Training in argon and electric welding of pipelines? 15

Argon arc welding priming, electrode arc welding CO2 cover surface, referred to as argon electric welding.

It is to pass argon shielding gas around the arc welding to isolate the air from the welding area and prevent oxidation in the welding area.

Argon arc welding technology is based on the principle of ordinary arc welding, the use of argon to protect the metal welding consumables, through high current to make the welding consumables melt into a liquid state on the welded substrate to form a molten pool, so that the welded metal and the welding consumables to achieve metallurgical combination of a welding technology, because of the continuous delivery of argon in the high temperature melt welding, so that the welding consumables can not contact with the oxygen in the air, thereby preventing the oxidation of the welding consumables, so that stainless steel, iron hardware metals can be welded.

Extended information: The working principle of argon arc welding in the main circuit, auxiliary power supply, drive circuit, protection circuit, etc. is the same as that of hand arc welding. I will not go into more detail here, but focus on the unique control function and arc starting circuit function of argon arc welding machine.

The reason why TIG welding can be so widely used is mainly because of the following advantages.

1. Argon protection can isolate the adverse effects of oxygen, nitrogen, hydrogen and other gases in the air on the arc and molten pool, reduce the burning loss of alloying elements, and obtain dense, spatter-free and high-quality welded joints;

2. The arc of argon arc welding is stable, the heat is concentrated, the arc column temperature is high, the welding production efficiency is high, the heat affected zone is narrow, and the weldment stress, deformation and crack tendency of the weldment are small;

3. Argon arc welding is open arc welding, which is convenient for operation and observation;

4. The electrode loss is small, the arc length is easy to maintain, and there is no flux and coating layer during welding, so it is easy to realize mechanization and automation;

5. TIG welding can weld almost all metals, especially some refractory metals and easily oxidized metals, such as magnesium, titanium, molybdenum, zirconium, aluminum, etc. and their alloys;

6. It is not limited by the position of the weldment, and can be welded in all positions.

To learn argon, we must go to the training base to investigate, and consider the faculty, scale, environment, internship volume, employment and so on.

According to the needs of the domestic and international markets, there are 8 categories of intermediate and senior welder training courses: 1. Argon arc welding; 2. Ordinary welder; 3. Special welder gas welding, 4. Resistance welder, welding; 5. Advanced pipeline welding training course for pressure vessel welding 6, high-pressure welder training 7, argon electric welding training 8, downward welding training.

This must be trained, this belongs to a special type of work.

Shanghai Wantong Welding Training Company has argon arc welding training. The company has been focusing on welding training for 34 years, and has accumulated rich experience in running schools. The school has a professional welding training area to provide students with advanced training equipment.

The whole process of practical training and actual combat drills has cultivated a large number of practical talents for the society over the years. In the co-construction of training courses, training practice bases and other cooperation projects, based on the real welding job employment needs of enterprises, and the development of practical and learning synchronous teaching methods and talent training mode, so that students can learn professional skills during school.

Salary Development:Welding is widely used in aviation, nuclear industry, shipbuilding, construction and machinery manufacturing and other industrial sectors, in China's economic development, welding technology is a kind of indispensable processing means, but the current training of welding professionals is far from meeting the needs of the society. In particular, there is an extreme shortage of talents in the fields of second guarantee welding, argon arc welding, and manual arc welding technology, which has created a large demand for welding skills, urgent demand, and high salary.

Ordinary professional welding talents, the monthly salary can reach 6,000 to 15,000 yuan, and the special welding industry is even as high as tens of thousands of yuan. This kind of personnel does not need to have a high degree of education, as long as they have the spirit of being practical and capable, hard-working, and learning technology, they can be employed without worry. It is suitable for aspiring young people, laid-off workers, and veterans who want to master welding technology.

1. Welding example: the material for economizer, evaporation section pipe bundle, water wall and low-temperature superheater is 20 steel, and the high-temperature superheater tube is 12cr1mov.

2. Preparation before welding: Before welding, the nozzle should be beveled at 30°, and the metal color should be polished within 15mm inside and outside the pipe end. The pipe to the mouth clearance is 1 3mm.

When the actual counterpart gap is too large, the transition layer needs to be surfacing on the bevel side of the pipeline. Set up temporary shelter facilities to strictly control the wind speed at the welding operation, because the wind speed exceeds a certain range, it is easy to produce pores.

3. Operation: WST315 manual tungsten argon arc welding machine is used, and the welding machine itself is equipped with a high-frequency arc striking device, which can be used for high-frequency arc extraction. Arc extinguishing is different from electrode arc welding, if the arc is extinguished too quickly, it is easy to produce arc pit cracks, so the weld pool should be led to the edge or thicker part of the base metal during operation, and then gradually shrink the molten pool and slowly extinguish the arc, and finally close the shielding gas.

For No. 20 steel pipe with a wall thickness of 3 4 mm, the filling material can be TIGJ50 (for 12Cr1 MoV, 08CrMoV), the diameter of the tungsten rod is 2mm, the welding current is 75 100A, the arc voltage is 12 14V, the shielding gas flow rate is 8 10L min, and the power supply type is DC positive connection.

Hello, dear, I'm glad to answer for you: can argon arc welding be full argon welding pipes Answer, pro: Yes, there is no problem, it is completely possible.

Processing single-sided 15° groove, reserving gaps, and bottom-facing welding single-sided welding double-sided forming, which can be filled and covered. Tungsten argon arc welding can weld ordinary seamless steel pipes. The thickness of the seamless steel pipe is large, and the tungsten argon arc welding of open groove welding is suitable for root welding, and then flux-cored gas shielded welding or electrode hand arc welding fills the cover surface welding.

The thickness is small, and it can be directly welded with tungsten argon arc welding. Thank you for your patience. The above is my full reply, if you are satisfied with my service, please give a thumbs up, and I wish you all the best!

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Summary. 1.Argon is a welding method that uses argon arc welding to weld the bottom of the weld and then uses arc welding to weld the cover surface.

2.When welding, the angle and position of each welding zone are determined for the circumferential butt weld of the pipe, and the parameters of each zone are determined.

3.Such as preheating temperature, welding temperature, current, welding pulse, argon flow, etc., it combines the advantages of the two welding methods, and can better ensure the quality of the project.

What is the difference between argon and high-pressure pipe welding?

1.Argon is a welding method that uses argon arc welding to weld the bottom of the weld, and then answers the old welding method of arc welding cover. 2.

When welding, the angle and position of each welding zone are determined for the circumferential butt weld of the pipe, and the parameters of each zone are determined. 3.Such as preheating temperature, liquid lifting temperature, current, welding pulse, argon flow, etc., it combines the advantages of the two welding methods, and can better ensure the quality of the project.

There is no executive welding.

High-pressure welding? Without this method, you should be talking about TIG welding. Special materials such as stainless steel and aluminum can be welded.

When you come, you have to be skilled.

When I used to do management, when I watched the master master burn the argon arc, I had a few experiences: 1When the pipe is docked, it is required to have a proper void, mainly depending on the thickness of the pipe wall, which is generally 1-2mm.

2.When welding, the current and voltage must be adjusted, which is another critical step in welding the argon arc, (hehe, this is also nonsense, as long as the welding workers know more, the size of the current is mainly personal experience, and there will be a feeling if you weld more.) ）

3.In the case of high welding requirements, no matter how good it is, the pipe is also filled with argon, so that the welding will be more beautiful and smooth on both sides.

I hope it helps you.