RU2620205C1 - METHOD OF PRODUCING SEAMLESS MACHINED PIPES WITH 530 ×19-24 mm SIZE FROM STEEL OF "08Х18Н10-Ш" GRADE - Google Patents

METHOD OF PRODUCING SEAMLESS MACHINED PIPES WITH 530 ×19-24 mm SIZE FROM STEEL OF "08Х18Н10-Ш" GRADE Download PDF

Info

Publication number
RU2620205C1
RU2620205C1 RU2016110305A RU2016110305A RU2620205C1 RU 2620205 C1 RU2620205 C1 RU 2620205C1 RU 2016110305 A RU2016110305 A RU 2016110305A RU 2016110305 A RU2016110305 A RU 2016110305A RU 2620205 C1 RU2620205 C1 RU 2620205C1
Authority
RU
Russia
Prior art keywords
pipes
size
rolling
diameter
blanks
Prior art date
Application number
RU2016110305A
Other languages
Russian (ru)
Inventor
Анатолий Васильевич Сафьянов
Original Assignee
Комаров Андрей Ильич
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Комаров Андрей Ильич filed Critical Комаров Андрей Ильич
Priority to RU2016110305A priority Critical patent/RU2620205C1/en
Application granted granted Critical
Publication of RU2620205C1 publication Critical patent/RU2620205C1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B19/00Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling Diescher mills, Stiefel disc piercers, Stiefel rotary piercers
    • B21B19/06Rolling hollow basic material, e.g. Assel mills

Abstract

FIELD: metallurgy.
SUBSTANCE: invention relates to the method of producing seamless machined pipes with 530×19-24 mm size from steel of "08Х18Н10-Ш" grade. The method includes casting hollow ingots by electroslag remelting size of 670×in.280×1900±50 mm, boring and turning them into hollow cakes with 650×in.300×1900±50 mm, heating ingot-blanks in the process furnace to a temperature of 1250-1260°C, the issuance of ingot-blanks from the furnace, lubrication from two ends of ingot-blanks with a mixture of graphite and common salt in a ratio of 50/50 mass equal to 1000-1250 g, piercing-rolling of ingot-blanks in the mill of cross-screw rolling with diametre of 490 mm into bushings of size 680×in.505×2900-3060 mm, rolling bushings on PPP 8-16" with pilgrim mills in disposal pipe sizes 550×40×5800-6200 mm, line of technological waste seed ends and pilgrim heads saw hot cutting, editing the correct six-high machine using rolling temperature of heating for passage to the 2-3 curvature of not more than 6.0 mm in total length of pipes, austenization, machining-boring and refacing metal recycling hot-rolled pipes measuring 550×40×5800-6200 mm in pipe sizes 530×19-24×5800-6200 mm.
EFFECT: reduction of a metal consumption coefficient.
2 cl, 1 tbl

Description

The invention relates to pipe rolling production, and in particular to a method for the production of seamless hot-rolled machined pipes with a size of 530 × 19-24 mm for nuclear power facilities from steel grade 08X18H10-Sh and can be used on TPU 8-16 '' with pilgrim mills in the manufacture of steelmaking hot-rolled pipes of size 550 × 40 × 5800-6200 mm from hollow ingots-blanks of electroslag remelting of size 650 × ext. 300 × 1900 ± 50 mm, for subsequent machining - boring and turning them into commodity pipes of size 530 × 19-24 × 5800 -6200 mm.

In pipe production, there is a known method for the production of commodity and conversion hot-deformed pipes of large and medium diameters from corrosion-resistant hard-deformed steel grades and alloys on TPU with pilgrim mills, including drilling a central hole with a diameter of 100 ± 5 mm in ESR ingots and billets, heating them to ductility temperatures, the first flashing of ESR ingots-blanks or blanks with a diameter of 460-600 mm in a cross-helical rolling mill with a hood μ = 1.2-1.4 at a speed of rotation of the work rolls of 15-25 rpm and the second and subsequent if necessary firmware - rolling with a rise or landing in diameter of not more than 5.0% and a hood μ = 1.4-1.75 at a roll speed of 20-50 rpm, using cold or hot landing of shell blanks into the furnace, the process of flashing from gripping ingot-blanks of ESR or blanks to being completely on the mandrel is carried out with a decrease in the number of revolutions of the work rolls from 25 to 15, the steady-state process of flashing at 15-20 rpm, and at the output of the shell blank their rolls, the number of revolutions is increased to 35-40 rpm, the flashing process is painting weaving (the second firmware) from capturing the billet sleeve to being completely on the mandrel leads to a decrease in the number of revolutions of the work rolls from 50 to 20, the steady rolling process at 20-25 rpm, and at the exit of the sleeve from the rolls the speed is increased to 45- 50, and pipe rolling on a pilgrim mill is carried out with an extractor μ = 3.0-5.0 (RF patent No. 2247612, 03/10/2005, bull. No. 7).

The disadvantage of this method is that it is aimed at the production of commodity mechanically processed pipes and does not stipulate the allowance for machining of conversion pipes for the manufacture of commodity mechanically processed pipes of high quality from corrosion-resistant steel 08X18H10-Sh for nuclear power facilities.

In the pipe industry, there is a known method for the production of seamless hot-deformed machined pipes of 245 × 19, 351 × 36, 415 × 50, 426 × 40, 426 × 50 and 436 × 45 mm sizes from ESR ingots-blanks of 08Kh18N10-Sh corrosion-resistant steel for nuclear power facilities with a bored inner and turned outer surface with a roughness of not more than R a 10 microns in accordance with GOST 2789 (TU 14-158-131-2002 "Hot-deformed pipes of high-quality corrosion-resistant steel").

The disadvantage of this method is that it is aimed at the production of commodity machined pipes with relatively thick walls. In the production of pipes of these sizes with a length of at least 4000 mm, the allowance for machining (boring and turning) should be at least 10 mm per side. Thus, during machining (boring and turning) with a roughness of not more than R a 10 μm, 111.5 to 227.1 kg of expensive metal, i.e. from 35.0 to 55.0% (depending on the diameter and wall thickness). In the pipe industry, a method is known for the production of seamless hot-formed mechanically machined pipes with a diameter of 530-550 mm from corrosion-resistant hard-deformed steel grades and alloys on TPU 8-16 '' with pilgrim mills, including casting ESR ingots 610 × 1725 ± 25 mm in size, machining - turning of ingots into ingots-blanks of size 590 ± 5.0 × 1725 mm, drilling in blanks of a central hole with a diameter of 100 ± 5.0 mm, boring of ingots-blanks to a size of 590 ± 5.0 × int. 220 ± 5.0 × 1750 ± 25 mm, heating ingots-blanks to the temperature of the layer In particular, piercing in a cross-helical rolling mill into billet sleeves measuring 620 × ext. 365 × 1950-2000 mm on a mandrel with a diameter of 350 mm with a diameter rise of δ = 4.0-6.0%, heating the billet blanks from cold or hot-rolled to plasticity temperature, firmware - rolling in a cross-helical mill into sleeves measuring 660 × 505-515 × 2950-3100 mm on a mandrel with a diameter of 490-500 mm with a diameter rise of δ = 5.5-6.5% , rolling of sleeves on TPU 8-16 '' with pilgrim mills into conversion tubes with a diameter of 530-550 mm with a ratio D / S = 13.5-15.0 with an allowance for wall thickness for mechanical processing - boring and turning, determining the thickness values of the removed metal layers during turning and boring from the expressions Δ = D / S * K, Δ 1 = D / S * K 1 , where Δ is the thickness of the removed metal layer when turning hot-rolled pipes on the outer surface mm; Δ 1 - the thickness of the removed metal layer when boring hot rolled pipes on the inner surface, mm; D is the outer diameter of the hot rolled pipes, mm; S is the wall thickness of the hot rolled pipes, mm; K = 0.5-0.7 - coefficient for determining the thickness of the removed metal layer when turning pipes, large values of which apply to pipes with thicker walls; K 1 = 0.4-0.5 is a coefficient for determining the thickness of the metal layer to be removed when boring pipes, large values of which relate to pipes with thicker walls (Patent No. 2387501, publ. July 27, 2010, bull. No. 12).

The disadvantage of this method is that it solves the general issues of the production of seamless hot-deformed pipes from corrosion-resistant hard-deformed steel grades and alloys with a ratio of D / S = 13.5-15.0 for subsequent machining - boring and turning them into commodity pipes with a diameter of 530-550 mm with a wall thickness of more than 20 mm, a length of not more than 4700 mm and does not solve the technological issues of the production of commodity mechanically processed pipes of 530 × 19-24 mm in size from steel grade 08X18H10-Sh of increased accuracy in diameter and wall for nuclear power facilities.

In the pipe industry, there is also a known method for producing high-quality pipes from a corrosion-resistant 08Kh18N10T-Sh brand for nuclear power facilities, which includes casting ingots by electroslag remelting, turning ingots into ingot billets, drilling in central billet ingots with a diameter of 100 ± 5 mm, heating ingot blanks up to ductility temperature, piercing ingot blanks in a cross-helical rolling mill into sleeves, rolling sleeves at TPU with pilgrim mills into hot rolled pipes, length t technological waste - pilgrim heads and seed ends with a hot cutting saw, straightening pipes, heat treatment - austenization, machining of hot rolled pipes - boring and turning, on machines with a follow-up system, into conversion blanks with metal removal, the value of which is determined from the expressions :

Figure 00000001
,
Figure 00000002
where
Figure 00000003
- the value of the removed metal layer when boring under the technological roll, mm; ΔS V.S. - the size of the removed metal layer when boring to the finished size, mm; K = (0.5-0.6) - coefficient of reduction in the size of the removed metal layer during boring, large values of which relate to pipes of large diameters;
Figure 00000004
- the value of the removed metal layer during turning to the finished size, mm; K l = (0.4-0.5) - coefficient of reduction in the size of the metal layer to be removed during turning, large values of which relate to pipes of large diameters, removal of undetected defects on conversion tubes-billets by abrasive cleaning or grinding, rolling of conversion tubes-billets on CPT mills into commodity pipes with a roughness of the outer and inner planes of not more than R a 2.5 μm (RF patent No. 2401169, class B21B 21/00, 10/10/2010, bull. No. 28).

The disadvantage of this method is that it is aimed at the production of hot-rolled conversion tubes for each size of commodity machined and cold-rolled pipes, which in turn leads to an increase in the technological tool when rolling conversion hot-rolled pipes to TPU with pilgrim mills (mandrels of cross-helical rolling mills , rolls and mandrels of pilgrim mills). Rolling of hot-rolled chimneys for each size of commodity machined and cold-rolled pipes leads to additional transshipment at TPU with pilgrim mills and a decrease in its productivity.

The closest technical solution (prototype) is a method for the production of seamless hot-deformed long pipes with a diameter of 500 mm or more on pipe rolling plants with pilgrim mills for steam boilers, steam pipelines and manifolds of plants with high and supercritical steam parameters (patent RU No. 232322315, class B21V 19 / 04, November 27, 2007), including the casting of hollow ingots by electroslag remelting with the ratio of diameter to wall thickness D / S = K 1 , H = K 2 D and H 1 = K 3 D, where D = 680 is the outer diameter of the hollow ingot of electroslag remelting mm; S is the wall thickness of the hollow ingot of electroslag remelting, mm; K 1 = (4.8–9.2) is a coefficient whose large values are taken for hollow ingots with a smaller wall thickness; N = (3000-3500) - the height of the hollow ingot of electroslag remelting for rolling pipes with a ratio of D / S≤20, mm; K 2 = (4.4-5.2) - the values of the coefficients for rolling pipes with a ratio of D / S≤20; H 1 = (2000-2100) - the height of the hollow ingot of electroslag remelting for rolling pipes with a ratio of D / S≤20, mm; K 3 = (2.9-3.1) - coefficient values for rolling pipes with a ratio of D / S≥20, mm, hollow ingots of electroslag remelting for rolling boiler pipes with a ratio of D / S≥20, cast with an inner diameter of D ext . = D d ± 5.0, where D d is the mandrel diameter, mm, electroslag remelting ingots for rolling boiler pipes are machined and bored into hollow ingots with metal removal of 8 ± 2.0 mm thick to remove welding slag and casting defects , hollow ingots-blanks of electroslag remelting are heated to the temperature of plasticity and rolled on a pilgrim mill into pipes with a ratio D / S≥20 with a tolerance of ± 1.0% in diameter and wall thickness + 15.0 / -10.0%, hollow ingots electroslag remelting for rolling boiler pipes with a ratio D / S≤20 low tide with inner diameters of 300 ± 10 mm, which are turned and bored into hollow ingots-blanks with removal of metal with a thickness of 8 ± 2.0 mm to remove welding slag and casting defects, hollow ingots-blanks of electroslag remelting are heated to the plasticity temperature, They are rolled in a cross-helical rolling mill into sleeves on a mandrel with a diameter larger than the mandrel diameter by 15-20 mm and rolled on a pilgrim mill in pipes with a ratio D / S≤20 with a tolerance of ± 1.0% in diameter and a wall thickness of +15.0 / -10.0%.

One of the main disadvantages of the bottom method is that it is aimed at the production of boiler pipes with a diameter of up to 550 mm and does not solve the technological issues of the production of mechanically processed pipes of 530 × 19-24 mm in size from steel grade 08X18H10-Sh for nuclear power facilities.

The objective of the proposed method is the development of the production of seamless machined pipes with a size of 530 × 19-24 mm for nuclear facilities from steel grade 08Kh18N10-Sh from hot rolled prefabricated tubes of 550 × 40 × 5800-6200 mm in size, rolled at 8-16 'TPU '' with pilgrim mills from hollow ingot-blanks EShB size 650 × ext. 300 × 1900 ± 50 mm, reduction of the expenditure coefficient of metal when redistributing the hollow ingot-blank EShP - commodity pipe made of corrosion-resistant steel grade 08X18H10-Ш according to TU 14-3P -197-2001 for nuclear facilities, use mations for the production of metal recycling pipe of the same diameter of the hollow ingot, billet and productivity TPU 8-16 'in rolling hot metal recycling pipes.

The technical result is achieved by this method for the production of seamless machined pipes with a size of 530 × 19-24 mm for nuclear facilities from steel grade 08X18H10-Sh, including the casting of hollow ingots by electroslag remelting of 670 × vn. 280 × 1900 ± 50 mm in size, boring and turning them into hollow ingots-blanks of size 650 × ext. 300 × 1900 ± 50 mm, heating ingots-blanks in a methodical furnace to a temperature of 1250-1260 ° С, delivery of ingot-blanks from a furnace, lubrication of the ends of ingots-blanks with a mixture of graphite and cooked salt in a ratio of 50/50 mass = 1000 -1250 g, firmware - rolling of ingot billets in a cross-helical rolling mill on a mandrel with a diameter of 490 mm with a drawing coefficient μ 3 = 1.57 and a diameter rise of δ = 4.62% into sleeves measuring 680 × in.505 × 2900 -3060 mm, rolling the sleeves at TPU 8-16 'with pilger on cone Dornach 473/479 mm in diameter 562 mm caliber, embedded in rolls with a diameter of barrel 1150 mm, with an angle transverse to release polishing portion p.vyp α = 26 °, into conversion pipes of 550 × 40 × 5800-6200 mm in size with a drawing coefficient μ 3 = 2.54, compression in diameter of 19.12%, with the supply of sleeves to the deformation zone m = 20-24 mm , a piece of technological waste - seed ends and pilgrim heads with a hot cutting saw, straightening in a six-roll straightening machine using rolling heating temperature for 2-3 passes to a curvature of not more than 6.0 mm for the total pipe length, heat treatment of pipes - austenization, machining - boring and turning of hot rolled hot-rolled pipes with a pipe size of 550 × 40 × 5800-6200 mm into commodity pipes with a size of 530 × 19-24 × 5800-6200 mm, and mechanical processing of conversion pipes with a size of 550 × 40 × 5800-6200 mm is first carried out into freight pipes of size 530 × 24, and for I eat product in pipe size 530 × 23 530 × 22 530 × 21 530 × 20 and 530 × 19 mm.

A comparative analysis of the proposed solution with the prototype shows that the claimed method differs from the known one in that they produce casting of hollow ingots by electroslag remelting of size 670 × ext. 280 × 50 ± 50 mm, boring and turning them into hollow ingots-blanks of size 650 × ext. 300 × 1900 ± 50 mm, heating ingot billets in a methodical furnace to a temperature of 1250-1260 ° C, dispensing ingot billets from the furnace, lubrication from two ends of ingot billets with a mixture of graphite and sodium chloride in a ratio of 50/50 weight = 1000-1250 g , firmware - rolling of ingot blanks in the mill Normally the helical rolling on a mandrel diameter of 490 mm with a coefficient of hoods 3 μ = 1.57 and the rise of the diameter δ = 4,62% in the size of the liner 680 × × vn.505 2900-3060 mm, rolling the sleeves at TPU 8-16 ''' with pilgrim mills on conical mandrels with a diameter of 473/479 mm in caliber 562 mm, cut into rolls with a barrel diameter of 1150 mm, with an angle of transverse release at the polishing section α a.s. v = 26 °, into pig tubes of 550 × 40 × 5800 size -6200 mm with a coefficient of hoods 3 μ = 2.54, swaging diameter 19.12%, with a supply of sleeves deformation zone m = 20-24 mm segment of technological wastes - the bare ends and or grill heads with a hot cutting saw, straightening in a six-roll straightening machine using rolling heating temperature for 2-3 passes to a curvature of not more than 6.0 mm for the total pipe length, heat treatment of pipes - austenization, machining - boring and turning of hot rolled tubes in pipe size 550 × 40 × 5800-6200 mm into commodity pipes with a size of 530 × 19-24 × 5800-6200 mm, and the machining of conversion pipes with a size of 550 × 40 × 5800-6200 mm is carried out first into commodity pipes of 530 × 24 and then into commodity pipes pipes 530 × 23, 530 × 22, 530 × 21, 530 × 20 and 530 × 19 mm.

A method for the production of seamless hot-rolled machined pipes of 530 × 22 mm in size for nuclear power facilities made of 08Kh18N10-Sh steel according to the proposed technology (method) was carried out at Chelyabinsk Tube-Rolling Plant OJSC at a tube-rolling installation with 8-16 pilgrim mills during rolling process pipes with a size of 550 × 40 × 6000 mm from hollow ingot blanks EShP with a size of 650 × 300 × 1900 mm, followed by boring and turning them into commodity machined pipes with a size of 530 × 22 × 6000 mm. Since pipes of this size and assortment have not yet been produced in Russia, comparative rolling is not shown. Data on the technological parameters of the production of seamless hot-rolled machined pipes of 530 × 22 mm in size from steel grade 08Kh18N10-Sh for nuclear power plants are shown in Table 1.

Figure 00000005

The table shows that 2 ingot blanks with a size of 650 × ext. 300 × 1900 mm with a total weight of 7,611 kg were set into production. The ingot billets were heated in a methodical furnace to a temperature of 1250-1260 ° C, stitched - rolled out in a cross-helical mill on mandrels with a diameter of 490 mm with a hood μ = 1.57 and a diameter rise of δ = 4.62% in sleeves of size 680 × ext. 505 × 2980 mm. The sleeves are rolled at 8-16 '' TPU with pilgrim mills in caliber 562 mm with an angle of transverse release at the polishing section of α P.p. = 26 °, cut into rolls with a barrel diameter of 1150 mm, into conversion tubes 550 × 40 × 6000 mm in size on conical mandrels with a diameter of 473/479 mm with a hood μ = 2.54, compression in diameter of 19.12%, with feeds of sleeves into the deformation zone m = 22-24 mm. Technological waste was cut off - seed ends and pilgrim heads were made using a hot cutting saw, and straightening in a six-roll straightening machine using the rolling heating temperature for 2-3 passes to the curvature of not more than 6.0 mm for the total length of the pipes. Heat treatment of pipes - austenization, machining - boring and turning of hot rolled hot-rolled pipes of 550 × 40 × 6000 mm in size was carried out into commodity pipes of 530 × 22 × 6000 mm in size. The pipes were accepted for compliance with the requirements of TU 14-3P-197-2001. In accordance with TU 14-3P-197-2001, 12.0 m of pipes with a size of 530 × 22 mm with a total weight of 3305 kg are accepted. The expenditure coefficients of the metal in the pipes of these lots were 2.303 and 2.058.

Thus, the use of the proposed method made it possible for the first time in world practice to carry out the production of hot-rolled chimneys of size 550 × 40 mm on TPU 8-16 '' from hollow ingot blanks EShP steel of 08Kh18N10-Sh grade steel with a size of 650 × ext. 300 × 1900 ± 50 mm for subsequent machining - boring and turning them into commodity pipes measuring 530 × 19-24 mm for nuclear facilities.

Claims (2)

1. Method for the production of seamless hot-rolled machined pipes of 530x19-24 mm in size from 08Kh18N10-Sh steel, including the casting of hollow ingots by electroslag remelting of 670hvn.280h1900 ± 50 mm in size, boring and turning them into 650hvn.300x1900 ± 50 hollow ingots-blanks mm, heating ingots-billets in a methodical furnace to a temperature of 1250-1260 ° C, delivery of ingots-billets from a furnace, lubrication from two ends of ingots-billets with a mixture of graphite and sodium chloride in a ratio of 50/50 weight = 1000-1250 g, firmware- rolling of ingot billets in the transverse mill roll rolling on a mandrel with a diameter of 490 mm with a drawing coefficient μ 3 = 1.57 and a rise in diameter of δ = 4.62% into sleeves measuring 680x in. 505x2900-3060 mm, rolling the sleeves on TPU 8-16 '' with pilgrim mills on cone Dornach 473/479 mm in diameter 562 mm caliber, embedded in rolls with a diameter of barrel 1150 mm, with an angle transverse to release polishing portion p.vyp α. = 26 °, into conversion pipes of 550x40x5800-6200 mm in size with a drawing coefficient μ 3 = 2.54, compression in diameter of 19.12%, with the supply of sleeves to the deformation zone m = 20-24 mm, the piece of technological waste - seed ends and pilgrim heads with a hot cutting saw, straightening in a six-roll straightening machine using rolling heating temperature for 2-3 passes to a curvature of not more than 6.0 mm for the total pipe length, austenization, machining - boring and turning of hot rolled pipe sizes 550x40x5800-6200 mm into product pipes 530x19-24x5800-6200 mm in size .
2. The method according to p. 1, characterized in that the machining of the conversion pipes of size 550x40x5800-6200 mm is carried out first in commodity pipes of 530x24 and then in commodity pipes of 530x23, 530x22, 530x21, 530x20 and 530x19 mm.
RU2016110305A 2016-03-22 2016-03-22 METHOD OF PRODUCING SEAMLESS MACHINED PIPES WITH 530 ×19-24 mm SIZE FROM STEEL OF "08Х18Н10-Ш" GRADE RU2620205C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2016110305A RU2620205C1 (en) 2016-03-22 2016-03-22 METHOD OF PRODUCING SEAMLESS MACHINED PIPES WITH 530 ×19-24 mm SIZE FROM STEEL OF "08Х18Н10-Ш" GRADE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2016110305A RU2620205C1 (en) 2016-03-22 2016-03-22 METHOD OF PRODUCING SEAMLESS MACHINED PIPES WITH 530 ×19-24 mm SIZE FROM STEEL OF "08Х18Н10-Ш" GRADE

Publications (1)

Publication Number Publication Date
RU2620205C1 true RU2620205C1 (en) 2017-05-23

Family

ID=58882547

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2016110305A RU2620205C1 (en) 2016-03-22 2016-03-22 METHOD OF PRODUCING SEAMLESS MACHINED PIPES WITH 530 ×19-24 mm SIZE FROM STEEL OF "08Х18Н10-Ш" GRADE

Country Status (1)

Country Link
RU (1) RU2620205C1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4798071A (en) * 1986-06-25 1989-01-17 Kocks Technik Gmbh & Co. Seamless tube production
RU2247612C2 (en) * 2003-05-06 2005-03-10 ОАО "Челябинский трубопрокатный завод" Method for making hot deformed and conversion mean- and large-diameter tubes of corrosion resistant hard-to-form steels and alloys in tube rolling aggregate with pilger mills
RU2322315C2 (en) * 2006-05-22 2008-04-20 ОАО "Челябинский трубопрокатный завод" Method for producing in tube rolling plants with pilger mills seamless hot-deformed elongated tubes for steam boilers, steam conduits and manifolds of plants with high and super-critical parameters of steam
RU2387501C2 (en) * 2007-12-24 2010-04-27 ОАО "Челябинский трубопрокатный завод" FABRICATION METHOD OF SEAMLESS HOT-DEFORMED MECHANICALLY TREATED TUBES WITH DIAMETRE OF 530-550 mm FROM CORROSION-RESISTANT DIFFICULT-TO-FORM GRADES OF STEEL AND ALLOYS ON TUBE-FORMING INSTALLATION 8-16" WITH PILGER MILLS
RU2401169C2 (en) * 2008-04-18 2010-10-10 ОАО "Челябинский трубопрокатный завод" Method of producing high-quality pipes from antirust steel 08x18h10t-"+" for nuclear power engineering structures

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4798071A (en) * 1986-06-25 1989-01-17 Kocks Technik Gmbh & Co. Seamless tube production
RU2247612C2 (en) * 2003-05-06 2005-03-10 ОАО "Челябинский трубопрокатный завод" Method for making hot deformed and conversion mean- and large-diameter tubes of corrosion resistant hard-to-form steels and alloys in tube rolling aggregate with pilger mills
RU2322315C2 (en) * 2006-05-22 2008-04-20 ОАО "Челябинский трубопрокатный завод" Method for producing in tube rolling plants with pilger mills seamless hot-deformed elongated tubes for steam boilers, steam conduits and manifolds of plants with high and super-critical parameters of steam
RU2387501C2 (en) * 2007-12-24 2010-04-27 ОАО "Челябинский трубопрокатный завод" FABRICATION METHOD OF SEAMLESS HOT-DEFORMED MECHANICALLY TREATED TUBES WITH DIAMETRE OF 530-550 mm FROM CORROSION-RESISTANT DIFFICULT-TO-FORM GRADES OF STEEL AND ALLOYS ON TUBE-FORMING INSTALLATION 8-16" WITH PILGER MILLS
RU2401169C2 (en) * 2008-04-18 2010-10-10 ОАО "Челябинский трубопрокатный завод" Method of producing high-quality pipes from antirust steel 08x18h10t-"+" for nuclear power engineering structures

Similar Documents

Publication Publication Date Title
JP4019772B2 (en) Seamless pipe manufacturing method
JP4633122B2 (en) Method for producing seamless hot-finished steel pipe and apparatus for carrying out this method
JP4438960B2 (en) Seamless pipe manufacturing method
RU2322314C2 (en) Method for producing in tube rolling plants with pilger mills seamless hot-deformed large- and mean-diameter tubes for steam boilers, steam conduits and manifolds of plants with high and super-critical parameters of steam from electroslag refining ingots or continuously cast billets
CN102699102B (en) Production process method of small-caliber cold-drawing seamless steel tube used for boiler
CN100464882C (en) Method of manufacturing seamless tube
RU2334571C2 (en) Method of conversion pipe manufacturing in pipe rolling plants with pilger mills of low-elasticity steel with boron content of 1,3-1,8%
CN102303065B (en) Method for manufacturing seamless steel tube for vehicle-mounted large-diameter high pressure gas cylinder
RU2317865C2 (en) Method for producing ingot-blanks by electroslag refining of low-ductile steel containing boron and for rolling tubes of such blanks in tube rolling plants with pilger mills for further conversion of tubes to hexahedral tube-blanks for compacted storage of waste nuclear fuel
EP1001859B1 (en) Method for producing steel rolling bearing rings
CN106623484B (en) The preparation method of bearing steel seamless steel tube
CN102294379B (en) Method for manufacturing seamless steel pipe for high-pressure gas cylinder with large caliber
CN103990938B (en) With continuous casting billet Plastic Forming large scale bearing, the process of pinion steel
CN101327492A (en) Process and system for manufacturing hot-rolled seamless tube
CN102039313B (en) Method for producing large-diameter seamless steel pipe for gas cylinder
CN101934302A (en) Method for preparing seamless titanium alloy tube for aircraft engine
RU2242302C2 (en) Method for producing hot rolled tubes of large and mean diameters of hard-to-form steels and alloys in tube rolling plants with pilger mills
CN102873512B (en) The manufacture method of thick-walled seamless steel pipes in used in nuclear power station heavy caliber
RU2007148360A (en) METHOD FOR PRODUCING SEAMLESS HOT DEFORMED MECHANICALLY TREATED PIPES WITH A DIAMETER OF 530-550 mm FROM CORROSION-RESISTANT HARD-DEFORMABLE BRANDS OF STEEL AND ALLOYS ON TPU 8-16 "WITH PILGRIMS
CN102371288A (en) Preparation method of high-precision and high-strength titanium alloy seamless tube
RU2278750C2 (en) Method for producing hot rolled conversion large- and mean-diameter tubes of hard-to-form steels and alloys in tube rolling plants with pilger mills
DE102012007379B4 (en) Process for the cross rolling of cylindrical products
RU2247612C2 (en) Method for making hot deformed and conversion mean- and large-diameter tubes of corrosion resistant hard-to-form steels and alloys in tube rolling aggregate with pilger mills
CN104259199A (en) Rolling technology for stainless steel wire rod
RU2180874C2 (en) Method for making large-diameter boiler tubes of ingots of electroslag refining