基于实验与3D—CAFE法的高硅钢铸锭凝固行为

来源 :工程科学学报 | 被引量 : 0次 | 上传用户:dvvicky
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
通过空冷和水冷实验研究了高硅钢的铸态组织,发现高硅钢铸态组织主要由粗大的柱状晶构成,水冷铸锭中柱状晶比例高达90%以上.依据铸锭的化学成分和晶粒统计结果,确定了3D-CAFE法模拟所需的枝晶生长动力学系数及高斯分布等参数.采用CAFE法对不同冷却条件下高硅钢的凝固过程进行模拟研究,发现空冷铸锭较水冷铸锭的温度场更均匀,糊状区更宽阔;空冷铸锭呈“过渡式”凝固,水冷铸锭呈“分层式”凝固;空冷流场较水冷流场更稳定,凝固末期冒口处出现明显的抽吸现象,而水冷模拟结果中未观察到该现象.组织模拟结果发现,模拟得到的高硅钢凝固组织无论是形貌还是晶粒尺寸都与实验结果相一致;最后通过改变浇注温度模拟研究了过热度对高硅钢凝固组织的影响,结果表明,随着过热度的降低,铸锭中心等轴晶率提高,晶粒数量增加,晶粒尺寸变得细小. The as-cast microstructure of high-silicon steel was studied by air-cooling and water-cooling experiments. It was found that the as-cast microstructure of high-silicon steel mainly consisted of coarse columnar grains with the proportion of columnar grains as high as 90% .According to the chemical composition and grain statistics As a result, parameters such as dendritic growth kinetics coefficient and Gaussian distribution required for the 3D-CAFE method simulation were determined.Using CAFE method to simulate the solidification process of high-silicon steel under different cooling conditions, it was found that the air- The temperature field is more uniform and the mushy zone is wider; the air-cooled ingot shows “transitional” solidification, and the water-cooled ingot presents “layered” solidification; the air-cooled flow field is more stable than the water-cooled flow field, The phenomenon of aspiration was not observed in the water cooling simulation results.The results of the tissue simulation showed that the solidified microstructure of the high silicon steel was in good agreement with the experimental results both in morphology and in grain size. The influence of superheat degree on the solidified microstructure of high silicon steel was studied by temperature simulation. The results show that as the degree of superheat decreases, the equiaxed grain rate in the center of the ingot increases, the number of grains increases and the grain size becomes smaller.
其他文献
请下载后查看,本文暂不支持在线获取查看简介。南昌航空工业学院艺术与设计学院 江西财经大学艺术与会传播学院师生作品 Please download to view, this article does not su
当今,我国汽车进入迅猛增长时期,汽车产量增长速度连续7年超20%,孕育了车附件产品巨大的市场空间,事实也正证明了这一点。来自江苏泰州的薛文灿先生发明了一种快捷洁车电掸刷
本机是一款结构简单合理、操作维修方便、体积小、重量轻,能耗低、性能稳定的小型割稻机。该机不仅适合在大田块作业,更适用于小田块、山地、丘陵地区的收割作业。在水稻干田
含四氮杂环结构的配合物由于具有独特生理功能和化学性质引起了化学工作者的广泛关注,在分子识别、分子器件、生物学模拟、催化、荧光、磁学、离子传输等多个方面都进行了广泛
  Nano-titania/polymer composites were prepared and their anti-icing property was studied.The water contact angle of the composite materials was measured and
会议
在坊间,房屋中介和持有多余房产的房东据说正积极联合起来,一边统一抬高房价一边打造“奥运日租房”的概念。2007年9月1日,杨凯不得不进行他来北京两年内的第三次搬家。这一
今日在数字化的采用和推广下,所达到的功能远超过传统摄影的效果,绘画的存在价值再次被质疑。早在20世纪60年代即有的口号,宣布绘画已经死亡,之后达达艺术的崛起,直到观念艺
6月15日早9点,在中国日报社精心布置的象征胜利的“V”形会场上,纪念反法西斯战争胜利60周年网上漫画展发布会隆重召开。国务院新闻办公厅网络局副局长刘正荣到会并致辞高度
喷嚏是着凉感冒、上呼吸道黏膜受到刺激而引起的一种反应,是人体排除鼻内异物的一种本能反射。一个喷嚏要喷出1~2万个飞沫,喷出的细菌有十多万个,这些小飞沫可在空气中悬浮十
制备了SO42-/Al2OrZrO2固体酸催化剂,对其催化废弃动植物油脂与甲醇发生酯交换反应制备生物柴油的反应条件进行了研究.结果表明,催化剂SO42-/Al2O3-ZrO2表现出了较高的催化活