Study On Weldability Of Magnesium & Aluminium Alloys And Design Of A Welding Wire Extrusion Unit

Non-ferrous metals consist of around 5 percent of the Earth's metal composition, though in a complementary position, they play a role that can hardly be replaced by iron and steels. In recent years, with the rapid development of manufacturing sector, aluminum & magnesium alloys are becoming more and more widely used in aerospace, electronics, communications, automotive, transportation and light industries. As a result, the difficulties incountered in welding these light metal have attracted much attention. At present, the most economical and practical method for welding such light metals is TIG welding (TIG).In this paper, weldability of non-ferrous light metals represented by in aluminum and magnesium alloys are discussed in terms of welding method, structure and welding process parameters such as welding current, welding speed, wire length and wire feed speed. And then by empirical experimental methods to determine the aluminum, magnesium alloy manual TIG welding the best welding process parameters. Through two sets of tests, a group of test manual TIG welding is used to import AZ61 wire and magnesium alloy AZ31 filled as scrap metal alloys, magnesium alloy AZ31 were on a flat but welding; The group is testing imports of 5183 and 5083 aluminum wire as scrap metal filling, were used on the 5083 TIG welded aluminum plate.Then microscope, SEM, tensile test, and other modern analytical methods, the analysis of filling wire welded joints microstructure of the Acer features and performance, through analysis of test results, the import of scrap wire and metal as a filler on the impact of welded joints .The research and analysis on the Weld received by using electric arc welding method show that its'organization and property are not only relate to the chemical of base metal composition but also to all the chemical constituents of welding materials because of the physical characteristic. In view that the kind of current welding materials of light alloy, especially magnesium alloy are very limited, and there are several problems include large investment, high cost, not easy for the development and application of laboratory and other shortcomings on the traditional wire production equipment. This paper designed a device which is used for laboratorial Development and application of magnesium, aluminum alloy wire hot extrusion. The devices include power system (motor), transmission (slider-crank mechanism), squeezing Execution System (extrusion device) and so on. The study focus on the design analysis of the core of extrusion device these are the extrusion die and container, make a deep research of calculation and choice about technical parameters, including the extrusion ingot billet size, compression ratio, the temperature extrusion, extrusion rate, squeeze lubrication, Wire length, squeezing pressure The device is not only suitable for hot extrusion deformation of the basic research, but also for the development of a new welding equipment.