摘要
利用光学显微镜和扫描电镜,对Q235B钢中夹杂物与基体在轧制过程中协调变形相关性进行了研究。结果表明:采用控轧控冷工艺,因钢板在未再结晶区轧制时塑性相对较差,钢中夹杂物与基体在轧制过程中易产生相对滑动并生成微裂纹,微裂纹成为后续拉伸过程中裂纹扩展的源头,进而影响钢板的塑性;采用直接轧制工艺,轧制在再结晶区完成,钢板的塑性较好,钢中夹杂物与基体在轧制过程中不易产生微裂纹,对塑性影响较小。
The paper investigates the coordinate deformation correlation between inclusion and matrix during roll-ing of Q235B steel by means of optical microscope and scanning electron microscope. The results show that by using controlled rolling and controlled cooling process, inclusion and matrix are likely to generate relative sliding movement and form microcracks during rolling due to the poor plasticity of steel plate rolled in non - recrystallization zone, the microcracks become the origin of cracking propagation in subsequent tensioning, which affects plasticity of steel plate. The plasticity of steel plate is relatively good when it is rolled by direct rolling process, and furthermore, the inclusion and matrix are unlikely to generate microcracks during rolling, which has little effect on plasticity.
出处
《宽厚板》
2017年第2期22-25,共4页
Wide and Heavy Plate
关键词
控轧控冷
直接轧制
夹杂
塑性
Controlled rolling and controlled cooling, Direct rolling, Inclusion, Plasticity
