摘要
采用电感耦合等离子体原子发射光谱仪、差热-热重分析仪和金相显微镜等检测手段研究了Cr加入量对金属锰凝固组织的影响.结果表明,变质处理得到的金属锰凝固组织主要为柱状树枝晶,添加Cr有利于枝晶组织细化,Cr加入量由0增加至3.7%(?)时,金属锰平均晶粒尺寸先减小后增大,未变质时平均晶粒尺寸最大,为69.0?m;Cr加入量为2.0%(?)时,平均晶粒尺寸最小,仅为37.5?m;Cr加入量增至3.7%(?)时,平均晶粒尺寸增大至51.8?m.熔体中有效异质形核质点数增加是导致金属锰凝固组织细化的主要原因.
ICP-OES, DSC-TGA and metallographic microscope were used to study the effect of Cr addition on the solidification structure of metal manganese. The results showed that the solidification structure of metal manganese was mainly columnar dendrite after metamorphic treatment. However, the addition of Cr was beneficial to the refinement of dendritic structure. When the addition of Cr increased from 0 to 3.7%（ω）, the average grain size was first decreased and then increased. When the addition of Cr was 0, the average grain size of metal manganese was 69.0 μm. However, with the addition of Cr increased to 2.0%（ω）, the average grain size reached the minimun, and it was only 37.5 μm. Further increasing the addition of Cr to 3.7%（ω）, the average grain size would increase to 51.8 μm. The increase of number of effective heterogeneous nuclei in melt was the main reason for solidification structure refinement of metal manganese.
出处
《过程工程学报》
CAS
CSCD
北大核心
2017年第6期1291-1298,共8页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:51422405
51404229
51174187)
关键词
金属锰
凝固组织
Cr加入量
平均晶粒尺寸
有效异质形核质点
metal manganese
solidification structure
addition of Cr
average grain size
effective heterogeneous nuclei
