What does argon arc welding mean?

Question 1: What does full argon arc welding mean? Hello, full argon arc welding means that the entire weld is welded by argon arc welding. It is different from, for example, argon arc welding primer and other welding methods. Noodles and the like.

Hope it will be adopted, thank you.

Question 2: What is argon arc welding? Chinese name: argon arc welding English name: argon arc weld; argon shielded arc welding Definition 1: The collective name for tungsten arc argon shielded welding and melting arc argon shielded welding . The former is an arc welding that uses a thoriated tungsten or cerium tungsten rod as the electrode and argon gas as the shielding gas; the latter is an arc welding that uses a welding bend as the melting electrode and argon gas as the shielding gas. Applied disciplines: Electric power (first-level discipline); Thermal automation, power plant chemistry and metals (second-level discipline) Definition 2: Gas shielded welding using argon as a shielding gas. Applied disciplines: mechanical engineering (first-level discipline); welding and cutting (second-level discipline); fusion welding (third-level discipline)

Question 3: What does the arc in argon arc welding mean? Arc is electric arc, you can understand it as fire. Arc starting and arc closing can be understood as ignition and flameout. What controls the arc starting current and arc closing current can be understood as ignition temperature and flameout temperature. During the household connection process, argon gas is generated. It protects the welding surface from oxidation.

Question 4: What is the difference between shielded welding and argon arc welding? Shielded welding uses inert gas or flame-retardant gas to surround the welding area to prevent it from reacting with oxygen in the air during welding to achieve an anti-oxidation effect (it’s just not that easy, but it will still rust.) It is mainly used to weld cold, Hot plate. Argon arc welding uses tungsten alloy as a medium to weld sheet metal made of materials such as stainless steel and aluminum (difference between AC and DC). It is necessary to wear all the equipment when operating argon arc welding, otherwise people will feel very tired after welding for more than 4 hours.

Question 5: What is argon arc welding? argon arc welding? argon gas shielded welding. It is to pass the argon arc protective gas around the arc welding to isolate the air from the welding area and prevent the oxidation of the welding area.

According to different electrodes, argon arc welding is divided into two types: melting electrode argon arc welding and non-melting electrode argon arc welding.

1. The working principle and characteristics of non-melting electrode argon arc welding

Non-melting electrode argon arc welding is an arc burning between a non-melting electrode (usually a tungsten electrode) and the workpiece, and a kind of fluid flows around the welding arc. An inert gas (often argon) that does not react chemically with the metal forms a protective gas shield so that the tungsten terminal, arc and molten pool and the metal that is already at high temperature are not in contact with the air, and can prevent oxidation and absorption of harmful gases. This results in a dense welded joint with very good mechanical properties.

2. The working principle and characteristics of argon arc welding

The welding wire is fed through the wire wheel, and the conductive nozzle conducts electricity, generating an arc between the base metal and the welding wire, melting the welding wire and the base metal, and using the inert gas argon Protect the arc and molten metal for welding. The difference between it and tungsten arc welding: one is a welding wire used as an electrode, which is continuously melted and filled into the molten pool, and condensed to form a weld; the other is a shielding gas. With the technical application of tungsten arc welding, the shielding gas From a single argon gas, a variety of mixed gases have been widely used, such as Ar 80% + CO220% argon-rich protective gas. Usually the former is called MIG and the latter is called MAG. Judging from its operation mode, the most widely used ones at present are semi-automatic argon arc welding and argon-rich mixed gas shielded welding, followed by automatic argon arc welding.

Compared with tungsten arc welding, melting arc welding has the following characteristics.

(1) High efficiency because it has high current density, concentrated heat, high deposition rate and fast welding speed. In addition, it is easy to strike an arc.

(2) Protection needs to be strengthened. Because the arc light is strong and the smoke is large, protection must be strengthened.

3. Protective gas

(1) The most commonly used inert gas is argon.

It is a five-color, odorless gas with a content of 0.935% in air (calculated by volume). The boiling point of argon is -186°C, which is between the boiling points of oxygen and helium. Argon is a by-product when oxygen plants fractionate liquid air to produce oxygen.

Bottled argon is used for welding in my country. At room temperature, its filling pressure is 15MPa. The cylinder is painted gray and marked "Argon". The chemical composition requirements of pure argon are: Ar ≥ 99.99%; He ≤ 0.01%; O2 ≤ 0.0015%; H2 ≤ 0.0005%; total carbon content ≤ 0.001%; ??moisture ≤ 30mg/m3 .

Argon is an ideal protective gas, which is 25% denser than air. It is helpful for protecting the welding arc during flat welding and reduces the consumption of protective gas. Argon is a gas with very inactive chemical properties. It does not react chemically with metals even at high temperatures, so there is no oxidation and burning loss of alloy elements and a series of problems caused by it. Argon is also insoluble in liquid metal and will not cause porosity. Argon is a monatomic gas that exists in an atomic state and has no molecular decomposition or atomic endothermy at high temperatures. The specific heat capacity and heat conductivity of argon are small, that is, the amount of argon absorbed is small and the heat transfer to the outside is small. The heat in the arc is not easily lost, making the welding arc combustion stable and concentrating the heat, which is beneficial to the welding process.

The disadvantage of argon is its higher ionization potential. When the arc space is filled with argon gas, it is more difficult to ignite the arc, but once the arc is ignited, it is very stable.

4. Disadvantages of argon arc welding: (1) Due to the large heat-affected zone of argon arc welding, the workpiece often causes deformation, reduced hardness, blisters, local annealing, cracking, pinholes, and wear after repair , scratches, undercuts, or insufficient bonding force and internal stress damage. Especially in the repair process of precision castings, small defects are highlighted on the surface. In the field of repairing defects in precision castings, cold welding machines can be used to replace argon arc welding. Since the cold welding machine releases less heat, it can better overcome the shortcomings of argon arc welding and make up for the difficulty of repairing precision castings.

Question 6: What do the words TIG and ordinary welding on my argon arc welding machine mean? The WS series welding machine is a TIG?MMA dual-purpose welding machine.

TIG: Tungsten arc welding. Suitable for welding of non-ferrous metals, thinner low carbon steel, low alloy steel, alloy steel, bottom welding of pipelines and pressure vessels.

Ordinary welding refers to: MMA welding. That is: electrode hand arc welding. An arc welding process that uses a welding rod as a melting electrode to melt and fill the weld to form a weld.

Question 7: What does 4k argon arc welder mean? It means the salary is 4,000, right?

Question 8: What do argon arc welding and carbon arc welding mean? Argon arc welding: short for argon shielded arc welding. It is divided into two categories: TIG tungsten arc welding and MIG melting arc welding.

TIG tungsten arc welding is divided into: AC tungsten arc welding (positive Xuan wave; square wave), AC pulse tungsten arc welding,

DC tungsten arc welding Argon arc welding (forward connection; reverse polarity), DC pulse tungsten arc welding.

MIG argon arc welding includes: ordinary constant current MIG argon arc welding, single pulse MIG argon arc welding, and double pulse MIG argon arc welding. Each type of MIG welding also includes: 100 argon shielding; argon and helium mixed gas shielded welding.

Carbon arc welding: Based on manual arc welding with ordinary electrodes, use welding clamps to hold carbon rods (carbon arc gas is best), instead of electrodes for welding copper wires (the welding process of other metals is easier Weld carburization) uses the arc heat generated by the carbon rod to melt the copper wire joints to achieve the welding effect. Submersible pump repair shops are often used to weld copper cable interfaces. After welding, they are wrapped with waterproof tape and wrapped with PVC tape on the outside.

Question 9: What does argon arc welding film mean? If you have done argon arc welding for more than 5 years, can you understand what film means at a glance? I want to know first. The welding yield limit includes cracks, pores, lack of fusion, etc.