Resistance welding is a method of applying pressure through electrodes after combining the workpieces, and using electric current through the contact surface of the joint and the resistance heat generated in the adjacent area to weld.
Read moreIndustrial control of cold drawn precision seamless steel pipe production includes condition control such as die design, annealing, pickling, lubrication, etc. At the same time, capillary quality inspection and maintenance work should also be carried out.
Read moreThe process properties of SSAW steel pipe include bending, surface quality, size, shape, weight and allowable deviation
Read moreBoiler tube is a type of seamless tube. The manufacturing method is the same as that of seamless pipes, but there are strict requirements on the steel grades used to manufacture steel pipes. According to the temperature of use, it is divided into two types: general boiler tubes and high-pressure boiler tubes.
Read moreFor hot-rolled thin-walled seamless pipes with rough product defects, inspection before rolling is to find surface abnormalities. However, after grinding and pickling, it was found that there were "dark spots" on the surface of the tube blank. Metallographic examination showed that the dark spots corresponded to coarse grains.
Read moreLow temperature tempering is also known as "stress relief tempering". The structure after tempering is tempered martensite.
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