Manufacturing method of carbon steel stainless steel double-metal polymerization pipe

Abstract

The invention relates to a manufacturing process of a double-metal steel pipe (a carbon steel stainless steel polymerization pipe); the process is combined with a 3D printing technology principle to form a layer of 2-25 microns of polymers on the surface of an inner pipe of the double-metal steel pipe; and then, the inner pipe is put in an outer pipe to perform the drawing polymerization molding for two steel pipes. The process comprises the steps of: preparation of raw materials of the inner and outer pipes-acid phosphorus soap for the outer pipe-coating of beef tallow lime on the inner surface of the inner pipe-winding of a lead on the outer surface of the inner pipe-coating of a polymer on the outer surface of the inner pipe-sleeving of the inner and outer pipes-head shrinkage-drawing-size determination through head and tail cutting-cleaning of the raw materials of the double-metal steel pipe-3D polymerization curing-straightening-flaw detection-cleaning of a finished product-preparation of antirust water and draining-packaging and warehousing for future delivery. The process applies a3D polymerization process to solve the problems of low bonding force of the inner and outer pipes and low heat conductivity in general double-metal pipes, obviously reduces the use level of heat exchanger stainless steel pipes in three industries, reduces the cost, and is green, environment-friendly and energy-saved.

Description

technical field [0001] The invention relates to the technical field of bimetallic steel pipes, and relates to a manufacturing process of bimetallic steel pipes (carbon steel stainless steel polymer pipes). . Background technique [0002] In the existing manufacturing technology of bimetallic pipes, the common processes at home and abroad include spinning method, traditional drawing method, hydrostatic pressure method and explosive forming method. [0003] Among them, the spinning method is to place a spinning die in the inner tube, and then drive the spinning die to plastically deform the metal of the inner tube through a mechanical transmission mechanism, and fit it on the inner surface of the outer tube. [0004] The traditional drawing method is to place a tapered mold in the inner tube of the bimetallic tube, and at the same time connect a mechanical drawing mechanism to the small head of the tapered mold, and make the metal of the inner tube produce Plastically deform...

AI Technical Summary

Problems solved by technology

In the general bimetallic tube process, due to the gap between the two layers of metal, there will be a problem of isolation during the heat transfer process, and the overall thermal conductivity cannot be guaranteed; at the same time, the stress concentration of the two layers of metal due to plastic deformation Therefore, if these bimetallic pipes are bent and formed, cracking of the steel pipes may occur, and it is actually impossible to carry out on-site assembly

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