861. Mechanism of alloying element (Mn) evaporation during the vacuum induction melting of steel

In order to study the effect of tantalum to the microstructure and phase composition of Co-8.8Al-9.8W-XTa (X=0,2,at%) superalloy. The Co-8.8Al-9.8W-XTa (X=0,2) supperalloy used pure element powder, according to the ratio of different atomic percentage composition to make ingredients. It is mixed by planetary ball mill, pressed into blocks after the melting shape. Vacuum induction melting process was prepared by melting, after grinding, polishing, and after a volume of 5% perchloric acid and 95% of the electrolytic etching solution prepared in ethanol corrosion observed after analysis of the microstructure and phase composition by OM and XRD analysis. It can be found that the 9.8W and 2Ta alloy were mainly composed of rich γ-Co matrix of austenite precipitation of γ phase and coherent with matrix of the L12 structure of γ′-Co3(Al,W) phase. In addition, Ta element has effect on grain refinement and the number of γ′-Co3(Al,W) phase refines grain.

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Effect of Niobium/Molybdenum Microalloying on SS316LN Steel

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.110-116.1259 ◽

2011 ◽

Vol 110-116 ◽

pp. 1259-1263

Author(s):

Jyoti Prakash Dhal ◽

Subash Chandra Mishra

Keyword(s):

Tensile Strength ◽

Stainless Steel ◽

Electron Microscope ◽

Melting Furnace ◽

Vacuum Induction Melting ◽

Microalloyed Steels ◽

Induction Melting ◽

Alloying Element ◽

Copper Mould ◽

Scanning Electron

In recent years SS316LN microalloyed stainless steel is preferred for use as jacket material for Nb3Sn superconductor strands/wires. In the present investigation, microalloyed SS316LN is prepared in a vacuum induction melting furnace; Niobium and Molybdenum in their ferroalloy stage are considered as alloying element. This microalloyed steels are cast in water cooled copper mould. The tensile strength and elongation are measured and the fracture surface is studied under scanning electron microscope. It is observed that, there is a reduction of tensile strength and decrease in hardness of the steels prepared with addition of either/both the alloying elements; however there is an increase in ductility, which is helpful for cold rolling operation. From the micrographs it is observed that nitride precipitates are formed along the grain boundary, but formation of chromium carbide precipitates is reduced.

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Microstructure in soft magnetic E3 (S1, Al) (Sendust) alloys

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100105916 ◽

1988 ◽

Vol 46 ◽

pp. 770-771

Author(s):

June D. Kim

Keyword(s):

Electron Microscopy ◽

Magnetic Properties ◽

Ternary Phase Diagram ◽

Vertical Tube ◽

Vacuum Induction Melting ◽

Induction Melting ◽

Soft Magnetic ◽

Quenching Temperature ◽

Thin Foils ◽

Vertical Tube Furnace

Iron-base alloys containing 8-11 wt.% Si, 4-8 wt.% Al, known as “Sendust” alloys, show excellent soft magnetic properties. These magnetic properties are strongly dependent on heat treatment conditions, especially on the quenching temperature following annealing. But little has been known about the microstructure and the Fe-Si-Al ternary phase diagram has not been established. In the present investigation, transmission electron microscopy (TEM) has been used to study the microstructure in a Sendust alloy as a function of temperature.An Fe-9.34 wt.% Si-5.34 wt.% Al (approximately Fe3Si0.6Al0.4) alloy was prepared by vacuum induction melting, and homogenized at 1,200°C for 5 hrs. Specimens were heat-treated in a vertical tube furnace in air, and the temperature was controlled to an accuracy of ±2°C. Thin foils for TEM observation were prepared by jet polishing using a mixture of perchloric acid 15% and acetic acid 85% at 10V and ∼13°C. Electron microscopy was performed using a Philips EM 301 microscope.

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UDIMET 700

Alloy Digest ◽

10.31399/asm.ad.ni0051 ◽

1987 ◽

Vol 36 (1) ◽

Keyword(s):

Gas Turbines ◽

Base Alloy ◽

Heat Treating ◽

Vacuum Arc ◽

Vacuum Induction Melting ◽

Induction Melting ◽

Nickel Base Alloy ◽

Vacuum Arc Remelting ◽

Temperature Performance ◽

Nickel Base

Abstract UDIMET 700 is a wrought nickel-base alloy produced by vacuum-induction melting and further refined by vacuum-arc remelting. It has excellent mechanical properties at high temperatures. Among its applications are blades for aircraft, marine and land-based gas turbines and rotor discs. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-51. Producer or source: Special Metals Corporation. Originally published March 1959, revised January 1987.

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ALLVAC AC718

Alloy Digest ◽

10.31399/asm.ad.ni0394 ◽

1991 ◽

Vol 40 (7) ◽

Keyword(s):

Corrosion Resistance ◽

Physical Properties ◽

Tensile Properties ◽

Heat Treating ◽

Vacuum Arc ◽

Vacuum Induction Melting ◽

Induction Melting ◽

Good Ductility

Abstract Allvac 718 is produced by vacuum induction melting followed by vacuum arc or electroslag consumable remelting. Th alloy has excellent strength and good ductility up to 1300 F (704 C). It also has excellent cryogenic properties. It has unique welding characteristics. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-394. Producer or source: Allvac Inc..

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NICKELVAC N

Alloy Digest ◽

10.31399/asm.ad.ni0388 ◽

1990 ◽

Vol 39 (12) ◽

Keyword(s):

Solid Solution ◽

Corrosion Resistance ◽

Heat Treating ◽

Vacuum Induction Melting ◽

Induction Melting ◽

Good Oxidation Resistance ◽

Temperature Performance ◽

Molten Fluoride ◽

Fluoride Salts ◽

Container Material

Abstract NICKEL VAC N was originally developed as a container material for molten fluoride salts. It is a moderate strength, solid solution strengthened alloy with good oxidation resistance to 1800 F. It has excellent resistance to fluoride salts in the range 1300-1600 F. It is produced by vacuum induction melting followed electroslag remelting. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-388. Producer or source: Teledyne Allvac.

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NICKELVAC X-751

Alloy Digest ◽

10.31399/asm.ad.ni0387 ◽

1990 ◽

Vol 39 (11) ◽

Keyword(s):

Corrosion Resistance ◽

Physical Properties ◽

Tensile Properties ◽

Aluminum Content ◽

Heat Treating ◽

Vacuum Arc ◽

Vacuum Induction Melting ◽

Induction Melting ◽

Service Temperature ◽

Maximum Service Temperature

Abstract NICKEL VAC X-751 is a modification of NICKEL VAC X-750 carrying higher aluminum content (0.90-1.50 vs 0.4-1.0%). This raises the maximum service temperature 100 F(55 C) to 1600 F(871 C). NICKEL VAC X-751 has a simplified and shortened heat treating cycle relative to NICKEL VAC X-750. It is produced by vacuum induction melting followed by vacuum arc or electroslag remelting. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-387. Producer or source: Teledyne Allvac.

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UDIMET 90

Alloy Digest ◽

10.31399/asm.ad.ni0174 ◽

1972 ◽

Vol 21 (6) ◽

Keyword(s):

Corrosion Resistance ◽

Base Alloy ◽

Heat Treating ◽

Vacuum Arc ◽

Vacuum Induction Melting ◽

Induction Melting ◽

Nickel Base Alloy ◽

Vacuum Arc Remelting ◽

Temperature Performance ◽

Nickel Base

Abstract UDIMET 90 is a nickel-base alloy developed for elevated-temperature service. It is produced by vacuum induction melting and vacuum arc remelting techniques to develop optimum properties. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-174. Producer or source: Special Metals Corporation.

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VASCOMAX T-300

Alloy Digest ◽

10.31399/asm.ad.sa0454 ◽

1990 ◽

Vol 39 (12) ◽

Keyword(s):

Heat Treatment ◽

Fracture Toughness ◽

Tensile Strength ◽

High Temperature ◽

Heat Treating ◽

Vacuum Arc ◽

Vacuum Induction Melting ◽

Induction Melting ◽

Vacuum Arc Remelting ◽

Temperature Performance

Abstract VASCOMAX T-300 is an 18% nickel maraging steel in which titanium is the primary strengthening agent. It develops a tensile strength of about 300,000 psi with simple heat treatment. The alloy is produced by Vacuum Induction Melting/Vacuum Arc Remelting. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SA-454. Producer or source: Teledyne Vasco.

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