Английский язык для инженеров сварочного производства. Гричин С.В - 125 стр.

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125
APPENDIX 1. WELDING THEORY & APPLICATION DEFINITIONS
ACETONE
A flammable, volatile liquid used in acetylene cylinders to dissolve
and stabilize acetylene under high pressure.
ACETYLENE
A highly combustible gas composed of carbon and hydrogen. Used as
a fuel gas in the oxyacetylene welding process.
ACTUAL THROAT
See THROAT OF FILLET WELD.
AIR-ACETYLENE
A low temperature flare produced by burning acetylene with air instead
of oxygen.
AIR-ARC CUTTING
An arc cutting process in which metals to be cut are melted by the heat
of the carbon arc.
ALLOY
A mixture with metallic properties composed of two or more elements,
of which at least one is a metal.
ALTERNATING CURRENT
An electric current that reverses its direction at regularly recurring
intervals.
AMMETER
An instrument for measuring electrical current in amperes by an
indicator activated by the movement of a coil in a magnetic field or by
the longitudinal expansion of a wire carrying the current.
ANNEALING
A comprehensive term used to describe the heating and cooling cycle
of steel in the solid state. The term annealing usually implies relatively
slow cooling. In annealing, the temperature of the operation, the rate of
heating and cooling, and the time the metal is held at heat depend upon
the composition, shape, and size of the steel product being treated, and
the purpose of the treatment. The more important purposes for which
steel is annealed are as follows to remove stresses; to induce softness;
to alter ductility, toughness, electric, magnetic, or other physical and
mechanical properties; to change the crystalline structure; to remove
gases; and to produce a definite microstructure.
ARC BLOW
The deflection of an electric arc from its normal path because of
magnetic forces.

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