Relationship between furnace voltage signatures and the operational parameters arc power, CO pressure, and electrode gap during vacuum arc melting Inconel 718
- Sandia National Labs, Albuquerque, NM (USA)
Statistically designed experiments were conducted at two different production melt shops to evaluate the influence of arc power, CO pressure, and electrode gap on drop short and anode spike frequency. Approximately 11,000 kg of Inconel 718 alloy 0.4 m diameter electrodes were vacuum arc remelted into 0.5 m diameter ingots. Analyses of the experimental results produced regression models which show that the frequency of these events is inversely proportional to power, CO pressure, and gap. The inverse nature of this relationship is created by the behavior of the cathode spots and fluid mechanics of the liquid metal columns. Residuals generated by the models were analyzed with a matrix technique and the resulting error band indicates that the models are stable for control purposes.
- OSTI ID:
- 5311475
- Report Number(s):
- CONF-840909-; CODEN: TMPSA
- Journal Information:
- TMS (The Metallurgical Society) Paper Selection; (USA), Vol. 56; Conference: TMS-AIME fall meeting, Detroit, MI (USA), 16-20 Sep 1984; ISSN 0197-1689
- Country of Publication:
- United States
- Language:
- English
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INCONEL 718
VACUUM MELTING
CARBON MONOXIDE
CATHODES
CORRELATIONS
DISTANCE
ELECTRODES
FLUID MECHANICS
LIQUID METALS
MATHEMATICAL MODELS
POWER SUPPLIES
PRESSURE DEPENDENCE
PROCESS CONTROL
REGRESSION ANALYSIS
ALLOY-NI53CR19FE19NB5MO3
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHROMIUM ALLOYS
CONTROL
CORROSION RESISTANT ALLOYS
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FLUIDS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCONEL ALLOYS
IRON ALLOYS
LIQUIDS
MATERIALS
MATHEMATICS
MECHANICS
MELTING
METALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM A
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
STATISTICS
360101* - Metals & Alloys- Preparation & Fabrication