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Understand the weldability of steel before buying a flash butt welder
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Understand the weldability of steel before buying a flash butt welder
Release time:2022.06.07
Summary of information:
Welding steel mainly depends on the carbon content to determine whether it can be welded or not. In order to ensure high-quality welded joints, Xinxing editor recommends giving priority to low carbon steel, and then medium carbon steel.
Whether it is resistance welding or usingFlash butt welding machineFlash welding and welding of steel mainly depends on the carbon content in the steel. In order to ensure high-quality welded joints, we should give priority to low carbon steel and then medium carbon steel.
1. Low carbon steel: carbon content less than 0.25%
The strength is not high, the hardness is good, and the plasticity is good. It is widely used. Commonly used low carbon steels for welding include Q235, No. 20 steel, 20g, and 20R.
Welding features:
It is not easy to produce cold cracks. There is no need to preheat before welding. Killed steel is not sensitive to hot cracks. Boiling steel is more likely to produce hot cracks. The welding process is simple. There are no special requirements for the welding power source. AC and DC welding machines can perform all-round welding.
2. Medium carbon steel: carbon content is 0.25%~0.60%
The strength is higher, but the weldability is poor. Commonly used steels are No. 35, 45 and 55.
Welding features:
It is easy to produce cold cracks and hot cracks. Due to the high carbon content, the sensitivity to pores increases, so trial welding is required in advance.
3. High carbon steel: carbon content greater than 0. 60%
Due to the high carbon content, the welding properties are poor.
Welding features:
Cracks are more likely to occur, the welds are fragile, and the strength of the welded joints is reduced.
Wuxi Xinxing Welding Equipment Factory has been engaged in resistance welding machines for 29 years. Its core technology products include:Semi-automatic butt welding machine, Pneumatic-flash butt welding machine, multi-strand wire welding machine, foot pedal spot welding machine, pneumatic spot welding machine, medium frequency spot welding machine, row welding machine mesh welding machine, resistance automatic welding machine, energy storage welding machine, copper rod and aluminum rod disc circular welding machine, auto parts spot welding machine, sheet metal spot welding machine, home appliance hardware spot welding machine, small appliance spot welding machine, copper row copper pipe welding machine, nut spot welding machine, There are more than 300 types of stainless steel welding machines, foil strip spot welding machines, aluminum spot welding machines, multi-head spot welding machines, bag cage spot welding machines, mesh welding machines, ton rack welding production lines, resistance automatic welding machines, brazing machines, diffusion welding machines, projection welding machines, seam welding machines, wire and cable optical cable supporting equipment, etc. If you are interested in our welding equipment, please contact us.
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Butt welding of iron wire
Summary of information:
Superimposed vertical butt welding of iron wires, mainly various steam racks, hanging racks, filters, handicrafts, dish racks, mesh, etc. Horizontal butt welding is used to extend iron wires and is widely used in wire and cable, wire drawing, construction and other industries. Key points for welding: 1. It is more suitable to use electrodes made of chromium, zirconium and copper materials. 2. Pay attention to maintaining
Superimposed vertical butt welding of iron wires, mainly various steam racks, hanging racks, filters, handicrafts, dish racks, mesh, etc. Horizontal butt welding is used to extend iron wires and is widely used in wire and cable, wire drawing, construction and other industries.
Welding points:
1. It is more suitable to use electrodes made of chromium, zirconium and copper materials.
2. Pay attention to keeping the workpiece clean and free of oil, rust and other oxides that may affect conductivity. They will increase the contact resistance, cause burns on the workpiece surface, rapid electrode wear and increase power loss.
3. The welding parameters should be high current for a short time, so that the welding is fast and good.
4. For workpieces that are difficult to align and easy to shake, use insulating molds to position them.
Wuxi Xinxing Welding Equipment Factory has been engaged in resistance welding for 29 years. Its core technical products include: semi-automatic butt welding machine, pneumatic-flash butt welding machine, multi-strand wire welding machine, foot pedal spot welding machine, pneumatic spot welding machine, medium frequency spot welding machine, row welding machine mesh welding machine, resistance automatic welding machine, energy storage welding machine, copper rod and aluminum rod disc circular welding machine, auto parts spot welding machine, sheet metal spot welding machine, home appliance hardware spot welding machine, small electrical appliances There are more than 300 types of spot welding machines, copper bar copper tube welding machines, nut spot welding machines, stainless steel welding machines, foil strip spot welding machines, aluminum spot welding machines, multi-head spot welding machines, bag cage spot welding machines, mesh welding machines, ton rack welding production lines, automatic resistance welding machines, brazing machines, diffusion welding machines, projection welding machines, seam welding machines, wire and cable optical cable supporting equipment, etc. If you are interested in our welding equipment, please contact us.
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