Ti60钛合金大棒材的显微组织及力学性能  

Microstructures and mechanical properties of Ti60 Ti alloy large-section bars

作　　者：石卫民[1] 魏寿庸[1] 王鼎春[1] 李渭清[1] 王青江[2] 刘建荣[2] 

机构地区：[1]宝钛集团有限公司,宝鸡721014 [2]中国科学院金属研究所,沈阳110016

出　　处：《中国有色金属学报》2010年第B10期75-78,共4页The Chinese Journal of Nonferrous Metals

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。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, a more homogeneous microstructure is found at the near-surface region. While at the interior region, more strip-shaped a phases are found. This phenomenon will be passed down to the corresponding the heat-treated microstructm＇e. Though large difference especially a phase 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.

关 键 词：Ti60合金 高温合金 大规格棒材 显微组织 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]