CN201385171Y - Solid-solid phase continuous brazing and rolling device for stainless steel clad plate - Google Patents

Abstract

The utility model discloses a solid-solid phase continuous brazing and rolling device for stainless steel composite plates. The device can continuously produce single-sided or double-sided stainless steel composite plates. The device provided by the utility model comprises: a base strip uncoiler, a solder sprayer, a drying box, a stainless steel strip uncoiler, an inlet pinch roller, an inlet sealing roller, a front cooling water pipe, a protective gas inlet and a valve, Insulation layer, heating element, protective gas box, rolling mill, post-cooling water pipe, outlet sealing roller, stainless steel composite plate crimping machine, protective gas outlet valve, temperature measuring thermocouple. Compared with the existing production device, the rolling mill adopted by the utility model has small scale, simple heating device, and less equipment investment; the raw material used is ordinary hot-rolled coil or cold-rolled coil, which has high production efficiency, high output, and high yield. High rate; the combination between the cladding plate and the base plate is pressed by the rolling pressure of the rolling mill in a hot state, the compounding rate is high, and the quality of the finished product is good.

Description

Solid-solid phase continuous brazing and rolling device for stainless steel clad plate

technical field

The utility model relates to a metal composite material production device, in particular to a solid-solid phase continuous brazing and rolling device for stainless steel composite plates.

Background technique

Stainless steel is widely used because of its good stainless and corrosion resistance properties, but its price remains high due to the high proportion of rare and precious metals such as nickel and chromium contained in stainless steel. In recent years, due to the soaring nickel price, the price of 300 series stainless steel with higher nickel content has risen again and again. Therefore, the development of stainless steel substitute products has become the focus of material researchers around the world. Stainless steel composite plates are usually made of stainless steel as the surface material, ordinary low-carbon steel or other alloy materials as the base material, and are combined into one by a certain connection method to form a multi-layer composite plate with different materials. It has both stainless steel and other alloy materials. The advantages of stainless steel have the incomparable advantages of pure stainless steel with the same specification in terms of price. Therefore, stainless steel composite plates have been highly valued by people since their birth.

At present, the solid-solid phase composite equipment for producing stainless steel clad plates mainly includes rolling mills, vacuum equipment, protective atmosphere brazing furnaces, diffusion annealing furnaces, etc. Among them, the rolling mill, vacuum equipment and diffusion annealing furnace are all ordinary two-roll or four-roll rolling mills, vacuum equipment and ordinary diffusion annealing furnace, and the protective atmosphere brazing furnace is a heating furnace with a protective atmosphere that can apply pressure to the billet. furnace. The hearth structure of this heating furnace is basically the same as that of ordinary heating furnaces, except that a number of hydraulic cylinders are set on the top of the hearth, which can exert pressure on the billet in the heated state, so as to weld stainless steel and ordinary carbon steel in the heated state together. Due to the large contact area, even when the unit pressure is not high, the total pressure to be applied is very large, which increases the complexity of the equipment and the construction cost of the furnace. In addition, it may cause uneven pressure, resulting in failure to recombine at local positions and forming defects. In addition, after compounding, it is necessary to use ordinary wide and thick plate rolling mills or hot tandem rolling units to roll them into thinner products. Therefore, wide and thick plate rolling mills or hot tandem rolling units are also required, which increases the difficulty of operation and equipment investment. The invention provides a device for continuously brazing and rolling a hot-rolled coil to produce a stainless steel clad plate after studying the brazing and rolling connection and deformation law of ordinary carbon steel/stainless steel in a protective atmosphere.

Utility model content

The purpose of the utility model is to provide a device for continuously brazing and rolling stainless steel clad plates using hot-rolled coils as raw materials. With this device, ordinary hot-rolled coils can be used as raw materials, and continuous high-efficiency, low-cost, and high-quality Produce single-sided or double-sided stainless steel composite panels.

The solid-solid phase continuous brazing and rolling device for stainless steel composite plates provided by the utility model includes: a substrate strip steel uncoiler, a solder sprayer, a drying box, a stainless steel strip uncoiler, an inlet pinch roller, an inlet sealing roller, Front cooling water pipe, protective gas inlet and valve, insulation layer, heating element, protective gas box, rolling mill, rear cooling water pipe, outlet sealing roll, stainless steel composite plate coiler, protective gas outlet and valve, temperature measuring thermocouple.

The base strip uncoiler and the stainless steel strip uncoiler mentioned above are all existing ordinary uncoilers, which are staggered up and down during installation, the solder sprayer is placed above the base strip, and the drying box is placed behind the solder sprayer , the inlet pinch roller is placed behind the drying box, the inlet sealing roller and the outlet sealing roller are located at both ends of the protective gas box, the front cooling water pipe is made of copper flat tube, and it is wrapped around the protruding part of the protective gas box after the inlet sealing roller On the surface, the protective gas inlet and valve are located behind the front cooling water pipe. The insulation layer is wrapped around the heating section of the protective gas box with commonly used thermal insulation cotton. The heating element is ordinary metal resistance band or resistance wire or graphite heating band. The pair is installed in the heating section of the protective gas box. The protective gas box is composed of the heating section box, the rolling section box and the cooling section box. The heating section box is made of heat-resistant alloy steel plates. Its cross-sectional shape is made into Circular or elliptical or rectangular, the box of the rolling section is welded by stainless steel, which is a box-shaped structure, the box of the cooling section is welded by ordinary steel, and its section shape is made into a circle or rectangle, and the inside of the box is filled with ammonia Decompose the protective gas. The rolling mill is a two-roll or four-high rolling mill. The two working rolls of the rolling mill are cooled by water inside. The whole rolling mill except the transmission system is placed in the rolling section box of the protective gas box. The roll neck of the rolling mill passes through The side wall of the rolling section of the protective gas box is sealed with a labyrinth seal. The rear cooling water pipe is made of copper flat pipe, which is wound around the outer part of the cooling section of the protective gas box. The protective gas outlet and valve are located behind the cooling section box, and the crimper is located behind the outlet sealing roller.

The beneficial effects of the utility model are mainly reflected in:

(1) Compared with the existing solid-solid phase composite device for producing stainless steel clad plates, the rolling mill adopted in the present invention is small in scale, simple in heating device, and less in equipment investment;

(2) The raw materials used in the utility model are common hot-rolled coils or cold-rolled coils, brazing and rolling are completed in a continuous instant in a protective gas box, so the production efficiency is high, the output is high, and the yield is high ;

(3) The combination between the cladding plate and the base plate is pressed by the rolling pressure of the rolling mill in a hot state, so the average unit pressure between the composite interfaces is large, the pressure on the interface is uniform, the bonding strength is high, and the composite rate is high. , the quality of the finished product is good;

(4) The rolling mill in the protective gas box described in the utility model is equipped with an internal water-cooled roll, and the temperature of the roll body can be controlled by adjusting the water pressure and water volume.

Description of drawings

Figure 1 is a schematic diagram of solid-solid phase continuous brazing and rolling equipment for stainless steel clad plates. The meanings of the marks in the figure are as follows: 1 base strip uncoiler; 2 solder sprayer; 3 drying box; 4 stainless steel strip uncoiler; 5 entrance pinch roller; Gas inlet and valve; 9 insulation layer; 10 heating element; 11 protective gas box; 12 rolling mill; 13 post-cooling water pipe; 14 outlet sealing roller; .

Detailed ways

The utility model is specifically described below with an embodiment, which is only an application example of the utility model, and cannot be interpreted as limiting the protection scope of the claims of the utility model.

As shown in Figure 1, the solid-solid phase continuous brazing and rolling device for stainless steel clad plates provided by the utility model includes: substrate strip steel uncoiler 1, solder sprayer 2, drying box 3, stainless steel strip uncoiler 4 , entrance pinch roll 5, entrance sealing roll 6, cooling water pipe 7, protective gas inlet valve 8, insulation layer 9, heating element 10, protective gas box 11, rolling mill 12, cooling water pipe 13, exit sealing roll 14, stainless steel composite plate Crimp machine 15, protective gas outlet valve 16, temperature measuring thermocouple 17.

Above-mentioned substrate strip steel uncoiler 1, stainless steel strip uncoiler 4 are existing common uncoilers, staggered mutually up and down during installation, spaced a certain distance simultaneously, so that solder sprayer 2 and drying box 3 are installed. The brazing filler metal sprayer 2 is placed on the top of the base strip steel to ensure that the powder brazing filler metal is evenly sprayed on the strip steel surface. The drying box 3 is placed behind the solder sprayer 2, so as to quickly dry the sprayed solder; the entrance pinch roll 5 is placed behind the drying box 3, and the base strip and the stainless steel strip are combined, and combined with the rolling mill Tension tension is established between 12 to ensure that the strip steel is in a horizontal state. The inlet sealing roller 6 and the outlet sealing roller 14 are located at both ends of the shielding gas box 11 to seal the gas in the shielding gas box 11 . The front cooling water pipe 7 adopts a copper flat tube, which is wound on the surface of the protruding part of the protective gas box behind the entrance sealing roller 6 to cool the box near the entrance sealing roller 6 . The protective gas inlet and the valve 8 are located behind the cooling water pipe 7, so that the protective gas is introduced into the protective gas box to prevent oxidation of the strip surface during heating. The insulation layer 9 is wrapped around the heating section of the protective gas box 11 with commonly used insulation cotton to ensure that the strip steel is heated to the temperature required for brazing; Material melting temperature, this temperature can be monitored by temperature measuring thermocouple 17. The protective gas box 11 is composed of a heating section box, a rolling section box and a cooling section box. The total length of the box is 12-30m. The heating section box is made of Ni25Cr20 heat-resistant alloy steel plate welded. It is 7~18m, and its section shape is made into an oval shape. The rolling section box is welded by 304 stainless steel, which is a box-shaped structure. The cooling section box is made of Q235 ordinary steel welded, and its section shape is made into a rectangle. The inside of the body is filled with ammonia decomposition protective gas to prevent oxidation of the strip surface during heating. Rolling mill 12 is composed of two two-roll mills. The two work rolls of each mill need to be cooled by water. The rolls perform rolling, pressing and cooling on the combined strip steel. The whole mill except the transmission system is placed in the protective gas box. In the box of the rolling section, the roll neck of the rolling mill passes through the side wall of the box of the rolling section of the protective gas box, and is sealed with a labyrinth sealing ring. The post-cooling water pipe 13 adopts a copper flat tube, which is wound around the peripheral extension of the cooling section of the protective gas box to cool the box and the composite board. The protective gas outlet and valve 16 are located behind the cooling section box, and the oxidizing gas remaining in the protective gas box 11 is cleaned by releasing gas. The crimping machine 15 is located behind the exit sealing roller 14, and rolls the clad stainless steel clad plate into a coil.

Claims (4)

1. A solid-solid phase continuous brazing and rolling device for stainless steel clad plates, characterized in that the device comprises: matrix strip steel uncoiler, solder sprayer, oven, stainless steel strip uncoiler, entrance pinch roll , Entrance sealing roller, front cooling water pipe, protective gas inlet and valve, insulation layer, heating element, protective gas box, rolling mill, post cooling water pipe, outlet sealing roller, stainless steel composite plate coiling machine, protective gas outlet and valve, temperature measuring thermoelectric Even, the base strip uncoiler and the stainless steel strip uncoiler are all existing common uncoilers, which are staggered up and down during installation, the solder sprayer is placed above the base strip, and the drying box is placed on the solder sprayer After that, the inlet pinch roller is placed behind the drying box, the inlet sealing roller and the outlet sealing roller are located at both ends of the protective gas box, and the front cooling water pipe is made of copper flat tube, which is wrapped around the protruding part of the protective gas box behind the inlet sealing roller The protective gas inlet and valve are located behind the front cooling water pipe. The insulation layer is wrapped with commonly used thermal insulation cotton around the heating section of the protective gas box. The heating element uses ordinary metal resistance bands or resistance wires or graphite heating bands. The thermocouple is installed in the heating section of the protective gas box. The protective gas box is composed of the heating section box, the rolling section box and the cooling section box. The heating section box is welded by heat-resistant alloy steel plates, and its cross-sectional shape is made It is circular, oval or rectangular. The box body of the rolling section is welded by stainless steel, which is a box-shaped structure. The box body of the cooling section is welded by ordinary steel, and its cross-sectional shape is made into a circle or rectangle. Ammonia decomposes protective gas. The rolling mill is a two-roll or four-high rolling mill. The two working rolls of the rolling mill are cooled by water. The whole rolling mill except the transmission system is placed in the rolling section of the protective gas box. The roll necks of the rolling mill wear The side wall of the rolling section of the protective gas box is sealed with a labyrinth seal ring, and the rear cooling water pipe is made of copper flat tubes, which are wound around the outer extension of the cooling section of the protective gas box. The protective gas outlet and valve are located in the cooling zone. After the section box, the crimper is located after the exit sealing roll. 2. The solid-solid phase continuous brazing and rolling device of stainless steel clad plate according to claim 1, characterized in that the section shape of the box body in the heating section of the shielding gas box is made into an ellipse, and the section shape of the box body in the cooling section is Make it into a rectangle. 3. The solid-solid phase continuous brazing and rolling device for stainless steel clad plates according to claim 1, characterized in that said heating element is a common resistance wire. 4. The solid-solid phase continuous brazing and rolling device for stainless steel clad plates according to claim 1, characterized in that said rolling mill is a two-roll rolling mill.

Images