In this paper, the research status of welding technology of magnesium alloy forgings is reviewed, and its future application prospect is discussed. The advantages and disadvantages of different welding methods are analyzed, the challenges in welding process are discussed, and the future development trend and application prospect are prospected.
Magnesium alloy forgings are widely used in many fields because of their light weight, high strength and good corrosion resistance. In order to better meet the needs of complex structures and connections, welding has become a key processing technology. However, magnesium alloy welding technology faces more challenges than traditional materials. Therefore, in-depth research on the welding technology of magnesium alloy forgings is of great significance to promote its wider application.
Common welding methods: including arc welding, laser welding, friction stir welding and so on. Among them, laser welding has the advantages of high precision and high energy density, and friction stir welding can realize the connection in solid state to avoid melting cracks and other problems.
Welded joint performance: The mechanical properties of welded joints are the key indicators to evaluate the quality of welding. The research shows that the strength and elongation of the joint can be improved by proper welding process parameters and post-welding treatment.
Welding defects and prevention measures: magnesium alloy is prone to porosity, cracks and other defects during welding. These defects can be effectively reduced by controlling the composition of the shielding gas, welding speed, and using appropriate preheating and post-welding heat treatment.
Although some progress has been made in the welding technology of magnesium alloy forgings, there are still many challenges. For example, the high chemical activity of magnesium alloys makes them vulnerable to oxidation and corrosion, posing a threat to the corrosion resistance of joints. In addition, the tendency of hot cracking in the welding process is large, and it is easy to produce hot cracks. Therefore, it is urgent to improve the welding process and joint performance.
With the continuous progress of science and technology, magnesium alloy forgings will be more and more widely used in aerospace, automobile manufacturing, electronic products and other fields. As a key component of the connection of the welding technology, its importance is self-evident. In the future, with the continuous innovation and improvement of welding technology, the application prospect of magnesium alloy forgings will be broader. For example, high-precision and high-efficiency welding methods will help to realize complex structure manufacturing of magnesium alloy forgings; At the same time, with the concept of sustainable development, magnesium alloy forgings as an environmentally friendly, recyclable material will be more widely used in the future.
The welding technology of magnesium alloy forgings is the key link to promote its wide application. Through in-depth research on welding methods, improving joint performance, overcoming welding defects, and technical innovation combined with practical application requirements, the welding technology of magnesium alloy forgings will continue to make breakthroughs, providing strong support for its application in various fields.
