Article
Low carbon steel has high resistivity. When melted at high temperature, the carbon element produces protective atmosphere CO and CO2, and does not produce high melting point oxides. Therefore, resistance butt welding andflashlight pairweldWeldability is good. Medium carbon steel has a higher carbon content than low carbon steel, and its resistivity is also higher. The crystallization interval, high temperature strength and hardening tendency all increase accordingly. We need to increase the upsetting force and upsetting allowance. To reduce the effects of quenching. Generally, preheated flash butt welding is used for welding, and post-weld heat treatment is performed.
When flash butt welding of low carbon steel and medium carbon steel, due to carbon diffusion to the heated end face and chemical reaction, when upsetting, the liquid metal with high carbon content in the semi-melted zone is squeezed out, so a bright band is formed at the joint, that is, a carbon-depleted layer weld with low carbon content. Generally, we use heat treatment to eliminate the carbon-depleted layer.
In addition to low carbon steel and medium carbon steel, the flash butt welding machine can also butt high carbon steel, such as cast iron steel rings. We generally use preheated flash butt welding for cast iron steel rings. Due to the high carbon content, a large amount of C0 and C02 protective atmosphere is generated during flash welding. The self-protection effect is strong and it is easy to squeeze out the liquid metal with high carbon content to obtain high-quality joints.
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 aluminum rod disc circular 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 There are more than 300 types of row 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.