Английский для сварщиков. Гричин С.В. - 56 стр.

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Make a summary of alternative welding processes indicating their

application capabilities. Start like this:

1. Cold welding that is welding without heat makes it possible to join thin

sheets of aluminum.

2. Friction welding…

PART 4. ARC AND GAS WELDING IN DETAIL

Lead-in

Remember the definition and description of arc welding from the previous

chapters. What, in your opinion, makes arc welding one of the two main

welding processes so widely applied in modern industry?

Find the English equivalents for the following Russian phrases in the text:

Постоянный/переменный ток, электрическая дуга, присадочный

материал, источник питания, положительно заряженный анод, остатки

флюса, волна типа "синусоида", гармоническая волна/ прямоугольная

волна, плавящийся электрод, свариваемые металлы, пересечение

нулевого уровня, пленка ПВХ, светофильтры, наплавка, горючие

материалы

Reading

Text 1. Arc Welding

Arc welding refers to a group of welding processes that use a welding

power supply to create an electric arc between an electrode and the base

material to melt metals at the welding point. They can use either direct (DC)

or alternating (AC) current, and consumable or non-consumable electrodes.

The welding region is sometimes protected by some type of inert or semi-

inert gas, known as a shielding gas, and filler material is sometimes used as

well.