Y.C. Miao
,
X.M. Zhang
,
G.D. Wang
金属学报(英文版)
The position of the solidification completed temperature of twin roll stainless strip casting process is very important to the quality of the casting strip. In order to control this position, the solidification completed temperature should be known at first.The present paper first simulated dendritic microsegregation under conditions of twin roll stainless strip casting, and got the relationship between the temperature and solid fraction of the mush zone. The temperatures such as ZDT (equal to the solidification completed temperature) and LIT (liquid impenetrable temperature), et al., also were obtained. Then by using the turbulent model, the flow and thermal fields of the pool of the twin roll stainless strip casting, and the speed and temperature fields of different casting speeds were given and also explained. The results are coincident with the experimental result. Combined with the results of these two simulations. the appropriated casting speed was found.
关键词:
strip casting
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null
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null
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null
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蔡娜娜
,
梁高飞
,
方园
,
于艳
,
王俊
机械工程材料
利用共聚焦激光扫描显微镜对薄带连铸低碳钢过冷奥氏体的组织转变进行了原位观察。结果表明:薄带连铸低碳钢原始奥氏体晶粒粗大,平均粒径约200μm,室温组织主要由贝氏体和多边形铁素体组成;在过冷奥氏体组织转变过程中,BF板条主要形核位置为原奥氏体晶界上、奥氏体晶内夹杂处、晶界多边形铁素体或已生长的BF板条上,并且后形核生长的BF板条不会穿过先形核生长的BF板条,前后形核生长的BF板条有一定的取向角度;BF板条的生长速率受温度、形核位置和生长取向的影响。
关键词:
薄带连铸
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低碳钢
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过冷奥氏体
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原位观察
王国栋
,
刘振宇
中国材料进展
我国钢铁产业目前正面临资源匮乏,环境和自然生态不堪重负等严重问题,开发合金元素用量更低、力学性能更高、使用寿命更长的节约型高性能结构钢是解决我国钢铁工业可持续发展问题的主要途径。综述了以超快速冷却为核心的新一代TMCP工艺和以薄带铸轧为代表的“近终成形”技术的相关冶金学原理,重点介绍了它们在开发新一代节约型高性能结构钢产品中的应用和进展,指出了这些新技术在我国的应用前景。
关键词:
新一代TMCP
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超快冷
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冷却路径控制
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钢材强韧化
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薄带铸轧
谢顺卿
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焦海涛
,
韩琼琼
,
张元祥
,
王洋
,
曹光明
,
李成刚
,
许云波
机械工程材料
doi:10.11973/jxgccl201605004
针对1.5 mm 厚双辊薄带连铸 Fe-1.3%Si 无取向硅钢铸带在不同变形量(56.7%,66.7%,76.7%)下进行冷轧,之后再在不同温度(800,850,900,950℃)和时间(1,3,5,7 min)下进行退火处理,研究了硅钢的显微组织、析出相和磁性能.结果表明:在退火过程中钢中的析出物以MnS为主,其尺寸主要在30~40 nm之间,对晶粒的钉扎作用较为明显;退火硅钢的磁感B50稳定在1.77~1.80 T;随着变形量从56.7%增大到76.7%,再结晶晶粒明显细化,退火硅钢的铁损P15/50从5.54 W.kg-1下降到4.23 W.kg-1;变形量为66.7%的硅钢在900℃退火5 min后,再结晶晶粒较大,硅钢的磁性能最优,P15/50约为4.54 W.kg-1.
关键词:
冷轧
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退火
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薄带连铸
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无取向硅钢
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磁性能