welding atmosphere
71slag — slag1 slagable, adj. slagability, n. slagless, adj. slaglessness, n. /slag/, n., v., slagged, slagging. n. 1. Also called cinder. the more or less completely fused and vitrified matter separated during the reduction of a metal from its ore. 2.… …
72tungsten processing — Introduction preparation of the ore for use in various products. Tungsten exhibits a body centred cubic (bcc) crystal lattice. It has the highest melting point of all metals, 3,410° C (6,170° F), and it has high conductivity for… …
73Casting defect — A casting defect is an irregularity in the metal casting process that is undesired. Some defects can be tolerated while others can be repaired otherwise they must be eliminated. They are broken down into five main categories: gas porosity,… …
74Niobium — zirconium ← niobium → molybdenum V ↑ Nb ↓ Ta …
75Copper — For other uses, see Copper (disambiguation) …
76Refractory metals — are a class of metals that are extraordinarily resistant to heat and wear. Refractory metals are said to be poorly resistant to oxidation and corrosion. [UFL EMA 6625: Advanced Metal Processing, Summer 2008, Lecture 09] These properties make them …
77Induction heating — is the process of heating an electrically conducting object (usually a metal) by electromagnetic induction, where eddy currents are generated within the metal and resistance leads to Joule heating of the metal. An induction heater (for any… …
78Plasma window — The plasma window (not to be confused with a plasma shield [cite news| last = Shiga| first =David| coauthors =| title =Plasma bubble could protect astronauts on Mars trip| work =| pages =| language =| publisher =NewScientist| date =2006 07 17|… …
79Metal bellows — are elastic vessels that can be compressed when pressure is applied to the outside of the vessel, or extended under vacuum. When the pressure or vacuum is released, the bellows will return to its original shape (provided the material has not been …
80nitrogen group element — ▪ chemical elements Introduction any of the chemical elements that constitute Group Va of the periodic table (see Figure >). The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). The elements share… …
