Compositional modification of nonmetallic inclusions in bloomery iron during post‐smelting treatments and its implication

Abstract HP magnet steel is designed for use wherever high magnetic permeability or high saturation values are required. Its magnetic qualities result from careful control of sulfur and residual elements plus the special deoxidization practice, which minimizes nonmetallic inclusions. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: CS-144. Producer or source: ISG Plate International Steel Group Inc.

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ARMCO FORMABLE 70 HR

Alloy Digest ◽

10.31399/asm.ad.sa0359 ◽

1979 ◽

Vol 28 (5) ◽

Keyword(s):

Nonmetallic Inclusions ◽

High Strength ◽

Heat Treating ◽

Rolled Steel ◽

Low Carbon ◽

Controlled Processing ◽

High Strength Level ◽

Hot Rolled ◽

Hot Rolled Steel ◽

Special Composition

Abstract ARMCO FORMABLE 70 HR is a hot-rolled steel with excellent ductility, weldability and edge-tear resistance at a minimum yield strength of 70,000 psi (483 MPa). For this relatively high strength level, it has unusually good fabricating properties that are the result of closely controlled processing of a fully killed, low-carbon, vacuum-degassed, columbium-alloyed steel. This special composition and processing practice minimize harmful nonmetallic inclusions that hamper formability. Typical applications include automotive reinforcements, truck parts and construction components. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-359. Producer or source: Armco Inc., Eastern Steel Division.

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Evolution of the Numerical Model Describing the Distribution of Non-Metallic Inclusions in the Tundish

Materials ◽

10.3390/ma14092229 ◽

2021 ◽

Vol 14 (9) ◽

pp. 2229

Author(s):

Tomasz Merder ◽

Jacek Pieprzyca ◽

Marek Warzecha ◽

Piotr Warzecha ◽

Artur Hutny

Keyword(s):

Numerical Model ◽

Liquid Steel ◽

Nonmetallic Inclusions ◽

Steel Production ◽

Cfd Modeling ◽

Water Model ◽

Working Space ◽

Production Stages ◽

Steel Flow ◽

Flow Controllers

Continuous casting is one of the steel production stages, during which the improvement in the metallurgical purity of steel can be additionally affected by removing nonmetallic inclusions (NMIs). This can be achieved by means of various types of flow controllers, installed in the working space of the tundish. The change in the steel flow structure, caused by those flow controllers, should lead to an intensification of NMIs removal from the liquid metal to the slag. Therefore, it is crucial to understand the behavior of nonmetallic inclusions during the flow of liquid steel through the tundish, and particularly during their distribution. The presented paper reports the results of the modeling studies of NMI distribution in liquid steel, flowing through the tundish. CFD modeling methods—using different models and computation variants—were employed in the study. The obtained CFD results were compared with the results of laboratory tests (using a tundish water model). The results of the performed investigations allow us to compare both methods of modeling; the investigated phenomena were microparticle distribution and mass microparticle concentration in the model fluid. The validation of the CFD results verified the analyzed computation variants. The aim of the research was to determine which numerical model is the best for describing the studied phenomenon. This will be used as the first phase of a larger research program which will provide for a comprehensive study of the distribution of NMIs flowing through tundish steel.

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