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Why can't some steel be welded with a flash butt welder?
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Why can't some steel be welded with a flash butt welder?
Release time:2022.06.07
Summary of information:
Whether it can be welded with the Xinxing flash butt welder depends on the type of steel? Steel is divided into: (1) Ferritic F steel (2) Austenitic (A) steel (3) Cementite Fe C steel (4) Pearlite (P) steel (5) Martensite (M) steel
Can I use Nova?Flash butt welding machineIs welding related to the type of steel?Steel is divided into:
(1) Ferritic F steel
(2)Austenitic (A) steel
(3) Cementite F e C steel
(4) Pearlite (P) steel
(5) Martensitic (M) steel
1. Ferritic steel
The interstitial solid solution formed by carbon dissolved in a-Fe is called ferrite, commonly represented by the symbol F.
Ferrite characteristics:
①Body-centered cubic lattice
②The solubility of carbon in c-Fe is also small
③Good plasticity and toughness, but low strength and hardness.
④Low carbon content and good weldability
2. Austenitic steel
The interstitial solid solution formed by carbon dissolved in γ-Fe is called austenite, represented by the symbol A.
Austenite characteristics:
①Face-centered cubic lattice
② Strong ability to dissolve carbon
③It has low hardness and high plasticity, suitable for pressure processing and molding, and has moderate weldability.
3. Cementite
The metal compound Fe 3C formed by iron and carbon is called cementite, represented by Fe3C
Characteristics of cementite:
①Dissolved carbon content = 6.69%, melting point is 1227°C
②Crystal structure:
Complex interstitial compounds.
③The hardness is very high, but the plasticity and toughness are almost zero. Not solderable
4. Pearlite (P) steel
Pearlite (P) steel is a mechanical mixture of ferrite and cementite, represented by the symbol P.
Pearlite (P) steel characteristics
①Dissolved carbon content is about 0.77%
② Ferrite and cementite are a mixture of alternating lamellar layers.
③High strength, moderate hardness, certain plasticity, not easy to resist welding.
5. Martensitic (M) steel
The supersaturated solid solution of carbon in a-Fe is called martensite, represented by the symbol M.
Characteristics of martensitic (M) steel
①The dissolved carbon content is about 0.2%. The higher the content, the higher the hardness.
②Lath-like
③High strength and certain toughness. Weldable, heat treatment required after welding.
Solderability
As the mass fraction of carbon in steel increases, the plasticity of the steel decreases and the weldability decreases. Therefore, in order to ensure high-quality welded joints,
Low carbon steel (steel with carbon mass fraction <0.25%) should be preferred. Steel with a carbon mass fraction of >0.5% is generally not used because of poor weldability. If it is to be used, necessary welding process measures should be taken.
Wuxi Xinxing Welding Equipment Factory has been engaged in resistance welding for 29 years. Its core technology products include: semi-automatic butt welding machine, pneumatic-flash butt welding machine, multi-strand wire welding machine, foot 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 welding machine,Auto parts spot welding machine, sheet metal spot welding machine, home appliance hardware spot welding machine, small electrical appliance spot welding machine, copper bar copper pipe welding machine, nut spot welding machine, stainless steel welding machine, foil belt spot welding machine, aluminum spot welding machine, multi-head spot welding machine, bag cage spot welding machine, mesh row welding machine, There are more than 300 types of ton barrel frame 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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Butt welding of brass decorative strips
Summary of information:
Brass decorative strips are generally small and thin, and are mainly used for decoration and splicing of bamboo fiber boards, marble, and solid wood boards. The quantity to be connected is generally not very large, but the value is great, so it would be a pity to waste it. It is the best choice to use Xinxing semi-automatic butt welding machine for welding. The workpiece does not change color or deformation after welding, and it is fast.
Brass decorative strips are generally small and thin, and are mainly used for decoration and splicing of bamboo fiber boards, marble, and solid wood boards. The quantity to be connected is generally not very large, but the value is great, so it would be a pity to waste it. The best choice is to use the Xinxing semi-automatic butt welding machine for welding. It does not discolor or deform the workpiece after welding, and it is fast. It mainly uses the resistance heat of the brass itself to weld, which saves electricity and energy. The operation is simple, the price is affordable, and the service life is long, up to 20+ years.
Operation points:
1. There should be no rust, oil stains, etc. on the surface of the workpiece, otherwise it will affect the flow of current. Problems with the flow of current will naturally affect the welding quality.
1. The length of the two workpieces extending out of the electrode is the same.
2. The end faces of the two workpieces must be in contact before welding.
3. Set the three main parameters: welding current, welding time and upsetting force. To find the best parameter values, we need to test them one by one. Start with a small value first, and then slowly increase it until we find the right one. But most of them use hard specifications for welding, that is, high current and short time.
3. The slow-rise function allows the current to rise in an oblique manner instead of straight up and down, thus controlling splashing with an inhibition rate of more than 90%.
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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