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

A bimetal and clad plate technology, applied in metal rolling, metal rolling, metal processing equipment, etc., can solve the problem of inability to produce large-size, heavy-weight or thin-thickness titanium/steel bi-metal clad plates, and the interface bonding strength is not good. Stability, increase the cost of raw materials and other issues, to achieve the effect of low equipment requirements, simple and convenient pretreatment, and increased contact area

Active Publication Date: 2020-01-10
UNIV OF SCI & TECH BEIJING +1
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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

Method used

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preparation example Construction

[0036] Such as figure 1 Shown, according to the preparation method of high-performance titanium / steel bimetal clad plate of the present invention, comprises the steps:

[0037] Step 101: Annealing the pure titanium slab and the low-carbon steel slab, so that the hardness of the pure titanium slab is <180HV, the hardness of the low-carbon steel slab is <160HV, and the pure titanium slab and the The hardness difference of the low carbon steel slab is less than 20HV;

[0038] Step 102: Use louvers, grinding wheels or grinding wheels to polish the surface to be compounded of the pure titanium slab and the low-carbon steel slab after surface cleaning and degreasing, to remove pollutants and oxide layers on the surface to be compounded, and obtain a clean , The rough surface to be compounded, the direction of the grinding stripes formed by the grinding treatment is perpendicular to the rolling direction;

[0039] Step 103: Lay the pure titanium slab and the low-carbon steel slab t...

Embodiment 1

[0047] Preparation of TA2 titanium / Q235 steel bimetal composite plate.

[0048] Anneal the 1mm-thick TA2 pure titanium slab and the 4.5mm-thick Q235 low-carbon steel slab. The annealing system of the TA2 pure titanium slab is 750°C for 0.5h and then furnace cooling. The hardness after annealing is 148HV, and the Q235 low-carbon steel slab The annealing system of the steel slab is 870°C for 0.5h and then furnace cooling, and the hardness after annealing is 136HV; the TA2 pure titanium slab and the surface of the Q235 low carbon steel slab to be compounded are mechanically polished with a louver treatment to remove pollutants and oxide layers on the surface to be compounded to obtain a clean and rough surface to be compounded, and the direction of the grinding stripes formed by the grinding treatment is perpendicular to the rolling direction; the TA2 pure titanium slab and the Q235 low-carbon The steel slabs are stacked up and down, and the two sides of the head of the TA2 pure ...

Embodiment 2

[0050] Preparation of TA1 titanium / Q235 steel bimetal composite plate.

[0051] Anneal the 2mm thick TA1 pure titanium slab and the 4mm thick Q235 low carbon steel slab. The annealing system of the TA1 pure titanium slab is 750°C for 0.5h and then furnace cooling. The hardness after annealing is 140HV. Q235 low carbon steel plate The annealing system of the slab is furnace cooling at 920°C for 0.5h, and the hardness after annealing is 132HV; the TA1 pure titanium slab and the Q235 low carbon steel slab to be composited are mechanically ground with a grinding wheel, Remove the pollutants and oxide layer on the surface to be compounded to obtain a clean and rough surface to be compounded. The direction of the grinding stripes formed by the grinding treatment is perpendicular to the rolling direction; the TA1 pure titanium slab and the Q235 low carbon steel slab after the compounded surface treatment Lay it up and down, and use aluminum rivets to rivet and fix the two sides of th...

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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...

Claims

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Application Information

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IPC IPC(8): B21B1/38B21B47/00
CPCB21B1/38B21B47/00B21B2001/386
Inventor 刘雪峰王怀柳白于良代广霖石章智王文静
Owner UNIV OF SCI & TECH BEIJING
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