CN103551404A - Production method of stainless deformed bar - Google Patents
Production method of stainless deformed bar Download PDFInfo
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- CN103551404A CN103551404A CN201310545482.4A CN201310545482A CN103551404A CN 103551404 A CN103551404 A CN 103551404A CN 201310545482 A CN201310545482 A CN 201310545482A CN 103551404 A CN103551404 A CN 103551404A
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Abstract
The invention relates to a production method of a stainless deformed bar. A process flow comprises cogging, rough rolling, intermediate rolling and fine rolling, and is characterized in that after a finished product is subjected to intermediate rolling, a through water cooling device is arranged, and the finished product is fed into a fine rolling machine after cooling. The production method comprises the following specific step: adding the through water cooling device before rolling the finished product so as to realize controlled cooling before production of a dual-phase deformed bar, wherein the cooling water flow is 35-45 m<3>/h, the pressure is 0.4-0.6 MPa, and cooling time is 1-2 seconds. The method is simple and convenient in process, and the problem of insufficient straightness of the finished product caused by cooling after rolling can be prevented effectively by cooling before continuous rolling; the size accuracy, surface quality and physical performance of the product are enhanced remarkably, and the production efficiency is increased greatly; moreover, the prepared dual-phase stainless steel deformed bar has the advantages of corrosion resistance, low cost, long service life and the like, is widely applied to bridge construction and the like, has a wide market prospect, and contributes to creating considerable benefit for an enterprise.
Description
Technical field
The present invention relates to a kind of cooling means of stainless screw-thread steel.
Background technology
The technological process that production line of bar is produced screw-thread steel is: heating, and------lowering the temperature to be rolled,---4 480 2 roller horizontal mills---S4 crop end is cut, and---------------------------shear gauge is put in storage hot-metal sawing machine cold bed multi-length shear pinch roll inclined guide groove 2 360 2 roller horizontal mills to collect bundling by pickling---packing of weighing---in 650 3 roller coggings; When producing 32,28 two-phase stainless screw-thread steel, 360 2 the 4th of roller horizontal mill are as finished product rolling mill, and this type mill spring is large, roll axial float is larger, and screw-thread steel size is difficult to guarantee, frequent wrong roller, produce a large amount of waste products, need frequent parking handling failure, production efficiency is low, and screw-thread steel product mechanical property is in the English mark standard edge that rolls off the production line, if finished product is worn water cooling after going out pass, can cause screw-thread steel directly to spend not up to standard, increase straightener, need increase equipment, increase production cost.
Summary of the invention
In order to overcome above-mentioned deficiency, the present invention aims to provide a kind of cooling means of stainless screw-thread steel, and screw-thread steel finished product sortie is moved to pre-finish rolling, and the relative two roller horizontal mills of this type milling train, bounce little, and precision is high, is easy to adjust control.2 vacant middle milling trains are set up to 2 and wear water-cooling apparatus, wear water cooling controlled rolling before realizing finished product, carry out finish rolling after cooling, not only make two-phase stainless screw-thread steel mechanical performance index improve 12%, and do not affect the straight degree of two-phase stainless screw-thread steel.
The cooling means of stainless screw-thread steel provided by the invention, realizes by the following technical solutions:
A kind of production method of stainless screw-thread steel, technological process comprises: cogging, roughing, in roll, finish rolling, it is characterized in that: finished product through in roll after, water-cooling apparatus is worn in setting, enters finishing mill after cooling again, and concrete steps are: before finished product rolling, increase and wear water-cooling apparatus, before realizing two-phase screw-thread steel finished product, control is cooling, cooling water flow is 35-45m3/ hour, and pressure is 0.4-0.6MPa, 1-2 second cool time.
The production method of described stainless screw-thread steel, comprises the following steps:
(1) heating
Blank enters pusher-type furnace, and tapping temperature is 1100 ℃-1200 ℃, the size 220mmx220mmx3500mm of blank;
(2) cogging
Adopt 650 three-high bloomers, blank, through 650 mill milling 13 passages, rolls into 85mm round steel by 220mm * 220mm, and after cogging, temperature is 950 ℃-1050 ℃, and cooling is waited for;
(3) roughing
Roughing technique comprises 4 480 2 roller horizontal mills, and blank temperature drops to 870 ℃ and enters roughing mill when following, and through four tandem rollings, last roughing mill rolls into 48mm round steel;
(4) shear
Through S4 cutting head and back-end crop, head and afterbody defect are cut only to crop length 300mm-350mm, back-end crop length 350mm-500mm;
(5) in, roll
Middle roll process comprises 2 360 2 roller horizontal mills, enters twice tandem rolling of middle milling train and rolls into 36mm round steel; Rolled piece goes out temperature≤860 ℃ after milling train;
(6) wear water cooling
Arrange two and wear water-cooling apparatus, round steel head enters water cooling plant, and when head leaving water device for cooling moment, water cooling plant magnetic valve starts, the cooling rolled piece of water cooling plant water flowing, and two groups of water cooling plants can be lowered the temperature 60 ℃～80 ℃;
The cooling rolled piece of spraying water after workpiece front end leaving water device for cooling, head is not cooling is that water cooling plant reduces rolled piece temperature in order to prevent that workpiece front end temperature drop from causing more greatly next sortie load to increase;
(7) pre-finish rolling
Adopt 275 cantilevered pre-finishing mills, pre-finishing mill is nipped after rolled piece, and Horizontal loose sleeve loop-rising roll level shifts out and makes rolled piece form semicircular arc, realizes tension free rolling;
(8) secondary finish rolling
Adopt 275 cantilevered pre-finishing mills, pre-finishing mill the second rolling mill is nipped after rolled piece, on vertical kink loop-rising roll, moves and makes rolled piece form semicircular arc, realizes tension free rolling;
Rolled piece goes out after milling train through cross roll road pinch roll, and pinch roll speed is faster 8% than rolling mill speed, forms certain tension force between pinch roll and milling train, and rolled piece is stretching, meanwhile, when rolled piece leaves milling train, guarantees that rolled piece travels at the uniform speed;
(9) secondary shearing
Adopt multi-length shear, size is set rational multiple lengths as requested, by multi-length shear, rolled piece is cut into several cut lengths;
Multiple lengths can not exceed cold bed length, but can not be too short, prevents that multiple length from knocking into the back, and causes the accident;
(10) cooling, packing
Rolled piece is cooling through cold bed again, is collected together, and through hot-metal sawing machine sawing, becomes needed size, check, and bundling, pickling, washes away the stainless screw-thread steel oxide on surface of dual phase steel, the packing of weighing warehouse-in.
The described water-cooling apparatus of wearing, comprise inlet tube, entrance bearing, entrance base, connecting duct, outlet bearing, outlet, outlet base, total length 1.7m, in entrance bearing, establish cooling water nozzle, nozzle inside diameter 10mm, be the angle of 11 °～15 ° with workpiece to be cooled, by entrance base, be fixed on memorial archway crossbeam; Outlet bearing is connected with entrance bearing by connecting duct, outlet bearing is provided with the osculum of two caliber 40mm, by outlet base, be fixed on memorial archway crossbeam, outlet bearing rear portion outlet, the inner contrainjector of installing, nozzle inside diameter 8mm, stops cooling water to flow out from water cooling plant, by osculum, discharges.
The present invention is after two middle milling trains, and water-cooling apparatus is worn in design, realizes the front control of the stainless screw-thread steel finished product of dual phase steel cooling, and this cooling device, guarantees that cooling water fully contacts with cooling piece, reduces rolled piece temperature.By latter two in original four middle milling trains, move to pre-finish-rolling process, pre-finishing mill supplied materials cross section diameter increases 6mm than original supplied materials cross section diameter, the former design diapsid of pre-smart machine first roll collar of rolling mill, because pass is widened and is changed single-orifice type into, the outer labyrinth ring of milling train changes thin 6mm, the second rolling mill is constant, according to pass, configures corresponding guide and guard.
Of the present invention
beneficial effect:
After this milling method is implemented, the dimensional accuracy of two-phase stainless screw-thread steel, surface quality, mechanical property all obviously improve, and production efficiency increases substantially.Having solved two-phase stainless screw-thread steel is not changing on the basis of main equipment, once lumber-preserving, and the two phase stainless steel spiral of preparing has many-sided advantages such as corrosion-resistant, cost is low, the life-span is long, is widely used in bridge construction etc., the wide ，Wei of market prospects enterprise has created considerable benefit.
The specific embodiment
Below by embodiment, further illustrate the present invention, but be not limited to following examples.
Embodiment 1: the production method of stainless screw-thread steel
(1) heating
Blank enters pusher-type furnace, and tapping temperature is 1100 ℃-1120 ℃; The size 220mmx220mmx3500mm of blank
(2) cogging
Adopt 650 three-high bloomers, blank, through 650 mill milling 13 passages, rolls into 85mm round steel by 220mm * 220mm, and after cogging, temperature is 950 ℃-1050 ℃, and cooling is waited for;
(3) roughing
Roughing technique comprises 4 480 2 roller horizontal mills, blank temperature drops to≤enter roughing mill 870 ℃ time, and through four tandem rollings, last roughing mill rolls into 48mm round steel;
(4) shear
Through S4 cutting head and back-end crop, head and afterbody defect are cut only;
(5) in, roll
Middle roll process comprises 2 360 2 roller horizontal mills, enters twice tandem rolling of middle milling train and rolls into 36mm round steel; After rolled piece goes out milling train, temperature is≤860 ℃
(6) wear water cooling
Arrange two and wear water-cooling apparatus, round steel head enters water cooling plant, and when head leaving water device for cooling moment, water cooling plant magnetic valve starts, the cooling rolled piece of water cooling plant water flowing, and two groups of water cooling plants make 60 ℃-100 ℃ of rolled piece coolings;
The cooling rolled piece of spraying water after workpiece front end leaving water device for cooling, head is not cooling is that water cooling plant reduces rolled piece temperature in order to prevent that workpiece front end temperature drop from causing more greatly next sortie load to increase;
(7) pre-finish rolling
Adopt 275 cantilevered finishing mills, pre-finishing mill is nipped after rolled piece, and Horizontal loose sleeve loop-rising roll level shifts out and makes rolled piece form semicircular arc, realizes tension free rolling;
(8) secondary finish rolling
Adopt 275 cantilevered finishing mills, pre-finishing mill the second rolling mill is nipped after rolled piece, on vertical kink loop-rising roll, moves and makes rolled piece form semicircular arc, realizes tension free rolling;
Rolled piece goes out after milling train through cross roll road pinch roll, and pinch roll speed is faster 8% than rolling mill speed, forms certain tension force between pinch roll and milling train, and rolled piece is stretching, meanwhile, when rolled piece leaves milling train, guarantees that rolled piece travels at the uniform speed;
(9) secondary shearing
Adopt multi-length shear, set as requested rational multiple lengths: 28m, by multi-length shear, rolled piece is cut into cut lengths: 7m;
Multiple lengths can not exceed cold bed length, but can not be too short, prevents that multiple length from knocking into the back, and causes the accident;
(10) cooling, packing
Rolled piece is cooling through cold bed again, is collected together, and through hot-metal sawing machine sawing, becomes needed size, check, and bundling, pickling, washes away the stainless screw-thread steel oxide on surface of dual phase steel, the packing of weighing warehouse-in.
Produce Φ 32 specification stainless steel spirals, middle milling train is during as finisher, reinforcing bar basic circle diagonal angle difference 0.5-1mm, and rolled piece rough surface, adopts after the method for the present embodiment, reinforcing bar basic circle diagonal angle difference 0-0.3mm, surface roughness has had raising.
TAfter not rolling gentle rolling process before cool cast with water-cooled, Φ32 specification stainless steel rebar yield strength 510MPa, cool gentle rolling process before rolling into use water-cooled, Φ32 specification stainless steel rebar yield strength of 560MPa.
Embodiment 2: the production method of stainless screw-thread steel
The processing step of the present embodiment is with embodiment 1, and finished product frame moves on to 275 cantilevered finishing mills, and single groove amount of rolling is brought up to 400 tons by original 200 tons, and before finished product, rolled piece is worn water cooling.
While adopting existing technique, after Φ 32 specification stainless steel spirals roll rear finished product, cooling straight degree reaches below 4mm/m; Adopt the inventive method, cooling straight degree≤3mm/m before Φ 32 specification stainless steel spiral finished products; The straight degree of the present embodiment gained finished product is 2.5mm/m.
Claims (3)
1. the production method of a stainless screw-thread steel, technological process comprises: cogging, roughing, in roll, finish rolling, it is characterized in that: finished product through in roll after, water-cooling apparatus is worn in setting, enters finishing mill after cooling again, and concrete steps are: before finished product rolling, increase and wear water-cooling apparatus, before realizing two-phase screw-thread steel finished product, control is cooling, cooling water flow is 35-45m3/ hour, and pressure is 0.4-0.6MPa, and be 1-2 second cool time.
2. the production method of stainless screw-thread steel according to claim 1, is characterized in that: comprise the following steps:
(1) heating
Blank enters pusher-type furnace, and tapping temperature is 1100 ℃-1200 ℃, and billet size is 220mmx220mmx3500mm;
(2) cogging
Adopt 650 three-high bloomers, blank, through 650 mill milling 13 passages, rolls into 85mm round steel by 220mm * 220mm, and after cogging, temperature is 950 ℃-1050 ℃, and cooling is waited for;
(3) roughing
Roughing technique comprises 4 480 2 roller horizontal mills, and blank temperature drops to 870 ℃ and enters roughing mill when following, and through four tandem rollings, last roughing mill rolls into 48mm round steel;
(4) shear
Through S4 cutting head and back-end crop, head and afterbody defect are cut only to crop length 300mm-350mm, back-end crop length 350mm-500mm;
(5) in, roll
Middle roll process comprises 2 360 2 roller horizontal mills, enters two tandem rollings of middle milling train and rolls into 36mm round steel; Rolled piece goes out temperature≤860 ℃ after milling train
(6) wear water cooling
Arrange two and wear water-cooling apparatus, round steel head enters water cooling plant, and when head leaving water device for cooling moment, water cooling plant magnetic valve starts, the cooling rolled piece of water cooling plant water flowing, and two groups of water cooling plants can be lowered the temperature 60 ℃～80 ℃;
(7) pre-finish rolling
Adopt 275 cantilevered pony roughers, pre-finishing mill is nipped after rolled piece, and Horizontal loose sleeve loop-rising roll level shifts out and makes rolled piece form semicircular arc, realizes tension free rolling;
(8) secondary finish rolling
Adopt 275 cantilevered pony roughers, pre-finishing mill the second rolling mill is nipped after rolled piece, on vertical kink loop-rising roll, moves and makes rolled piece form semicircular arc, realizes tension free rolling;
Rolled piece goes out after milling train through cross roll road pinch roll, and pinch roll speed is faster 8% than rolling mill speed, forms certain tension force between pinch roll and milling train, and rolled piece is stretching, meanwhile, when rolled piece leaves milling train, guarantees that rolled piece travels at the uniform speed;
(9) secondary shearing
Adopt multi-length shear, size is set rational multiple lengths as requested, by multi-length shear, rolled piece is cut into several cut lengths;
(10) cooling, packing
Rolled piece is cooling through cold bed again, is collected together, and through hot-metal sawing machine sawing, becomes needed size, check, and bundling, pickling, washes away the stainless screw-thread steel oxide on surface of dual phase steel, the packing of weighing warehouse-in.
3. the production method of stainless screw-thread steel according to claim 1, it is characterized in that: described in wear water-cooling apparatus, comprise inlet tube, entrance bearing, entrance base, connecting duct, outlet bearing, outlet, outlet base, total length 1.7m, in entrance bearing, establish cooling water nozzle, nozzle inside diameter 10mm, is the angle of 11 °～15 ° with workpiece to be cooled, by entrance base, is fixed on memorial archway crossbeam; Outlet bearing is connected with entrance bearing by connecting duct, outlet bearing is provided with the osculum of two caliber 40mm, by outlet base, be fixed on memorial archway crossbeam, outlet bearing rear portion outlet, the inner contrainjector of installing, nozzle inside diameter 8mm, stops cooling water to flow out from water cooling plant, by osculum, discharges.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103978030A (en) * | 2014-05-19 | 2014-08-13 | 中冶赛迪工程技术股份有限公司 | Production process device for rebar with ribs at three sides |
| CN104357733A (en) * | 2014-12-02 | 2015-02-18 | 浙江富钢金属制品有限公司 | Production method of stainless twisted steel |
| CN108714623A (en) * | 2018-05-14 | 2018-10-30 | 盐城市联鑫钢铁有限公司 | A kind of process for solving the problems, such as large gauge ribbed bar clod wash and splitting |
| CN108856339A (en) * | 2018-06-11 | 2018-11-23 | 江苏明璐不锈钢有限公司 | A kind of production method of stainless steel bars |
| CN109433832A (en) * | 2018-10-25 | 2019-03-08 | 盐城市联鑫钢铁有限公司 | It solves screw-thread steel screw thread during mantle fiber and the process of gap problem occurs |
| CN109731911A (en) * | 2019-01-30 | 2019-05-10 | 福建泉州闽光钢铁有限责任公司 | A method of improving Screwbar muscle head performance |
| CN110314942A (en) * | 2019-06-10 | 2019-10-11 | 南京钢铁股份有限公司 | The process of hot rolled circular steel control bearing steel dimensions scattered error |
| CN110695123A (en) * | 2019-10-18 | 2020-01-17 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Preparation process of duplex stainless steel medium plate |
| CN110773569A (en) * | 2019-10-18 | 2020-02-11 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Preparation process of S32750 super duplex stainless steel coiled plate |
| CN111760907A (en) * | 2020-06-18 | 2020-10-13 | 建龙北满特殊钢有限责任公司 | Controlled rolling and cooling method for carbon structural steel |
| CN112170492A (en) * | 2020-09-24 | 2021-01-05 | 宁夏建龙龙祥钢铁有限公司 | Many segmentations production minus tolerance stabilising arrangement |
| CN114618889A (en) * | 2022-03-23 | 2022-06-14 | 首钢水城钢铁（集团）有限责任公司 | Bar hot rolling production method capable of avoiding steel punching accident of No. 17 rolling mill |
| CN115634926A (en) * | 2022-10-28 | 2023-01-24 | 福建三钢闽光股份有限公司 | Method for solving low head temperature of bar intermediate control cold-rolled part |
| CN116445829A (en) * | 2023-06-16 | 2023-07-18 | 中国矿业大学(北京) | Corrosion-resistant anchor rod and production process thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05115914A (en) * | 1991-10-28 | 1993-05-14 | Nippon Steel Corp | Method and device for water cooling bar steel/wire rod |
| CN1213592A (en) * | 1998-08-31 | 1999-04-14 | 唐山钢铁集团有限责任公司 | Two-line cutting/rolling tech. for screwed steel |
| CN2524851Y (en) * | 2001-08-22 | 2002-12-11 | 任吉堂 | Strong through water cooler for hot rolling rod line material production line |
| CN1793389A (en) * | 2005-12-26 | 2006-06-28 | 广州双菱钢铁工业有限公司 | Process for producing British standard 460 grade thread reinforcing steel by ordinary carbon steel |
| CN102626712A (en) * | 2012-05-08 | 2012-08-08 | 山西太钢不锈钢股份有限公司 | Rolling equipment and method for stainless threaded steel |
| JP2013006190A (en) * | 2011-06-23 | 2013-01-10 | Kobe Steel Ltd | Rolling method of bar steel |
-
2013
- 2013-11-07 CN CN201310545482.4A patent/CN103551404B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05115914A (en) * | 1991-10-28 | 1993-05-14 | Nippon Steel Corp | Method and device for water cooling bar steel/wire rod |
| CN1213592A (en) * | 1998-08-31 | 1999-04-14 | 唐山钢铁集团有限责任公司 | Two-line cutting/rolling tech. for screwed steel |
| CN2524851Y (en) * | 2001-08-22 | 2002-12-11 | 任吉堂 | Strong through water cooler for hot rolling rod line material production line |
| CN1793389A (en) * | 2005-12-26 | 2006-06-28 | 广州双菱钢铁工业有限公司 | Process for producing British standard 460 grade thread reinforcing steel by ordinary carbon steel |
| JP2013006190A (en) * | 2011-06-23 | 2013-01-10 | Kobe Steel Ltd | Rolling method of bar steel |
| CN102626712A (en) * | 2012-05-08 | 2012-08-08 | 山西太钢不锈钢股份有限公司 | Rolling equipment and method for stainless threaded steel |
Cited By (19)
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| CN103978030B (en) * | 2014-05-19 | 2016-05-04 | 中冶赛迪工程技术股份有限公司 | The production process equipment of a kind of three side spiral with ribbing |
| CN103978030A (en) * | 2014-05-19 | 2014-08-13 | 中冶赛迪工程技术股份有限公司 | Production process device for rebar with ribs at three sides |
| CN104357733A (en) * | 2014-12-02 | 2015-02-18 | 浙江富钢金属制品有限公司 | Production method of stainless twisted steel |
| CN108714623A (en) * | 2018-05-14 | 2018-10-30 | 盐城市联鑫钢铁有限公司 | A kind of process for solving the problems, such as large gauge ribbed bar clod wash and splitting |
| CN108856339A (en) * | 2018-06-11 | 2018-11-23 | 江苏明璐不锈钢有限公司 | A kind of production method of stainless steel bars |
| CN109433832A (en) * | 2018-10-25 | 2019-03-08 | 盐城市联鑫钢铁有限公司 | It solves screw-thread steel screw thread during mantle fiber and the process of gap problem occurs |
| CN109731911B (en) * | 2019-01-30 | 2020-07-17 | 福建泉州闽光钢铁有限责任公司 | Method for improving performance of head of twisted steel wire rod |
| CN109731911A (en) * | 2019-01-30 | 2019-05-10 | 福建泉州闽光钢铁有限责任公司 | A method of improving Screwbar muscle head performance |
| CN110314942A (en) * | 2019-06-10 | 2019-10-11 | 南京钢铁股份有限公司 | The process of hot rolled circular steel control bearing steel dimensions scattered error |
| CN110695123A (en) * | 2019-10-18 | 2020-01-17 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Preparation process of duplex stainless steel medium plate |
| CN110773569A (en) * | 2019-10-18 | 2020-02-11 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Preparation process of S32750 super duplex stainless steel coiled plate |
| CN111760907A (en) * | 2020-06-18 | 2020-10-13 | 建龙北满特殊钢有限责任公司 | Controlled rolling and cooling method for carbon structural steel |
| CN111760907B (en) * | 2020-06-18 | 2022-03-22 | 建龙北满特殊钢有限责任公司 | Controlled rolling and cooling method for carbon structural steel |
| CN112170492A (en) * | 2020-09-24 | 2021-01-05 | 宁夏建龙龙祥钢铁有限公司 | Many segmentations production minus tolerance stabilising arrangement |
| CN114618889A (en) * | 2022-03-23 | 2022-06-14 | 首钢水城钢铁（集团）有限责任公司 | Bar hot rolling production method capable of avoiding steel punching accident of No. 17 rolling mill |
| CN114618889B (en) * | 2022-03-23 | 2024-04-16 | 首钢水城钢铁（集团）有限责任公司 | Bar hot rolling production method capable of avoiding 17 # rolling mill steel punching accident |
| CN115634926A (en) * | 2022-10-28 | 2023-01-24 | 福建三钢闽光股份有限公司 | Method for solving low head temperature of bar intermediate control cold-rolled part |
| CN116445829A (en) * | 2023-06-16 | 2023-07-18 | 中国矿业大学(北京) | Corrosion-resistant anchor rod and production process thereof |
| CN116445829B (en) * | 2023-06-16 | 2023-09-08 | 中国矿业大学(北京) | Corrosion-resistant anchor rod and production process thereof |
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