# US 12,214,440 B1 · Magnesium/titanium composite plate with large thickness ratios and gradient heterothermal rolling bonding method

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- Number: US 12,214,440 B1
- Document ID: US12214440B1
- Status: Granted
- Kind: B1
- Application number: 18/612,255
- Filed: 2024-03-21
- Published: 2025-02-06
- Granted: 2025-02-04
- Earliest claimed: 2023-07-31
- Assignees: Taiyuan University of Technology
- Applicants: Taiyuan University of Technology
- Inventors: Jianchao Han; Junxin Wei; Shuaishuai Zhang; Zhenhao Yuan; Yizhi Zhang; Ran Li; Xinxin Liu; Yi Jia; Tao Wang
- Web page: https://patentgrep.com/patent/US12214440B1

## CPC

- B23K 20/04: by means of a rolling mill
- B23K 20/16: with interposition of special material to facilitate connection of the parts, e.g. material for absorbing or producing gas
- B23K 20/2333: {one layer being aluminium, magnesium or beryllium}
- B23K 20/24: Preliminary treatment
- B23K 2101/18: Sheet panels
- B23K 2101/34: Coated articles {; Surface treated articles}
- B23K 2103/14: Titanium or alloys thereof
- B23K 2103/15: {Magnesium or alloys thereof}
- Y02P 10/25: Process efficiency
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A magnesium/titanium composite plate with large thickness ratios and a gradient heterothermal rolling bonding method are provided by the present disclosure, relating to the technical field of rolling bonding plates. The method includes following steps: assembling blanks according to a sequence of titanium strip, transition layer foil and magnesium alloy plate to obtain a composite blank; carrying out induction heating treatment on one side of the titanium strip of the composite blank, then rolling, and carrying out heat treatment on a composite plate blank after rolling to obtain the magnesium/titanium composite plate with large thickness ratios; and a thickness ratio of the magnesium alloy plate to the titanium strip is greater than or equal to 20:1.

## Claims

### Claim 1

A preparation method of a magnesium/titanium composite plate, comprising following steps:
assembling blanks according to a sequence of a titanium strip, a transition layer foil and a magnesium alloy plate to obtain a composite blank;
carrying out an induction heating treatment on one side of the titanium strip of the composite blank, and then rolling, and carrying out a heat treatment on a composite plate blank after rolling to obtain the magnesium/titanium composite plate;
a thickness ratio of the magnesium alloy plate to the titanium strip is greater than or equal to 20:1;
the titanium strip, the transition layer foil and the magnesium alloy plate are respectively subjected to an annealing treatment before the assembling, specifically, the titanium strip is held at 900-1000° C. for 60-90 min, the transition layer foil is held at 300-400° C. for 5-15 min, and the magnesium alloy plate is held at 300-400° C. for 30-60 min;
after the annealing treatment, the titanium strip, transition layer foil and magnesium alloy plate are further subjected to a step of surface treatment to remove oxide layers;
the transition layer foil is aluminum foil, zinc foil or aluminum-zinc alloy foil;
the induction heating treatment specifically comprises:
placing an induction heating coil on one side of the titanium strip of the composite blank to make the induction heating coil parallel to the composite blank, adjusting a distance between the induction heating coil and the composite blank to be 3-10 mm, and setting a heating temperature of heating the composite blank to be 400-600° C. for 15-150 s;
a rolling reduction is 15-20% and a rolling speed is 0.5-1.0 m/s;
a heterothermal rolling device for the preparation method of the magnesium/titanium composite plate comprises a guide rail support, two sides of the guide rail support are fixedly connected with a two-roll mill, a coil lifting device is fixedly connected to a feeding side of the two-roll mill and a top surface of one end of the guide rail support, the guide rail support is located between bottom ends of the two-roll mill, and the feeding side of the two-roll mill is correspondingly arranged with a discharging end of the coil lifting device.

### Claim 2 (depends on 1)

The preparation method according to claim 1, wherein the heat treatment specifically comprises holding at 400-500° C. for 60-90 min.

### Claim 3 (depends on 1)

The preparation method according to claim 1, wherein a thickness of the magnesium alloy plate is 8-20 mm, a thickness of the titanium strip is 0.1-0.3 mm, and a thickness of the transition layer foil is 0.02-0.1 mm.