Spiral Pipe Surface Decarburization Treatment

Spiral steel pipe is a strip steel coil as raw materials, regular temperature extrusion, according to the spiral shape of the bending molding, automatic double-wire double-sided submerged arc welding process for the inner seam and outer seam welded spiral seam steel pipe. The raw materials are strip coil, welding wire and flux.

The decarburization disposal of spiral pipe directly affects its service life, that is, its quality, which shows the impact of decarburization disposal on spiral pipe. If the surface is decarburized, the strength and abrasion resistance of spiral pipe will be reduced, which directly affects the service life of spiral pipe. If the decarburization layer on the spiral pipe, the surface layer of the spiral pipe hard should be decreased, and in the quenching process, because the volume of the inner and outer layers of the surface of the workpiece constitutes a crack.

Constitutes the spiral pipe surface decarburization medium is oxygen, water vapor and carbon dioxide and other oxidizing gases, when these gases hot spiral pipe contact, will constitute the spiral pipe oxidation and decarburization, therefore, control the furnace carbon dioxide and carbon monoxide ratio is also very important.

Dispose of the surface decarburization of the spiral pipe from the root of the primary thermal disposal process for disposal, because the decarburization and the spiral pipe together, in the process of thermal disposal, do not let the spiral pipe and the air contact, so that the decarburization of the surface can be improved.