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Welding history

Classification of welding

Effect of welding speed

Welding defects

Types of welding joints

Welding position

Welding electrodes

Types of welding flame

Welding flux

Welding techniques

Welding symbol

Welding edge preparation

Advantages of welding joints

Thermal properties of metal

Welding safety

Types of welds

Brazing

Soldering

Cold Welding

Cold welding principle

The cold welding process is performed in solid state, where metal joint is produced in the room temperature and also under of mechanical pressure. The joint is made without of filler rod.

The main characteristic of this welding process is total absence of heat and flux.

A specially designed die is used for restricting or controlling the deformation of weld parts. The pressure is applied by manually or with power driven. The amount of pressure is applied on three factor-

1. Nature of surface area of die.

2. Thickness of the metal.

3. Characteristic of material.

Cold welding materials:


Cold welding process is most suitable for welding of non-ferrous metals.

Cold welding applications:



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Cold welding principle