Welding. In practice rightward

1.

2. WELDING

3.

4. a process which provides a non-detachable joining of two like metal pieces by heating them till melting condition

5. According to the movement of the torch, welding may be divided into rightward welding and leftward welding.

In practice rightward
In rightward
According
tomostly
the movement
welding is
used
welding the torch
moves ahead of the
additive
In leftward welding
the additive moves
in front of the torch
of the torch, welding may be
divided into rightward
welding and leftward
welding.

6. GAS WELDING

Gas welding is a
non-pressure process
using heat from a
gas flame
Gas welding may be
used for cutting
metals and repairing
agricultural machines
and implements.

7. In autogenous welding the source of heat is the gas flame obtained from a gas which is often acetylene.

8. Thermit welding is used in repairing rails, frames, etc.

9. Resistance welding is a process consisting of heating metals to be welded to their plastic temperature and then applying

mechanical pressure for
achieving a non-detachable joining

10. Butt welding may be applied for welding pipes, rods, etc.

11. Arc-welding

was invented in
1802 by the
famous Russian
scientist V.V.
Petrov
It is the most
important
welding process
for joining steels

12. Spot welding is used for welding parts of automobiles, refrigerators and airplanes