冷轧压下率对390 MPa级超低碳烘烤硬化钢组织性能和织构的影响

物理测试, 2008, 26(6): 5-0.

冷轧压下率对390 MPa级超低碳烘烤硬化钢组织性能和织构的影响

1.1.北京科技大学材料科学与工程学院, 北京 100083；2.首钢技术研究院, 北京 100041

1.1.Materials Science and Engineering College, University of Science and Technology Beijing.Beijing 100083, China；2.Shougang Research Institute of Technology，Beijing 100041, China

关键词： BH390 , coldrolling reduction , BH value , texture

Effect of Coldrolled Reduction on Microstructure，Properties and Texture of Extra Low Carbon Back Hardening 390 MPa Steel

WU Lei , CHEN Yinli , ZHAO Aimin , LIU Guangmin XIONG Aiming , XUE Junping , null

Keywords： BH390 , 冷轧压下率 , BH值 , 织构

研究了不同冷轧压下率对BH390的组织性能和织构影响。研究结果表明，抗拉强度和屈服强度随着压下率的增大而降低，延伸率和r值随冷轧压下率增大先降低后升高，BH值有逐渐增大的趋势，最大为36 MPa，n值变化不大。在试验参数范围内，70%冷轧压下率条件下，屈服强度和抗拉强度达到最大值，分别为395 MPa和270 MPa；在70%压下率下δ最大39％，r值最大170，但BH值太低，只有16 MPa。通过比较不同冷轧压下率的退火板的组织和性能，冷轧压下率为80%时，退火后获得的铁素体组织其晶粒尺寸大，晶粒度为75级，钢板综合性能较好。

The results shown that,under condition of higher cold rolling reduction,the yield strength and tensile strength decreased,the rvalue and elongation decreased first,and then increased,meanwhile,BHvalue is prone to increase gradually,with 36 MPa at maximum.With 70% cold rolling reduction,the maximun of yield strength and tensile strength was 270 MPa and 395 MPa respectively,and that of rvalue and elongation was 1.7 and 39% respectively,while nvalue had little change,It is concluded that larger grains and better synthetic properties were obtained under 80% coldrolling reduction.

参考文献

上一张下一张

计量

下载量()
访问量()

作者相关

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网