王卫华
,
刘洋
,
王文军
,
陈霞
钢铁研究
利用ANSYS商业有限元软件,建立了板坯连铸结晶器二维凝固传热数学模型.采用传热和应力、应变直接耦合的方法,对结晶器内钢液在浇铸过程中的凝固传热进行了数值模拟分析,并对同一拉速下的3个典型钢种和同一钢种在不同拉速下的铸坯窄面温度分布和收缩量进行了讨论.结果表明:在结晶器出口处,3个钢种板坯窄面中心温度高低顺序为:X70＞SS400/D36;3个钢种板坯窄面中心收缩量大小顺序均为:X70＞D36＞SS400;同一钢种的拉速增加0.1m/min,铸坯窄面中心温度升高23.75℃.
关键词:
铸坯
,
结晶器
,
凝固收缩
,
数值模拟
张彩军
,
刘涛
,
王昂
,
顾克井
,
朱立光
钢铁钒钛
doi:10.7513/j.issn.1004-7638.2014.02.019
以某公司矩形坯连铸机结晶器为研究对象,利用数值模拟和物理模拟相结合的方法,对结晶器内自由液面流动和流场进行系统分析,分别研究不同出口面积比、不同浸入深度、不同水口倾角等条件下结晶器内钢液流动状态,并对相应的工艺参数进行优化.结果表明,对于断面为150mm×440mm的矩形坯,最优的结晶器浸入式水口出口面积比为2.42,内径30 mm,侧开孔角度25°.
关键词:
连铸
,
结晶器
,
浸入式水口
,
数值模拟
,
物理模拟
,
结构优化
S.H.Liang and Z.K.Fan The Department of Material and Engineering
,
Xi'an University of Technology
,
Xi'an 710048
,
China
金属学报(英文版)
A kind of Cu base composite reinforced by 0 1μm Al 2O 3 particles were prepared by hot pressing and sintering process for steel continuous casting mould. The microstructure and properties were studied. The results show that the Al 2O 3 particle distribution is uniform, and the particles refine the grain size. The tensile fracture is a mixture of quasi cleavage and dimple due to the moderate interface strength. As a result, the composite has better soft resistance and wear resistance than those of Cu and Cu alloy. With increase in super fine Al 2O 3, the density and electric conductivity of the composite decrease, but hardness and strength increase.
关键词:
hot pressing and sintering
,
null
,
null
,
null
