摘要
为确定钛板圆孔翻边成形性能,揭示各向异性对制件形状和尺寸精度的影响,在室温和600℃用 TC1Mδ1．5 mm钛合金坯料分别进行了圆孔翻边成形试验．结果表明:与室温冷翻边相比,热翻边可有效提高成形极限、消除冷翻边制件形状翘曲以及唇口部位椭圆化现象,在唇口边沿完好与破裂状态之间存在集中颈缩形式,而冷翻边则在底孔尺寸小于极限值时会直接发生破裂;冷、热圆孔翻边变形程度越大,则形状非轴对称化程度越严重．
To determine the hole flanging formability and reveal the effect of anisotropy on shape and size precision, a series of hole flanging experiments were executed at room temperature and 600℃, respectively, with circular plates of TC1M titanium alloy sheets. Specimens with thickness of 1.5 mm were used throughout. The results show that, compared with the cold forming process, hot flanging at high temperatures can make the limitation of formability higher. Moreover, there is a necking mode between the perfect and fracture state ; however, during the cold forming process, cracks exhibit directly if the pre-determined hole exceeds the diameter limit. The distinctly wavy height and ununiformly distributed thickness along the lip of the flanged hole occurred irrespective of hot or cold flanging and the cracks were situated at the highest points perpendicular to the rolling direction along the lip edge. The conclusion can be drawn that the more the flanging deformation, the more the nonaxisymmetric changes.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2005年第6期609-612,共4页
Materials Science and Technology
关键词
钛合金板材
圆孔翻边
成形极限
非轴对称化
翘曲
titanium alloy sheet
hole flanging process
limitation of fonmbility
nonaxisynrnetric changes
distortion
作者简介
张凌云（1963-），男，教授，博士生； E-mail：zhangly79@163．com：
崔建忠（1950-），男，博士，教授，博士生导师．
