How to Play High Nickel-Containing High Alloy Plates

摘要

The present invention relates to the production of high Ni-containing high alloy thick plate material for use in low temperature gas containers such as LNG; The purpose is to provide a continuous casting method for producing a 6-15% Ni-containing high alloy thick plate material, which is usually produced through the ingot-fragmentation process, by continuous casting.;The present invention for achieving the above object is a continuous casting method while injecting molten steel refined into the mold, the molten steel is molten steel for high alloy thick plate material containing 6-15% nickel; Casting rate is 0.8-1.0 m / min while injecting a flux for medium carbon having a basicity of 0.9-1.2 into the molten steel surface while adjusting the taper of the short side of the mold in the range of 1.05-1.10%; The technical gist of the method is to play a high nickel-containing high alloy thick plate material which is continuously cast with the secondary cooling ratio water poured into the bottom of the mold in the range of 0.40 to 0.45 l / kg.