3D-CAFE法凝固参数对430不锈钢凝固组织的影响  

Effect of solidification parameters on solidification structure of 430 stainless steel based on 3D-CAFE method

作　　者：庞瑞朋[1,2] 王福明[1,2] 王金龙[3] 李长荣[4] 张国庆[1,2] 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]北京科技大学冶金与生态工程学院,北京100083 [3]内蒙古包钢钢联股份有限公司技术中心,内蒙古包头014010 [4]北京科技大学材料科学与工程学院,北京100083

出　　处：《材料热处理学报》2013年第12期188-195,共8页Transactions of Materials and Heat Treatment

基　　金：中央高校基本科研业务费专项资金资助(FRF-SD-12-010A)

摘　　要：采用3D-CAFE法与实验相结合的方法,研究形核参数(n v,max,ΔT v,max)和过热度对430铁素体不锈钢凝固组织的影响。本文条件下得到nv,max越大,ΔTv,max越小,晶粒越细小。计算得到最佳过热度值为20℃,并进行了过热度为20℃的实验室实验,试样的凝固组织几乎全部为球形等轴晶,晶粒的平均直径从表面到中心依次增加。实验室试样的晶粒平均直径为918.07μm,3D-CAFE模型计算20℃过热度试样的晶粒平均直径为920.13μm。计算得到的凝固组织与实验结果基本一致。Effect of nucleation parameters（ n and AT ） and superheat degree on solidification structure of 430 ferrite stainless steel was investigated based on a Callular Automata-Finite Element （3D-CAFE） method combined with experiment. The bigger the value of n and the smaller the value of AT the finer the grains. The optimal superheat degree value was 20℃ by calculation, and the experiment showed that almost all solidification structure of the sample was globular equiaxed grains when the superheat degree was 20 ℃. From the surface to the center, the average diameter of grains increased gradually. The average grain diameter of the laboratory sample was 918.07 μm while that calculated based on 3D-CAFE model was 920. 13 μm when the superheat degree was 20 ℃. The solidification structure by calculation was basically the same as that of the experimental result.

关 键 词：过热度 柱状晶 等轴晶 3D—CAFE 

分 类 号：TG142.71[一般工业技术—材料科学与工程]