Casting-rolling method based on multi-layer heterogeneous composite roll sleeve and apparatus thereof

Abstract

The present disclosure relates to metal material casting-rolling forming technology, and specifically to a casting-rolling method and apparatus based on a multi-layer heterogeneous composite roll sleeve. By alternately arranging a plurality of metal components on the composite roll sleeve and adjusting distribution of the metal components in the composite roll sleeve according to structural parameters and process parameters of the monometallic metals and layered metal composite materials, a layer thickness of the metal components at different radial positions of the composite roll sleeve is determined based on the solidification range of monometallic metals and the offset of the solidification point position in the heat transfer process of layered metal composite materials. This can significantly improve forming quality of strips.

What is claimed is: 
     
         1 . A casting-rolling method based on a multi-layer heterogeneous composite roll sleeve, comprising following steps:
 S 1 , determining structural and process parameters for casting-rolling of a target metal, and determining an N-layer arrangement of M metal components of the composite roll sleeve, analyzing a heat transfer thermal resistance path, and determining a layer thickness of each of the metal components of the composite roll sleeve in a radial direction of the composite roll sleeve based on a solidification temperature range, a target solidification point position, and an asymmetric heat transfer solidification point offset of the target metal;   S 2 , preparing the composite roll sleeve according to the N-layer arrangement of the M metal components and the layer thickness of each of the metal components as determined in step S 1 , a spatial composite interface being present between adjacent metal components, and then assembling the composite roll sleeve with a casting-rolling mill set;   S 3 , allowing the target metal to flow from a pouring system into a casting-rolling zone enclosed by a plurality of composite roll sleeves, and under solidification and rolling deformation actions of the composite roll sleeve, a solidification point is at a target solidification point position, and the target metal is solidified and deformed to obtain a target metal product.   
     
     
         2 . The casting-rolling method based on the multi-layer heterogeneous composite roll sleeve according to  claim 1 , wherein in step S 3 , when the target metal is a monometallic metal, liquid monometallic metal flows from the pouring system into the casting-rolling zone enclosed by the plurality of composite roll sleeves, and under solidification and rolling deformation actions of the composite roll sleeve, the solidification point is at the target solidification point position, and the liquid monometallic metal is solidified and deformed to obtain a monometallic metal strip. 
     
     
         3 . The casting-rolling method based on the multi-layer heterogeneous composite roll sleeve according to  claim 1 , wherein in step S 3 , when the target metal is a layered metal composite material, a solid base metal is fed into a solid casting-rolling zone enclosed by the plurality of composite roll sleeves through an uncoiling device, liquid cladding metal enters the solid-liquid casting-rolling zone from the pouring system, and under asymmetric solidification and rolling deformation actions of the plurality of composite roll sleeves, the solidification point is at the target solidification point position, and the liquid cladding metal is solidified and deformed to achieve metallurgical bonding with the solid base metal to obtain a layered metal composite material. 
     
     
         4 . The casting-rolling method based on the multi-layer heterogeneous composite roll sleeve according to  claim 1 , wherein in step S 1 , each of the metal components has a uniform or variable layer thickness in the radial direction of the composite roll sleeve. 
     
     
         5 . The casting-rolling method based on the multi-layer heterogeneous composite roll sleeve according to  claim 4 , wherein in step S 1 , the M metal components are arranged in N layers in an alternating manner along a circumferential direction of the composite roll sleeve, and N is an integer between M and 3M. 
     
     
         6 . The casting-rolling method based on the multi-layer heterogeneous composite roll sleeve according to  claim 4 , wherein in step S 1 , the target solidification point position is a center of a roll gap, and the asymmetric heat transfer solidification point offset is an offset of the asymmetric heat transfer solidification point position relative to the target solidification point position. 
     
     
         7 . A casting-rolling apparatus for the casting-rolling method based on the multi-layer heterogeneous composite roll sleeve according to  claim 1 , comprising: a main drive system, a main frame, a position control system, a pouring system, a casting-rolling mill set, and an uncoiling device, wherein an output shaft of the main drive system is connected to a first end of a roll core of the casting-rolling mill set, the casting-rolling mill set is disposed at a first end of the main frame, the position control system is disposed at a second end of the main frame and connected to the casting-rolling mill set, the uncoiling device is disposed at a third end of the main frame, and the pouring system is disposed at an end of the uncoiling device;
 the casting-rolling mill set comprises: a roll core, a first bearing seat, a composite roll sleeve, a second bearing seat, and a rotary joint, wherein the roll core extends axially through the first bearing seat, the composite roll sleeve, and the second bearing seat in sequence, the rotary joint is disposed at a second end of the roll core, the composite roll sleeve is connected to the roll core and rotates synchronously with the roll core, the roll core and the composite roll sleeve form an enclosed space, and the enclosed space is provided with circulating cooling water;   M metal components of the composite roll sleeve are arranged in N layers in an alternating manner along a circumferential direction of the composite roll sleeve, and a spatial metallurgical bonding composite interface is present between adjacent metal components.   
     
     
         8 . The casting-rolling apparatus for the casting-rolling method based on the multi-layer heterogeneous composite roll sleeve according to  claim 7 , wherein a shape of the composite interface is one or more of sine, cosine, spline, rectangular, triangular, or arc. 
     
     
         9 . The casting-rolling apparatus for the casting-rolling method based on the multi-layer heterogeneous composite roll sleeve according to  claim 7 , wherein a high-temperature-resistant ceramic coating is provided on an outermost side of the composite roll sleeve.