CN1199742C - Liquid phase rolling method for preparing metal composite material - Google Patents

Abstract

The present invention relates to a metal compound material preparing method through liquid phase rolling. In the technology, a liquid phase rolling method is used for compounding two metals or three metals. The technology comprises the steps that metals needing to be compounded are respectively melted; the metals are poured into a vertical two-roll rolling mill with a cooling device for compound rolling; three guard boards or four guard boards are used in the rolling mill so that bimetallic or trimetallic compound materials can be respectively rolled; compound sections with simple cross sections can be rolled through the use of pass rolls and guard boards with the corresponding shape; materials as finished products are obtained through the treatment of forced cooling and diffusion anneal. During the compound rolling of the materials as finished products, the transitory mutual contact for fusion sintering between pure molten metals results in the avoidance of the oxidation of metal surfaces. The present invention has the characteristics of rapid metal coagulation and semisolid processing, metallurgical bonding interfaces with firm and small tissues can be formed, and energy consumption reduction and scale production are realized.

Description

Preparation of Metal Composite Materials by Liquid Phase Rolling

1. Technical field: This invention relates to a composite material between different metals and its preparation method, which belongs to the field of metal matrix composite materials.

2. Background technology: Metal and metal composite materials (such as copper-titanium, titanium-steel, steel-aluminum composite panels, etc.) combine the characteristics of two different metals and integrate the respective advantages of the two metals, so in It is widely used in chemical industry, metallurgy, building materials, aerospace and other fields.

At present, the known compounding technologies of bimetallic composite materials based on plates and strips mainly include solid-solid phase rolling compounding, solid-liquid phase rolling compounding and explosive compounding, etc., but all of them have low bonding strength and high energy consumption. , complex process, limited product size and other defects.

The liquid-phase rolling compounding technology adopted in the present invention is obtained on the basis of metal melting and casting compounding and semi-solid processing technology. During compounding, due to the short-term contact and sintering of pure liquid metals, the problem of metal surface oxidation is avoided, and the problem of rapid cooling to Semi-solid rolling under pressure in semi-solid state has the characteristics of rapid metal solidification and semi-solid processing, which can form a firm and fine metallurgical bonding interface, reduce energy consumption, and realize short-process net shape processing. Therefore, the advantages of liquid phase composite rolling to prepare metal composite materials are: 1) It can improve the bonding strength of the composite interface; 2) It can reduce energy consumption; 3) It can simplify the process and realize large-scale production.

3. Contents of the invention

1. Purpose

A liquid-phase rolling method is used to produce double-layer or three-layer metal composite materials with high bonding strength at low cost, including composite plates and strips and other composite materials with simple cross-sectional shapes. Two or three different metals can be combined, and the representative ones are: 1) copper-titanium, titanium-steel, steel-aluminum, aluminum-titanium, steel-stainless steel and other bimetallic double-layer composite panels; 2 ) Titanium-copper-titanium, titanium-steel-titanium, aluminum-steel-aluminum, aluminum-copper-aluminum, stainless steel-steel-stainless steel and other bimetallic three-layer composite strips; 3) titanium-steel-aluminum, aluminum- Copper-steel and other three-metal three-layer structure composite strips; 4) composite materials with other simple cross-sectional shapes (such as circle, ellipse, square, rectangle, etc.) between the above and other metals.

2. Technical solution

(1) Process

Fig. 1 is a process flow diagram of the present invention. Figure 2 is a schematic diagram of the roll configuration of the rolling mill.

The metals to be compounded are heated and melted separately, and then poured into a rolling mill with a cooling device for compound rolling. The rolling mill uses 3 baffles and 4 baffles to roll bimetallic and trimetallic composite materials respectively, and uses grooved rolls and corresponding shapes. The baffle can be used to roll composite profiles, and the rolled metal composite materials continue to be forced to cool, and the cooled metal composite materials can be coiled, and finally the metal composite materials are rolled at a temperature of 0.4 to 0.9 times the melting point of the low-melting metal in the composite materials. Diffusion annealing, the annealed composite plate can be further processed and processed to the required size and performance.

(2) Equipment

1) Conventional metal melting furnace;

2) special rolling mill;

3) Conventional annealing furnace.

(3) Technical conditions

1) Metal material: two or three different metals, among which copper and copper alloy, aluminum and aluminum alloy, titanium and titanium alloy, magnesium and magnesium alloy, carbon steel and stainless steel, precious metal are the most effective;

2) Metal melting temperature: 50-300°C above the melting point of the metal

3) Rolling mill form: two-roller vertical;

4) Rolling force: 1-100 tons;

5) Roll diameter: 50-800mm;

6) Roll length: 20-1600mm;

7) Roll cooling intensity: 1-200°C/s;

8) Forced cooling intensity after rolling: 5-200°C/s;

9) Rolling speed: 10-100000mm/min;

10) Baffle material: ceramics;

11) Annealing technical conditions: the temperature is 0.4-0.95 times the melting point of the low melting point metal in the composite material, and the time is 10-300 minutes;

12) Composite material size: plate and strip, thickness 2-20mm, width 10-1500mm; simple section profile: the maximum size (width or height) is not greater than 200mm.

4. Description of drawings

Fig. 1 is a process flow diagram of the present invention. Fig. 2 is a schematic diagram of the configuration of rolls in a three-baffle rolling mill of the present invention, in which 1 is a baffle and 2 is a rolling mill.

5. Specific implementation

Example 1: 1Cr18Ni9Ti stainless steel-Q235 steel bimetallic double-layer composite plate strip

1Cr18Ni9Ti stainless steel and Q235 steel are melted at 1400 degrees and 1500 degrees respectively, poured into a vertical two-roll rolling mill with 3 baffles (roll diameter 300 mm, roll body length 800 mm), using 20 tons of rolling force and 2 m/min 1Cr18Ni9Ti stainless steel-Q235 steel double-layer composite strip with a thickness of 5 mm (2.5 mm for stainless steel and Q235 steel) and a width of 600 mm After that, the strip can be subjected to subsequent treatment (hot rolling and annealing) using conventional stainless steel processing and treatment methods.

Example 2: TC4 titanium alloy-6061 aluminum alloy-TC4 titanium alloy bimetallic three-layer composite plate strip

TC4 titanium alloy and 6061 aluminum alloy are melted at 1700 degrees and 780 degrees respectively, poured into a vertical two-roll mill with 4 baffles (roll diameter 300 mm, roll body length 800 mm), using 10 tons of rolling force and 1 m/min The rolling speed, the roller and the cooling intensity after rolling are 20 degrees/second and 50 degrees/second respectively, and the thickness can be obtained at 5 mm (the middle 6061 aluminum alloy is 3 mm, and the two outer layers of TC4 titanium alloy are 1 mm each), width 600 millimeters of TC4 titanium alloy-6061 aluminum alloy-TC4 titanium alloy bimetallic three-layer composite plate strip, which can be followed up by conventional 6061 aluminum alloy processing and treatment methods (hot rolling and annealing).

Example 3: MB7 magnesium alloy-H68 copper alloy bimetallic copper-clad magnesium round rod

MB7 magnesium alloy and H68 copper alloy are melted at 700 degrees and 1000 degrees respectively, and poured into two baffles (round, inner circle cast magnesium alloy, outer circle cast copper alloy) vertical two-roll pass mill (roll diameter 300mm , roll body length 800 mm), using 25 tons of rolling force and rolling speed of 1.5 m/min, the roll and cooling intensity after rolling are 30 degrees/s and 100 degrees/s respectively, and the outer diameter of 30 mm (middle magnesium The MB7 magnesium alloy-H68 copper alloy bimetallic copper-clad magnesium round bar with an alloy diameter of 20 mm can be used for subsequent processing (hot rolling and annealing) by conventional MB7 magnesium alloy processing and treatment methods.

Claims (4)

1, the rolling method for preparing metallic composite of a kind of liquid phase is characterized in that:

(1) technological process: will melt respectively by compound metal, pour in the band cooling device milling train and carry out composite rolling, the composite wood that rolls out is forced cooling, and cooling back and metal composite material carry out getting the finished product material after the diffusion annealing;

(2) technical conditions:

1) metal charge: two or three different metal;

2) metal melt temperature: the above 50-300 of melting point metal ℃;

3) roll-force: 1-100 ton;

4) roller diameter: 50-800mm;

5) roll barrel is long: 20-1600mm;

6) roll intensity of cooling: 1-200 ℃/second;

7) prick the back and force intensity of cooling: 5-200 ℃/second;

8) mill speed: 10-100000mm/ minute;

9) plate washer material: pottery;

10) annealing technology condition: temperature is 0.4-0.95 a times of low-melting-point metal fusing point in the composite wood;

11) annealing time is 10-300 minute.

2, the method for preparing metallic composite according to claim 1 is characterized in that:

Metal charge is copper and copper alloy, aluminium and aluminium alloy, titanium or titanium alloy, magnesium and magnesium alloy, carbon steel and stainless steel or noble metal.

3, the method for preparing metallic composite according to claim 1 is characterized in that:

Metal charge is 1Cr18Ni9Ti stainless steel, Q235 steel, TC4 titanium alloy, 6061 aluminium alloys, MB7 magnesium alloy or H68 copper alloy.

4, according to claim 1 or the 2 or 3 described methods that prepare metallic composite, it is characterized in that: rolling is with two roller vertical mills.

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