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What is Titanium Welding? What are the common welding methods?
What is Titanium Welding? What are the common welding methods?
A method by which a titanium workpiece is made atomically bound by heating or pressurizing, or a combination of both, with or without a filler material.
Titanium and titanium alloys commonly used welding methods are: melt welding, brazing, solid bonding, mechanical bonding, bonding, etc. Among them, melt welding is the most widely used, can be divided into: arc welding, electron beam welding, resistance welding and so on, the most used is the emotional gas (mainly hydrogen) protection welding, also known as hydrogen arc welding.
The weldability of titanium material depends on the chemical activity and physical properties of the material itself. At room temperature, the surface of titanium has a thin and dense oxide film, stable performance. With the increase of temperature, the activity of titanium increases sharply. When the welding temperature is higher than 600℃, the dense oxide film is destroyed, and the gas can diffuse into the metal through the loose oxide film, resulting in a violent chemical reaction with hydrogen, oxygen, nitrogen and other elements. The presence of these elements in titanium as interstitial impurities degrades the properties, especially the plasticity, of the welded joint. The presence of hydrogen is also often the cause of pores and cold cracks in welds.
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