摘要
在多道次拉拔不锈钢线材过程中，用模拟表面横裂的方法，通过试验和FEM分析，研究凹彤、U形、V形裂纹缺陷的生长和消除。当线材表面存在凹形横裂缺陷时，即使经多次拉拔．也会因缺陷侧耐承受剪切变形而产生向缺陷内的塌陷，从而使缺陷变成折叠形状而残存下来；深度相同时，宽度越大的U形缺陷经反复拉拔，越容易消除；V形横裂道次压缩率为20％时，缺陷的消除或发生折叠的临界缺陷半角y=30°-40°，低于此值易发生折叠。
To study growth and remove of concave, U and V shape crack defect using the method simulating transversal crack with test and FEM analysis in the course of multi-pass drawing stainless steel wire rod. When concave shape transversal crack exists on the surface of steel wire rod, defects become overlap shape and stay because flank of defect is forced shear deformation and caves inside the defect even after multi-pass drawing; wider U shape defects on the same depth are, more easily can be removed; as pass draught of V shape crack is 20%, critical defect half angle γ, removing defect or coming into being overlap is 30°- 40° and overlap forms below this value.
出处
《金属制品》
2006年第1期29-33,共5页
Metal Products
关键词
表面裂纹
线材拉拔
FEM
疲劳特性
surface crack
wire rod drawing
FEM
fatigue characteristic
