What Are the Differences Between a MIG and TIG Welder?

MIG welding (melt extremely inert gas shielded welding) English: Melt inert-gas welding uses a melting electrode, an external gas as an arc medium, and protects metal droplets, welding pools, and high-temperature metals in the welding zone. Arc welding is called melting. Gas shielded arc welding. The inert gas (Ar or He) shielded arc welding method using solid cored wire is called melting extremely inert gas shielded welding, referred to as MIG welding.

Pulse MIG welding is a MIG welding method that uses pulsed current instead of the usual pulsating DC.

Due to the use of pulsed current, the arc of pulsed MIG welding is pulsed, compared to the usual continuous current (pulsed DC) welding:

Wide adjustment range of welding parameters;

If the average current is less than the lower critical current I0 of the injection transition, as long as the pulse

Unlike TIG welding, MIG (MAG) welding uses a fusible welding wire as an electrode, and uses the arc burning between the continuously fed wire and the workpiece to be welded as a heat source to melt the wire and the base metal. During the welding process, the protective gas-argon is continuously transported to the welding area through the nozzle of the welding gun, so that the arc, the molten pool and the nearby base metal are protected from the harmful effects of the surrounding air. The continuous melting of the welding wire should be transferred to the weld pool in the form of droplets, and after fusion and condensation with the molten base metal, the weld metal is formed.

GMT-SKD11> 0.5 ~ 3.2mm HRC 56 ~ 58 Welding cold work steel, metal stamping dies, cutting dies, tools, forming dies, and hard surfaces of workpieces to produce argon electrodes with high hardness, wear resistance and high toughness, welding Warm up and warm up before replenishing, otherwise cracking may occur.

GMT-63 degree edge welding wire> 0.5 ~ 3.2mm HRC 63 ~ 55, mainly used for welding broach die, hot work high hardness tool die, hot forging master die, hot die, screw die, wear-resistant hard surface , High speed steel, knife edge repair.

GMT-SKD61> 0.5 ~ 3.2mm HRC 40 ~ 43 Welding zinc, aluminum die-casting mold, good heat resistance and crack resistance, hot gas die, aluminum-copper hot forging mold, aluminum-copper die-casting mold, good resistance Heat, abrasion and crack resistance. Generally, hot die casting molds often have tortoise shell cracks, most of which are caused by thermal stress, and also caused by surface oxidation or corrosion of die casting raw materials. Heat treatment is adjusted to an appropriate hardness to improve its life, and the hardness is too low or too high. Be applicable.

GMT-hs221 tin brass wire. Performance characteristics: HS221 wire is a special brass wire containing a small amount of tin and silicon. It is used for gas welding and carbon arc welding of brass. It is also widely used for brazing copper, steel, copper-nickel alloy, etc. Suitable welding methods for copper and copper alloy wire are argon arc welding, oxygen-acetylene welding and carbon arc welding.

GMT-hs211 has good mechanical properties. For argon arc welding of copper alloys and MIG brazing of steels.

GMT-hs201, HS212, HS213, HS214, HS215, HS222, HS225 copper wire.

GMT- 1100, 1050, 1070, 1080 pure aluminum welding wire. Performance characteristics: Pure aluminum welding wire for MIG and TIG welding. This kind of welding wire has good color matching after anodizing. Suitable for power applications, good corrosion resistance and excellent continuity. Uses: Ship Sports Equipment Electricity

GMT-semi-nickel, pure nickel wire electrode

GMT-4043, 4047 aluminum silicon welding wire. Performance characteristics: Used for welding 6 *** series base materials. Weakly sensitive to hot cracks and used to weld forged and cast materials. Uses: ships, locomotives, chemicals, food, sports equipment, molds, furniture, containers, containers, etc.

GMT- 5356, 5183, 5554, 5556, 5A06 aluminum-magnesium welding wire. Performance characteristics: This type of welding wire is specially designed for welding 5 *** series alloys and filler alloys whose chemical composition is close to the base metal. It has good corrosion resistance and color compatibility after anodizing. Uses: used in sports equipment such as bicycles, aluminum scooters, locomotive compartments, chemical pressure vessels, military production, shipbuilding, aviation, etc.

GMT-70N> 0.1 ~ 4.0mm welding wire characteristics and uses: joining of high hardness steels, cracking of zinc and aluminum die casting molds, welding and reconstruction, pig iron / cast iron welding repair. It can directly overlay various cast iron / pig iron materials, and also can be used for welding of mold cracks. When using cast iron welding, try to keep the current as low as possible, use short-distance arc welding, and preheat the steel partly. It heats and cools slowly.

GMT-60E> 0.5 ~ 4.0mm Features and uses: Special welding of high tensile steel, bonding of hard surface, cracking welding. High-strength welding wire, containing high content of nickel-chromium alloy, is professionally used for anti-cracking bottom welding, filling and priming, strong tensile force, and can repair cracks in steel after welding. Tensile strength: 760 N / mm & sup2; Ting elongation: 26%

GMT-8407-H13> 0.5 ~ 3.2mm HRC 43 ~ 46 Zinc, aluminum, tin and other non-ferrous alloys and copper alloy die-casting dies, can be used as hot forging or stamping dies. With high toughness, abrasion resistance and thermal erosion resistance, high temperature softening resistance, good high temperature fatigue resistance, can be used for heat treatment of punches, reamer, rolling knife, grooving knife, scissors ... When it is necessary to prevent decarburization, the hardness of the hot tool steel after welding is too high and cracks will occur.

GMT-Explosion-proof cracking welding wire> 0.5 ~ 2.4mm HB ~ 300 Bonding of high-hardness steel, making of hard surface, cracking welding. High-strength welded branch with high content of nickel-chromium alloy. It is used for anti-cracking bottom welding, filling and priming, strong tensile force, and can repair crack welding and reconstruction of steel.

GMT-718> 0.5 ~ 3.2mm HRC 28 ~ 30 Large household appliances, toys, communications, electronics, sports equipment and other plastic product mold steel. Plastic injection mold, heat-resistant mold, anti-corrosion mold, good machinability, erosion resistance, excellent surface gloss after grinding, and long service life. The preheating temperature is 250 ~ 300 , and the hot temperature is 400 ~ 500 . When multi-layer welding is used, the welding method of backward method is used, which is less likely to cause poor fusion and other defects.

GMT-738> 0.5 ~ 3.2mm HRC 32 ~ 35 Plastic mold steel for translucent and surface gloss, large mold, plastic mold steel with complex shape and high precision. Plastic injection mold, heat-resistant mold, anti-corrosion mold, good etch resistance, excellent processing performance, easy cutting and polishing and electrical corrosion, good toughness and wear resistance. The preheating temperature is 250 ~ 300 , and the hot temperature is 400 ~ 500 . When multi-layer welding is used, the welding method of backward method is used, which is less likely to cause poor fusion and other defects.

GMT-P20Ni> 0.5 ~ 3.2mm HRC 30 ~ 34 Plastic injection mold, heat-resistant mold (cast copper mold). Designed with alloy components with low welding cracking sensitivity, containing about 1% nickel, suitable for PA, POM, PS, PE, PP, ABS plastics, with good polishing properties, no pores and cracks after welding, and good after grinding The finish is vacuum degassed. After forging, it is pre-hardened to 33 degrees HRC, the hardness of the cross-section is uniform, and the life of the mold is more than 300,000. The preheating temperature is 250 ~ 300 , and the hot temperature is 400 ~ 500 . When multi-layer welding is used, the welding method of backward method is used, which is less likely to cause poor fusion and other defects.

GMT-NAK80> 0.5 ~ 3.2mm HRC 38 ~ 42 Plastic injection mold, mirror steel. High hardness, excellent mirror effect, good discharge processability, excellent welding performance. After grinding, it is as smooth as a mirror. It is the most advanced and best mold steel in the world. With the addition of free-cutting elements, it is easy to cut and has high strength, toughness and resistance. Grinding without deformation, suitable for mold steel of various transparent plastic products. The preheating temperature is 300 ~ 400 , and the hot temperature is 450 ~ 550 . When used for multi-layer welding, the welding method using the back-up method is less likely to cause defects such as poor fusion.

GMT-S136> 0.5 ~ 1.6mm HB ~ 400 plastic injection mold, good corrosion resistance and permeability. High purity, high mirror degree, good polishing, excellent rust and acid resistance, few heat treatment variations, suitable for PVC, PP, EP, PC, PMMA plastics, corrosion-resistant and easy-to-process modules and fixtures, super mirror-resistant Precision molds, such as rubber molds, camera parts, lenses, watch cases, etc.

GMT- King brand steel> 0.5 ~ 2.4mm HB ~ 200 iron mold, shoe mold, soft steel welding, easy to engraved corrosion, S45C, S55C steel and other repairs. The texture is fine, soft, easy to process, and there will be no pores. The preheating temperature is 200 ~ 250 , and the hot temperature is 350 ~ 450 .

GMT-BeCu (Beryllium Copper)> 0.5 ~ 2.4mm HB ~ 300 Copper alloy mold material with high thermal conductivity, the main additive element is beryllium, which is suitable for the inner inserts, cores, die-casting punches, heat flow of plastic injection molding molds. Cooling system, thermal nozzle, integral cavity of blow mold, wear plate, etc. Tungsten copper materials are used in resistance welding, electrical sparks, electronic packaging, and precision mechanical equipment.

GMT-CU (argon-welded copper)> 0.5 ~ 2.4mm HB ~ 200 This welding support is widely used, and can be used to repair the electrolytic chip, copper alloy, steel, bronze, pig iron, and general copper parts. Good mechanical properties, can be used for copper alloy welding repair, but also used for welding steel and pig iron, iron joints.

GMT-oil steel welding wire> 0.5 ~ 3.2mm HRC 52 ~ 57 Punching die, gauge, drawing die, perforated punch, can be widely used in hardware cold stamping, hand decoration embossing die, general special tool steel, wear-resistant ,Oil cooler.

GMT-Cr steel welding wire> 0.5 ~ 3.2mm HRC 55 ~ 57 punching die, cold forming die, cold drawing die, punch, high hardness, high ductility, good wire cutting. Warm up and warm up before welding, please do post-heating after welding.

GMT-MA-1G> 1.6 ~ 2.4mm, ultra-mirror welding wire, mainly used in military products or extremely demanding products. Hardness HRC 48 ~ 50 Maraging steel, aluminum die-casting die, low-pressure casting die, forging die, blanking die, injection molding die. Special hardened high-toughness alloy, very suitable for aluminum gravity die-casting molds, gates, and prolonged service life by 2 ~ 3 times. It can make very precise molds and super-mirror surfaces (gate repair welding, not easy to use thermal fatigue crack)

GMT-high speed steel welding wire (SKH9)> 1.2 ~ 1.6mm HRC 61 ~ 63 high speed steel, 1.5 ~ 3 times the durability of ordinary high speed steel, suitable for manufacturing and processing high temperature alloy, stainless steel, titanium alloy, high strength steel, etc. Tools for processing materials, welding repair broaches, hot work high hardness tools, dies, hot forging master dies, hot stamping dies, screw dies, wear-resistant hard surfaces, high speed steel, punches, knives, electronic parts, thread rolling dies , Dental plate, drilling roller, rolling die, compressor blade and various mold mechanical parts, etc ... After strict quality control in European industrial standards, high carbon content, excellent internal materials, uniform internal organization, stable hardness, wear resistance, toughness, high temperature resistance, etc ... The characteristics are better than ordinary materials of the same grade.

GMT-Nitrided Parts Welding Wire> 0.8 ~ 2.4mm HB ~ 300 Suitable for nitriding molds and parts surface repair.

Aluminum welding wire, mainly 1 series pure aluminum, 3 series aluminum silicon and 5 series i welding wire, diameter 1.2mm, 1.4mm, 1.6mm, 2.0mm.

MIG welding occupational disease

The hazard of argon arc welding is relatively greater than that of general electric welding. It can generate harmful gases and metal dust such as ultraviolet, infrared radiation, ozone, carbon dioxide, carbon monoxide, and can cause a variety of occupational diseases: 1) Pneumoconiosis of the welder: long-term inhalation High concentration of welding soot can cause chronic lung tissue fibrosis, leading to pneumoconiosis of the welder, with an average working age of 20 years. 2) Manganese poisoning: neurasthenia syndrome, autonomic dysfunction, etc .; 3) Electro-optic ophthalmia: foreign body sensation in the eye, burning, severe pain, photophobia, tearing, eyelid spasm, etc.

MIG welding protection measures

In order to protect the eyes from arc light, a mask with special protective lenses must be used during welding. In order to prevent arc burns to the skin, the welder must wear work clothes, gloves and shoe covers. (3) In order to protect welding work and other production personnel from arc radiation, a shield can be used. Occupational health check-ups are conducted annually.