摘要
对连铸坯进行了一些常规的检测,包括原位分析、高倍观察、能谱扫描和枝晶腐蚀。检测结果说明Q345连铸坯的中心偏析主要是C元素的偏析。发现元素偏析点总与疏松等缺陷重合及负偏析谷常存在于正偏析峰两侧,佐证了疏松孔洞的负压抽吸作用引发中心偏析的观点。同时,检测结果还指出中心偏析由多种驱动因素,需要进一步研究枝晶生长和未凝固钢液的流动。
Some slabs were tested by using common detection methods, including in situ analysis, high magnification observation and dendrite observation. The results showed that the segregation of C element resulted in center seg- regation of Q345 steel ~slabs. It was found that the solute converging points superposed the micropores and the negative segregation valleys always adjoined the positive peaks. The phenomenon proved that the negative pressure sucking effect induces center segregation. Meanwhile, the results also showed that the slab center segregation was induced by muti-driving force.
出处
《连铸》
2013年第4期32-40,共9页
Continuous Casting
关键词
中心偏析
负压抽吸作用
C元素偏析
珠光体增多
center segregation
negative pressure sucking effect
C element segregation
increase of pearlite
