RU2613822C1 - METHOD FOR PRODUCING SEAMLESS PIPES OF 325×8-14 mm SIZE MADE OF STEEL OF "08Х18Н10Т-Ш" GRADE - Google Patents

METHOD FOR PRODUCING SEAMLESS PIPES OF 325×8-14 mm SIZE MADE OF STEEL OF "08Х18Н10Т-Ш" GRADE Download PDF

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RU2613822C1
RU2613822C1 RU2016110192A RU2016110192A RU2613822C1 RU 2613822 C1 RU2613822 C1 RU 2613822C1 RU 2016110192 A RU2016110192 A RU 2016110192A RU 2016110192 A RU2016110192 A RU 2016110192A RU 2613822 C1 RU2613822 C1 RU 2613822C1
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pipes
size
diameter
rolling
ingots
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RU2016110192A
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Анатолий Васильевич Сафьянов
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Комаров Андрей Ильич
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B21/00Pilgrim-step tube-rolling, i.e. pilger mills

Abstract

FIELD: metallurgy.
SUBSTANCE: method involves hollow ESR ingots casting, their turning, reeling, hot and cold rolling at PRM 8-16" with Pilger mills and at CRM 450 mill, and heat treatment. Sequential processing of workpieces with dimensions and processing modes regulated at every stage of production is implemented.
EFFECT: obtaining of seamless cold-rolled pipes of high quality and increased length, reduced consumable metal coefficient at redistribution of hollow ingot to ESR billet.
2 cl, 1 tbl

Description

The invention relates to pipe rolling production, and in particular to a method for the production of seamless cold-rolled pipes with a size of 325 × 8-14 mm for nuclear power facilities made of steel grade 08X18H10T-Sh and can be used on TPU 8-16ʺ with pilgrim mills.

In pipe production, there is a known method for the production of commodity and conversion pipes from hardly deformable steel grades, including drilling a central hole with a diameter of 100 ± 5 mm in blanks and ingots-blanks ESR with a diameter of 380-500 mm, holding them on the grates of method furnaces at a temperature of 500-550 ° C for 70-90 minutes depending on the diameter, after which heating to a temperature of 1120-1140 at a speed of 1.4-1.5 deg./min, piercing the blanks and ingots-blanks ESR in the cross-helical rolling mill into sleeves size in diameter size at speed and rotation of the work rolls 25-40 rev / min on the mandrel diameter allowing for pilger reduction is at least 25 mm (RF patent №2175899, Bul. №32, 20.11.2001).

The disadvantage of this method is that it is acceptable only for the production of hot-rolled commodity and conversion pipes of medium diameter, namely pipes with a diameter of 219-325 mm, because for rolling pipes with a diameter of more than 325 mm, a blank or ingot-blank of ESR with a diameter of 540-620 mm is necessary, which, due to the low power of the drive of the cross-helical rolling mill, cannot be sewn, and most importantly, this method does not stipulate machining allowance - boring and turning of conversion pipes for the manufacture of commodity pipes of 245 × 19, 325 × 36 and 426 × 40 mm in size from corrosion-resistant steel 08X18H10T-Sh for nuclear power facilities.

In pipe production, there is also 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 the ductility temperature, 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 15-25 rpm, and the second and subsequent, if necessary, rolling-ups with a rise or landing in diameter of not more than 5.0% and a hood μ = 1.4-1.75 at a roll rotation speed of 20-50 rpm, using cold or hot insert of shell blanks into the furnace, the process of flashing from capturing ingots-blanks of ESR or blanks until they are 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 exit the sleeve blanks of their rolls, the number of revolutions is increased to 35-40 rpm, the firmware process is p Askates (second firmware) from capturing the billet sleeve to being completely on the mandrel lead 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, bull. No. 7, 03/10/2005).

The disadvantage of this method is that it is aimed at the production of commodity machined pipes and also does not stipulate the allowance for machining of conversion pipes for the manufacture of commodity machined pipes of high quality with a size of 245 × 19, 351 × 36 and 426 × 40 mm from corrosion-resistant steel 08Х18Н10Т-Ш for nuclear facilities.

In pipe production, there is also known a 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 the ingots into ingot ingots, drilling in ingots-blanks of a central hole 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, a section of those of biological waste - pilgrim heads and seed ends with a hot cutting saw, straightening pipes, heat treatment - austenization, machining of hot rolled tubes - 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 : ΔS v.p. VS = KΔS , ΔS n.p. = K 1 ΔS n.s. where ΔS v.p. - 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; ΔS n.p. - the value of the removed metal layer during turning under the technological roll, mm; ΔS n.c. - the value of the removed metal layer during turning to the finished size, mm; K 1 = (0.4-0.5) is the 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-blanks by abrasive grinding or grinding, rolling of conversion tubes-blanks on CPT mills into commodity pipes with a roughness of the outer and inner planes of not more than R a 2.5 μm (Patent No. 2387501, July 27, 2010, bull. No. 12).

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) - the values of the coefficients 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 cast 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 pipes of size 325 × 8-14 mm from 08Kh18N10T-Sh steel for nuclear power facilities.

The objective of the proposed method is the development of the production of seamless cold-rolled pipes of high quality with a size of 325 × 8-14 mm of increased length from conversion billets of size 474 × 20-26 × 3700-3950 mm, obtained by machining, boring and turning of hot-rolled pipes of size 490 × 40 × 7400-7900 mm, rolled on TPU 8-16ʺ with pilgrim mills from hollow ESR ingots-blanks of size 650 × ext. 320 × 2100 × ± 50 mm, reduction of the expenditure coefficient of metal during redistribution of the hollow ingot-blanks ESR - commodity pipe made of corrosion -resistant steel 08X18 10T-III for nuclear power plants and increasing productivity TPU 8-16" during rolling of mother tubes.

The technical result is achieved through the use of a method for the production of seamless pipes with a size of 325 × 8-14 mm for nuclear power facilities from steel grade 08X18H10T-Sh, including the casting of hollow ingots by electroslag remelting with a size of 670 × ext. 300 × 2100 ± 50, turning them into ingots workpieces of size 650 × ext. 320 × 2100 ± 50 mm, heating ingots-workpieces in a methodical furnace to a temperature of 1250-1260 ° C, dispensing ingots-workpieces from the furnace to an ingot trolley, lubrication of ingots-workpieces inside from both ends with a mixture of graphite and cooked salt 50/50 mass ≈ 1000-1250 g each, stitching cu-rolling of sleeve blanks in a cross-helical rolling mill on a mandrel with a diameter of 440 mm with a hood μ = 1.37 and a rise in diameter of δ = 1.54% into sleeves measuring 660 × ext. 455 × 2800-2950 mm, rolling the sleeves on TPU 8-16ʺ with pilgrim mills on cone mandrels with a diameter of 412/418 mm in a caliber 498 mm, cut into rolls with a barrel diameter of 1150 mm, with feeds of sleeves into the deformation zone m = 25-27 mm, into conversion pipes 490 × 40 in size × 7400-7900 mm with an extraction coefficient μ = 3.18 and compression in diameter of 25.76%, a piece of technological waste - seed ends and pilgrim heads with a hot saw cutting, straightening on a six-roll straightening machine for 2-3 passes to a curvature of not more than 5.0 mm for the total length of the conversion pipes, heat treatment - austenization, pipe cutting into two equal lengths, machining - boring and turning into billet pipes 474 × 26 × 3700-3950, 474 × 24 × 3700-3950, 474 × 22 × 3700-3950 and 474 × 20 × 3700-3950 mm in size, rolling machined conversion pipes at the KhPT 450 mill into commodity pipes along the routes: 474 × 20 × 3700-3950-426 × 16 × 4750-5100-377 × 12 × 6800-7300--325 × 8 × 11400-12300 and 325 × 9 × 10100-10900 mm with drawing coefficients μ respectively 1.38, 1.50, 1.73 and 1.54; 474 × 22 × 3700-3950--426 × 18 × 4650-5000-377 × 14 × 6400-6900--325 × 10 × 9950-10750 and 325 × 11 × 9050-9800 mm with drawing coefficients μ respectively 1.35 1.45, 1.61 and 1.47; 474 × 24 × 3700-3950--426 × 20 × 4600-4900--377 × 16 × 6100-6550--325 × 12 × 9000-9700 and 325 × 13 × 8300-8950 mm with drawing coefficients μ respectively 1, 33, 1.41, 1.54 and 1.42; 474 × 26 × 3700-3950--426 × 22 × 4500-4800--377 × 18 × 5900-6300--325 × 14 × 8400-9000 mm with drawing coefficients μ respectively 1.31, 1.37 and 1, 48 and the heat treatment of cold-rolled pipes and their acceptance, and the machining of hot rolled hot-rolled pipes of 490 × 40 × 3500-3600 mm in size is first carried out at a size of 474 × 26 mm, and then at a size of 474 × 24, 474 × 22 and 474 × 20 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. 300 × 2100 ± 50, turning them into ingots-blanks of size 650 × ext. 320 × 2100 ± 50 mm, heating ingots-billets in a methodical furnace to a temperature of 1250-1260 ° C, dispensing ingots-billets from the furnace to an ingot trolley, lubrication of ingots-billets inside with two ends with a mixture of graphite with sodium chloride 50/50 weight "1000-1250 g , firmware - rolling of blanks in the mill across screw rolling on a mandrel with a diameter of 440 mm with a drawing coefficient μ = 1.37 and a diameter rise of δ = 1.54% in sleeves measuring 660 × ext. 455 × 2800-2950 mm, rolling the sleeves on TPU 8-16ʺ with pilgrim mills on conical mandrels with a diameter of 412/418 mm in caliber 498 mm, cut into rolls with a barrel diameter of 1150 mm, with feeds of sleeves into the deformation zone m = 25-27 mm, into conversion pipes 490 × 40 × 7400-7900 mm in size, s by feeding sleeves into the deformation zone m = 25-27 mm with a drawing coefficient μ = 3.18 and compression in diameter of 25.76%, a piece of technological waste - seed ends and pilgrim heads sludge hot cutting, straightening on a six-roll straightening machine for 2-3 passes to a curvature of not more than 5.0 mm for the total length of the transfer pipes, heat treatment - austenization, pipe cutting into two pipes of equal length, machining - boring and turning into transfer pipes - billets of 474 × 26 × 3700-3950, 474 × 24 × 3700-3950, 474 × 22 × 3700-3950 and 474 × 20 × 3700-3950 mm, rolling mechanically processed conversion pipes at the KhPT 450 mill into freight pipes along routes : 474 × 20 × 3700-3950 --- 426 × 16 × 4750-5100--377 × 12 × 6800-7300 --- 325 × 8 × 11400-12300 and 325 × 9 × 10100-10900 mm with drawing coefficients μ respectively 1, 38, 1.50, 1.73 and 1.54; 474 × 22 × 3700-3950--426 × 18 × 4650-5000 --- 377 × 14 × 6400-6900--325 × 10 × 9950-10750 and 325 × 11 × 9050-9800 mm with drawing coefficients μ respectively 1 35, 1.45, 1.61 and 1.47; 474 × 24 × 3700-3950--426 × 20 × 4600-4900--377 × 16 × 6100-6550--325 × 12 × 9000-9700 and 325 × 13 × 8300-8950 mm with drawing coefficients μ respectively 1, 33, 1.41, 1.54 and 1.42; 474 × 26 × 3700-3950--426 × 22 × 4500-4800--377 × 18 × 5900-6300--325 × 14 × 8400-9000 mm with drawing coefficients μ respectively 1.31, 1.37 and 1, 48, the heat treatment of cold rolled pipes and their acceptance, and the machining of hot rolled pipe sizes of 490 × 40 × 3500-3600 mm, are first made to a size of 474 × 26 mm, and then to a size of 474 × 24, 474 × 22 and 474 × 20 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 made it possible to identify signs that distinguish the claimed method from the prototype, which meets the patentability criterion of "novelty."

The method was tested at Chelyabinsk Tube Rolling Plant OJSC at a tube rolling plant with pilgrim mills 8-16ʺ when rolling pig tubes of 490 × 40 × 7650 mm in size from EShP hollow ingots-billets with a size of 650 × in. 320 × 2200 mm of 08Kh18N10T-Sh steel with subsequent boring and turning them into billet pipes of 474 × 22 × 3825 mm in size and rolling them at the KhPT 450 mill into commodity pipes along the route: 474 × 22 × 3825--426 × 18 × 4800--377 × 14 × 6600-- 325 × 10 × 10300 mm with hood coefficients μ of 1.35.1.45 and 1.61, respectively - the proposed technology. According to the existing technology, EAW ingots-blanks with a size of 500 × 100 × 1750 mm were sewn in a cross-screw rolling mill into sleeves 520 × in. 315 × 2400 mm in size, which were rolled on TPU 8-16ʺ with pilgrim mills into 345 × 30 pig tubes × 8800 mm. Conversion pipes were cut into two pipes of equal length, bored and turned into commodity pipes measuring 325 × 10 × 4400 mm. Data on the technological parameters for the production of 325 × 10 mm commodity pipes from hollow ingot-blanks of ESH steel of 08Kh18N10T-Sh grade (proposed technology) and from ingot-blanks of ESH (existing technology) are shown in Table 1.

Figure 00000001

The table shows that, according to the existing technology, three ingots-blanks of ESRs of 500 × 100 × 1750 mm in size with a total weight of 8100 kg were set into production. The ingot billets were heated in a methodical furnace to a temperature of 1250-1260 ° C, stitched in a cross-helical rolling mill on a mandrel with a diameter of 300 mm with a hood μ = 1.37 and a diameter rise of δ = 4.0% in sleeves 520 × ext. 315 × 2400 mm, which were rolled on TPU 8-16ʺ with pilgrim mills into conversion pipes 345 × 30 × 8800 mm in size. Conversion pipes were straightened in a six-roll straightening machine and heat-treated. Since the existing equipment of ChTPZ OJSC can bore and grind conversion pipes with a length of not more than 6000 mm, the conversion pipes were cut into two pipes of equal length, bored and turned into commodity pipes measuring 325 × 10 × 4400 mm. Accepted in accordance with TU 14-3R-197-2001, six pipes with a size of 325 × 10 × 4400 mm with a total weight of 2051 kg. The expenditure coefficient of the metal in the pipes of this batch was 3.949. According to the proposed technology, 3 hollow EAW ingot blanks with a size of 650 × ext. 300 × 2100 mm with a total weight of 12908 kg were set into production, which were heated in a methodic furnace to a temperature of 1250-1260 ° C, stitched - rolled out in a cross-helical rolling mill in sleeves measuring 660 × ext. 455 × 2880 mm on a mandrel with a diameter of 440 mm with a hood μ = 1.37 and a diameter rise of δ = 1.54%. The sleeves were rolled at TPU 8-16ʺ with pilgrim mills into pig tubes of 490 × 40 × 76500 mm in caliber 498 mm with an angle of transverse release at the polishing section of α half-cut. = 25 °, cut into rolls with a barrel diameter of 1150 mm, with a hood μ = 3.18, compression in diameter Δ = 25.76% and with feeds of sleeves into the deformation zone m = 25-26 mm. The pipes are straightened on a six-roll straightening machine for 2-3 passes to the curvature of not more than 6.0 mm for the total length of the pipes. After heat treatment - austenization, the conversion pipes are cut into two slots of equal length, bored and turned into conversion billets of 474 × 22 × 3825 mm in size. Machined billet pipes were sent to workshop No. 5 and rolled on the KhPT 450 mill to commodity pipes along the routes: 474 × 22 × 3825 --- 426 × 18 × 4800 --- 377 × 14 × 6600 --- 325 × 10 × 10300 mm with drawing coefficients μ respectively 1.35, 1.45 and 1.61. In accordance with TU 14-3R-197-2001, six pipes of 325 × 10 × 11700 mm in size with a total weight of 4801 kg were adopted. The expenditure coefficient of the metal in the pipes of this batch was 2.689.

Thus, in the production of pipes of 325 × 10 mm in size according to the proposed technology (method), a decrease in the cost coefficient of expensive metal per ton of pipes by 1260 kg, an increase in length by 2.34 times and a decrease in the roughness of the outer and inner surfaces of the pipes are obtained.

Using the proposed method for the production of seamless pipes with a size of 325 × 8-14 mm for nuclear facilities of steel grade 08X18H10T-Sh will significantly reduce the consumption of expensive metal, reduce the roughness of the outer and inner surfaces of the pipes, increase the length of the pipes, and therefore reduce their cost.

Claims (2)

1. Method for the production of seamless pipes 325 × 8-14 mm in size for nuclear facilities from 08Kh18N10T-Sh steel, including the casting of hollow ingots by electroslag remelting of 670 × vn. 300 × 2100 ± 50 in size, turning them into 650 × ingots ext. 320 × 2100 ± 50 mm, heating the ingot billets in the method furnace to a temperature of 1250-1260 ° C, dispensing the ingot billets from the furnace to the ingot cart, supplying the ingot billets from both ends with 1000-1250 g of grease in the form a mixture of graphite with table salt in a ratio of 50/50, firmware - rolling into sleeves measuring 660 × ext. 455 × 280 0-2950 mm in a cross-helical mill on a mandrel with a diameter of 440 mm with a draw ratio μ = 1.37 and a rise in diameter of δ = 1.54%, rolling of sleeves on TPU 8-16ʺ with pilgrim mills on conical mandrels with a diameter of 412 / 418 mm in a caliber of 498 mm, cut into rolls with a barrel diameter of 1150 mm, with feeds of sleeves into the deformation zone m = 25-27 mm, into conversion tubes 490 × 40 × 7400-7900 mm in size with a drawing coefficient μ = 3.18 and compression by diameter of 25.76%, a segment of technological waste - seed ends and pilgrim heads with a hot cutting saw, straightening on the six-roll correct 2-3 passes to the curvature of the machine no more than 5.0 mm per length of the transfer pipe, austenization, cutting of each transfer pipe into two transfer pipes of equal length, 490 × 40 × 3700-3950 mm, machining - boring and turning into transfer pipes - workpieces of 474 × 26 × 3700-3950, 474 × 24 × 3700-3950, 474 × 22 × 3700-3950 and 474 × 20 × 3700-3950 mm in size, rolling machined conversion billets at the KhPT 450 mill into commodity pipes routes: 474 × 20 × 3700-3950 - 426 × 16 × 4750-5100 - 377 × 12 × 6800-7300 - 325 × 8 × 11400-12300 and 325 × 9 × 10100-10900 mm with drawing coefficients μ respectively 1, 38, 1.50, 1.73 and 1.54; 474 × 22 × 3700-3950 - 426 × 18 × 4650-5000 - 377 × 14 × 6400-6900 - 325 × 10 × 9950-10750 and 325 × 11 × 9050-9800 mm with drawing coefficients μ respectively 1.35, 1 45, 1.61 and 1.47; 474 × 24 × 3700-3950 - 426 × 20 × 4600-4900 - 377 × 16 × 6100-6550 - 325 × 12 × 9000-9700 and 325 × 13 × 8300-8950 mm with drawing coefficients μ respectively 1.33, 1 41, 1.54 and 1.42; 474 × 26 × 3700-3950-426 × 22 × 4500-4800 - 377 × 18 × 5900-6300 - 325 × 14 × 8400-9000 mm with drawing coefficients μ respectively 1.31, 1.37 and 1.48 and thermal cold rolled pipe processing.
2. The method according to p. 1, characterized in that the machining of the conversion pipes with a size of 490 × 40 × 3700-3950 mm, if necessary, is first performed on a size of 474 × 26 mm, and then on a size of 474 × 24, 474 × 22 and 474 × 20 mm.
RU2016110192A 2016-03-22 2016-03-22 METHOD FOR PRODUCING SEAMLESS PIPES OF 325×8-14 mm SIZE MADE OF STEEL OF "08Х18Н10Т-Ш" GRADE RU2613822C1 (en)

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Citations (4)

* 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
RU2257271C1 (en) * 2004-03-03 2005-07-27 ООО "Специальные Стали и Сплавы" Method for making elongated conversion large- and mean- diameter tubes of centrifugally cast hollow billets and electroslag refining ingots of steels for telescopic systems (periscopes of submarines)
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 (4)

* 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
RU2257271C1 (en) * 2004-03-03 2005-07-27 ООО "Специальные Стали и Сплавы" Method for making elongated conversion large- and mean- diameter tubes of centrifugally cast hollow billets and electroslag refining ingots of steels for telescopic systems (periscopes of submarines)
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

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