Preparation method of multi-metal composite rod with irregular cross-section

Abstract

A novel preparing method of a multi-metal compounded bar with an irregular cross section shape is provided. The method comprises following processes: remodeling a base metal substrate according to product specifications; removing dirt on the inner and outer surfaces of a solid substrate and a hollow auxiliary material; assembling the solid substrate and the hollow auxiliary material; reducing caliber of ends of the solid substrate and the hollow auxiliary material; cleaning surface of the substrate tube material, and coating; performing cold drawing and forming of double metals or multi metals; and preforming fine alignment. Composite materials with different cross-section shapes can be prepared by the method. A cladding process between metals is emitted. Cold drawing and forming are directly preformed after the surface of an outer auxiliary material of a substrate-auxiliary material composite is coated with the coating having lubrication and protection functions, thus effectively increasing the production efficiency and reducing the production cost.

Description

technical field [0001] The invention belongs to the technical field of composite material processing, and in particular relates to a method for preparing multi-metal composite rods with irregular cross-sectional shapes. Background technique [0002] At present, the mainstream process of composite rod production is explosive compounding and hot extrusion compounding. Explosive compounding is gradually eliminated due to low pass rate, high risk, high technical requirements, and non-environmental protection; similarly, hot extrusion compounding is not standardized due to rolling compounding geometric dimensions. Poor appearance quality, high production cost, low efficiency, uneven cooling effect, poor mechanical properties, and uneven appearance of auxiliary materials, which are not conducive to energy saving and consumption reduction, have been abandoned by more enterprises. Patent document: In the new production process of bimetallic composite rods (patent number: ZL200810011...

AI Technical Summary

Problems solved by technology

The above process can only realize the compounding of two metal materials, and must go through the bimetal wrapping process (that is, the tube is tightly wrapped on the surface of the bar by cold extrusion, shrinkage or cold drawing), and then it can be hot-rolled The advanced technology makes the two metals composite together, the process is cumbersome, the efficiency is low, the cost remains high, and the cross-sectional shape of the product is single, and only round or flat bars can be produced. When customers have higher requirements (that is, require product cross-section When the shape is irregular), the process cannot meet the demand. The above-mentioned defects restrict the application of composite materials in more fields. method