Application of stainless steel electrode and requirements of stud welding

We do not know much about stainless steel electrode, but it does not understand it, but it is used very frequently. Today we'll take a look at what matters needing attention in the use of stainless steel electrodes and know what requirements for welding studs. You must be very interested in these, come and look at it.

1. Chromium stainless steel has a certain corrosion resistance (oxidizing acid, cavitation), heat resistance and wear resistance. It is usually used in power plant, chemical, petroleum and other equipment and materials. The weldability of chromium stainless steel is poor. It should be paid attention to welding technology, heat treatment conditions and suitable welding strip.
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2, chromium 13 stainless steel after welding hardened, easy to produce cracks. If the same type of chromium stainless steel welding rod (G202, G207) welding, it must be more than 300 C preheating and 700 degrees after welding slow cooling treatment. If the weld can not be heat-treated after welding, the chromium nickel stainless steel electrode should be selected.

3, chromium 17 stainless steel, in order to improve corrosion resistance and energy storage stud welding soldering, appropriately increase the appropriate stability elements Ti, Nb, Mo and so on, and weldability is better than chrome 13 stainless steel. When the same type of chromium stainless steel electrode (G302, G307) is used, it should be preheated over 200 c and tempered at about 800 C after welding.

Stud on automobile welding has the following requirements: A, is the standard stud stud with special structure (M3 ~ M8); B, reliable welding in 0.7 ~ 1mm thick galvanized (15 ~ 25 m) on the steel plate automatic welding; C, high tempo, and has the quality of welding reproducibility; D, the host should be equipped with multiple output interface, so that feeding machine and welding torch, welding studs to achieve different diameters at different positions. The short - period arc stud welding machine and the arc - pull capacitor discharge stud welding can meet the requirements, so it has been widely used in the automobile industry. The strength of the former stud welding is higher than that of the latter.