RU2334571C2 - Method of conversion pipe manufacturing in pipe rolling plants with pilger mills of low-elasticity steel with boron content of 1,3-1,8% - Google Patents

Method of conversion pipe manufacturing in pipe rolling plants with pilger mills of low-elasticity steel with boron content of 1,3-1,8% Download PDF

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RU2334571C2
RU2334571C2 RU2006139464/02A RU2006139464A RU2334571C2 RU 2334571 C2 RU2334571 C2 RU 2334571C2 RU 2006139464/02 A RU2006139464/02 A RU 2006139464/02A RU 2006139464 A RU2006139464 A RU 2006139464A RU 2334571 C2 RU2334571 C2 RU 2334571C2
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rolling
pipes
thickness
pipe
pilgrim
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RU2006139464/02A
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RU2006139464A (en
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нов Анатолий Васильевич Сафь (RU)
Анатолий Васильевич Сафьянов
Александр Анатольевич Фёдоров (RU)
Александр Анатольевич Фёдоров
Владимир Ильич Горнштейн (RU)
Владимир Ильич Горнштейн
Дмитрий Всеволодович Марков (RU)
Дмитрий Всеволодович Марков
Леонид Игнатьевич Лапин (RU)
Леонид Игнатьевич Лапин
Сергей Васильевич Ненахов (RU)
Сергей Васильевич Ненахов
Валерий Александрович Головинов (RU)
Валерий Александрович Головинов
Виктор Николаевич Еремин (RU)
Виктор Николаевич Еремин
Николай Петрович Климов (RU)
Николай Петрович Климов
Валерий Андреевич Логовиков (RU)
Валерий Андреевич Логовиков
Константин Эдуардович Бубнов (RU)
Константин Эдуардович Бубнов
Александр Юрьевич Матюшин (RU)
Александр Юрьевич Матюшин
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ОАО "Челябинский трубопрокатный завод"
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Abstract

FIELD: technological processes.
SUBSTANCE: method involves ingot casting by electroslag refining; turning and drilling of central hole in ingots; ingot heating to the elasticity temperature; piercing at piercing mill to form shells; shell rolling at pilger mill to form conversion pipes of 290x12x23000-24000 mm dimensions. Rolling of front ends at (1.0-1.2) Lrec length is performed for Sf=Sy+K wall width, and rolling of rear ends at (1.2-1.5) Lrec length is performed for Sr=Sy-K1 wall width, where Lrec=1100-1150 is recoil distance of feeder during rolling 290 mm diameter pipes in rolls with 980 mm barrel diameter, mm; Sf is front end pipe wall thickness, mm; Sy=12 is rated wall thickness of conversed pipes for regular rolling process, mm; Sr is rear end pipe wall thickness, mm; K=(2-3) is growth factor of pipe wall thickness during front end rolling, mm; Kl=(0.5-0.8) is diminishment factor of pipe wall thickness during rear end rolling, mm.
EFFECT: reduced metal expenditure and cost of commercial hexagon pipes.
1 tbl

Description

The invention relates to pipe production, in particular to a method for the production of conversion pipes from low ductility steel with a boron content of 1.3-1.8% (ES 82), and can be used in the production of seamless hot-rolled conversion pipes in tube-rolling plants with pilgrim mills.

In pipe production, there is a known method for the production of steel tubes from low-ductility steel with a boron content of 1.3-1.8% (ChS 82), which involves the smelting of steel by vacuum-arc (VD), vacuum-induction (VI), vacuum-induction followed by vacuum -arc remelting (ID) and plasma remelting (R) into ingots with a diameter of 460 mm, followed by forging them into bars (blanks) with a diameter of 225-230 mm and machining (turning) to a size of 215 × 1850-1950 mm, heating to a plasticity temperature , firmware in the firmware mill on TPA-350 with an automatic mill ohm in sleeves of size 220 × 45 × 2700-2850 mm, cooling, repair, firmware on the first piercing mill in sleeves of size 250 × 28 × 3400-3600 mm, firmware on the second mill in sleeves of size 292 × 13 × 5600-5950 mm, rolling in an automatic mill in three passes with reductions of 14.3%, 8.3%, 0.5%, respectively, and calibration in a calibration mill into pipes of 288 × 11 mm in size at a temperature of 850-950 ° С (Research report " Mastering the production technology of hot-rolled large-diameter pipes from steel ChS 82 in the conditions of TPA-350 "UTZ", Dnepropetrovsk 1988).

The disadvantages of this method are interstate transportation (Chelyabinsk - Nikopol - Chelyabinsk), the laborious operation of forging ingots with a diameter of 460 mm into bars (billets) with a diameter of 225-230 mm, followed by machining (turning) and cutting to a size of 215 × 1850-1950 mm, large the expenditure coefficient of the metal during the redistribution of the ingot-hexagonal billet equal to 6.53 and, as a consequence, the high cost of conversion pipes and finished products (hexagonal billets).

In pipe production, there is also known a method of manufacturing pipe blanks for the manufacture of hexagonal jacketed tubes from low-alloy nickel-free steel with a boron content of 1.3-1.8%, including drilling a central hole with a diameter of 100 mm in ESR ingots measuring 460-480 × 1600-1750 mm, heating them to the temperature of ductility, flashing in the piercing mill TPA8-16 of ChTPZ OJSC into sleeves of 460 × 110 × 2100-2300 mm in size, rolling the sleeves on a pilgrim mill into blanks of 377 × 88.5 × 3200-3600 mm in size , cooling workpieces and their repair (if necessary), pipe cutting - blanks for two cuts - blanks measuring 377 × 88.5 × 1575-1750 mm, reheating them to the temperature of plasticity, piercing (rolling) in a piercing mill into sleeves 400 × 50 × 2300-2550 mm in size, and then rolling on a pilgrim stand in the conversion pipe size 290 × 12 × 11000-12000 mm and dressing on a straightening machine at a temperature not lower than 100 ° C, using the temperature of the rolling heating (RF Patent No. 2226133, bull. No. 9, 2004).

The known method has the following disadvantages. The technological process for the production of conversion pipes from ChS 82 steel, which includes two heating, two firmware, two rolling at a pilgrim mill and cutting pipe blanks into two equal round billets, is time consuming, which leads to an increase in the price of conversion pipes and , as a result, to the increase in the price of hexagonal shell pipes. Rolling two krat-billets of 377 × 88.5 × 1600–1800 mm in size, obtained from one ingot, in a pilgrim mill to conversion pipes of 290 × 12 × 11500-12500 mm in size leads to an increase in technological waste in the form of two seed ends and two pilgrim heads. With an unsteady rolling process, i.e. when seeding and rolling in the pilgrim heads, end defects in the form of longitudinal cracks and flaws in the length of 0.5-0.8 meters are formed due to the low plasticity of the steel. This leads to an increase in the expenditure coefficient of the metal during the redistribution of the ESR ingot — the conversion tube. Rolling on a pilgrim mill of pipes measuring 290 × 12 × 11500-12500 mm from liners of 400 × 50 × 2300-2550 mm in size for 3.0-3.2 minutes reduces the temperature of the liner to 750 ° C, i.e. rolling of pipe ends occurs at a temperature of 750-800 ° C, and this is significantly lower than the lower limit of the ductility interval of this steel grade (800-850 ° C), which leads to the formation of flaws under the pilgrim head on a length of 2.0-3.0 meters, and this in turn leads to the marriage of one krat, as the minimum length of the pipe for profiling (redistribution into a hexagon) should be 5250 mm.

The closest technical solution is a method for the production of steel tubes from low plastic steel with a boron content of 1.3-1.8%, including drilling ESR ingots with a diameter of 460-480 mm from the bottom end to a length L = Н-В, where Н is the height of the ingot, mm; C - the not drilled part of the ingot, equal to 100-120 mm, keeping the ingots at a temperature of 450-500 ° C on the grates of the methodical furnaces without tilting for 90-120 min, heating them to a temperature of 800-850 ° C at a speed of 1.8- 2.0 ° C per minute, then heated to a plasticity temperature of 1060-1090 ° C at a speed of 2.1-2.2 ° C per minute with a tilting in 15-20 minutes and keeping at this temperature for 70-80 minutes tilting at an angle of ≈180 ° in 10-15 minutes, lubricant supply into the ingots in the form of a mixture of graphite with sodium chloride (50/50)% weighing 300-500 g, piercing the ingots with the drilled end forward by an exhaust hood of 1.6-1.75 without raising in diameter, maintaining a steady-state firmware process with a roll rotation speed of 40-45 rpm when filling the deformation zone, reducing the roll rotation speed, from capturing the workpiece by rolls until the sleeve is completely on the mandrel, by 20 -25% -20-35 revolutions per minute, and at the output of the workpiece from the deformation zone, a decrease in speed by 30-35% -25-30 revolutions per minute, rolling of sleeves with a size of 460 × 80 × 2650 mm on a pilgrim mill in redox pipes with an exhaust hood μ = 9.0-10.5 and compression in diameter of 35-40%, seed and dokatka - run-in saw make-up heads with a hood μ = 7.5-8.5, equal to 0.8-0.85 of the amount of drawing of a steady rolling process, reduction of drawing when seeding for a length of 1.0 -1.1, and when rolling pilgrim heads for a length of 0 , 3-0.5 ways to roll back the feeding apparatus due to the breeding of the rolls of the pilgrim mill.

The use of sleeves with a size of 460 × 80 × 2650 mm instead of 400 × 50 × 2300-2550 mm when rolling conversion tubes on pilgrim mills of 290 × 12 mm in size from ChS 82 steel has, along with advantages, also disadvantages, as leads to an increase in the drawing ratio from 5.2 to 9.1, i.e. 1.75 times. An increase in the hood in the production of conversion pipes from low-ductility steel with a boron content of 1.3-1.8% leads to the formation of defects in the form of flaws, especially in an unsteady rolling process, namely when seeding. The reduction of hoods during seeding from 9.1 to 7.5 does not give a positive effect and is not technologically advanced for rolling mill pilgrim mills, because they lead the rolling process along the wall thickness, which is set according to the program on new feeders, and on the old ones (existing in Russia and the CIS countries) they are set according to the divisions on the drum of the pressure device and then compared with the actual measurements of wall thicknesses by OTC controllers. The seed liners with a size of 460 × 80 × 2650 mm with a hood μ = 7.5-8.5 leads to the formation of flaws at the front ends of the pipes (unsteady rolling process) over a length of 1500 to 2000 mm or a length equal to 1.3 1.75 L opening feed unit. An increase in the wall thickness from 50 to 80 mm makes it possible to complete the rolling process (break-in of pilgrim heads) at a temperature above 800 ° C, which means that this temperature range corresponds to the ductility interval of this steel grade. Because the rolling process of redistribution tubes from ChS 82 steel is carried out with carbon rings, then during rolling-in-testing of pilgrim heads it becomes possible to thin the wall.

The objective of the proposed method is the development of a new technological process for the production of steel tubes from low ductility steel with a boron content of 1.3-1.8% on TPA 8-16 "with pilgrim mills, reducing the proportion of process waste (seed ends and pilgrim heads), the amount of rejects flaws at the seed ends, thinning of the wall instead of thickening during rolling - running-in of the pilgrim heads, reduction of the expenditure coefficient of the metal during the redistribution of the ESR ingot - the conversion pipe billet, and therefore, the cost reduction The end product is hexagonal steel pipes ChS 82.

The technical result is achieved by the fact that in the known method for the production of redistribution tubes in pipe rolling plants with pilgrim mills of low plastic steel with a boron content of 1.3-1.8%, including ingots casting by electroslag remelting, turning and drilling of the central hole in the ingots, heating the ingots to ductility temperatures, piercing in the piercing mill into sleeves, rolling the sleeves on the pilgrim mill into porcelain pipes measuring 290 × 12 × 23000-24000 mm, the seed - rolling the front ends of the conversion pipes at a length equal to (1, 0-1.2) L open , produced with a wall thickness S z = S y + K, and rolling - rolling the rear ends of the pipes - under the pilgrim head at a length equal to (1.2-1.5) L open , is performed with wall thickness S r = S y -K 1, where L = 1100-1150 TCI - quantity feeder apparatus recoil path during the rolling of pipes of 290 mm diameter rolls in a barrel diameter 980 mm, mm; S z - wall thickness of the front - seed ends of the pipes, mm; S y = 12 is the nominal wall thickness of the conversion pipes during the steady rolling process, mm; S g - wall thickness of the rear ends of the pipes - under the pilgrim head, mm; K = (2-3) is the coefficient of increase in the wall thickness of the pipes during seeding - rolling the front ends of the pipes, mm; K 1 = (0.5-0.8) is the coefficient of thinning of the wall thickness of the pipes during rolling - rolling of the rear ends, mm

The method consists in the fact that in order to reduce or completely eliminate the flaws on the bare ends of the front ends of pipes rolling of mother tubes over a length equal to (1,0-1,2) L TCI, produced with a wall thickness of 14-15 mm instead of 12 mm wall and rolling - rolling the rear ends of the pipes - under the pilgrim head at a length equal to (1.2-1.5) L opening , is performed with a wall thickness of 11.2-11.5 instead of 13.0-14 mm according to the existing method, which made it possible to significantly reduce defects in flaws of the front - seed ends of pipes, to reduce the wall thickness during rolling - running in of the back the ends of the pipes, reduce the expenditure coefficient of the metal during the redistribution of the ESR ingot - the conversion pipe, and, consequently, the cost of conversion pipes and hexagonal billets.

Comparative analysis with the prototype shows that the inventive method for the production of pig tubes in pipe rolling plants with pilgrim mills made of low plastic steel with a boron content of 1.3-1.8% differs from the known one in that the seed is rolling the front ends of the pig tubes at a length equal to ( 1,0-1,2) L open , produced with a wall thickness S z = S y + K, and rolling - the rolling of the rear ends of the pipes - under the pilgrim head at a length equal to (1.2-1.5) L open , produced with a wall thickness S r = S y -K 1, where L = TCI 1100-1150 - the feed path value ann rollback paratus during the rolling of pipes of 290 mm diameter rolls in a diameter of 980 mm barrel, mm; S z - wall thickness of the front - seed ends of the pipes, mm; S y = 12 is the nominal wall thickness of the conversion pipes during the steady rolling process, mm; S g - wall thickness of the rear ends of the pipes - under the pilgrim head, mm; K = (2-3) is the coefficient of increase in the wall thickness of the pipes during seeding - rolling of the front ends of the pipes, mm; K 1 = (0.5-0.8) is the coefficient of thinning of the wall thickness of the pipes during rolling - rolling of the rear ends, mm Thus, these differences allow us to conclude that the criterion of "inventive step" is met.

Comparison of the proposed method not only with the prototype, but also with other technical solutions in this technical field, did not reveal the signs that distinguish the claimed method from the prototype, which corresponds to the patentability of "inventive step".

The method was tested and implemented on an 8-16 "pipe rolling machine with Pilgrim mills of ChTPZ OJSC. Using this method, for the first time in 2006, high-quality conversion pipes were obtained with dimensions of 290 × 12 × 23000-24000 mm for the manufacture of hexagonal jacketed tubes made of low plastic steel with boron content of 1.3-1.8% (ES 82).

40 ingots of ESR steel of the ChS 82 grade delivered by ZMZ OJSC were set into production, of which: 20 ingots of 460 × 100 × 1750 mm in size (20 converting pipes of 290 × 12 × 22000-23000 mm in size, which were cut into hot cutting saws into two relatively equal parts) are rolled according to the existing technology, and 20 ingots are rolled into conversion pipes using the proposed technology. The data on rolling and delivery of conversion pipes made of ChS 82 steel measuring 290 × 12 × 22000-23000 mm from ESR ingots rolled at TPA 8-16 by OAO ChTPZ according to the existing and proposed methods are given in the table.

It can be seen from the table that when rolling conversion tubes using the existing technology, the seed process at a length equal to 1.05 of the rollback path of the feeding apparatus (1210 mm) was carried out with a hood μ = 7.37, versus μ = 9.1 with a steady rolling process pipes on the pilgrim mill, which amounted to 0.81 from the steady rolling process, and the pilgrim heads were run-in (rolled) at a length equal to 0.4 of the rollback path of the feeding apparatus (460 mm), with a hood μ = 7.3, i.e. . with a thicker wall. As a result, out of 20 redistribution pipes - lashes 290 × 12 × 22000-23000 mm in size, there were longitudinal flaws of 1.5 m or more in length at 8 from the seed end, which led to the loss of 8 krats in length (krat length was less than 5.2 meters , instead of 6.0 by TI). The expenditure coefficient of metal for redistribution pipes of this batch (the ratio of the weight of a given metal to the weight of shipped pipes for further processing in workshop No. 5) was 1.438. According to the proposed technology, the production process before rolling the conversion pipes on the pilgrim mill is similar to the existing one. According to the proposed technology, the seed (rolling of the front ends of the pipes) at a length equal to (1.0-1.2) the path of the rollback of the feeding apparatus (1150-1350) mm was produced with a wall thickness of 14.0-14.5 mm, which the roller sets according to the divisions of the drum of the pressure device, i.e. can control during the rolling process. When running (rolling) the pilgrim heads at temperatures above 850 ° C, which is in the ductility range for this steel grade, and using underlay carbon rings, the wall thickness of the transfer pipes relative to the nominal value was reduced to (11.2-11.5) mm on a length equal to (1.2-1.5) mm rollback of the feeding apparatus (1240-1725) mm. According to the proposed technology, the size of the cut off seeds did not exceed 600 mm for all 20 converting pipes - lashes of 290 × 12 × 22000-23000 mm in size. All pipes - lashes were cut by a hot cutting saw into two equal parts, i.e. 40 pipes, which in workshop No. 5 were cut into 80 pipes - krats measuring 290 × 12 × 5500-5750 mm. The expenditure coefficient of the metal through the conversion pipes of this batch was 1.295, i.e. 143 kg of metal was saved per tonne of conversion pipes.

Thus, according to the proposed method for the production of redistribution pipes in tube rolling plants with pilgrim mills of low ductility steel with a boron content of 1.3-1.8%, a decrease in metal consumption by hot rolling by 143 kg is obtained.

Using the proposed method for the production of redistribution pipes in tube rolling plants with pilgrim mills of low ductility steel with a boron content of 1.3-1.8% will significantly reduce metal consumption by reducing the number of end defects at the seed ends in the form of cracks and flaws, and reduce pipe wall thickness under the pilgrim head, and therefore, reduce the cost of marketable hexagonal pipes made of steel ChS 82.

Table Data on rolling and delivery of conversion pipes from ChS 82 steel measuring 290 × 12 × 22000-23000 mm from ESR ingots rolled at TPA 8-16 by OAO ChTPZ according to the existing and proposed methods Way to hire.
before. pipes
Laminated ingots (pcs) Ingot Size (mm) ESR ingots heating for flashing and rolling ESR Ingot Firmware Parameters Firmware notes Pipe mill rolling on a pilgrim mill The expenditure coefficient of the metal during the redistribution of the ingot ESR-conversion pipe
Heating parameters Temperature Discharge of ingots from the furnace (° C) Temperature beginning and end of rolling (° C) Rolling parameters Rolling notes one 2 3 four 5 6 7 8 9 10 eleven Existence.
the way
twenty 460 × 100 × 1750 1. Exposure at a temperature of 450-500 ° C on the grates of the furnace for 100-110 minutes.
2. Heating to a temperature of 800-850 ° C at a speed of 1.8-2.0 ° C per minute.
3. Heating to a temperature of 1050-1090 ° C with a heating rate of 2.1-2.2 ° C per minute.
4. Exposure at a temperature of 1050-1090 ° C for 70-80 minutes.
5. Tilting at a holding temperature after 10-15 minutes at an angle of ≈180 °.
6. The total heating time is 8.25-9.0 hours.
1050-1090 1. Lubrication inside an unfilled ingot weighing 300-500 g.
2. Firmware ingots bottom bottom forward.
3. The size of the sleeves 460 × 80 × 2650 mm.
4. The drawing coefficient μ = 1.66.
5. The number of revolutions of the rolls, rpm
- at the entrance-35;
- mouth process 40;
- at the exit - 30.
There are no comments. Sleeves are straight and without defects 1080-870 1. The size of the pipes is 290 × 12 × 22000-23000 mm.
2. The drawing coefficient μ = 9.1.
3. The coefficient of extraction when seed on a length of 1.05 rollback paths
feeding apparatus (1210 mm) μ = 6.37.
4. The coefficient of extraction during the running of the pilgrim heads at a length of 0.4 rollback path of the feeding apparatus (460 mm) μ = 7.3
The seed ends on a length of 0.6 to 1.5 m had longitudinal flaws, which is why 72 1,438
Suggestion way twenty 460 × 100 × 1750 1. Exposure at a temperature of 450-500 ° C on the grates of the furnace for 90-100 minutes.
2. Heating to a temperature of 800-850 ° C at a speed of 1.8-2.0 ° C per minute.
3. Heating to a temperature of 1050-1090 ° C with a heating rate of 2.1-2.2 ° C per minute.
4. Exposure at a temperature of 1050-1090 ° C for 70-80 minutes.
5. Tilting at holding temperature after 10-15 minutes
at ≈180 °.
6. The total heating time of 8.45-9.5 hours.
1045-1090 1. Lubrication inside an unfilled ingot weighing 300-500 g.
2. Firmware ingots bottom bottom forward.
3. The size of the sleeves 460 × 80 × 2650 mm.
4. The drawing coefficient μ = 1.66.
5. The number of revolutions of the rolls, rpm:
- at the entrance-35;
- ust.process-40;
- at the exit - 30.
There are no comments. Sleeves are straight and without defects 1090-880 1. The size of the pipes is 290 × 12 × 22000-23000 mm
2. The drawing coefficient μ = 9.1.
3 The wall thickness when seeding along the length (1.0-1.2) of the rollback path of the feeding apparatus (1150 -1350 mm) Sz = 14.0 -14.5 mm.
4. The wall thickness when running the pilgrim heads on the length (1.2 - 1.5) of the rollback path
feeding apparatus (1240-1725 mm) Sg = (11.2 -11.5) mm
There were no longitudinal flaws at the seed ends of the pipes. The technological trimmed 500-600 mm long was cut off. Out of 80 kratas, all 80 krats were eligible for rental 1395

Claims (1)

  1. Method for the production of redistribution pipes in tube-rolling plants with pilgrim mills of low plastic steel with a boron content of 1.3-1.8%, including ingot casting by electroslag remelting, turning and drilling of the central hole in the ingots, heating the ingots to a plasticity temperature, flashing in a piercing mill in sleeves, rolling sleeves on a pilgrim mill into porous pipes measuring 290 × 12 × 23000-24000 mm, characterized in that the rolling of the front ends of the pipes at a length equal to (1.0-1.2) L opening is performed with a wall thickness
    S s = S y + K,
    and rolling the rear ends of the pipes - under the pilgrim head at a length equal to (1.2-1.5) L opening , produce with a wall thickness
    S g = S y -K 1 ,
    where L open = 1100-1150 is the value of the rollback path of the feeding apparatus when rolling pipes with a diameter of 290 mm, in rolls with a barrel diameter of 980 mm, mm;
    S z - wall thickness of the front ends of the pipes, mm;
    Su = 12 is the nominal wall thickness of the pipes during the steady rolling process, mm;
    S g - wall thickness of the rear ends of the pipes - under the pilgrim head, mm;
    K = (2-3) is the coefficient of thickening of the pipe wall when rolling the front ends of the pipes, mm;
    K 1 = (0.5-0.8) is the coefficient of thinning of the pipe wall during rolling of the rear ends, mm
RU2006139464/02A 2006-11-07 2006-11-07 Method of conversion pipe manufacturing in pipe rolling plants with pilger mills of low-elasticity steel with boron content of 1,3-1,8% RU2334571C2 (en)

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RU2470725C1 (en) * 2011-06-03 2012-12-27 Открытое акционерное общество "Научно-производственное объединение "Центральный научно-исследовательский институт технологии машиностроения" (ОАО НПО "ЦНИИТМАШ") METHOD OF MAKING 290×12 mm-TUBE STOCK FROM OF SOLID INGOTS FROM ELECTROSLAG REMELTING OF 04×14T5P2"Ф-Ш" -GRADE LOW-DUCTILE STEEL
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RU2470724C1 (en) * 2011-06-03 2012-12-27 Открытое акционерное общество "Научно-производственное объединение "Центральный научно-исследовательский институт технологии машиностроения" (ОАО НПО "ЦНИИТМАШ") METHOD OF MAKING HEXAGONAL TUBE BILLETS SIZED TO 257+2,0/-3,0×6,0+2,0/-1,0×4300+80/-30 mm INTENDED FOR STORAGE AND TRANSPORTATION OF SPENT NUCLEAR FUEL
RU2511199C1 (en) * 2012-11-21 2014-04-10 Открытое акционерное общество "Челябинский трубопрокатный завод" Method of producing of tube stock sized to 290x12 mm to specs 8-16
RU2530085C2 (en) * 2012-12-21 2014-10-10 Открытое акционерное общество "Челябинский трубопрокатный завод" PRODUCTION OF SEAMLESS REROLLED PIPES SIZED TO 289×11,5×26000-27000 AND 290×12×26000-27500 mm AT PRU 8-16" WITH PILGER MILLS FROM ESR INGOTS-BILLETS OF LOW-DUCTILITY "04Х14Т3Р1Ф-Ш" AND "04Х14Т5Р2Ф-Ш"-GRADE STEELS WITH BORON CONTENT OF 1,3-3,5% FOR PRODUCTION OF HEXAGONAL PIPES-BILLETS SIZED TO TURNKEY BASIS OF 257+2,0/-3,0×6,0+2,0/-1,0×4300+80/-30 mm FOR COMPACT STORAGE IN NUCLEAR POWER STATION COOLING POND AND TRANSPORTATION OF USED NUCLEAR FUEL
RU2547363C1 (en) * 2013-12-09 2015-04-10 Открытое акционерное общество "Челябинский трубопрокатный завод" METHOD OF PROCESS PIPES PRODUCTION OF SIZE 284×11 mm OUT OF SOLID BLANK INGOTS TO MANUFACTURE HEX BLANK PIPES WITH TURNKEY SIZE 252,6×5,0+1,5/-1,0×4300+80/-30 mm FOR TIGHT STORAGE AND TRANSPORTATION OF SPENT NUCLEAR FUEL
RU2547760C1 (en) * 2013-10-22 2015-04-10 Открытое акционерное общество "Челябинский трубопрокатный завод" PRODUCTION OF "TURNKEY" 255×5,0+1,5/-1,0×4300+80/-30 mm HEXAGONAL PIPE-BILLETS
RU2550032C2 (en) * 2013-01-22 2015-05-10 Общество с ограниченной ответственностью "Технологии энергетического машиностроения" (ООО "ТЭМ") PRODUCTION OF REROLLED 290×12 mm PIPES AT PRU 8-16" WITH PILGER MILLS FROM ESR INGOTS-BILLETS OF LOW-DUCTILITY "04Х14Т3Р1Ф-Ш"- AND "04Х14Т5Р2Ф-Ш"-GRADE STEELS WITH BORON CONTENT OF 1,3-3,5% FOR FABRICATION OF HEXAGONAL TURNKEY PIPE BILLETS SIZED TO 257+2,0/-3,0×6,0+2,0/-1,0×4300+80/-30 mm FOR RACKS OF NUCLEAR POWER STATION USED FUEL COOLING POND
RU2550033C2 (en) * 2013-01-22 2015-05-10 Общество с ограниченной ответственностью "Технологии энергетического машиностроения" (ООО "ТЭМ") PRODUCTION OF REROLLED 292×12 mm PIPES AT PRU 8-16" WITH PILGER MILLS FROM ESR INGOTS-BILLETS OF LOW-DUCTILITY "04Х14ТЗР1Ф-Ш"- AND "04Х14Т5Р2Ф-Ш"-GRADE STEELS WITH BORON CONTENT OF 1,3-3,5% FOR FABRICATION OF HEXAGONAL TURNKEY PIPE BILLETS SIZED TO 257+2,0/-3,0×6+2,0/-1,0×4300+80/-30 mm FOR STORAGE AT RACKS OF NUCLEAR POWER STATION USED FUEL COOLING POND AND ITS TRANSPORTATION
RU2618687C1 (en) * 2016-03-22 2017-05-10 Комаров Андрей Ильич Hexagon steel pipe-billet with boron content of 1,3 to 3,0% and method of its manufacture
RU2696801C1 (en) * 2018-10-24 2019-08-06 Акционерное общество "Научно-производственное объединение "Центральный научно-исследовательский институт технологии машиностроения" АО "НПО "ЦНИИТМАШ" Method of production of rerolled pipes

Cited By (12)

* Cited by examiner, † Cited by third party
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RU2470726C1 (en) * 2011-06-03 2012-12-27 Открытое акционерное общество "Научно-производственное объединение "Центральный научно-исследовательский институт технологии машиностроения" (ОАО НПО "ЦНИИТМАШ") METHOD OF MAKING 257+2,0/-3,0×6,0+2,0/-1,0×4300+80/-30 mm-HEXAGONAL TUBE BILLETS FOR PACKED STORAGE AND TRANSPORTATION OF USED NUCLEAR FUEL
RU2470725C1 (en) * 2011-06-03 2012-12-27 Открытое акционерное общество "Научно-производственное объединение "Центральный научно-исследовательский институт технологии машиностроения" (ОАО НПО "ЦНИИТМАШ") METHOD OF MAKING 290×12 mm-TUBE STOCK FROM OF SOLID INGOTS FROM ELECTROSLAG REMELTING OF 04×14T5P2"Ф-Ш" -GRADE LOW-DUCTILE STEEL
RU2470723C1 (en) * 2011-06-03 2012-12-27 Открытое акционерное общество "Научно-производственное объединение "Центральный научно-исследовательский институт технологии машиностроения" (ОАО НПО "ЦНИИТМАШ") METHOD OF MAKING 257+2,0/-3,0×6,0+2,0/-1,0×4300+80/-30 mm-HEXAGONAL TUBE BILLETS
RU2470724C1 (en) * 2011-06-03 2012-12-27 Открытое акционерное общество "Научно-производственное объединение "Центральный научно-исследовательский институт технологии машиностроения" (ОАО НПО "ЦНИИТМАШ") METHOD OF MAKING HEXAGONAL TUBE BILLETS SIZED TO 257+2,0/-3,0×6,0+2,0/-1,0×4300+80/-30 mm INTENDED FOR STORAGE AND TRANSPORTATION OF SPENT NUCLEAR FUEL
RU2511199C1 (en) * 2012-11-21 2014-04-10 Открытое акционерное общество "Челябинский трубопрокатный завод" Method of producing of tube stock sized to 290x12 mm to specs 8-16
RU2530085C2 (en) * 2012-12-21 2014-10-10 Открытое акционерное общество "Челябинский трубопрокатный завод" PRODUCTION OF SEAMLESS REROLLED PIPES SIZED TO 289×11,5×26000-27000 AND 290×12×26000-27500 mm AT PRU 8-16" WITH PILGER MILLS FROM ESR INGOTS-BILLETS OF LOW-DUCTILITY "04Х14Т3Р1Ф-Ш" AND "04Х14Т5Р2Ф-Ш"-GRADE STEELS WITH BORON CONTENT OF 1,3-3,5% FOR PRODUCTION OF HEXAGONAL PIPES-BILLETS SIZED TO TURNKEY BASIS OF 257+2,0/-3,0×6,0+2,0/-1,0×4300+80/-30 mm FOR COMPACT STORAGE IN NUCLEAR POWER STATION COOLING POND AND TRANSPORTATION OF USED NUCLEAR FUEL
RU2550032C2 (en) * 2013-01-22 2015-05-10 Общество с ограниченной ответственностью "Технологии энергетического машиностроения" (ООО "ТЭМ") PRODUCTION OF REROLLED 290×12 mm PIPES AT PRU 8-16" WITH PILGER MILLS FROM ESR INGOTS-BILLETS OF LOW-DUCTILITY "04Х14Т3Р1Ф-Ш"- AND "04Х14Т5Р2Ф-Ш"-GRADE STEELS WITH BORON CONTENT OF 1,3-3,5% FOR FABRICATION OF HEXAGONAL TURNKEY PIPE BILLETS SIZED TO 257+2,0/-3,0×6,0+2,0/-1,0×4300+80/-30 mm FOR RACKS OF NUCLEAR POWER STATION USED FUEL COOLING POND
RU2550033C2 (en) * 2013-01-22 2015-05-10 Общество с ограниченной ответственностью "Технологии энергетического машиностроения" (ООО "ТЭМ") PRODUCTION OF REROLLED 292×12 mm PIPES AT PRU 8-16" WITH PILGER MILLS FROM ESR INGOTS-BILLETS OF LOW-DUCTILITY "04Х14ТЗР1Ф-Ш"- AND "04Х14Т5Р2Ф-Ш"-GRADE STEELS WITH BORON CONTENT OF 1,3-3,5% FOR FABRICATION OF HEXAGONAL TURNKEY PIPE BILLETS SIZED TO 257+2,0/-3,0×6+2,0/-1,0×4300+80/-30 mm FOR STORAGE AT RACKS OF NUCLEAR POWER STATION USED FUEL COOLING POND AND ITS TRANSPORTATION
RU2547760C1 (en) * 2013-10-22 2015-04-10 Открытое акционерное общество "Челябинский трубопрокатный завод" PRODUCTION OF "TURNKEY" 255×5,0+1,5/-1,0×4300+80/-30 mm HEXAGONAL PIPE-BILLETS
RU2547363C1 (en) * 2013-12-09 2015-04-10 Открытое акционерное общество "Челябинский трубопрокатный завод" METHOD OF PROCESS PIPES PRODUCTION OF SIZE 284×11 mm OUT OF SOLID BLANK INGOTS TO MANUFACTURE HEX BLANK PIPES WITH TURNKEY SIZE 252,6×5,0+1,5/-1,0×4300+80/-30 mm FOR TIGHT STORAGE AND TRANSPORTATION OF SPENT NUCLEAR FUEL
RU2618687C1 (en) * 2016-03-22 2017-05-10 Комаров Андрей Ильич Hexagon steel pipe-billet with boron content of 1,3 to 3,0% and method of its manufacture
RU2696801C1 (en) * 2018-10-24 2019-08-06 Акционерное общество "Научно-производственное объединение "Центральный научно-исследовательский институт технологии машиностроения" АО "НПО "ЦНИИТМАШ" Method of production of rerolled pipes

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