How much do you know about welding materials? Don’t miss the super total! (II)

4. Aluminium alloy

As we all know, the thermal conductivity of aluminum alloys is quite high. Besides, aluminum alloys also have high reflectivity. Therefore, if laser welding is required for aluminum alloys, higher energy density is required. For example, common series 1 to 5 can be welded by laser. Of course, there are also some volatile components in the aluminum alloy, such as the galvanized sheet before, so it is inevitable that some steam will enter the weld during the welding process, thus forming some air holes. In addition, the viscosity of aluminum alloy is low, so we can improve this situation through joint design during welding.

5. Titanium/titanium alloy

Titanium alloy is also a common welding material. Using laser welding to weld titanium alloy can not only obtain high-quality welding joints, but also have better plasticity. As titanium material is relatively light and dark for the gap generated by gas, we should pay more attention to joint treatment and gas protection. During welding, attention should be paid to the control of hydrogen, which can effectively alleviate the delayed cracking phenomenon of titanium alloy in the welding process. Porosity is the most common problem of titanium materials and titanium alloys during welding. Here are some effective ways to eliminate porosity: first, argon with purity higher than 99.9% can be selected for welding. Secondly, it can be cleaned before welding. Finally, the welding specifications of titanium and titanium alloys should be strictly followed in the welding process. In this way, the generation of pores can be avoided to the greatest extent.

6. Copper

Many people may not know that copper is also a common material in welding. Copper materials generally include brass and red copper, which belong to high anti reflective materials. When selecting brass as welding material, pay attention to the zinc content in it. If the content is too high, the welding problem of galvanized sheet mentioned above will occur. In the case of red copper, attention should be paid to the energy density during welding. Only a higher energy density can satisfy the welding work of red copper.
This is the end of the inventory of common welding materials. We have introduced various common materials in detail, hoping to help you