Numerical Simulation and Verification of Hynse 282 Alloy Electroslag Remelting Process

Author of the article:LIN Tengchang, LI Longfei, NING Jing, LIANG Qiang, CUI Huaizhou

Author's Workplace：Central Iron and Steel Research Institute

Key Words： ESR; molten pool; slag skin; secondary dendrite spacing; steady state melting rate

Abstract：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.