Hynense 282合金电渣熔炼工艺数值模拟与验证  

Numerical Simulation and Verification of Hynse 282 Alloy Electroslag Remelting Process

作　　者：林腾昌[1] 李龙飞 宁静[1] 梁强[1] 崔怀周[1] LIN Tengchang;LI Longfei;NING Jing;LIANG Qiang;CUI Huaizhou(Central Iron and Steel Research Institute,Beijing 100081,China)

机构地区：[1]钢铁研究总院,北京100081

出　　处：《铸造技术》2022年第2期109-113,共5页Foundry Technology

基　　金：国家重点研发计划项目(2017YFB07B030400);国家自然科学基金(51674092)。

摘　　要：Haynes 282合金是700℃超超临界发电机组高温段转子和气缸等构件的首选材料。利用Meltflow-ESR软件对Hynense 282电渣熔炼进行了数值模拟初步研究。结果表明,随着稳态熔速的降低,熔炼过程熔池深度减小,元素分布及一次凝固枝晶趋好,但渣皮厚度增加。采用4 kg/min稳态熔速时,φ400 mm铸型的熔池最大深度为0.23 m,与锭直径比值为52.3%。在电渣锭中段的Mo合金元素宏观分布合理,电渣锭心部的二次凝固枝晶间距随熔速降低而降低。Haynes282 alloy is the preferred material for rotor and cylinder in high-temperature section of 700℃ultra-supercritical power generation unit.A preliminary numerical simulation study on electroslag melting of Hynense 282 alloy was carried out by using Meltflow-ESR software.The results show that with the decrease of steady-state melting rate,the molten pool depth decreases,the elemental distribution and primary solidification dendrite become better,but the slag skin thickness increases.When theφ440 mm ingot type adopts 4 kg/min steady melting rate,the maximum depth of the molten pool is 0.23 m,and the ratio of such depth to the ingot diameter is 52.3%.The macroscopic distribution of Mo alloy elements in the middle of electroslag ingot is reasonable,and the secondary solidification dendrite spacing in the core of electroslag ingot decreases with the decrease of melting rate.

关 键 词：电渣熔炼 熔池 渣皮 二次枝晶间距 稳态熔速 

分 类 号：TF14[冶金工程—冶金物理化学] TG243[金属学及工艺—铸造]