摘要
研究了真空自耗电弧熔炼Ti1023钛合金过程中,搅拌磁场对铸锭宏观组织和铁元素含量的影响。结果表明,熔融金属在没有搅拌磁场的状态下凝固,铸锭的晶粒粗大且中间等轴晶和柱状晶的界线比较明显。施加搅拌磁场后,晶粒变细。磁场对不同熔化阶段的铸锭组织的影响程度不同,在熔炼阶段对组织影响最强,补缩阶段次之,起弧阶段最弱。未施加磁场时,熔池较窄,施加磁场后,熔池变宽,并且铁元素的偏析有一定程度的减轻。
The effect of stirring magnetic field on the maerostructure and Fe chemical composition of Ti1023 titanium alloy ingot in VAR process was researched. The results indicate that the grain size of ingot is large and the boundaries between equiaxed gains and columnar grains are obvious when the stirring magnetic is not applied in VAR. The grain size of ingot gets refined when the stirring magnetic field is applied in remelting. The influence of stirring magnetic field on ingot macrostructure is different in different phases of the remelting process, the strongest in remelting phase, moderate in hot topping phase, and the smallest in beginning phase. The molten bath before and after the application of magnetic field changes from narrow to wide, and the macrosegregatian rate of Fe is reduced as a result.
出处
《钛工业进展》
CAS
2009年第5期22-25,共4页
Titanium Industry Progress
关键词
搅拌磁场
铸锭宏观组织
Ti1023钛合金
stirring magnetic field
macrostructure of ingot
Ti1023 titanium alloy
