阅读说明：本技术 一种钛钢层状复合薄卷制备方法 (Preparation method of titanium steel layered composite thin coil ) 是由 武晓燕 江海涛 米振莉 吴彦欣 *** 于 2020-05-27 设计创作，主要内容包括：本发明公开了一种钛钢层状复合薄卷的制备方法。重点包括以下工艺步骤：首先采用对称叠合方式组合钢板和钛板,其中钢板占比70％～90％；采用搅拌摩擦焊工艺焊合并固定钛钢复合坯料四周,将复合坯料送入真空室,在高温(700～1000℃)、高压(10～50MPa)作用下实现组合坯料的真空扩散焊合；将坯料放入加热炉中加热至800～1000℃,除磷后进入可逆粗轧机中热轧；其中热轧前期采用高温大压下工艺,通过热轧获得4～25mm厚的钛钢层状复合热轧卷；空冷后进入冷轧工序,将钛钢层状复合卷轧制呈钛钢层状复合薄卷,冷轧阶段总压下率为60％～90％,钛钢复合薄卷厚度为0.5～2.0mm。最终获得表面质量高,强度、塑性好,耐蚀、超薄的钛钢复合卷。(The invention discloses a preparation method of a titanium steel layered composite thin coil. The key points are that the method comprises the following process steps: firstly, combining a steel plate and a titanium plate in a symmetrical overlapping mode, wherein the steel plate accounts for 70% -90%; welding and fixing the periphery of the titanium steel composite blank by adopting a friction stir welding process, conveying the composite blank into a vacuum chamber, and realizing vacuum diffusion welding of the combined blank under the action of high temperature (700-1000 ℃) and high pressure (10-50 MPa); putting the blank into a heating furnace, heating to 800-1000 ℃, removing phosphorus, and then, hot rolling in a reversible roughing mill; wherein the hot rolling earlier stage adopts a high-temperature high-pressure process, and a titanium steel layered composite hot rolled coil with the thickness of 4-25 mm is obtained through hot rolling; and after air cooling, performing a cold rolling process, rolling the titanium steel laminated composite coil into a titanium steel laminated composite thin coil, wherein the total reduction rate in the cold rolling stage is 60-90%, and the thickness of the titanium steel laminated composite thin coil is 0.5-2.0 mm. Finally, the titanium steel composite coil with high surface quality, good strength and plasticity, corrosion resistance and ultrathin thickness is obtained.)

1. The preparation method of the titanium steel layered composite thin coil is characterized by comprising the following steps of:

firstly, removing oxide layers and stains on the surfaces of titanium plate blanks and steel plate blanks by adopting a laser cleaning process, and combining and fixing the titanium steel composite blanks by adopting a symmetrical stacking combination mode;

secondly, welding the peripheries of the blanks together by adopting a friction stir welding process, conveying the titanium steel composite blank into a vacuum chamber, and realizing vacuum diffusion welding of the titanium steel composite blank under the action of high temperature and high pressure;

thirdly, putting the titanium steel composite blank into a heating furnace for heating and heat preservation, and after the temperature is uniform, carrying out high-pressure water dephosphorization on the surface of the composite blank;

fourthly, placing the high-temperature dephosphorization composite blank into a rolling guide roller, carrying out hot rolling for 9 times in a reversible roughing mill, and obtaining a titanium steel layered composite hot-rolled coil by adopting a high-temperature high-pressure process in the early stage of rolling;

and fifthly, after cooling at room temperature, performing finish rolling on the titanium steel laminated composite hot rolled coil by adopting a cold rolling process to obtain the titanium steel laminated composite thin coil.

2. The method for preparing the titanium steel layered composite thin coil as claimed in claim 1, wherein in the first step, the titanium plate is a hot rolled plate, wherein the titanium plate material comprises TA0, TA2, TA3, TA5, TA6, TA7, TA9 and TA10, and the plate thickness is 5-20 mm.

3. The method for preparing the titanium steel layered composite thin coil as claimed in claim 1, wherein in the first step, the steel plate is a hot rolled plate, and the thickness of the plate is 50-200 mm.

4. The method for preparing the titanium steel laminated composite thin coil as claimed in claim 1, wherein in the first step, the steel plate and the titanium plate are placed in a symmetrical stacking combination manner in the titanium steel composite blank, and the thickness of the steel plate is 70% -90% of that of the titanium plate.

5. The method for preparing the titanium steel layered composite thin coil as claimed in claim 1, wherein in the second step, the titanium steel composite blank is vacuumized in a vacuum chamber, and vacuum diffusion welding of the titanium steel composite blank is realized under the action of high temperature of 700-900 ℃ and high pressure of 10-50 MPa.

6. The method for preparing the titanium steel layered composite thin coil as claimed in claim 1, wherein in the third step, the heating temperature of the titanium steel composite blank in the heating furnace is 800-1100 ℃.

7. The method for preparing the titanium steel layered composite thin coil as claimed in claim 1, wherein in the fourth step, in the rough rolling process, the rolling process of the first 4 times of high temperature and high pressure is adopted, the reduction rate of each time is 10% -15%, and the total reduction rate after the four times of rolling is 60-70%.

8. The method for preparing the titanium steel layered composite thin coil as claimed in claim 1, wherein in the fourth step, after the rough rolling is completed, the thickness of the titanium steel layered composite thin coil is 4-25 mm.

9. The method for preparing the titanium steel layered composite thin coil as claimed in claim 1, wherein in the fifth step, 7 passes of rolling are performed in the cold rolling process, the reduction of each pass is 5-10%, and the total rolling reduction is 60-90%.

10. The method for preparing the titanium steel layered composite thin coil as claimed in claim 1, wherein in the fifth step, after the cold rolling is completed, the thickness of the titanium steel layered composite thin coil is 0.5-2.0 mm.

Technical Field

The invention belongs to a plate coil processing technology, and relates to a preparation method of a titanium steel layered composite thin coil.

Background

The titanium steel composite material is a composite board prepared by combining titanium with good corrosion resistance and high-strength steel with low price, has excellent corrosion resistance, high strength and certain plasticity, can greatly reduce the production cost of products, and has wide application prospect in the fields of chemical engineering, ocean engineering, electric power and the like.

With the continuous development of the petrochemical industry, the demand of ultra-thin titanium steel laminated composite coils is increasing, but the immature production and preparation process becomes one of the reasons for restricting the application of titanium steel composite materials. And the effective bonding strength of the titanium and the iron is restricted due to different lattice structures of the titanium and the iron. At present, the problems of complex processing technology, high cost, poor quality of titanium steel composite plate coils, Ti-C, Ti-Fe intermetallic compounds and substandard composite plate thickness still exist in the production of titanium steel composite plate coils.

Disclosure of Invention

The invention provides a preparation method of a titanium steel layered composite thin coil, aiming at the problem that the size, the structure and the performance of the titanium steel composite coil do not reach the standard.

The invention is realized by the following technical scheme for preparing the titanium steel composite thin coil.

The preparation method of the titanium steel layered composite thin coil is characterized by comprising the following steps of:

firstly, removing oxide layers and stains on the surfaces of titanium plate blanks and steel plate blanks by adopting a laser cleaning process, and combining and fixing the titanium steel composite blanks by adopting a symmetrical stacking combination mode;

secondly, welding the peripheries of the blanks together by adopting a friction stir welding process, conveying the titanium steel composite blank into a vacuum chamber, and realizing vacuum diffusion welding of the titanium steel composite blank under the action of high temperature and high pressure;

thirdly, putting the titanium steel composite blank into a heating furnace for heating and heat preservation, and after the temperature is uniform, carrying out high-pressure water dephosphorization on the surface of the composite blank;

fourthly, placing the high-temperature dephosphorization composite blank into a rolling guide roller, carrying out hot rolling for 9 times in a reversible roughing mill, and obtaining a titanium steel layered composite hot-rolled coil by adopting a high-temperature high-pressure process in the early stage of rolling;

and fifthly, after cooling at room temperature, performing finish rolling on the titanium steel laminated composite hot rolled coil by adopting a cold rolling process to obtain the titanium steel laminated composite thin coil.

Further, in the first step, the titanium plate is a hot rolled plate, wherein the titanium plate comprises TA0, TA2, TA3, TA5, TA6, TA7, TA9 and TA10, and the plate thickness is 5-20 mm.

Further, in the first step, the steel plate is a hot rolled plate, and the thickness of the plate is 50-200 mm;

further, in the first step, in the titanium steel composite blank, the steel plate and the titanium plate are placed in a symmetrical stacking combination mode, and the thickness of the steel plate is 70% -90% of that of the titanium plate.

Further, in the second step, the titanium steel composite blank is vacuumized in a vacuum chamber, and vacuum diffusion welding of the titanium steel composite blank is realized under the action of high temperature of 700-900 ℃ and high pressure of 10-50 MPa.

Further, in the third step, the heating temperature of the titanium steel composite blank in the heating furnace is 800-1100 ℃.

Further, in the fourth step, in the rough rolling process, the rolling process of the first 4 times of high-temperature large reduction is adopted, the reduction rate of each time is 10% -15%, and the total reduction rate after the four times of rolling is finished is 60-70%.

Further, in the fourth step, after the rough rolling is finished, the thickness of the titanium steel composite coil is 4-25 mm.

Further, in the fifth step, in the cold rolling process, 7 passes of rolling are performed, the reduction of each pass is 5% -10%, and the total reduction rate is 60% -90%.

Further, in the fifth step, after the cold rolling is finished, the thickness of the titanium steel composite coil is 0.5-2.0 mm.

The invention provides a preparation method of a titanium steel layered composite thin coil, which has the advantages that compared with the prior art:

firstly, the titanium steel composite blanks are connected together through friction stir welding and vacuum diffusion welding processes, and intermetallic compounds such as Ti-Fe, Ti-C and the like which are unfavorable to material performance are prevented from being generated in the blank connection process in a fusion welding connection mode.

In the invention, in the early stage of the hot rolling stage, namely the rough rolling stage, the deformation of the titanium-steel composite plate adopts high temperature and high pressure deformation to ensure higher bonding strength of titanium and steel;

thirdly, in the invention, the titanium steel composite sheet with the thickness of 0.5 mm-2 mm is prepared by adopting a rolling process flow combining hot rolling and cold rolling, the process is simple, and the sheet quality is high.

Drawings

FIG. 1 is a schematic view of a titanium steel composite blank assembly according to an embodiment of the present invention;

FIG. 2 is a schematic view of a rolling process flow according to an embodiment of the present invention.

In the figure: 1-1 is a steel plate, and 1-2 is a titanium plate.

Detailed Description

The following examples illustrate the invention in detail: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.