I don’t know the way much you recognize about seamless steel pipe? Seamless steel tubes are circular, square and rectangular hollow section steel tubes without external joints. Seamless steel tube is formed of steel ingot or solid tube billet through perforation into capillary tubing. it’s then made by hot rolling, cold rolling or cold drawing. Seamless steel tubes have hollow sections and are often used as conduits for transporting fluids. they need the identical bending and torsional strength and are lighter than solid steel like round steel. they’re economical cross section steel and are widely employed in the manufacture of structures, parts and mechanical parts, like steel scaffolding utilized in oil drilling.
In the seamless steel pipe process, there are many steps to get pipes with such prime quality. Satisfactory metallographic structure is obtained by eliminating work hardening of seamless steel tubes. Process equipment is bright annealing furnace, mainly used for. The finished chrome steel is heat treated in a very protective atmosphere. When the appliance performance of seamless steel pipe is different, the metallographic structure after bright annealing is additionally different, therefore the process of bright heat treatment are going to be different.
After cold working, the residual stress of seamless steel pipe material remains, and therefore the residual stress is incredibly unfavorable to the strain corrosion cracking of the pipe. Any degree of cold working leads to a major increase in stress corrosion cracking resistance. The degree of cold working also has adverse effect on the hot temperature resistance of austenitic stainless-steel. Generally, the upper the working temperature or the upper the fracture life requirements, the lower the degree of cold processing.
As may be seen from the above introduction, the warmth treatment process of seamless steel pipe is sort of troublesome. so as to get qualified metallographic structure, the adjustment a part of the cooling section equipment of bright annealing furnace has to be large. Therefore, the advanced bright annealing furnace usually adopts strong convection cooling in its cooling section, and has three cooling sections, which might adjust the air volume separately. it’s divided into three sections along the width of the strip.
Post time: Jan-04-2022