Process for rolling inner-corrugated combined surface metal composite tube

Abstract

The invention provides a process for rolling an inner-corrugated composite surface metal composite tube. The process for rolling the inner-corrugated composite surface metal composite tube comprises the steps: selecting a metal parent tube and a metal coated tube, and manufacturing a tube blank by combining the coated tube outside and the parent tube inside, wherein the deformation resistance of the coated tube is smaller than the deformation resistance of the parent tube; rolling the manufactured composite tube blank in a composite roughing mill, in which a spiral corrugated mandril is mounted, thereby obtaining a composite tubular billet, the inner surface and the composite surface of which have a spiral corrugated shape, wherein the spiral corrugated shape can be circular arc, ellipse, sine wave, triangle, trapezoid or rectangle, the corrugated height is (0.1-10) times of the thickness of the coated tube, and the width of the corrugated is (3-20) times of the height of the corrugated; putting the composite tubular billet in a composite finishing mill, in which a smooth circular hole is formed, to roll the corrugated shape of the inner surface to be level and round till the required tube wall thickness is obtained, thereby obtaining a composite tube. According to the process for rolling the inner-corrugated composite surface metal composite tube, by utilizing corrugated composite surfaces of the roughly rolled coated tube and parent tube, the difference of metal plastic deformation caused by dissimilar metal deformation resistance difference is solved, the composite strength and force of metal layers are increased, and the composite rate is improved.

Description

technical field [0001] The invention belongs to the technical field of metal composite pipe preparation, and in particular relates to a process for rolling a metal composite pipe with an inner corrugated joint surface. Background technique [0002] Bimetal composite pipe (hereinafter referred to as composite pipe), also known as double-layer pipe or clad pipe, is composed of two different metal pipes. The tubes are tightly combined through various deformation and connection techniques. When an external force is applied, the inner and outer tubes deform at the same time and the interface does not separate. The general design criterion is that the base material meets the design stress, and the cladding material can resist corrosion or wear, etc. Compared with a single metal pipe, the composite pipe makes full use of the best performance of the base pipe and the cladding pipe, not only has high strength, but also has excellent corrosion resistance and wear resistance, saves a ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problem of poor bonding performance of the composite interface during the production of composite pipes, and to provide a process for rolling metal composite pipes with inner corrugated joint surfaces

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