A wide-width high-temperature alloy strip production and processing technology and processing device

Abstract

The present invention relates to the technical field of alloy hot rolling processing, and in particular to a wide-width high-temperature alloy strip production and processing technology and processing device, comprising the steps of: heating a slab, rough rolling, and obtaining a rough-rolled strip; performing a flying shearing treatment on the rough-rolled strip; performing a finish rolling on the rough-rolled strip after the flying shearing treatment to reduce the thickness of the strip and obtain a finish-rolled strip; performing repeated hot coiling-finishing rolling operations on the finish-rolled strip until the strip reaches a predetermined thickness; in the present invention, a processing technology combining rough rolling, finish rolling, and furnace coil hot rolling can be used to produce a strip with a width of more than 1 meter; and two sets of coiling furnaces are used to repeatedly hot coil a strip with a thickness of 20 mm or less, thereby realizing subsequent reciprocating finish rolling processing on the strip, which can ensure the normal subsequent strip rolling; and can avoid the problem that the rolling temperature drops below the rolling range and rolling cannot be performed due to the thinning of the plate thickness and the increase of the heat dissipation area.

Description

Technical Field

[0001] The invention relates to the technical field of alloy hot rolling processing, and in particular to a wide-width high-temperature alloy strip production and processing technology and a processing device. Background Art

[0002] The process of producing hot-rolled strip with a thickness of 2-10mm on a hot strip rolling mill is called hot rolling process; among them, strip width below 600mm is called narrow strip, and strip width exceeding 600mm is called wide strip.

[0003] Most existing coil rolling processes use slabs with a width of 500mm, a thickness of 60mm, and a length of 2000mm. After 4-roll hot rolling, the slabs are rolled into 5-6mm thick coils, which are then rolled into 1.5mm thick coils on an 8-roll rolling mill and then cold rolled. The market currently requires 1-meter-wide coils, but since the rolling temperature range of some nickel-based alloys such as C276 and GH4169 is relatively narrow, after the coils are rolled thin, the strip area increases, and the heat dissipation speed temperature quickly drops below the rolling temperature range; and the deformation resistance of materials below the rolling temperature rises rapidly, and it is difficult to roll simply by the downward pressure of the rollers. Summary of the invention

[0004] The purpose of the present invention is to provide a wide-width high-temperature alloy strip production and processing technology and a processing device, which mainly solves the technical problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A wide-width high-temperature alloy strip production process, characterized in that it includes the following steps:

[0007] S1, heating and rough rolling the slab to obtain a rough-rolled strip;

[0008] S2, performing flying shearing on the rough-rolled strip;

[0009] S3, finishing rolling the rough-rolled strip after the flying shear treatment to reduce the thickness of the strip to obtain a finished-rolled strip;

[0010] S4, repeatedly performing hot coiling-finishing rolling operations on the finished rolled strip until the strip reaches a predetermined thickness.

[0011] Preferably, the heating conditions are:

[0012] The heating temperature is 1100℃-1250℃, and the insulation time is 20-60 minutes.

[0013] Preferably, the rough rolling requirements are:

[0014] The thickness of the rough-rolled strip is 35-45 mm.

[0015] Preferably, the finishing rolling requirements are:

[0016] The thickness of the finished rolled strip is 18-20 mm.

[0017] Preferably, in step S4, during the repeated hot coiling-finishing rolling operation, the strip is heated to 1100° C.-1250° C.;

[0018] The plate strip obtained in step S4 is a 4-6 mm coil or a 3 mm master tape.

[0019] Preferably, the processing technology further comprises:

[0020] The mother strip is cold rolled to roll the mother strip with a thickness of 3 mm into a thin strip of 2 mm or less.

[0021] Preferably, the processing technology further comprises:

[0022] Before rough rolling and / or finish rolling, the rough rolled strip after the slab / fly shearing treatment is subjected to surface oxidation removal treatment.

[0023] Preferably, the slab has a thickness of 95-105 mm, a width of 1000-1100 mm, and a length greater than 6000 mm.

[0024] A wide-width high-temperature alloy coil production and processing device, suitable for the wide-width high-temperature alloy coil production and processing process described above to produce coils, including a heating furnace, a rough descaling machine, a rough rolling mill, a flying shear unit, a fine descaling machine, a coiling furnace, a finishing rolling mill, a furnace coil mill, a laminar cooling unit and a coiling machine, wherein a roller conveying unit is arranged between the heating furnace, the rough descaling machine, the rough rolling mill, the flying shear unit, the fine descaling machine, the coiling furnace, the finishing rolling mill, the furnace coil mill, the laminar cooling unit and the coiling machine, and the coiling furnace is provided with two groups, and the two groups of coiling furnaces are located on the opposite sides of the finishing rolling furnace and the furnace coil mill;

[0025] The roller conveying unit is used to convey the slab during the processing;

[0026] The heating furnace is used to heat the slab before rolling;

[0027] The rough descaling machine is used to remove the oxide scale on the surface of the slab;

[0028] The rough rolling mill is used to roll the slab into a thickness that can be finished rolled;

[0029] The flying shear unit is used to trim the side excess material of the plate and strip after rough rolling;

[0030] The fine descaling machine is used to remove the oxide scale on the surface of the rough rolled strip after the flying shear treatment;

[0031] The finishing mill is used to perform finish rolling on the rough-rolled strip to reduce the thickness of the strip to obtain a finished-rolled strip;

[0032] The coiling furnace can reversibly coil the plate and strip on the furnace drum inside the furnace body for reciprocating conveyance of the finished rolled plate and strip;

[0033] The Steckel mill is used to perform a finish rolling operation on the finished strip until the strip reaches a predetermined thickness;

[0034] The laminar cooling unit is used to cool down the plate strip of predetermined thickness;

[0035] The coiler is used to collect the cooled plate strip with a predetermined thickness.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] In the present invention, a processing technology combining rough rolling, finishing rolling and furnace coil hot rolling can be used to produce coils with a width of more than 1 meter; and two groups of coiling furnaces are used to repeatedly hot coil the plates and strips with a thickness of 20 mm or less, thereby realizing the subsequent reciprocating finishing rolling processing of the plates and strips, which can ensure the normal subsequent rolling of the plates and strips; it can avoid the problem that the rolling temperature drops below the rolling range and the rolling cannot be carried out due to the thinning of the plate thickness and the increase of the heat dissipation area. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 It is a flow chart of a wide-width high-temperature alloy strip production and processing process of the present invention;

[0040] Figure 2 The system block diagram of a wide-width high-temperature alloy strip production and processing device of the present invention.

[0041] In the figure: roller conveying unit 1, slab 2, heating furnace 3, rough descaling machine 4, roughing mill 5, flying shear unit 6, fine descaling machine 7, coiling furnace 8, finishing mill 9, Steckel mill 10, laminar cooling unit 11, coiler 12. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The embodiments of the present invention and all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] like Figure 1 As shown, the present invention provides a wide-width high-temperature alloy strip production and processing process, which is characterized by comprising the following steps:

[0044] S1, heating the slab 2, and rough rolling it to obtain a rough rolled strip;

[0045] S2, performing flying shearing on the rough-rolled strip;

[0046] S3, performing finish rolling on the rough-rolled strip after the flying shear treatment to reduce the thickness of the strip and obtain a finish-rolled strip;

[0047] S4, repeatedly performing hot coiling-finishing rolling operations on the finished strip until the strip reaches a predetermined thickness.

[0048] Specifically, the heating conditions are: heating temperature is 1100° C.-1250° C., and insulation time is 20-60 minutes.

[0049] Specifically, the rough rolling requirement is: the thickness of the rough rolled strip is 35-45mm.

[0050] Specifically, the finishing rolling requirements are: the thickness of the finished rolled strip is 18-20mm.

[0051] Specifically, in step S4, during the repeated hot coiling-finishing rolling operation, the strip is heated to 1100° C.-1250° C.;

[0052] The plate strip obtained in step S4 is a 4-6 mm tape or a 3 mm master tape.

[0053] Specifically, the processing technology also includes: before rough rolling and / or finish rolling, performing surface oxidation removal treatment on the slab 2 / the rough-rolled strip after flying shearing treatment.

[0054] Specifically, the slab 2 has a thickness of 95-105 mm, a width of 1000-1100 mm, and a length greater than 6000 mm.

[0055] Specifically, the processing technology also includes: cold rolling the mother strip to roll the mother strip with a thickness of 3 mm into a thin strip of 2 mm or less, and the processing technology specifically includes:

[0056] 1) Heat the master tape to 1100℃-1250℃;

[0057] 2) The heated mother tape surface is pickled (using a hydrochloric acid solution with a concentration of 20% or 10%-15%, and the temperature of the hydrochloric acid solution is 30°C-40°C);

[0058] 3) Check the surface defects of the mother tape after pickling and perform grinding treatment;

[0059] 4) Roll the qualified master strip into a thin strip with a thickness of 2 mm or less;

[0060] 5) Degreasing the surface of the rolled strip;

[0061] 6) performing solution treatment on the degreasing thin strip;

[0062] 7) The heat-treated thin strip is cut, cooled and then rolled up.

[0063] refer to Figure 2 As shown, the present invention also provides a wide-width high-temperature alloy coil production and processing device, which is suitable for manufacturing coils according to the above-mentioned wide-width high-temperature alloy coil production and processing process, comprising a heating furnace 3, a rough descaling machine 4, a rough rolling mill 5, a flying shear unit 6, a fine descaling machine 7, a coiling furnace 8, a finishing rolling mill 9, a furnace coil rolling mill 10, a laminar cooling unit 11 and a coiling machine 12, wherein a roller conveying unit 1 is arranged between the heating furnace 3, the rough descaling machine 4, the rough rolling mill 5, the flying shear unit 6, the fine descaling machine 7, the coiling furnace 8, the finishing rolling mill 9, the furnace coil rolling mill 10, the laminar cooling unit 11 and the coiling machine 12, and two groups of coiling furnaces 8 are arranged, and the two groups of coiling furnaces 8 are located on the opposite sides of the finishing rolling furnace and the furnace coil rolling mill 10;

[0064] The roller conveying unit 1 is used to convey the slab 2 during the processing;

[0065] The heating furnace 3 is used to heat the slab 2 before rolling;

[0066] The rough descaling machine 4 is used to remove the oxide scale on the surface of the slab 2;

[0067] The rough rolling mill 5 is used to roll the slab 2 into a thickness that can be finished rolled;

[0068] The flying shear unit 6 is used to trim the side excess material of the plate and strip after rough rolling;

[0069] The fine descaling machine 7 is used to remove the oxide scale on the surface of the rough rolled strip after the flying shear treatment;

[0070] The finishing mill 9 is used to perform finish rolling on the rough-rolled strip to reduce the strip thickness and obtain a finished strip;

[0071] The coiling furnace 8 can reversibly coil the plate and strip on the furnace drum inside the furnace body, and is used for reciprocating conveying of the finished rolled plate and strip;

[0072] The Steckel mill 10 is used to perform a finish rolling operation on the finished strip until the strip reaches a predetermined thickness;

[0073] The laminar cooling unit 11 is used to cool the plate strip of predetermined thickness;

[0074] The coiler 12 is used to collect the cooled strip with a predetermined thickness.

[0075] In the present invention, a processing technology combining rough rolling, finishing rolling and furnace coil hot rolling can be used to produce coils with a width of more than 1 meter; and two groups of coiling furnaces 8 are used to repeatedly hot coil the plates and strips with a thickness of 20 mm or less, thereby realizing the subsequent reciprocating finishing rolling processing of the plates and strips, which can ensure the normal subsequent rolling of the plates and strips; it can avoid the problem that the rolling temperature drops below the rolling range and the rolling cannot be carried out due to the thinning of the plate thickness and the increase of the heat dissipation area.

[0076] Specifically, in step S1, the ingot shape needs to be changed from an ingot of about 1 ton in the traditional process to an ingot of more than 6 tons, and the ingot of more than 6 tons is an induction melting + electroslag melting ingot. The ingot has no metallurgical defects after flaw detection, and the composition meets the standard requirements of the base material. Then, the base material of the ingot of more than 6 tons is forged and rolled into a slab 2 with a thickness of 95-105mm, a width of 1000-1100mm, and a length greater than 6000mm, and is cleaned and used as a slab 2 with a thickness of 95-105mm for producing coils.

[0077] As an embodiment of the present invention, during the rolling process, first, an ingot base material of more than 6 tons is forged and then rolled into a slab 2 with a thickness of 95 mm, a width of 1000 mm, and a length of 6000 mm for rolling a coil, then, the slab 2 with a thickness of 95 mm is placed on the feeding end of the roller conveying unit 1, and then the slab 2 is sent to the heating furnace 3 through the roller conveying unit 1 and heated to 1100°C, and the heated slab 2 is kept warm for 30 minutes, and then the heated slab 2 is sent to the rough descaling machine 4 to remove the surface oxide scale, and then, the slab 2 after the surface oxide scale is removed is rough-rolled by the rough rolling mill 5, and the thickness is rolled from 95 mm to 35 mm to form a strip; then, the rough-rolled strip is subjected to flying shear processing by the flying shear unit 6 (the edges and corners of the strip are cut off), and then the strip after flying shear processing is passed through the fine descaling machine 7. Remove the surface oxide scale again; then send the strip to the finishing mill 9 to roll the 35mm thick strip to 18mm thick, and then coil and unwind the 18mm thick strip through the furnace rollers inside the two sets of coiling furnaces 8, and heat the strip to 1100℃ through the heating assembly in the coiling furnace 8, so that the strip is reciprocated between the finishing furnace 9 and the furnace coil mill 10, and the 18mm thick strip is rolled into a 4mm thick strip; then, send the strip to the laminar cooling unit 11 for water cooling to reduce the temperature to below 30℃; then use the coiler 12 to coil the cooled strip, and finally perform solid solution treatment, pickling (using a hydrochloric acid solution with a concentration of 20% or 10%-15%, and the temperature of the hydrochloric acid solution is 30℃-40℃) and trimming on the strip, and wait for the strip to pass the inspection before leaving the factory.

[0078] As a preferred embodiment of the present invention, during the rolling process, first, an ingot base material of more than 6 tons is forged and then rolled into a slab 2 with a thickness of 100 mm, a width of 1050 mm, and a length of 6100 mm for rolling coils. Next, the slab 2 with a thickness of 100 mm is placed on the feeding end of the roller conveying unit 1, and then the slab 2 is sent to the heating furnace 3 through the roller conveying unit 1 and heated to 1200°C, and the heated slab 2 is kept warm for 30 minutes, and then the heated slab 2 is sent to the rough descaling machine 4 to remove the surface oxide scale. Next, the slab 2 after the surface oxide scale is removed is rough rolled by the rough rolling mill 5, and the thickness is rolled from 100 mm to 40 mm to form a strip. Then, the rough rolled strip is subjected to flying shear processing by the flying shear unit 6 (the edges and corners of the strip are cut off), and then the strip after flying shear processing is finely removed. The scale machine 7 removes the surface oxide scale again; then the strip is sent to the finishing mill 9 to roll the 40mm thick strip to a thickness of 19mm, and then the 19mm thick strip is coiled and unwound by the furnace rollers inside the two sets of coiling furnaces 8, and the strip is heated to 1200℃ by the heating component in the coiling furnace 8, so that the strip is reciprocated between the finishing furnace 9 and the furnace coil mill 10, and the 19mm thick strip is rolled into a 5mm thick coil; then, the coil is sent to the laminar cooling unit 11 for water cooling to reduce the temperature to below 30℃; the cooled coil is then coiled and collected by the coiler 12, and finally the coil is subjected to solution treatment, pickling (using a hydrochloric acid solution with a concentration of 20% or 10%-15%, and the temperature of the hydrochloric acid solution is 30℃-40℃) and trimming, and the coil is shipped after passing the inspection.

[0079] As another embodiment of the present invention, during the rolling process, first, an ingot base material of more than 6 tons is forged and then rolled into a slab 2 with a thickness of 105 mm, a width of 1100 mm, and a length of 6200 mm for rolling a coil, then, the slab 2 with a thickness of 105 mm is placed on the feeding end of the roller conveying unit 1, and then, the slab 2 is sent to the heating furnace 3 through the roller conveying unit 1 and heated to 1250°C, and the heated slab 2 is kept warm for 30 minutes, and then, the heated slab 2 is sent to the rough descaling machine 4 to remove the surface oxide scale, and then, the slab 2 after the surface oxide scale is removed is rough-rolled by the rough rolling mill 5, and the thickness is rolled from 105 mm to 45 mm to form a strip; then, the rough-rolled strip is subjected to flying shear processing by the flying shear unit 6 (the edges and corners of the strip are cut off), and then the strip after flying shear processing is finely removed. The scale machine 7 removes the surface oxide scale again; then the strip is sent to the finishing mill 9 to roll the 45mm thick strip to a thickness of 20mm, and then the 20mm thick strip is coiled and unwound by two sets of furnace rollers inside the coiling furnace 8, and the strip is heated to 1250℃ by the heating component in the coiling furnace 8, so that the strip is reciprocated between the finishing furnace 9 and the furnace coil mill 10, and the 20mm thick strip is rolled into a 6mm thick coil; then, the coil is sent to the laminar cooling unit 11 for water cooling to reduce the temperature to below 30℃; the cooled coil is then coiled and collected by the coiler 12, and finally the coil is subjected to solution treatment, pickling (using a hydrochloric acid solution with a concentration of 20% or 10%-15%, and the temperature of the hydrochloric acid solution is 30℃-40℃) and trimming, and the coil is shipped after passing the inspection.

[0080] In this embodiment, during the above-mentioned rolling process, the plate and strip with a thickness of 18-20 mm can also be reciprocatingly rolled into a master strip with a thickness of 3 mm for standby use, which is used for cold rolling process to roll thin strips with a thickness of 2 mm and below; during the rolling process of the thin strip, the master strip is first heat-treated (heated to 1120°C) and pickled (using a hydrochloric acid solution with a concentration of 20% or 10%-15%, and the temperature of the hydrochloric acid solution is 30°C-40°C), and then the surface defects of the plate and strip are checked (specifically check whether the surface of the coil has the following defects: skinning, folding, cracks and holes, etc.), and then the qualified master strip is rolled from 3 mm to a thin strip with a thickness of 2 mm and below through the furnace coil mill 10, and then the surface of the thin strip is degreased and solution treated, and finally cut, water-cooled, coiled, and delivered from the factory.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wide-width high-temperature alloy strip production and processing process, characterized in that: A wide-width high-temperature alloy strip production and processing device is used, comprising the following steps: S1. Forging and rolling the ingot parent material of more than 6 tons of induction melting + electroslag melting into a slab with a thickness of 95-105 mm, a width of 1000-1100 mm, and a length greater than 6000 mm after flaw detection and grinding to obtain a slab with a thickness of 95-105 mm, heating the slab, and rough rolling to obtain a rough-rolled plate strip; The heating conditions are: The heating temperature is 1100℃-1250℃, and the holding time is 20-60 minutes; The rough rolling requirements are: The thickness of the rough-rolled strip is 35-45 mm; S2, performing flying shearing on the rough-rolled strip; S3, finishing rolling the rough-rolled strip after the flying shear treatment to reduce the thickness of the strip to obtain a finished-rolled strip; The finishing rolling requirements are: The thickness of the finished rolled strip is 18-20 mm; S4, repeatedly hot coiling-finishing rolling the finished strip, keeping the strip heated to 1100° C.-1250° C., to obtain a 4-6 mm coil or a 3 mm master strip; The mother strip is cold rolled to reduce the mother strip with a thickness of 3 mm to a thin strip of 2 mm or less. The processing technology specifically includes: 1) Heat the master tape to 1100℃-1250℃; 2) The heated mother tape surface is pickled with a hydrochloric acid solution having a concentration of 20% or 10%-15%, and the temperature of the hydrochloric acid solution is 30℃-40℃; 3) Check the surface defects of the master tape after pickling and perform grinding treatment; 4) Roll the qualified master strip into a thin strip with a thickness of 2 mm or less; 5) Degreasing the surface of the thin strip after rolling; 6) Solution treatment of the degreasing thin strip; 7) Cut the heat-treated thin strip, cool it, and then roll it up; The wide-width high-temperature alloy coil production and processing device comprises a heating furnace, a rough descaling machine, a rough rolling mill, a flying shear unit, a fine descaling machine, a coiling furnace, a finishing rolling mill, a Steckel rolling mill, a laminar cooling unit and a coiling machine, wherein a roller conveying unit is arranged between the heating furnace, the rough descaling machine, the rough rolling mill, the flying shear unit, the fine descaling machine, the coiling furnace, the finishing rolling mill, the Steckel rolling mill, the laminar cooling unit and the coiling machine, and the coiling furnace is provided with two groups, and the two groups of the coiling furnaces are located on the opposite sides of the finishing rolling furnace and the Steckel rolling mill; The roller conveying unit is used to convey slabs with a thickness of 95-105 mm, a width of 1000-1100 mm, and a length greater than 6000 mm during processing; The heating furnace is used to heat the slab before rolling, and the heating conditions are: the heating temperature is 1100° C.-1250° C., and the holding time is 20-60 minutes; The rough descaling machine is used to remove the oxide scale on the surface of the slab; The rough rolling mill is used to roll the slab into a thickness that can be finished rolled, so as to obtain a rough rolled strip with a thickness of 35-45 mm; The flying shear unit is used to trim the side excess material of the plate and strip after rough rolling; The fine descaling machine is used to remove the oxide scale on the surface of the rough rolled strip after the flying shear treatment; The finishing mill is used to perform finish rolling on the rough-rolled strip to reduce the thickness of the strip to obtain a finished strip with a thickness of 18-20 mm; The coiling furnace can reversibly coil the plate and strip on the furnace drum inside the furnace body, and is used to reciprocate the finished rolled plate and strip, and keep the plate and strip heated to 1100°C-1250°C; The Steckel mill is used to perform finish rolling on the finished strip until the strip reaches a predetermined thickness, thereby obtaining a 4-6 mm coil or a 3 mm master strip; The laminar cooling unit is used to cool down the plate strip of predetermined thickness; The coiler is used to collect the cooled plate strip with a predetermined thickness.

2. The wide-width high-temperature alloy strip production and processing process according to claim 1 is characterized in that: The processing technology also includes: Before rough rolling and / or finish rolling, the rough rolled strip after the slab / fly shearing treatment is subjected to surface oxidation removal treatment.

Images