Imports of aluminum and iron aluminum and stainless steel welding dissimilar anti-deformation temperature solder Q303B Foreword: A lot of people on the welding of aluminum and steel can not be with us asked welding, soldering if so, how welding? The answer is actually very bad answer, we can only say that in certain circumstances and some non-special needs situation can be welded! How do you say? If the structure is a tubular aluminum and steel, fully welded sockets do not deal with the problem in the future, but also for example if it is fillet or two plates overlap welding, in the case also can be welded tight fit, but if we say that two plates, an iron, a flat butt welding aluminum I need you? Then some degree of difficulty. Because we speak of welding aluminum and steel using Q303B solder at a soldering temperature of 400 ° working environment when, in the case of close-fitting solder reflects good capillary action, but after brazing brazing, such as on the overall performance in tensile and shear strength and welding is not able to be compared, so the flat butt welding of aluminum and steel, it is probably less than the shear force, of course, if it is Compare slab, then it is another matter (aluminum slabs and flat iron butt is possible through a dedicated welding equipment). We are speaking here of the steel pan is a concept that can refer to the popular saying of iron (wrought iron), can also refer to stainless steel. Welding method provides: Welding Engineer Wu Wei Ouding welding: low temperature brazing welding material: Q303B dissimilar aluminum and steel welding methods: 1) Thoroughly clean the surface, it is necessary to do the polishing 2) the welding with the close (10 about) 3) use all available heat source aluminum and steel is heated to 400 degrees Celsius, if it is particularly thin pieces, then recommend the use of a dedicated auxiliary WE53 porous gun, burning gas heating, heating the steel can be based, the temperature can be appropriately too high, but not low. 4) Try vertical angle wire welding wire in place, use a little WE53 special porous gun burn, and that is 1-2 seconds momentary thing, Q303B instantly melt molding 5) with a small brush to wipe WE53 special stainless steel surface residues, with water can be cleaned