Reduction of non-metallic inclusions in the nitrogen-containing corrosion-resistant steels

Krylov S.А., Shcherbakov A.I., Makarov А.А., Tonysheva О.А.
UDC
669.018.8
DOI
10.18577/2307-6046-2017-0-5-1-1
Article PDF (Russian) (549.66 KB)
How to cite
Krylov S.А., Shcherbakov A.I., Makarov А.А., Tonysheva О.А. Reduction of non-metallic inclusions in the nitrogen-containing corrosion-resistant steels // Proceedings of VIAM. 2017. No. 5. DOI: 10.18577/2307-6046-2017-0-5-1-1. URL: https://test.viam.ru/en/journal/2017/5/1
Abstract

An important prerequisite for high-performance stainless steel VNS-65 (18Cr13Ni4Co4Si2NMo3) is a high purity non-metallic inclusions – oxides and sulfides, no more than 1 point in accordance with GOST 1778–70. The existing steel smelting technology VNS-65 outdoor furnace followed by electroslag remelting is not always provides the desired purity of the metal, resulting in a high-level properties of instability. To reduce the amount of nonmetallic inclusions is necessary to reduce to 2–3 times the oxygen content (less than 0,01%) and sulfur (less than 0,005%). The aim of the study is to develop a technology of steel smelting VNS-65, providing the reduction of non-metallic inclusions, improved stability properties through the use of new refining slag mixtures and technology microalloying rare earth metals, administered through the slag. The work within the framework of an integrated research area 8.2. «High-strength and corrosion-resistant welded structural steel with high fracture toug

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