Metallographic microscope(OM)and electron probe(EPMA)were used to analyze the center segregation structure of 8011 cast-rolled strip under different casting and rolling process conditions,and the influence of different cast-ing and rolling process parameters on the center segregation defects of cast-rolled strip was studied.The results show that high cooling water temperature and large casting and rolling zone length are not conducive to the control of the center segre-gation defect of 8011 alloy cast-rolled strip.The influence of casting and rolling speed on the center segregation defect is the most sensitive.When the casting and rolling speed reaches 780 mm/min or more,the center segregation defect deteriorates sharply,which significantly affects the microstructure and properties of the strip.The center segregation defect of cast-rolled strip of 8011 alloy is a compound of β-Al5 FeSi+α-Al composed of Al,Fe and Si,which is a non-equilibrium hypereutectic structure formed during crystallization.
关键词
双辊铸轧/工艺参数/中心偏析/凝固/铸轧速度
Key words
double roll casting rolling/process parameters/central segregation/coagulate/casting and rolling speed
维普
万方数据