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11 Questions on Welding Methods for Tailor Welding of Stainless Steel Plates

2019-05-30

Question 1:6 mm of 316L stainless steel sheet tailor-welded with what welding method

Answer: Manual argon arc welding (MTIG) or CO2 welding method and manual electrode welding can be used.

Manual argon arc welding: ER316L welding wire, 2.5 or 3.2 thick, can be used; for 6 mm thick plate, X groove can be used, welding deformation should be paid attention to when tailoring, can be one front, one back, as far as possible to offset the impact of welding deformation;CO2 welding method: If we want to get better results, flux cored wire (E316LT) can be used for tailor welding. The reason for selecting flux cores is that the spatter is very small, the protection effect of welding seam is good, but the price is expensive. During operation, attention should be paid to the operation of clearing roots between layers. The coating must be removed before the next welding.Manual electrode welding: Manual electrode welding can also be used for processing. Select A207 electrode for welding. Electrode welding also requires the operation of clearing the roots between layers.




Question 2: Tips for Argon Arc Welding of Thin Stainless Steel Plates

Answer: It depends on your specific requirements, weld smoothness, deformation size, without polishing (polishing light), 0.7 is OK, 0.4, 05mm how you do, ha ha. Generally, 0.7 plate has a certain deformation after welding. To reduce it, try the following steps:

1. Minimize the gap between the weldments as much as possible (the tighter the better);

2. If you want to fill in the welding wire, the wire must be fine, 0.8 is OK.

3. The current point should be small enough to dissolve the welding wire, about 30A. The welding machines are different, depending on the welding machines.

4. Welding speed must be fast, the faster the better, the smaller the deformation, the more beautiful the weld, if there is water cooling, the better.

5. Welding machines are also exquisite. Inverter AC/DC welding machines are generally used, and the current is relatively stable. This welding opportunity is a little more expensive. It's all about technique. Just practice more!




Question 3: What is the cause of foaming in argon arc welding stainless steel plate

Description: When I welded two stainless steel plates with argon arc welding, the first burn was normal, because there were some small holes, so the second welding was carried out, but there were bubbles. I would like to ask you what is the reason, thank you!

There are some small bubbles in the first welding, so repair welding is carried out, but the bubbles are bigger and can not be welded well. The thickness of stainless steel is 0.6mm and the material is 201. Please give a good answer!

Answer: There may be the following reasons:

1. Cleaning of welds is not clean. Oil pollution, moisture, etc.

2. The protective gas is impure.

3. The end of welding wire is exposed to air.

Repair methods:

1. Shall we use an angular light machine to remove the stomata?

2. Clean the surface of the weld to be welded. (Cleaning with acetone if necessary)

3. Use 99.99% Argon

4. Welding wire ends should always be protected by inert gas.

Believe you, it will be welded.






Question 4: What other welded stainless steel plates are there besides argon arc welding?

Answer: Laser welding is the best, but it costs too much.






Question 5: Consult a master, 304 # 0.8 thick stainless steel plate and 201 # 0.8 thick stainless steel plate with argon arc welding problem

Description: 304 # 0.8 thick stainless steel plate and 201 # 0.8 thick stainless steel plate are welded by argon arc welding. Will the weld crack? Also, do 201 boards rust at 150 degrees high temperature and 95% high humidity?

Answer: In principle, it should not crack and rust. 201 itself is prone to rust.

Question: Is the welding seam rusty or is the whole piece rusty in this high temperature and humidity environment?

Answer: 201 # plate is easy to rust in welds and scratches!! 201 # material itself is not as good as 304 material in terms of oxidation resistance and corrosiveness!!! The service life itself is short, but there will be no problem in a short time. Two or three years should be no problem.What welding wire do you use? If you use carbon steel wire, it will crack.As long as technology comes home, it won't work! The material of 201 will certainly rust at high temperature






Question 6:500 Argon Arc Welding Machine Can't Weld 1.2MM Stainless Steel Plate? How to Weld 1.2mm Stainless Steel Plate

Answer: Tin soldering is also possible, but the strength is not high. Now stainless steel is coated with phosphoric acid liquid, and then soldered with electric soldering iron and tin.500 welding machines or 500 ampere welding machines. Mainly depends on the workload, long-term welding needs water-cooled welding machine, just a few points do not matter. Provide current reference 80 - 100 A, argon 5. One minute of continuous welding torch without water-cooled welding machine can't stand it.Yes, a small size welding torch can be replaced by a small clamp and fine tungsten pole. Best below 2.0. I don't understand what you mean by how to weld? Open the welding machine and weld the plate right!






Question 7: What is the diameter of the electrode required for argon arc welding of 4mm stainless steel plate?

Answer: butt welding, V-groove 2.0mm electrode bottom, 3.2mm cover. If mechanical properties are not required, 4 mm is OK once.2.5mm welding wire_2.4mm tungsten electrode for argon arc welding can be welded directly.See if you are butt welding or fillet welding, 2mm is about the same.






Question 8:2mm thick 304 stainless steel plate welding, with argon arc welding or stainless steel electrode is good?Answer: Argon arc welding is good naturally. Argon arc welding has obvious advantages in deformation control and burn-through energy when welding thin plates. Especially the welding of high alloy materials.Argon arc welding is good, argon arc welding thin plate effect is very good!





Question 9: Can argon arc welding weld stainless steel with a thickness of 0.2 mm to stainless steel with a thickness of 2 mm?

Answer: It can be welded, but this requires that the welder have relatively high operational skills and appropriate welding parameters.




Question 10:3mm stainless steel plate butt welding, vertical welding, diameter 2.5 welding rod, the current should be how much?

Answer: Current adjustment range 95-110A. Usually 3 mm sheet metal, the possibility of continuous welding is not very large, only spot welding. (If you adjust it a little, it will perforate and it will not burn if you adjust it a little.)Electric peak time current can be adjusted to 105 amperes, non-peak time to 100 amperes. Continuous arc welding requires high technology. Current size is an important condition, but the more important condition is that the technology is too hard. Spot welding is the work of layman. Only those who can perform continuous arc welding on steel plate less than 2 mm can be called welders.






Question 11:304 What type of electrode is used for stainless steel plate welding?

Answer: A132 or 137 electrode ER-308L wire,







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