共查询到18条相似文献,搜索用时 78 毫秒
1.
2.
连铸板坯凝固的传热模型 总被引:2,自引:0,他引:2
依据武钢板坯连铸机的生产条件,建立了板坯凝固过程传热模型,分析了影响板坯出连铸机温度的主要因素,得出适当提高拉速、控制二冷喷水量和关掉二冷末端冷却水能提高铸坯温度、降低能耗。 相似文献
3.
以新余钢铁公司—炼钢板坯连铸机为研究对象,建立了板坯—维非稳态传热数学模型。在此基础上,依据普碳钢的特点,建立了铸坯传热计算仿真模型。对模型初步验证的结果表明模型与生产实际相符。 相似文献
4.
5.
6.
7.
连铸板坯凝固传热模型研究及应用 总被引:1,自引:0,他引:1
依据板坯连铸机工艺条件,利用铸坯凝固过程传热数学模型计算了铸坯凝固过程温度场分布和坯壳生长情况,并探讨连铸工艺因素对铸坯温度和凝固过程的影响,示例性的提出了提高铸坯温度的工艺手段。 相似文献
8.
以鞍钢厚板坯连铸机为目标机型,按照传热学理论建立连铸二冷凝固传热数学模型.应用此模型对X65管线钢和船板钢的连铸过程进行仿真模拟,模拟结果同实测值基本吻合,验证了模型的可靠性. 相似文献
9.
10.
11.
12.
13.
14.
板坯连铸合理总轻压下量是决定轻压下效果的重要工艺参数之一,采用数学模型手段对合理总轻压下量的定量计算进行了研究。通过建立2D铸坯凝固传热分析模型及轻压下过程2D热-力耦合模型,对比铸坯凝固末端枝晶间残余浓化钢水体积收缩与轻压下引起的糊状区压缩变形量,研究了铸坯厚度、轻压下起始位置处固相率等因素对给定钢种合理总轻压下量的影响。结果表明:铸坯厚度对合理总轻压下量有显著影响,厚度分别为150、230、300和400mm时,开始实施轻压下工艺时铸坯横截面中心节点固相率在0.7~0.3之间变化时,轻压下区间内的合理总压下量分别应为2.42~3.14、2.95~4.65、3.66~5.82和4.55~7.26mm。 相似文献
15.
ZHU Miaoyong CAI Zhaozhen School of Materials Metallurgy Northeastern University Shenyang China 《Baosteel Technical Research》2010,(Z1):26
Thermal behavior of the solidifying shell in continuous casting mold is very important to final steel products.In the present work,one two-dimension transient thermal-mechanical finite element model was developed to simulate the thermal behavior of peritectic steel solidifying in slab continuous casting mold by using the sequential coupling method.In this model,the steel physical properties at high temperature was gotten from the micro-segregation model withδ/γtransformation in mushy zone,and the heat flux was obtained according to the displacement between the surface of solidifying shell and the hot face of mold as solidification contraction,the liquid-solid structure and distribution of mold flux,and the temperature distribution of slab surface and mold hot face,in addition,the rate-dependent elastic-viscoplastic constitutive equation was applied to account for the evolution of shell stress in the mold.With this model,the variation characteristics of surface temperature,heat flux, and growth of the solidifying shell corner,as well as the thickness distribution of the liquid flux,solidified flux,air gap and the corresponding thermal resistance were described. 相似文献
16.
由于高质量薄板坯连铸工艺对冷却条件要求非常严格,因此,以薄板坯连铸工艺为研究对象,建立了凝固传热过程的数学模型.定量地分析了各种工艺参数对结晶器内和二冷区钢水凝固过程的影响,以指导生产实践,也可作为进一步开发在线控制模型的基础. 相似文献
17.
ABSTRACTAn experimental apparatus for simulation of continuous casting process of GCr15 bearing steel billet is established. With the apparatus, the billets of diameter 140?mm are casted in various superheats and cooling conditions. The solidification macrostructure, dendrite morphology, segregation and carbide are investigated. It is shown that melting superheats and cooling conditions remarkably influence the microstructure and solute segregation. It is found that the secondary dendrite arm spacing of the steel increases with the increase of the superheat temperature, and with decrease of the cooling rate. Lower superheat with higher cooling rate promotes the refining of the microstructure. Refining equiaxed grains structure in the centre of the billet leads to lower segregation of carbon. Furthermore, with increasing cooling rates, the spacing of the pearlite laminar is refined and the precipitation of proeutectic carbides is suppressed. 相似文献
18.