How many manufacturing technologies are there for stainless steel coiled tubing?
By: mxgy,
Stainless steel coiled tubing is a new type of oil pipe that can achieve repeated bending and multiple plastic deformations, and the longest single piece can reach 9000m.
Today we will mainly learn about the core manufacturing technologies of stainless steel coiled tubing.
①Heat treatment: through heat treatment of the pipe body, the best control of structure and performance is achieved, especially high strength, high plasticity and low residual stress.
② Processing: After the work hardening caused by dislocation proliferation and Bauschinger effect work together, the transformation law of the pipe body strength is controlled.
③Chemical elements: Due to the harsh service environment, there are high requirements for the mechanical properties and corrosion resistance of pipes, and the chemical composition of materials must be optimized. It is also necessary to realize the clean control of the whole process of smelting and rolling, and reduce inclusions as much as possible. And the content of harmful elements such as S and P.
④ Welding technology: HFW welding technology is mainly used for low-carbon micro-alloyed steel nowadays, and it is necessary to study the optimal welding process parameters (such as voltage, current, welding speed, forming angle, extrusion amount, etc.), and study the heat treatment technology of weld seam and weld seam .
⑤ Plate butt joint: If you want to realize the continuous production of HFW welded pipes, the plate must be lengthened. At present, the plate butt joint mainly adopts TIG, MAG and plasma welding methods, and the friction stir welding method is the method currently being studied.
⑥ Pipe butt joint: Because the stainless steel coiled tubing may cause local damage during use, the damaged part must be cut off and the pipe connected by welding. The connection method of the transmission is generally manual TIG welding, and the welding quality is difficult to control. The currently used For fully automatic welding technology.
⑦ New manufacturing technology: such as CVR technology, that is, continuous tubes using the same specification tube blank. On-line through intermediate frequency induction, heating to 940°C, and rolling through thermal mechanism, on the one hand, the optimization or seamlessness of the HFW weld can be realized, and on the other hand, the change of wall thickness or diameter can be realized.
How many manufacturing technologies are there for stainless steel coiled tubing?
By: mxgy,
Stainless steel coiled tubing is a new type of oil pipe that can achieve repeated bending and multiple plastic deformations, and the longest single piece can reach 9000m.
Today we will mainly learn about the core manufacturing technologies of stainless steel coiled tubing.
①Heat treatment: through heat treatment of the pipe body, the best control of structure and performance is achieved, especially high strength, high plasticity and low residual stress.
② Processing: After the work hardening caused by dislocation proliferation and Bauschinger effect work together, the transformation law of the pipe body strength is controlled.
③Chemical elements: Due to the harsh service environment, there are high requirements for the mechanical properties and corrosion resistance of pipes, and the chemical composition of materials must be optimized. It is also necessary to realize the clean control of the whole process of smelting and rolling, and reduce inclusions as much as possible. And the content of harmful elements such as S and P.
④ Welding technology: HFW welding technology is mainly used for low-carbon micro-alloyed steel nowadays, and it is necessary to study the optimal welding process parameters (such as voltage, current, welding speed, forming angle, extrusion amount, etc.), and study the heat treatment technology of weld seam and weld seam .
⑤ Plate butt joint: If you want to realize the continuous production of HFW welded pipes, the plate must be lengthened. At present, the plate butt joint mainly adopts TIG, MAG and plasma welding methods, and the friction stir welding method is the method currently being studied.
⑥ Pipe butt joint: Because the stainless steel coiled tubing may cause local damage during use, the damaged part must be cut off and the pipe connected by welding. The connection method of the transmission is generally manual TIG welding, and the welding quality is difficult to control. The currently used For fully automatic welding technology.
⑦ New manufacturing technology: such as CVR technology, that is, continuous tubes using the same specification tube blank. On-line through intermediate frequency induction, heating to 940°C, and rolling through thermal mechanism, on the one hand, the optimization or seamlessness of the HFW weld can be realized, and on the other hand, the change of wall thickness or diameter can be realized.
