Preparation method of high-performance titanium/steel bimetallic composite plate

Abstract

The invention discloses a preparation method of a high-performance titanium / steel bimetallic composite plate, and belongs to the technical field of preparation of bimetallic composite plates. A pure titanium slab and a low-carbon steel slab are subjected to annealing treatment, the hardness of the slabs is reduced, and the hardness of the pure titanium slab and the hardness of the low-carbon steelslab are close; then the to-be-composited surfaces of the slabs are cleaned, degreased and ground, wherein the grinding stripe direction is perpendicular to the rolling direction; then the pure titanium slab and the low-carbon steel slab are stacked to obtain a combined slab, the head of the combined slab is riveted, the combined slab is subjected to single-pass cold rolling pre-compounding, andthen heating is carried out; and finally, single-pass hot rolling final compounding is carried out, and the high-performance titanium / steel bimetallic composite plate is obtained. The method is low inequipment requirement, short in process flow, high in production efficiency and low in production cost. The interface bonding strength of the prepared titanium / steel bimetallic composite plate is larger than 230 MPa, the area bonding rate is 100%, and the method is particularly suitable for preparation of high-performance thin titanium / steel bimetallic composite plates or thin-titanium-layer titanium / steel bimetallic composite plates.

Description

technical field [0001] The invention belongs to the technical field of bimetal composite plate preparation, and in particular provides a method for preparing a high-performance titanium / steel bimetal composite plate. Background technique [0002] The titanium / steel bimetal composite plate formed by laminating titanium plate and steel plate in a layered manner not only has the excellent corrosion resistance of titanium, but also has the advantages of high strength and low cost of steel. It is widely used in petroleum, chemical and shipbuilding fields. Has a wide range of uses. [0003] At present, the methods for preparing titanium / steel bimetal clad plates are mainly explosive clad method and hot rolling clad method. Due to the problems of high energy consumption, serious environmental pollution and potential safety hazards, the explosive cladding method has been gradually replaced by the hot rolling cladding method. The traditional hot-rolling cladding method is to mechan...

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Problems solved by technology

Although the traditional hot rolling cladding method solves the problems of environmental pollution, low yield and inability to produce large-size, heavy-coil weight or thin-thick titanium / steel bimetallic clad plates in the explosive cladding process, there are still the following main problems:

[0004] (1) The interface to be compounded of the titanium plate and steel plate is easy to react with oxygen in the air to form oxides under high temperature conditions, which affects the quality of the compound. Therefore, the traditional hot rolling compounding method needs to weld the billets around the compounded interface and vacuumize or vacuum Under the environment, the billets are welded around the composite interface to avoid oxidation of the composite interface during heating or hot rolling. The requirements for equipment are high and the process is cumbersome, and the production efficiency is low.

[0005] (2) The traditional hot-rolling composite method requires multi-pass hot rolling, and the total reduction is >90%. Generally, the starting rolling temperature is >900°C and the final rolling temperature cannot be lower than 750°C. When the temperature reaches 882°C, Titanium will undergo a phase transition from α→β. When the temperature exceeds 882°C, brittle intermetallic compounds such as TiC and Ti-Fe will easily form at the interface between titanium and steel, especially the formation of Ti-Fe phase will seriously affect the titanium / steel bimetallic composite. The interface bonding strength of the plate, so the traditional hot rolling composite method sometimes adds a transition layer such as copper, nickel or niobium between the titanium and the steel to prevent the direct contact between the titanium and the steel, and avoid the generation of Ti-Fe phase at the interface; the addition of the transition layer Raw material costs are increased, production efficiency is reduced, and the transition layer will react with titanium and steel to form new intermetallic compounds, resulting in unstable interfacial bonding strength

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