Argon welding technology - a classic element that is inseparable from bicycles

The principles of brazing and soldering are roughly similar. That is, when two pieces of welding metal do not fuse with each other, they are joined together by the indirect joining of a third metal. However, the melting temperature of brazing is higher than Fahrenheit. Those with temperatures above 800 degrees (belonging to the scope of brazing).

LUG technology
Argon welding (direct welding), as far as the research and development of welding is concerned, if the air and molten pool can be separated and isolated during welding, the quality of the chemical and physical properties of the welding can be improved to be more ideal and perfect; there are many It has the function of blocking air from oxidizing the weld bead, and the air also has the ability to repel dust and impurities.

We often see people holding a fairy wand and wearing a mask in factories. That is called DC or AC arc welding. Welding rods are divided into bare welding rods, thin-coated welding rods, and thick-coated welding rods according to their manufacturing categories. Coating refers to flux. The function of welding rod coating (flux) is not only to stabilize the arc, but also to generate gas in the molten pool to protect the molten pool. In argon welding, the inert gas is external and the electrodes are non-consumable. Note: Inert gas accounts for approximately 92% of the cost of argon welding.

Inert gas, also known as inert gas, refers to a gas that does not spontaneously ignite, does not support combustion, and does not undergo any chemical changes, such as argon and helium. When an arc is generated, this gas immediately cooperates with arc welding to output a continuous gas to surround the arc and molten pool, which isolates the arc from the air to prevent oxidation and improves the quality of the weld bead. This welding step method is called " Gas tungsten arc welding process. According to the standard English code of AWS American Welding Society, the English abbreviation is GTAW, but it is commonly known as TIG (tungsten inert gas) or the Chinese temporary translation name is argon gas welding, etc.

PS, when talking about the previous welding of the titanium alloy frame with shelf holes, the welding master said that it must be sent back to the titanium factory for processing, because the pipe must be filled with inert gas to avoid oxidation, etc., which echoes this paragraph!

The reason why argon welding technology is generally popular is that it has many advantages: using argon welding technology to assemble the frame can eliminate the need for joint preparation, thus shortening the time required for the manufacturing process and reducing manufacturing costs (a good LUG is very easy to use). Expensive (see www.bikelugs.com, one or a set costs more than 50 US dollars), especially when manufacturing customized frames; Furthermore, without the weight of the LUG itself and the weight of the pouring welding material, argon Compared with the copper welding adopted by LUG, it has the capital of "lightweight" that modern people generally pursue.

However, argon welding technology also has some disadvantages. First, the temperature generated is very high. Because the base metal must melt at the weld bead, the argon welding temperature will be relatively high. The mechanical properties are related to heat treatment. Generally speaking, the mechanical strength of argon welding is higher. However, because the heated pipe area is relatively small, this will reduce the mechanical function of the welded part of the pipe. Generally speaking, argon welding is more brittle than copper welding, and the joints are easier to break.