Titanium material has the characteristics of high specific strength, corrosion resistance of sea water and ocean atmosphere, non-magnetic, sound permeability, impact resistance, and good processing plasticity. For marine materials, welding technology is an important processing method for structural manufacturing. The adaptability and welding performance of titanium alloys and titanium alloys are directly related to their applications in ship structures.

There are many types and brands of titanium materials, and different application fields have different performance requirements for titanium materials. The main application functions of marine titanium alloys are excellent seawater and marine atmospheric corrosion resistance, high specific strength, high strength and excellent processing properties. Because titanium is widely used in ship structures, propulsion systems, power systems, electronic information systems, auxiliary systems, special equipment and other fields, titanium alloy materials with various properties and specifications are required.

When welding marine titanium and titanium alloys, the principle of equal strength is usually followed to obtain the best combination of strength, plastic and synthesis. Therefore, when selecting welding materials:

① In general, use homogeneous welding materials;

②In order to improve the plasticity of the joint, a welding consumable with a slightly lower degree of alloying than the base metal can be used

③In order to improve the plasticity of the weld metal, the content of interstitial elements in the welding wire should be lower than that in the base metal. According to the regression analysis of the welding application research results and test data of titanium alloys for ships for many years, it is known that in order to obtain the strength of the weld metal and the base metal, the composition of the welding wire alloy is generally required to be 1 Al equivalent lower than the base metal.

In order to control the content of impurity elements in the metal of the welded metal to a certain level, the content of impurity elements inherent in the welding wire should be strictly controlled. For the best heat treatment effect, the heat treatment process should be determined according to the characteristics of different alloys.

Most marine titanium alloys have excellent welding properties. In the alloy application process, according to the characteristics of various alloys and the working conditions of the structure, the correct design of the joint form, the reasonable selection of welding materials, the development of a reasonable welding process, the provision of good and reliable gas protection in the welding high temperature zone and the correct use of stress relief measures are The key to ensure that the marine titanium alloy welded joints with excellent comprehensive performance are obtained.

Email: jasontitanium@163.com

Whatsapp/Skype/Wechat/Line: +86-15829508781