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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
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- DOI:
- 作者:
- 林腾昌，李龙飞，宁 静，梁 强，崔怀周
LIN Tengchang, LI Longfei, NING Jing, LIANG Qiang, CUI Huaizhou
- 作者单位:
- 钢铁研究总院
Central Iron and Steel Research Institute
- 关键词:
- 电渣熔炼；熔池；渣皮；二次枝晶间距；稳态熔速
ESR; molten pool; slag skin; secondary dendrite spacing; steady state melting rate
- 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 the φ440 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.