Hardening low-carbon steel by torsional cold-work at high and low strain-rates

被引：0
|
作者：
Qu J. [1 ]
Zou G.-P. [1 ]
He Y.-Z. [1 ]
机构：
[1] College of Aerospace and Civil Engineering, Harbin Engineering University
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2010年 / 31卷 / 05期
关键词：
Cold-work hardening; Compress; Damage; Low-carbon steel; SHPB; Strain-rate; Tension; Torsion; Yield strength;
D O I：
10.3969/j.issn.1006-7043.2010.05.009
中图分类号：
学科分类号：
摘要：
There are many kinds of cold-work hardening techniques for steel. However, when low-carbon steel material is tensioned, because of necking phenomenon, steel can not accumulate sufficient deformation energy to be adequately hardened in this way. In order to determine the optimal hardening value of steel, steel specimens were twisted to different degrees of torsional hardening at a low strain-rate (10-2s-1). Then the specimens were tensioned and compressed at a low strain-rate (10-2s-1), and then compressed at a high strain-rate (103s-1). The results showed that the different levels of low strain-rate tension cold hardening could respectively reinforce the tension limit, yield strength after compression, and yield strength under the impact load of steel specimens. It was proposed that on the basis of taking account of the above intensifying effects, Q235 type steel be hardened by torsion with a deformation energy density less than 6400 kJ/m3.
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页码：596 / 600
页数：4
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