Nowadays, there are too many ways of welding. What materials are welded and what welding methods are used, and different welding methods naturally have different functions. Then what are the welding methods of stainless steel? The welding methods commonly used include plasma arc welding, electric arc welding, submerged arc active welding, tungsten inert gas welding, and MIG welding.

1 plasma arc welding

Plasma arc welding is one of the most suitable methods for welding stainless steel. Because the plasma arc is a kind of contraction arc, the arc section is compressed smaller, the energy concentration, the temperature is high, it can again be sure the thickness range can be fully melted. However, because the equipment price is very expensive, the nozzle life is very short, so it is not widely used.

2, the method and principle of MIG welding

Metal inert gas welding welding of stainless steel is one of the most common way, MIG welding is divided into metal inert gas welding, MIG oxidation of mixed gas shielded welding, CO2 gas welding and gas welding flux cored wire.

Usually use inert gas argon, helium or their mixture as maintenance of gas welding area, because no wire surface coating layer, the current can be improved greatly, so the parent material for deep penetration, wire melting speed, high deposition rate, greatly improve the production efficiency.

Principle: to maintain the arc welding gas metal arc melting and welding wire is between arc welder as heat source to melt the wire and the base metal and weld zone to transport maintenance gas, the arc melting, welding, weld pool and near the base metal from the surrounding air damage. Successive feeding of wire metal continuously melting and transition to the molten pool, and melting of the base metal blends, forming weld metal, so that the workpiece connected to each other.

3, craft arc

Technical arc welding is a method of welding by means of electric arc welding. Technology of electric arc welding, the arc between the electrode and the workpiece electrode and workpiece heating to the melting condition, base metal electrode tip after melting droplet and molten blend together to form a pool, follow the arc moving forward, gradually cooling crystallization of molten pool liquid metal weld. Stainless steel technology arc welding, the most widely used, can be used for all types of stainless steel welding. The utility model is characterized in that the heat affected zone of the technical arc welding is smaller, the quality is easy to be ensured, the equipment is simple, the operation is sensitive, and the technical requirements of various welding directions and different thickness of plates are used. Today, stainless steel electrode is also able to satisfy the needs of various types of stainless steel welding, almost unlimited in the selection of electrode. The defect is produced in low power; poor labor conditions; for the welder's demand is higher, in many occasions, the welder must have appropriate qualifications; some of the information of the deposited metal welding has not yet reached the requirements, such as ultra high purity stainless steel; the workpiece thickness usually in the sheet below 1mm is not suitable for electric arc welding technology.

4, submerged arc welding is to weld the arc with a layer of granular flux

An arc welding method that does not expose the arc. The current is mainly used for thick plate welding of austenitic stainless steel, which is characterized by large welding current, deep penetration, the grooves can be smaller; welding speed, high power production; weld metal condensation slower, molten metal and molten solder has more time to reduce the possibility of metallurgical reaction, porosity in the weld; weld forming beautiful, good working environment, simple operation, the welder's demand is relatively simple. Defect is the welding heat input, the heat affected zone of the weld material arrangement should be particularly bulky; considering welding wire and flux welding range is only on cooperation; orientation; not direct investigation of relative orientation of arc and groove, must have active tracking equipment.

5, tungsten inert gas maintenance welding

Inert gas tungsten inert gas welding (TIG) can be divided into three categories: technical welding, semi active welding and active welding. TIG welding in TIG welding is suitable for use throughout stainless steel. It is used to welding in all directions, usually without spatter, and the welding seam is beautiful. The welding of thin parts is especially popular. When many thick parts are welded in groove, the gig is used as the base, which avoids the defects that the arc welding is easy to crack and the slag is difficult to clean. Inert gas can effectively block the air, it is insoluble in metal itself, not good metal reaction, can ensure the chemical composition of stainless steel needs. The defect is melting depth, deposition speed is small, production power is low, production cost is higher.

6, laser welding - stainless steel laser welding machine

Laser welding can be used for spot welding, butt welding, overlap welding, sealing welding and so on for thin wall materials and precision parts

Laser power is large, the weld has a high depth to width ratio, small heat affected areas, small deformation, fast welding speed.

The welds are of high quality, smooth and beautiful, without porosity, and the toughness of the material after welding is at least equivalent to that of the parent material

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Four dimensional ball screw table adopts imported servo control system, optional rotating table, can realize spot welding, linear welding, circumferential welding and other automatic welding,

The utility model has the advantages of wide application range, high accuracy and high speed.

Adjust any current waveform, can be set according to different materials of different waveforms, the welding parameters and welding requirements to match, in order to achieve the best effect of welding.

Used for laser welding between carbon steel, ordinary alloy steel, stainless steel, different steel, stainless steel - low carbon steel, 416 stainless steel, -310 stainless steel, 347 stainless steel, -HASTALLY nickel alloy, nickel