The Effect of Pre-strain on the Bake Hardening Property for Ultra-low Carbon Steel
The bake-hardening experiment was carried out for the Ultra-low carbon steel under different pre-strains,and the bake-hardening property is determined.The results are as follows:when the pre-strain is in the range of 0% ~4%,the BH value increases with the increase of the pre-strain; while in the range of 4% ~ 8%,the BH value decreases with the increase of the pre-strain,and when the pre-strain is 4%,the corresponding BH value is higher than others.When the pre-strain is from 8% to 15%,The BH value gets improved with the increase of the pre-strain,and the BH minimum value is corresponding to 8% pre-strain.While the results of Transmission electron microscopy(TEM) analysis shows that the dislocation density of 4% pre-strain is higher than that of 8% obviously,which improves that the dislocation density is the main factor that affects BH value.
Ultra-low carbon steel Bake hardening Pre-strain Cottrell atmosphere
Lan Jin Weijuan Li Xin Dong Jue Hou
School of Materials and Metallurgy, University of Science and Technology Liaoning Anshan 114051 ,China
国际会议
厦门
英文
561-565
2012-01-04（万方平台首次上网日期，不代表论文的发表时间）