北京科技大学学报Issue(2)：183-188,6.DOI:10.13374/j.issn1001-053x.2014.02.007
Q345 B和AH32连铸板坯不同部位的高温延塑性
High temperature ductility of Q345 B and AH32 continuous casting slabs at different positions
曾强国 1张博 2王福明1
作者信息
- 1. 北京科技大学冶金与生态工程学院，北京100083
- 2. 安阳钢铁集团有限责任公司，安阳455004
- 折叠
摘要
Abstract
The high temperature ductility of samples, taking from a Q345B continuous casting slab in the transverse direction, drawing direction, vertical direction and at the central part, as well as an AH32 continuous casting slab at the surface and 1/4 thick-ness position, was investigated by using a Gleeble-1500 testing machine. The fractographs and microstructures of high-temperature tensile samples were observed by optical microscopy and scanning electron microscopy. Experimental results show that the high temper-ature ductility below 950℃ changes little between 4 groups of different samples from the Q345B slab, but the variation tendencies of high temperature ductility above 950℃ are greatly different. The changes of high temperature ductility of 3 groups of samples from the AH32 slab at the surface are the same, and the reduction of area has little fluctuation. Whereas the high temperature ductility of 3 groups of samples at the 1/4 thickness differs entirely from that at the surface, and the reduction of area appears fluctuant greatly. The reason is that microcracks, composition segregation, porosity and looseness occur more easily in the columnar crystal zone of sampling than in the equiaxed crystal zone of the surface.关键词
低合金高强钢/连铸板坯/高温性能/延展性Key words
high-strength low-alloy steel/continuous casting slabs/high temperature properties/ductility分类
矿业与冶金引用本文复制引用
曾强国,张博,王福明..Q345 B和AH32连铸板坯不同部位的高温延塑性[J].北京科技大学学报,2014,(2):183-188,6.
