AN EXPERIMENTAL STUDY OF THE ELECTRIC ARC DURING VACUUM ARC REMELTING

2000 ◽  
Vol 4 (4) ◽  
pp. 14 ◽  
Author(s):  
P. Chapelle ◽  
J.P. Bellot ◽  
A. Jardy ◽  
T. Czerwiec ◽  
X. Robbe ◽  
...  
Keyword(s):  
Experimental Study ◽  
Electric Arc ◽  
Vacuum Arc ◽  
Vacuum Arc Remelting

Consolidation of Compacted Zircaloy Chips via Vacuum Arc Melting - Analysis of the Electric Arc

2005 ◽  
Vol 498-499 ◽  
pp. 258-263 ◽  
Author(s):  
C.S. Mucsi ◽  
Rubens Nunes de Faria Jr. ◽  
E. Galego ◽  
J.L. Rossi
Keyword(s):  
Fourier Transforms ◽  
Electric Arc ◽  
Vacuum Arc ◽  
Vacuum Arc Remelting ◽  
Electrical Arc ◽  
Arc Melting ◽  
Vacuum Arc Melting ◽  
Linear Behaviour ◽  
Melting Analysis ◽  
Electric Signals

The main objective of this work is to present the preliminary results on the analysis of the signals arising from the electrical arc, during the vacuum arc remelting of Zircaloy electrodes, aiming the automation of the fusion process. Zircaloy electrodes were made from compacted chips resultant of the machining of Zircaloy rods. The melts were performed in a prototype (vacuum arc remelting) VAR furnace under low pressure of argon and the arc was fed by a constant DC power source. Both filtered and unfiltered signals were recorded by means of a data acquisition system. The fast Fourier transforms FFT and autocorrelation integral were used as tools for data analysis. The result showed that the events occurring within the electric arc have a strong influence on the electric signals. The analysis allowed inferring that the VAR electric arc system has mainly a chaotic behaviour and sporadic periods of linear behaviour. The conclusion of this work is that a control system may be developed, based on the modelling of the non-linear behaviour of the arc, mainly chaotic. This may allow the achievement of an automatic control for the process and yield better quality products.

Electric current partition during vacuum arc remelting of steel: An experimental study

2013 ◽  
Vol 213 (2) ◽  
pp. 291-299 ◽  
Author(s):  
Aurore Risacher ◽  
Pierre Chapelle ◽  
Alain Jardy ◽  
Jessica Escaffre ◽  
Henri Poisson
Keyword(s):  
Experimental Study ◽  
Electric Current ◽  
Vacuum Arc ◽  
Vacuum Arc Remelting

scholarly journals Correlation of radius of cathode spot of vacuum arc of metals on the size of generated droplets

2021 ◽  
Vol 66 (4) ◽  
pp. 391-398
Author(s):  
G. V. Markov ◽  
A. T. Volochko ◽  
V. G. Zaleski ◽  
N. Yu. Melnik
Keyword(s):  
Experimental Study ◽  
Cathode Spot ◽  
Simple Relation ◽  
Electric Arc ◽  
Vacuum Arc ◽  
Alloy Droplet ◽  
Spot Radius ◽  
Droplet Sizes ◽  
Arc Current ◽  
Pure Metals

The simple relation to estimate the cathode spot radius of a vacuum arc of pure metals is obtained. On its basis, is established between the cathode spot radius and the size of droplets generated by the cathode spot a correlation. This enables to find ways to reduce droplets in the plasma flow, which forms coatings by the vacuum electric arc method. The paper presents the results of experimental study of the droplet sizes depending on the vacuum arc current iд. The size and amount of the droplets on an area of 1 mm2 of the coating surface are determined using the ImageSP program. As the initial data, the microstructures of the coatings are used with an increase of: ç100, ç200, ç500, ç1000, ç1500. The droplets have been generated by a cathode spot of a vacuum arc for the alloy of the composition, at.%: 68Al–8Cr–4Nb–20Si. It is established that the number of droplets with a diameter of < 2 μm is generated most of all, and the number of droplets with a diameter > 10 μm is generated least of all. The number of generated droplets with a diameter from 2 to 10 μm slightly depends on the arc current iд. It is noted that the diameter of the alloy droplet is smaller than the diameter of the droplets generated by the cathode spot on its components due to the fact that the radius of the cathode spot on the alloy is smaller than the radius of the cathode spot on its pure components.

Primary Mill Fabrication

2013 ◽  
pp. 1-45
Keyword(s):  
Titanium Alloys ◽  
Electric Arc ◽  
Vacuum Arc ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Blast Furnaces ◽  
Basic Oxygen ◽  
Electric Arc Furnaces ◽  
Vacuum Arc Remelting ◽  
Arc Furnaces

Abstract This chapter discusses the processes, procedures, and equipment used in the production of iron, steel, aluminum, and titanium alloys. It describes the design and operation of melting and refining furnaces, including blast furnaces, basic oxygen and electric arc furnaces, vacuum induction melting furnaces, and electroslag and vacuum arc remelting furnaces. It also covers casting, rolling, and annealing procedures and describes the basic steps in aluminum and titanium production.

UDIMET 700

Alloy Digest ◽  
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.

UDIMET 90

Alloy Digest ◽  
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.

LESCALLOY 15-5 VAC-ARC

Alloy Digest ◽  
1991 ◽  
Vol 40 (8) ◽  
Keyword(s):  
Stainless Steel ◽  
Precipitation Hardening ◽  
Martensitic Stainless Steel ◽  
Heat Treating ◽  
Gas Content ◽  
Vacuum Arc ◽  
Steel Company ◽  
Delta Ferrite ◽  
Clean Steel ◽  
Vacuum Arc Remelting

Abstract LESCALLOY 15-5 VAC-ARC is a precipitation hardening martensitic stainless steel with minimal delta ferrite. Vacuum arc remelting in the production of the alloy provides a low gas content, clean steel with optimum transverse properties. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-522. Producer or source: Latrobe Steel Company.

VASCOMAX T-300

Alloy Digest ◽  
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.

ALLVAC Ti-15Mo

Alloy Digest ◽  
2005 ◽  
Vol 54 (7) ◽  
Keyword(s):  
Vacuum Arc ◽  
Unique Combination ◽  
Vacuum Arc Remelting ◽  
Beta Alloy ◽  
Metastable Beta

Abstract Allvac Ti-15Mo is a metastable beta alloy melted in a vacuum arc remelting (VAR) furnace to minimize segregation. The alloy has a unique combination of properties and is used in the medical, chemical, and aerospace industries. This datasheet provides information on composition. Filing Code: TI-136. Producer or source: Allvac, an Allegheny Technologies Company.

FINKL 420M PREMIUM QUALITY

Alloy Digest ◽  
1998 ◽  
Vol 47 (2) ◽  
Keyword(s):  
Stainless Steel ◽  
Physical Properties ◽  
Heat Treating ◽  
Vacuum Arc ◽  
Vacuum Arc Remelting ◽  
Aisi 420

Abstract Finkl 420 Premium Quality stainless steel is a modification of AISI 420 with vacuum arc degassing and vacuum arc remelting. The modification results in a refined structure yielding cleanliness, strength, and isotropic properties. This datasheet provides information on composition, physical properties, and hardness. It also includes information on heat treating. Filing Code: SS-707. Producer or source: A. Finkl & Sons Company.

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