Processing method of roughened stainless steel strip

Abstract

The present invention provides a method for processing a textured stainless steel strip, comprising: using a 0.8-1.3 mm cold-rolled stainless steel strip to perform multiple rough rolling to obtain a rough-rolled strip, at least one of the multiple rough rolling passes uses a first texture roller; cleaning the rough-rolled strip and then annealing it at high temperature; performing multiple finish rolling on the rough-rolled strip after high temperature annealing to obtain a finished strip, at least the first and last two passes of the multiple finish rolling use a second texture roller; cleaning the finished strip and then bright annealing it; drawing and straightening the finished strip after bright annealing to obtain a finished strip, the inlet and outlet of the drawing and straightening use a third texture roller; wherein the first texture roller, the second texture roller and the third texture roller are all obtained by surface texturing the roller to be processed by a roller surface texturing device. The method for processing a textured stainless steel strip provided by the present invention can improve the uniformity of texturing treatment and the scratch problem of stainless steel strip.

Description

Technical Field

[0001] The invention belongs to the technical field of stainless steel strip processing, and in particular relates to a method for processing a textured stainless steel strip. Background Art

[0002] The surface treatment of stainless steel strip is usually divided into two types: mirror surface and rough surface. The mirror surface of stainless steel strip is smooth and lustrous, while the rough surface of stainless steel strip is rough and has good adsorption. Different surface treatment methods are applicable to different fields and uses. For the rough surface stainless steel strip, the processing method is to use the roughened roller to flatten the stainless steel strip after cold rolling, which is equivalent to the rough surface transfer method.

[0003] The roughened stainless steel strips are generally processed with the current technology with roughening uniformity problems, and the roughening uniformity of the strip surface is closely related to the roughening quality of the roller wall. At present, whether it is sandblasting or laser roughening, the industry has continuously optimized and improved the process parameters, but the roughening uniformity of the roller wall still cannot achieve the expected effect, thus restricting the improvement of the surface quality of the roughened stainless steel strips; in addition, due to the relative sliding friction between the surface of the stainless steel strip and the roughened roller during the flattening process, continuous scratches appear on the surface of the stainless steel strip, which in turn changes the roughened surface from the expected point cloud appearance to a line type, which greatly affects the quality of the roughened surface and needs to be solved urgently. Summary of the invention

[0004] The embodiment of the present invention provides a method for processing a textured surface stainless steel strip, aiming to improve the surface texture quality of the textured surface stainless steel strip.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a method for processing a textured stainless steel strip, comprising:

[0006] A 0.8-1.3 mm cold-rolled stainless steel strip is subjected to multiple rough rolling to obtain a rough-rolled strip steel, wherein at least one intermediate pass of the multiple rough rolling uses a first texturing roller;

[0007] The rough rolled strip is cleaned and then annealed at high temperature;

[0008] The rough-rolled steel strip after high-temperature annealing is subjected to multiple passes of finish rolling to obtain a finished steel strip, wherein at least the first and last passes of the multiple passes of finish rolling use a second texturing roller;

[0009] The finished rolled strip is cleaned and bright annealed;

[0010] The finished strip steel after bright annealing is subjected to drawing and straightening to obtain the finished strip steel, and the inlet and outlet of the drawing and straightening are both equipped with the third texturing roller;

[0011] The first textured roller, the second textured roller and the third textured roller are all obtained by texturing the surface of the roller to be processed by the roller surface texturing device.

[0012] In combination with the first aspect, in a possible implementation, the roller surface texturing device includes:

[0013] A frame, used for horizontally loading the roll to be processed, a rotating driving member is provided on the frame, and an output end of the rotating driving member is used for connecting the roll to be processed and driving the roll to be processed to rotate;

[0014] A feeding assembly is arranged on the frame and has a feeding end that moves along the axial direction of the roll to be processed;

[0015] A sandblasting machine is arranged on the side of the frame, and a spray gun of the sandblasting machine is connected to the feed end and sprays sand toward the surface of the roller to be processed;

[0016] A shielding plate is connected to the spray gun or the feed end and is located between the nozzle of the spray gun and the peripheral wall of the roll to be processed. The shielding plate has two shielding boundaries, which are spaced apart along the axial direction of the roll to be processed, and a sandblasting channel is formed between the two shielding boundaries;

[0017] When the roller to be processed rotates one circle, the positive integer multiple of the feeding distance of the spray gun is equal to the horizontal width of the sandblasting channel.

[0018] In some embodiments, the feed speed V2 of the spray gun is (L×V1) / (π×D×N); V1 is the linear speed of the roller to be processed; L is the horizontal width of the sandblasting channel; D is the diameter of the roller to be processed; and N is a positive integer.

[0019] In some embodiments, the shielding boundary is tilted and forms an angle A with the feeding direction of the spray gun, where A=90°+arctan(V2 / V1).

[0020] Exemplarily, the distance from the abrasive material sprayed from the nozzle to the peripheral wall of the roller to be processed is 22-38 mm, and the normal angle between the abrasive material sprayed from the nozzle and the roller to be processed is 32°-42°.

[0021] For example, the nozzle is an oblate nozzle, and the long axis of the nozzle is arranged along the axial direction of the roller to be processed, the long axis size of the nozzle is 8.8-16.8 mm, and the short axis size of the nozzle is 1.8-3.2 mm; the blasting air pressure of the sandblasting machine is 0.52-0.73 MPa.

[0022] In a possible implementation, the surface roughness Ra1 of the first texture roller is 0.07-0.12 μm, the surface roughness Ra2 of the second texture roller is 0.09-0.14 μm, and the surface roughness Ra3 of the third texture roller is 0.05-0.1 μm.

[0023] Exemplarily, the number of passes of the multi-pass rough rolling is 7 to 9, the total reduction ratio is 70% to 80%, and smooth rollers are used in the first and last passes of the multi-pass rough rolling.

[0024] For example, the number of passes of the multi-pass finishing rolling is 4 to 6, the total reduction rate is 50% to 60%, and the second texturing roll is used in each pass of the multi-pass finishing rolling.

[0025] In some embodiments, the surface roughness of the roller to be processed is Ra0≤0.05 μm.

[0026] The beneficial effect of the method for processing a textured stainless steel strip provided by the present invention is that, compared with the prior art, the method for processing a textured stainless steel strip provided by the present invention can roughen the surface of the rough-rolled strip by using a first textured roller in at least one intermediate pass of a plurality of rough rolling passes of a cold-rolled stainless steel strip blank, and then carry out a plurality of finish rolling passes after high-temperature annealing, and the contact force between the rough-rolled strip and the finish rolling roller can be increased by using the textured surface, thereby avoiding scratches caused by relative sliding between the surface of the rough-rolled strip and the finish rolling roller, and at the same time, at least the first and last two passes of the plurality of finish rolling passes are rolled by using a second textured roller, thereby making it possible to The finished strip obtains a roughened surface, and bright annealing is used to improve the smoothness of the roughened surface of the finished strip, and finally the finished strip is obtained through drawing and straightening. Since the third roughening roller is used at the inlet and outlet of the drawing and straightening, the contact force between the third roughening roller and the roughened surface of the finished strip can be improved during the drawing and straightening process, thereby avoiding relative sliding between the roughened surface of the finished strip and the third roughening roller during the drawing and straightening process to produce scratches, thereby improving the surface quality of the finished product. Since the final finished strip has undergone three roughening treatments in succession, the uniformity of the surface roughening treatment of the finished strip can be improved, and the quality of the roughened surface can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A surface microscopic image of a textured stainless steel strip obtained by the textured stainless steel strip processing method provided in an embodiment of the present invention;

[0028] Figure 2 To obtain the surface microscopic image of the roughened stainless steel strip by using the existing process;

[0029] Figure 3 A schematic diagram of the three-dimensional structure of a roller surface texturing device used in an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of the three-dimensional structure of a shielding plate and a spray gun used in an embodiment of the present invention;

[0031] Figure 5 It is a front view structural schematic diagram of surface roughening treatment of a roller to be treated according to an embodiment of the present invention;

[0032] Figure 6 for Figure 5 Schematic diagram of the side structure.

[0033] In the figure: 10, frame; 11, rotating drive member; 111, coupling; 12, guide rail; 13, slide seat; 131, U-shaped groove; 132, roller; 20, feed assembly; 21, connecting seat; 22, slide rod; 23, screw; 24, servo motor; 25, feed seat; 30, spray gun; 31, nozzle; 32, fixed block; 40, baffle plate; 41, shielding boundary; 42, sandblasting channel; 43, connecting rod; 50, roller to be processed. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] It should be noted that when an element is referred to as being "disposed on" or "connected to" another element, it may be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0036] Please also read Figures 1 to 6 The present invention provides a method for processing a textured stainless steel strip. The method for processing a textured stainless steel strip comprises:

[0037] Step S100, using a 0.8-1.3 mm cold-rolled stainless steel strip to perform multiple passes of rough rolling to obtain a rough-rolled strip steel, wherein at least one intermediate pass of the multiple passes of rough rolling uses a first texturing roller;

[0038] Step S200, cleaning the rough-rolled steel strip and then annealing it at high temperature;

[0039] Step S300, performing multiple passes of finish rolling on the rough-rolled steel strip after high-temperature annealing to obtain a finished steel strip, wherein at least the first and last two passes of the multiple passes of finish rolling use a second texturing roller;

[0040] Step S400, cleaning and bright annealing the finished steel strip;

[0041] Step S500, the finished steel strip after bright annealing is subjected to stretching and straightening to obtain a finished steel strip, and the inlet and outlet of the stretching and straightening are both provided with a third texturing roller;

[0042] The first textured roller, the second textured roller and the third textured roller are all obtained by texturing the surface of the roller 50 to be processed by the roller surface texturing device.

[0043] In this embodiment, both the multi-pass rough rolling and the multi-pass finish rolling are performed by a continuous rolling mill; wherein, at least one intermediate pass in the multi-pass rough rolling process is rolled by a first textured roller, and the first and subsequent passes of the first textured roller are smooth rollers, so that the rolling force of the smooth roller on the stainless steel strip can be used to form tension between the first textured roller, thereby avoiding scratches caused by relative sliding between the first textured roller and the surface of the stainless steel strip, or at least reducing the amount of dislocation between the first textured roller and the stainless steel strip, thereby shortening the scratches; On this basis, the rolling of the first texturing roller is conducive to homogenizing the internal stress of rough rolling, and accompanied by the continuous rolling of the stainless steel strip by the rolling rollers of each pass after the first texturing roller, the Rz value, that is, the micro-roughness, transferred from the first texturing roller to the surface of the stainless steel strip is reduced based on the reduction rate, thereby improving the flatness of the rough-rolled strip and blurring the possible shorter scratches. However, the texturing marks produced by the first texturing roller are not completely eliminated in the subsequent rough rolling passes, so the rough-rolled strip can still obtain a textured surface.

[0044] The hardness of the rough-rolled strip obtained after multiple passes of rough rolling increases. Therefore, the rough-rolled strip is subjected to high-temperature annealing before entering multiple passes of finishing rolling. On the one hand, the internal stress of the rough rolling is uniformed, which is beneficial to controlling the quality of the plate shape. On the other hand, the rough-rolled strip can be annealed and softened, thereby providing conditions for subsequent multiple passes of finishing rolling. Of course, in order to ensure surface cleanliness, the rough-rolled strip should be cleaned before high-temperature annealing.

[0045] The purpose of multi-pass finishing rolling is to roll the rough-rolled strip into a finished strip of target thickness. Specifically, the first and last passes of the multi-pass finishing rolling use a second roughening roller. Since the rough-rolled strip has a roughened surface, the second roughening roller and the rough-rolled strip can ensure sufficient static friction contact force based on their respective roughened surfaces, thereby avoiding relative sliding between the second roughening roller and the rough-rolled strip during the multi-pass finishing rolling process to cause dislocation and scratches, thereby forming the surface of the finished strip into a roughened surface with a point cloud distribution; in addition, it should be explained that the shorter scratches that may exist on the roughened surface of the rough-rolled strip can be covered by the point cloud during the roughening rolling of the rough-rolled strip by the second roughening roller, thereby almost completely eliminating the shorter scratches.

[0046] The purpose of bright annealing of the finished strip is to improve the surface finish and make the point cloud formed by the second texturing roller on the surface of the finished strip more rounded and smooth. Of course, the finished strip needs to be cleaned before bright annealing to avoid the presence of oil stains and particles on the surface of the finished strip during the bright annealing process, which may affect the surface appearance quality of the product. On this basis, the bright annealing treatment can soften the finished strip, thereby facilitating the subsequent re-texturing treatment of the textured surface of the finished strip by the third texturing roller.

[0047] The leveling process in this embodiment arranges a third texture roller at the inlet and outlet of the drawing and leveling type respectively, and can utilize the contact between the third texture roller and the textured surface of the finished steel strip to increase the static friction contact force between the two, thereby avoiding scratches caused by relative sliding dislocation between the third texture roller and the finished steel strip. In addition, the re-texturing of the surface of the finished steel strip by the third texture roller can make the point cloud distribution of the textured surface of the finished steel strip more uniform, thereby improving the quality of the textured surface of the finished steel strip.

[0048] For details, please compare Figure 1 and Figure 2 ,in, Figure 1 In order to obtain a microscopic image of a roughened stainless steel strip by using the roughened stainless steel strip processing method provided in this embodiment, Figure 2 Microscopic image of a roughened stainless steel strip obtained by using the existing process; by comparison, Figure 1 The roughened surface is in the form of a clear point cloud with only slight adhesion between points. Figure 2 There are a lot of transverse textures in the strip, which are caused by scratches caused by the relative slip dislocation between the texture roller and the strip surface during the texture treatment process. Therefore, the textured stainless steel strip processing method provided in this embodiment has a significant improvement effect on the textured surface.

[0049] Compared with the prior art, the method for processing a roughened stainless steel strip provided in the embodiment can roughen the surface of the rough-rolled strip by using a first roughening roller in at least one of the multiple rough-rolling passes of the cold-rolled stainless steel strip, and then carry out multiple finish rolling after high-temperature annealing. The roughened surface can improve the contact force between the rough-rolled strip and the finish rolling roller, thereby avoiding scratches caused by relative sliding between the surface of the rough-rolled strip and the finish rolling roller. At the same time, at least the first and last two passes of the multiple finish rolling are rolled with a second roughening roller, so that the finish-rolled strip can obtain a roughened surface, and Bright annealing is used to improve the roughening surface finish of the finished strip, and finally the finished strip is obtained through drawing and straightening. Since the third texturing roller is used at the inlet and outlet of the drawing and straightening process, the contact force between the third texturing roller and the roughening surface of the finished strip can be improved during the drawing and straightening process, thereby avoiding relative sliding between the roughening surface of the finished strip and the third texturing roller during the drawing and straightening process to produce scratches, thereby improving the surface quality of the finished product. Since the final finished strip has undergone three texturing treatments in succession, the surface roughening uniformity of the finished strip can be improved, and the quality of the roughened surface can be further improved.

[0050] In some embodiments, see Figures 3 to 6 The roller surface texturing device includes a frame 10, a feeding assembly 20, a sandblasting machine, and a shielding plate 40; the frame 10 is used to horizontally load the roller 50 to be processed, and a rotating driving member 11 is provided on the frame 10. The output end of the rotating driving member 11 is used to connect the roller 50 to be processed and drive the roller 50 to be processed to rotate; the feeding assembly 20 is arranged on the frame 10, and has a feeding end that moves along the axial direction of the roller 50 to be processed; the sandblasting machine is arranged on the side of the frame 10, and the spray gun 30 of the sandblasting machine is connected to the feeding end And sandblasting is performed toward the surface of the roller 50 to be processed; the baffle plate 40 is connected to the spray gun 30 or the feed end, and is located between the nozzle 31 of the spray gun 30 and the peripheral wall of the roller 50 to be processed, the baffle plate 40 has two shielding boundaries 41, the two shielding boundaries 41 are distributed along the axial direction of the roller 50 to be processed, and a sandblasting channel 42 is formed between the two shielding boundaries 41; wherein, when the roller 50 to be processed rotates one circle, the positive integer multiple of the feed distance of the spray gun 30 is equal to the horizontal width of the sandblasting channel 42.

[0051] While the roller 50 to be processed loaded on the frame 10 is driven to rotate by the rotary drive member 11, the feed assembly 20 drives the spray gun 30 connected to its feed end to perform horizontal feeding movement. By associating the rotation speed of the roller 50 to be processed with the feed speed of the feed end, the spray gun 30 can form a continuous spiral width on the peripheral wall of the roller 50 to be processed; specifically, the roller 50 to be processed rotates one circle, and the feed distance of the spray gun 30 is the horizontal width of the sandblasting channel 42, thereby making the adjacent circle boundaries of the spiral width connected along the axial direction of the roller 50 to be processed, so that each position of the peripheral wall of the roller 50 to be processed can be sandblasted once in the process of the spray gun 30 moving from one end of the roller 50 to be processed to the other end; of course, the roller 50 to be processed can be subjected to multiple reciprocating sandblasting processes, and the feed speed can be adjusted to half of the previous one. Even lower, it is sufficient as long as the feed speed satisfies the condition that the feed distance of the spray gun 30 is equal to the horizontal width of the sandblasting channel 42 when the roller 50 to be processed rotates one circle. For example, the roller 50 to be processed needs to be sandblasted twice. Then, when the roller 50 to be processed rotates one circle, twice the feed distance of the spray gun 30 is equal to the horizontal width of the sandblasting channel 42. Therefore, during the sandblasting process, when the spray gun 30 is fed from one end of the roller 50 to be processed to the other end, each position of the peripheral wall of the roller 50 to be processed is sandblasted twice, so that two sandblastings are completed in one feeding cycle; and so on, by matching the number of repeated sandblasting times with the feed speed, a single feeding cycle (the spray gun 30 is fed from one end of the roller 50 to be processed to the other end) can form multiple sandblastings at the same position of the roller 50 to be processed, thereby improving the spraying efficiency.

[0052] It should be explained here that the working principle of the sandblasting machine is to use compressed air to spray sand from the nozzle 31 of the spray gun 30 to act on the surface of the workpiece. The distance between the nozzle 31 and the surface of the workpiece, the inclination of the nozzle 31 relative to the surface of the workpiece, and the compressed air pressure are all directly related to the sandblasting effect. Considering that the sand gradually diverges in the process of being sprayed from the nozzle 31 to the surface of the roller 50 to be processed, that is, the sand beam sprayed from the nozzle 31 presents a cone with a gradually increasing cross-sectional area, and the edge of the sand beam is not a clear outline of a standard shape, the sand beam directly acts on the surface of the roller 50 to be processed, which will result in insufficient sandblasting uniformity at the edge of the spiral width, thereby affecting the overall sandblasting uniformity of the roller 50 to be processed, and further affecting the uniformity of the surface roughening treatment of the stainless steel strip. In order to avoid this situation, in this embodiment, a shielding plate 40 is set in front of the nozzle 31, and a hole or groove is opened in the shielding plate 40. Two shielding boundaries 41 are formed, and the sand material sprayed from the nozzle 31 acts on the surface of the roller 50 to be processed through the sand blasting channel 42 between the two shielding boundaries 41, while the uneven sand material located at the edge of the sand material beam is blocked by the shielding plate 40 and cannot act on the surface of the roller 50 to be processed. In this way, it can be ensured that the sand material beam sprayed by the nozzle 31 on the roller 50 to be processed forms a clear boundary contour. On this basis, the feed speed and the spiral width are adjusted according to the above-mentioned matching method, which can ensure the uniformity of sand blasting on the entire circumferential wall surface of the roller 50 to be processed, thereby improving the surface roughening treatment quality of the stainless steel strip.

[0053] For details, see Figure 3 and Figure 4 Two guide rails 12 are arranged in parallel on the frame 10, and two slides 13 are slidably connected to the two guide rails 12. A U-shaped groove 131 is opened on the top of the slide 13, and the shoulders of the two ends of the roller 50 to be processed are respectively embedded in the U-shaped grooves 131 of the two slides 13. The sliding slides 13 can meet the loading requirements of the rollers 50 to be processed of different lengths; further, in order to ensure the lightness and stability of the rotation of the roller 50 to be processed, the two slides 13 are surrounded by the lower semicircular arc wall of the U-shaped groove 131 and are respectively spaced apart with a plurality of rollers 132, and each roller 132 is respectively rollingly supported on the shoulders of the roller 50 to be processed.

[0054] In this embodiment, the output end of the rotary drive member 11 is connected to one end of the roller 50 to be processed through a coupling 111; the feed assembly 20 includes two connection seats 21 respectively connected to the two slide seats 13, two slide bars 22 are arranged between the two connection seats 21, and the two ends of the slide bar 22 are respectively slidably arranged in the two connection seats 21, and a lead screw 23 is arranged between the two slide bars 22, and the two ends of the lead screw 23 are slidably arranged in the two connection seats 21 and form a rotational fit with the connection seats 21. A servo motor 24 is arranged on the frame 10, and the output end of the servo motor 24 is connected to one end of the lead screw 23; a feed seat 25 is slidably connected to the two slide bars 22, and the lead screw 23 passes through the feed seat 25 to form a threaded fit with the feed seat 25, and the spray gun 30 is connected to the feed seat 25. The lead screw 23 is driven to rotate by the servo motor 24, thereby driving the feed seat 25 to slide along the slide bar 22 to realize the feeding movement of the spray gun 30, and the structure is simple and stable, and the movement accuracy is high.

[0055] In this embodiment, the outer walls of the two opposite sides of the axial direction of the spray gun 30 are respectively provided with fixing blocks 32, and the shielding plate 40 is an arc-shaped plate matching the roller diameter of the roller 50 to be processed, and two groups of connecting rods 43 are respectively penetrated and connected to the two fixing holes on the shielding plate 40. Here, connecting the shielding plate 40 to the spray gun 30 can ensure the relative stability between the shielding plate 40 and the spray gun 30, thereby ensuring that the relative position between the two shielding boundaries 41 and the nozzle 31 remains unchanged, so as to improve the shielding stability of the shielding plate 40 on the sand material beam during the sandblasting process. On this basis, the corresponding shielding plate 40 can be replaced for the rollers 50 to be processed with different roller diameters, thereby improving flexibility and adaptability.

[0056] For some possible implementations, see Figure 5 , the feed speed V2 of the spray gun 30 = (L×V1) / (π×D×N); V1 is the linear speed of the roller 50 to be processed; L is the horizontal width of the sandblasting channel 42; D is the diameter of the roller 50 to be processed; and N is a positive integer.

[0057] Specifically, N can also represent the number of times the surface of the roller 50 to be processed needs to be repeatedly sandblasted, or the number of times the nozzle 31 passes the same position of the peripheral wall of the roller 50 to be processed. By establishing the above relationship between the feed speed V2 of the spray gun 30 and the rotational linear speed V1 of the roller 50 to be processed, it can be ensured that the boundaries of the sand beam are connected in sequence during the sandblasting process, thereby improving the uniformity of the sandblasting of the peripheral wall of the roller 50 to be processed.

[0058] In some embodiments, Figure 5As shown, the shielding boundary 41 is tilted and forms an angle A with the feed direction of the spray gun 30, A=90°+arctan(V2 / V1). Considering that the actual sandblasting path is a spiral line, that is, the movement speed of the spray gun 30 relative to the peripheral wall of the roller 50 to be processed is the combined movement of the feed speed V2 and the rotation line speed V1, and the relative movement direction of the two also forms an inclination angle based on the feed speed V2 and the rotation line speed V1, the shielding boundary 41 is set to an inclined direction matching the inclination angle, thereby ensuring that the exposed area between the two shielding boundaries 41 is always consistent with the path of the sand beam acting on the surface of the roller 50 to be processed, thereby avoiding the overlap in the height direction of the sandblasting channel 42 during the sandblasting process, which affects the sandblasting uniformity.

[0059] Specifically, see Figure 6 In this embodiment, the distance from the sand material sprayed by the nozzle 31 to the peripheral wall of the roller 50 to be processed is 22-38 mm, and the normal angle B between the sand material sprayed by the nozzle 31 and the roller 50 to be processed is 32°-42°. The longer the sand blasting distance, the smaller the impact force of the sand material, and the larger the sand blasting angle, the smaller the impact force of the sand material; the sand blasting distance between the nozzle 31 and the peripheral wall of the roller 50 to be processed is set between 22 mm and 38 mm, preferably 30 mm, and the sand blasting angle is set between 32° and 42°, preferably 37°. The sand blasting distance and angle are moderate, which can ensure the sand blasting effect while balancing the wear rate of the sand material and reducing the sand material loss.

[0060] Optionally, the nozzle 31 in this embodiment is an oblate nozzle, and the long axis of the nozzle 31 is arranged along the axial direction of the roller 50 to be processed, the long axis size of the nozzle 31 is 8.8-16.8 mm, and the short axis size of the nozzle 31 is 1.8-3.2 mm; the sandblasting air pressure of the sandblasting machine is 0.52-0.73 MPa. It should be understood that the nozzle 31 in this embodiment is tangentially sandblasted toward the roller 50 to be processed. The use of an oblate nozzle for the solid nozzle 31 can increase the width along the axial direction of the roller 50 to be processed, which is beneficial to improving the sandblasting efficiency. At the same time, it can also compress the size of the sand bundle along the tangential direction of the roller 50 to be processed, so that the distance of the sand material contacting the arc surface of the roller 50 to be processed is consistent, which is beneficial to improving the surface roughening uniformity of the roller 50 to be processed after sandblasting, and thus improving the surface roughening treatment quality of the stainless steel strip.

[0061] In some possible implementations, the surface roughness Ra1 of the first textured roller is 0.07-0.12μm, the surface roughness Ra2 of the second textured roller is 0.09-0.14μm, and the surface roughness Ra3 of the third textured roller is 0.05-0.1μm. Here, the first textured roller is used in multiple rough rolling processes to make the rough-rolled strip obtain a roughened surface, thereby increasing the static friction contact force between the rough-rolled strip and the second textured roller, and the roughened surface of the rough-rolled strip tends to be flat after multiple finishing rolling (that is, the textured treatment effect of the first textured roller is close to disappearing), so the surface roughness of the first textured roller is lower than that of the second textured roller; the second textured roller is used in multiple finishing rolling processes to make the finished strip obtain a roughened surface, and the roughened surface can be used as the roughened surface of the final finished strip, but considering the subsequent tension and leveling The type requires the third texturing roller to exert a certain rolling force on the finished strip, so the surface roughness Ra2 of the second texturing roller is selected to be higher than the final required surface roughness value, that is, the surface roughness Ra3 of the third texturing roller. Therefore, the textured surface of the finished strip can not only avoid scratches caused by relative sliding dislocation with the third texturing roller, but also can use the third texturing roller to perform repeated texturing treatment on the basis of the textured surface of the finished strip to improve the uniformity of the textured point cloud distribution on the surface of the finished strip, thereby improving product quality.

[0062] It should be noted that the number of passes of the above-mentioned multi-pass rough rolling is 7 to 9, the total reduction rate is 70% to 80%, and the first and last passes of the multi-pass rough rolling are both smooth rollers. In this multi-pass rough rolling, a continuous rolling mill with eight passes is used, the first and eighth passes are both smooth rollers, one pass in the middle can be selected to use the first rough roller, or multiple passes can be selected to use the first rough roller, but it should be ensured that the previous and next passes of each first rough roller are smooth rollers. Preferably, in this embodiment, the fifth or sixth pass can be preferably used with the first rough roller.

[0063] For example, the multi-pass finishing rolling has 4 to 6 passes, the total reduction ratio is 50% to 60%, and the second roughening roller is used in each pass of the multi-pass finishing rolling. In this multi-pass finishing rolling, a five-pass continuous rolling mill can be used, and smooth rollers are used in all passes except the first and fifth passes, thereby ensuring that the roughened surface of the rough-rolled strip is smoothed after three passes of smooth roller finishing rolling, avoiding repeated roughening treatments during the rough rolling and finishing process, resulting in the microscopic roughness Rz value of the finished strip surface exceeding the standard.

[0064] It should be noted that the surface roughness Ra0≤0.05μm of the roller 50 to be processed. Before the roller 50 to be processed is textured, its surface pretreatment quality should be ensured. Specifically, it can be processed by grinding process to obtain a surface roughness not exceeding 0.05μm, and then textured by sandblasting, so as to ensure that the roller 50 to be processed can obtain a clear point cloud distribution after the above-mentioned sandblasting treatment, improve the surface texture treatment effect of the first texture roller, the second texture roller and the third texture roller, and then ensure the texture treatment quality of the surface of the stainless steel strip.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for processing a textured stainless steel strip, characterized in that: include: A 0.8-1.3 mm cold-rolled stainless steel strip is subjected to multiple rough rolling to obtain a rough-rolled steel strip, wherein at least one intermediate pass of the multiple rough rolling uses a first roughening roller, and the first roughening roller and the first and second passes are smooth rollers; cleaning the rough-rolled steel strip and then annealing it at high temperature; The rough-rolled steel strip after high-temperature annealing is subjected to multiple passes of finish rolling to obtain a finished steel strip, wherein at least the first and last two passes of the multiple passes of finish rolling are performed using a second texturing roller; Cleaning and bright annealing the finished rolled steel strip; The finished steel strip after bright annealing is subjected to drawing and leveling to obtain a finished steel strip, wherein the inlet and outlet of the drawing and leveling are both provided with a third texturing roller; Wherein, the first textured roller, the second textured roller and the third textured roller are all obtained by texturing the surface of the roller to be processed by a roller surface texturing device; The roller surface texturing device comprises: A frame, used for horizontally loading the roll to be processed, the frame is provided with a rotary driving member, the output end of the rotary driving member is used for connecting the roll to be processed and driving the roll to be processed to rotate; A feeding assembly, arranged on the frame, having a feeding end moving along the axial direction of the roll to be processed; A sandblasting machine is arranged on the side of the frame, and a spray gun of the sandblasting machine is connected to the feed end and blasts sand toward the surface of the roller to be processed; A shielding plate connected to the spray gun or the feed end and located between the nozzle of the spray gun and the peripheral wall of the roll to be processed, wherein the shielding plate has two shielding boundaries, the two shielding boundaries are spaced apart along the axial direction of the roll to be processed, and a sandblasting channel is formed between the two shielding boundaries; Wherein, when the roller to be processed rotates one circle, the positive integer multiple of the feeding distance of the spray gun is equal to the horizontal width of the sandblasting channel; The feed speed V2 of the spray gun = (L×V1) / (π×D×N); V1 is the linear speed of the roller to be processed; L is the horizontal width of the sandblasting channel; D is the diameter of the roller to be processed; N is a positive integer; The shielding boundary is inclined and forms an angle A with the feeding direction of the spray gun, where A=90°+arctan(V2 / V1).

2. The method for processing a textured stainless steel strip according to claim 1, characterized in that: The distance from the sand material sprayed from the nozzle to the peripheral wall of the roll to be processed is 22-38 mm, and the normal angle between the sand material sprayed from the nozzle and the roll to be processed is 32°-42°.

3. The method for processing a textured stainless steel strip according to claim 1, characterized in that: The nozzle is an oblate nozzle, and the long axis of the nozzle is arranged along the axial direction of the roll to be processed, the long axis size of the nozzle is 8.8-16.8 mm, and the short axis size of the nozzle is 1.8-3.2 mm; the sandblasting air pressure of the sandblasting machine is 0.52-0.73 MPa.

4. The method for processing a textured stainless steel strip according to claim 1, characterized in that: The surface roughness Ra1 of the first texture roller is 0.07-0.12 μm, the surface roughness Ra2 of the second texture roller is 0.09-0.14 μm, and the surface roughness Ra3 of the third texture roller is 0.05-0.1 μm.

5. The method for processing a textured stainless steel strip according to claim 1, characterized in that: The number of passes of the multi-pass rough rolling is 7 to 9, the total reduction rate is 70% to 80%, and smooth rollers are used in the first and last passes of the multi-pass rough rolling.

6. The method for processing a textured stainless steel strip according to claim 1, characterized in that: The number of passes of the multi-pass finishing rolling is 4 to 6, the total reduction ratio is 50% to 60%, and the second texturing roller is used in each pass of the multi-pass finishing rolling.

7. The method for processing a textured stainless steel strip according to any one of claims 1 to 6, characterized in that: The surface roughness of the roller to be processed is Ra0≤0.05 μm.

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