航空材料学报2013，Vol.33Issue(1)：1-6,6.DOI:10.3969/j.issn.1005-5053.2013.1.001
单面正向和正反向超塑成形对TC4钛合金负角度零件性能的影响
Influence of Single-Direct and Direct-Reverse SPF on Properties of TC4 Alloy Negative-Angle Parts
邵宗科 1黄重国 1靳舜尧 1雷鹍 2袁清华3
作者信息
- 1. 北京科技大学机械工程学院,北京100083
- 2. 航天特种材料及工艺技术研究所,北京100074
- 3. 北京科技大学材料科学与工程学院,北京100083
- 折叠
摘要
Abstract
The die design of negative-angle part was completed through MARC, and the P-t curves obtained from simulation were modified. Then SPF experiments were done. . The thickness distribution of nagative-angle wall and mechanical properties of TC4 alloy parts were studied after single-direct SPF and direct-reverse SPF, and the results were analyzed. The results show the following conclusions. There is a better thickness distribution in arc surface connection than in vertical surface connection. Negative-angle part can be formed through modified P-t curves. In nagative-angle wall the thickness is the smallest. The biggest thinning rate of the part after single-direct SPF is 67% while direct-recerse SPF is 64% , and the thickness distribution standard deviation are 0. 186mm and 0. 125mm respectively. It shows that direct-reverse SPF not only improves the minimum thickness but also makes the thickness distribution more uniform. The mechanical properties of the part decline due to grain growth which was caused by high temperature steady-state annealing and strain. The hydrogen and oxygen content in direct-reverse SPF part is more than in single-direct SPF part, and the plastic of direct-reverse part decreases more.关键词
单面正向超塑成形/正反向超塑成形/壁厚分布/力学性能/氢氧含量Key words
single-direct SPF/ direct-reverse SPF/ thickness distribution/ mechanical properties/hydrogen and oxygen content分类
矿业与冶金引用本文复制引用
邵宗科,黄重国,靳舜尧,雷鹍,袁清华..单面正向和正反向超塑成形对TC4钛合金负角度零件性能的影响[J].航空材料学报,2013,33(1):1-6,6.
