Английский для сварщиков. Гричин С.В. - 29 стр.

UptoLike

ВУЗ: 

ТПУ | Томск

Составители: 

Рубрика: 

29
standard merchant ships with a speed unequalled in the history of merchant
shipping."
Russell Meredith working at Northrop Aircraft Company in 1939-1941
invented the TIG process. This new process was called "Heliarc" as it used an
electric arc to melt the base material and helium to shield the molten puddle.
Mr.Jack Northrop's dream was to build a magnesium airframe for a lighter,
faster warplanes and his welding group invented the process and developed
the first TIG torches. The patents were sold to Linde who developed a
number of torches for different applications. They also developed procedures
for using Argon which was more available and less expensive than Helium.
In 1957, the flux-cored arc welding process debuted, in which the self-
shielded wire electrode could be used with automatic equipment, resulting in
greatly increased welding speeds, and that same year, plasma arc welding
was invented. Electroslag welding was released in 1958, and it was followed
by its cousin, electrogas welding, in 1961.
Other recent developments in welding include the 1958 breakthrough
of electron beam welding, making
deep and narrow welding possible
through the concentrated heat
source. Following the invention of
the laser in 1960, laser beam welding
debuted several decades later, and
has proved to be especially useful in
high-speed, automated welding.
Both of these processes, however, continue to be quite expensive due the
high cost of the necessary equipment, and this has limited their applications.
After-reading activity
Find equivalents for the following words combinations in the text:
Угольный электрод, электрод с покрытием, защитный газ, торговое
судоходство, открытая печь, военный самолет, открытый горн,
источник тепла, признавать преимущества электродуговой сварки,
высокая стоимость.
Match the dates, names and inventions from the following table:
1540 Vannoccio Biringuccio discovered acetylene
1800 Sir Humphrey Davy invented the electric arc
1800s. Nikolai Slavyanov, C.L. Coffin developed metal

Страницы