1.2mm-3.2mm TIG Welding Wire technology needs to be met
Since 1.2 mm to 3.2 mm, TIG welding wire sizes according to 1.2mm-3.2mm TIG Welding Wire welding the unique place, as far as possible reduce the amount of heat input, the manual electric arc welding, argon arc welding is adopted two kinds of methods, d > Φ 159 mm adopts argon arc welding, manual arc welding covering. D ≦ Φ 159 mm all use argon arc welding. 1.2mm-3.2mm TIG Welding Wire technology needs to meet the conditions.
The welding machine adopts dc inverse when manual arc welding, and dc is used when argon arc welding.
Before welding, the wire should be brushed with stainless steel wire to remove the oxidation skin of the surface and wash with acetone. 1.2mm-3.2mm TIG Welding Wire should be in 200-250 ℃ drying 1 h, as you take;
Before welding, clean the oil on both sides of the slope of the workpiece by 25 mm on both sides of the workpiece.
(4) argon arc welding, the nozzle Φ 2 mm in diameter, extremely rich tungsten tungsten electrode, specifications Φ 2.5 mm;
When the argon arc welding stainless steel, the back must be protected by argon gas to guarantee the back forming. The flow rate is 5-14l/min, and the positive argon flow rate is 1213l/min.
The seam thickness should be as thin as possible at the bottom of the bottom welding, and the weld with the root will be excellent. If the arc is in a gentle slope, if there is a shrinkage cavity, the grinding machine will be worn out. The arc must be filled in the groove and the arc crater should be filled to prevent the cracks.
Because the 1.2mm-3.2mm TIG Welding Wire for austenitic stainless steel pipe, in order to prevent the carbide precipitation sensitization and intergranular decay, should strictly control the interpass temperature and cooling rate after welding, the welding interlayer temperature control under 60 ℃, must immediately after welding water-cooled, by subsection welding at the same time. This symmetrical dispersion welding sequence can increase the cooling rate of the joints and reduce the welding stress.
1.2mm-3.2mm TIG Welding Wire is the pipe fitting that will weld the stainless steel tube and pipe fitting to the seam of argon arc welding.
According to the welding part of the edge of the welding wire, the welding parts can be divided into two parts: the edge extension, the edge extension, and the non-yanbian three kinds of 1.2mm-3.2mm TIG Welding Wire. The welding specifications of the socket welding are usually dn15-dn100.
1.2mm - 3.2 mm TIG wire is the most reliable way to connect the pipe fitting of the pipe fitting, and then the pipe fitting of argon arc welding on the edge of the pipe piece. Inner diameter of pipe fittings = pipe diameter. Butt welding is generally used for welding of stainless steel piping systems with larger specifications.
1.2 mm - 3.2 mm TIG wire is used more and more widely, whether it is life or production, so it is necessary to know more about him. This paper discusses the commonly used welding method of 1.2mm-3.2mm TIG Welding Wire.
First, manual welding. Manual welding is a very common and commonly used welding method which is easy to operate and easy to use. The length of the arc can rely on the operator manually to make reasonable adjustment, the adjustment is according to the requirement of 1.2mm-3.2mm TIG Welding Wire and the gaps between the welding of the workpiece, according to the size of the gap by adjusting the length of the arc. 1.2 mm - 3.2 mm TIG wire can not only be used as a tool for welding stainless steel, but also can be used as an effective filling material for welding seams under certain circumstances. And this kind of material, can better connect stainless steel work piece, achieve better compatibility.
Secondly, metal gas shielded welding. Metal gas shielded welding is an automatic gas shielded arc welding. In the process of using this method, the arc is welding between the welding wire and the stainless steel workpiece under the protection of the gas constraint. The welding wire of mechanical welding equipment is 1.2mm-3.2mm TIG Welding Wire, which is melted into liquid stainless steel by arc. In view of the generality and particularity of MAG welding, it is the most widely used welding method in today's stainless steel welding industry. And, because of its many advantages, it must be a widely used welding method for a long time.
Again, tungsten inert gas shielded welding. In this kind of method of use, stable electric arc generated in 1.2mm-3.2mm TIG Welding Wire and stainless steel material artifacts, the welding protective gas for argon, adopted by the automatic welding equipment into the wire itself is not charged. Wire can also be manually send, but there is a certain risk. Under certain conditions, it is not necessary to feed the wire. The stainless steel material that needs to be welded determines whether the direct current is used. If direct current is used, 1.2mm-3.2mm TIG Welding Wire must be set to negative, because it is very strong in soldering, and has good welding effect for all kinds of stainless steel.