Английский для сварщиков. Гричин С.В. - 160 стр.

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160
A bending test in which the test specimen is bent to a definite shape by
means of a jig.
HAMMER WELDING:
A forge welding process.
HAND SHIELD:
A device used in arc welding to protect the face and neck. It is
equipped with a filter glass lens and is designed to be held by hand.
HARD FACING:
A particular form of surfacing in which a coating or cladding is applied
to a surface for the main purpose of reducing wear or loss of material
by abrasion, impact, erosion, galling, and cavitations.
HARD SURFACING:
The application of a hard, wear-resistant alloy to the surface of a softer
metal.
HARDENING:
a. The heating and quenching of certain iron-base alloys from a
temperature above the critical temperature range for the purpose of
producing a hardness superior to that obtained when the alloy is not
quenched. This term is usually restricted to the formation of
martensite.
b. Any process of increasing the hardness of metal by suitable
treatment, usually involving heating and cooling.
HEAT AFFECTED ZONE:
That portion of the base metal whose structure or properties have been
changed by the heat of welding or cutting.
HEAT TIME:
The duration of each current impulse in pulse welding.
HEAT TREATMENT:
An operation or combination of operations involving the heating and
cooling of a metal or an alloy in the solid state for the purpose of
obtaining certain desirable conditions or properties. Heating and
cooling for the sole purpose of mechanical working are excluded from
the meaning of the definition.
HEATING GATE:
The opening in a thermit mold through which the parts to be welded
are preheated.
HELMET:
A device used in arc welding to protect the face and neck. It is
equipped with a filter glass and is designed to be worn on the head.
HOLD TIME:

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