水平连铸Inconel 600合金温度场模拟及试验研究  

Numerical Analysis of Temperature Field in Horizontal Continuous Casting Process for Inconel 600

作　　者：曹健晟 杨帆 余建波[1,2] 任忠鸣 Cao Jiansheng;Yang Fan;Yu Jianbo;Ren Zhongmin(State Key Laboratory of Advanced Special Steel Melallurigical and Preparation;School of Materials Science and Engineering,Shanghai University)

机构地区：[1]省部共建高品质特殊钢冶金与制备国家重点实验室 [2]上海大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2023年第2期178-184,共7页Special Casting & Nonferrous Alloys

基　　金：上海市扬帆计划资助项目(21YF1413000);上海市启明星计划资助项目(20QA1403800);上海市曙光计划资助项目(20SG42)。

摘　　要：利用ProCAST软件研究了拉坯速度和冷却水流量对Inconel 600水平连铸的初始凝固界面和凝固中心偏移的影响,并通过测温结果校核模拟参数,使模拟结果和试验结果最大误差在10%以内。结果表明,冷却水流量从12 L/min增加到22 L/min时,初始凝固界面后移6.52 mm,初始凝固中心向上的偏移量从0.44 mm增加到1.07 mm;拉坯速度从120 mm/min增加到240 mm/min,初始凝固界面向结晶器出口处前移了15.4 mm,初始凝固中心向上偏移量从1.03 mm减小到0.51 mm。冷却水流量为16 L/min时,拉速的提高使得铸坯的凝固中心偏移从0.73 mm降低至0.44 mm,铸坯断面的平均显微硬度(HV)从412.2增加到432.7,且断面的硬度均匀性得到改善。铸坯凝固组织均呈强径向取向柱状晶。优化的工艺参数:铸造温度为1 450℃,冷却水流量为16 L/min,拉坯速度为200 mm/min。The effects of drawing speed and cooling water flow on the initial solidification interface and solidification center shift in horizontal continuous casting for Inconel 600 were investigated by ProCAST software. The simulation parameters were corrected by temperature measurement results, which reduced the maximum error between the simulation and experimental results within 10%. The results indicate that the initial solidification interface is moved backward by 6.52 mm, and the upward deviation of the initial solidification center is increased from 0.44 mm to 1.07 mm as the cooling water flow rate increased from 12 L/min to 22 L/min. When the drawing speeds is increased from 120 mm/min to 240 mm/min, the initial solidification interface is moved forward by 15.4 mm towards the outlet of the crystallizer, and the initial solidification center deviation is decreased from 1.03 mm to 0.51 mm. At a cooling water flow rate of 16 L/min, the solidification center deviation of the cast billets is reduced from 0.73 mm to 0.44 mm due to the increase in drawing speed, where the average microhardness of sections is increased from 412.2 HV to 432.7 HV, and the hardness uniformity is significantly improved. The solidification structure of the cast billets presents strongly radially oriented columnar crystals. The optimal process parameters can be obtained as follows: casting temperature of 1 450 ℃, cooling water flow of 16 L/min and drawing speed of 200 mm/min.

关 键 词：水平连铸 数值模拟 凝固中心偏移 显微硬度 

分 类 号：TG146.15[一般工业技术—材料科学与工程] TG249.7[金属学及工艺—金属材料] TP311[金属学及工艺—金属学]