Improving the plasticity of thin cold-rolled steel sheet for cold stamping

被引：3
|
作者：
Doshchechkina I.V. [1 ]
D’yachenko S.S. [1 ]
Ponomarenko I.V. [1 ]
Tatarkina I.S. [1 ]
机构：
[1] Kharkov National Automobile and Highway University, Kharkov
来源：
Steel in Translation | 2016年 / 46卷 / 5期
关键词：
cold-rolled steel; epilam coating; Erichsen tests; extensibility; ion bombardment; nanocrystalline structure; stampability; stamping; submicrocrystalline structure; technological plasticity; thin sheet;
D O I：
10.3103/S0967091216050053
中图分类号：
学科分类号：
摘要：
Two methods of surface treatment are proposed to improve the technological plasticity of thin cold-rolled carbon-steel sheet: ionic bombardment by low-energy titanium atoms; and epilam coating. Both methods markedly increase the extensibility of the sheet (by a factor of 1.2–1.3), as estimated by the maximum crater depth without cracking in Erichsen tests (from the VG group to values exceeding those for the VOSV group, which corresponds to extremely complex extension, in State Standard GOST 9045–93). This is associated with change in the behavior of the sheet on deformation (with change in the properties of the material) as a result of two processes: the healing of surface defects; and the creation of hybrid nanocrystalline and submicrocrystalline structure in the surface layer. In epilam coating, only the first process occurs; in ionic bombardment, both are observed. © 2016, Allerton Press, Inc.
引用
收藏
页码：364 / 367
页数：3
相关论文
共 50 条
12345