by two different forging processes were investigated.The results show that the near-surface region exhibits more sufficient deformation than the interior region.Accordingly,αmore homogeneous microstructure is found at the near-surface region.While at the interior region,more strip-shapedαphases are found.This phenomenon will be passed down to the corresponding the heat-treated microstructure.Though large difference especiallyαphase morphology is found in the two different deformed Ti60 large-section bars,the difference of tensile and creep properties between them is not so apparent,except the tensile properties at 600℃.This can be attributed to the less a phase volume fraction.更多还原