CN101980801B - High-alloy seamless steel pipe manufacturing method - Google Patents
High-alloy seamless steel pipe manufacturing method Download PDFInfo
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- CN101980801B CN101980801B CN2008801283458A CN200880128345A CN101980801B CN 101980801 B CN101980801 B CN 101980801B CN 2008801283458 A CN2008801283458 A CN 2008801283458A CN 200880128345 A CN200880128345 A CN 200880128345A CN 101980801 B CN101980801 B CN 101980801B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 70
- 239000010959 steel Substances 0.000 title claims abstract description 70
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 25
- 239000000956 alloy Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000005096 rolling process Methods 0.000 claims abstract description 52
- 230000003746 surface roughness Effects 0.000 claims abstract description 28
- 238000005553 drilling Methods 0.000 claims description 28
- 238000013459 approach Methods 0.000 claims description 21
- 239000000498 cooling water Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 5
- 230000007547 defect Effects 0.000 description 20
- 238000001125 extrusion Methods 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 229910052804 chromium Inorganic materials 0.000 description 6
- 239000011651 chromium Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 230000002950 deficient Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 102220342298 rs777367316 Human genes 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-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 or Stiefel rotary piercers
- B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/10—Roughness of roll surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/024—Rolls for bars, rods, rounds, tubes, wire or the like
- B21B27/025—Skew rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Extrusion Of Metal (AREA)
Abstract
Disclosed is a high-alloy seamless steel pipe manufacturing method, in which a high-alloy steel billet heated to a temperature range of 900 to 1250 DEG C is pierced and rolled by a piercer equipped with a main roll having a surface roughness (Rmax) adjusted to a range of 150 to 500 [mu]m, so that it forms no fin. It is preferred that the ratio (or an opening (WG) of a guide roll to an opening (WR) of the main roll) is adjusted to a range of 1.10 to 1.20. It is also preferred that the difference (ThetaP - ThetaR) between a half angle (ThetaR) made by the exit face of the main roll and the pass line and a half angle (ThetaP) made by the rolling face of the piercing plug and the pass line is adjusted to a range of 0 to 3.0 degrees.
Description
Technical field
The present invention relates to the manufacturing approach of high-alloy seamless steel pipe, particularly relate to the manufacturing approach of the high alloy steel seamless steel pipe that does not produce external defects.
Background technology
As the manufacturing approach of seamless steel pipe, known have Mannesmann Pierre form tube mill technology, Mannesmann to come directly towards methods such as tube mill technology, Mannesmann's plug tube mill technology.Wherein, be employed in more and utilize bore a hole warmed-up steel billet and after having obtained hollow bloom, of roll piercing mill with the rolling Mannesmann's plug tube mill technology that is inserted with the hollow bloom of plug of plug tube mill.
The patent documentation of existing many manufacturing approaches about seamless steel pipe.The technology of the external defects when preventing drilling/rolling discloses following technology.
In patent documentation 1, disclose following invention; Promptly; When heating contains the martensitic stainless steel steel billet in quality % Cr:10.0～16.0%, Ni:1.0～8.0%; The lower layer part of the oxide skin that generates at billet surface contains sheet metal, and making the space area occupation ratio whole with respect to the cross section is below 20% and thickness is to bore a hole below the 150 μ m.
In patent documentation 2, disclosing and utilizing the manufacturing of inclination roll-type perforation method is the method that unworkability more than the 4.5 quality % is cut the seamless pipe that material constitutes outward by chromium content.In the method, use is in the maximum of the step of any 10 point measurements between length of material direction 25mm of material and the maximum of minimizing difference, and the mean value of being measured (10 average steps of point) is the material below the 2.0mm.
That is, in above-mentioned patent documentation 1 and 2, record the technology that the material itself that is used for drilling/rolling through adjustment reduces external defects.
In patent documentation 3, record the technology that reduces external defects through the shape of home roll of adjustment drilling/rolling.This technology be about between a pair of pyramid type home roll of alternate configurations around the roll line and a pair of disk-shaped roll along roll line configuration top, be rolled the part spiral and move the method for carrying out drilling/rolling and obtaining seamless metal pipe while make.In the method, make above-mentioned disk-shaped roll be rolled part to the above-mentioned home roll side that rotates into side of disk-shaped roll sliding surface, with respect to the exit face angle non-parallel ground tilted configuration of roll line with inclination angle δ and above-mentioned home roll towards being positioned at.And, to satisfy " θ
2+ 2 °＜δ＜9 ° " (θ
2: the exit face angle of above-mentioned home roll) and " δ+θ
1＜12 ° " (θ
1: the mode inlet face angle of above-mentioned home roll) is set above-mentioned inclination angle δ, and the expander ratio is more than 1.15.Thus, prevent that outer surface from producing defective.
In the technology of patent documentation 4 records; The dish type guide reel of using during as drilling/rolling; Employing is Fe and the inevitable low-alloy steel that constitutes of element and have the dish type guide reel of the heat treatment oxidation cortex of 50～500 μ m on its top layer by C:0.2～0.5 weight %, Cr:0.5～4 weight %, Ni:0.5～4 weight %, remainder, thereby prevents to produce external defects.
In patent documentation 5, disclose the technology of the guide plate of using about the tilted perforations or the tilt rolling of seamless steel pipe (guide shoe).In this technology; Guide plate is divided into main part and bottom two parts along its thickness direction; The chimeric a plurality of ball shape instruments that constitute by pottery or cermet material between main part and bottom; Make the part of this ball shape instrument outstanding less than the emptying aperture of the diameter of this ball shape instrument, thereby prevent to produce external defects from the diameter on guide plate surface.
Patent documentation 1: TOHKEMY 2001-96304 communique
Patent documentation 2: TOHKEMY 2003-53403 communique
Patent documentation 3: japanese kokai publication hei 7-124612 communique
Patent documentation 4: japanese kokai publication hei 6-262219 communique
Patent documentation 5: japanese kokai publication hei 11-285709 communique
As stated; In technology in the past; Disclose shape change, the guide plate surface treatment of the home roll that utilizes the adjustment be rolled the part surface state, drilling/rolling, the methods such as material adjustment of dish type guide reel; Prevent the technology of the external defects of seamless steel pipe, yet, the home roll surface roughness all do not paid close attention to.
But, under the situation of drilling/rolling high-alloy steel, be easy to generate extrude (pipe-swelling) that is rolled part, utilize above-mentioned countermeasure insufficient sometimes.
Summary of the invention
The present invention is the invention of making in order to solve above-mentioned problem, and its purpose is to provide a kind of manufacturing approach that does not produce the high-alloy seamless steel pipe of external defects.
Fig. 1 is the figure that situation is extruded in the generation of explanation high-alloy seamless steel pipe.As shown in Figure 1, be rolled part 4 and be rolled with guide reel 3 restriction external diameters by home roll 2 on one side by top 1 perforation on one side.When drilling/rolling, the position shown in the B in Fig. 1 produces when extruding, and develops into external defects.
The inventor has at first found out under the situation by the situation of extruding of the external defects of extrusion ratio (being rolled the aperture of external diameter/home roll of the portion that extrudes of part) expression developing into easily high-alloy seamless steel pipe to have dependency relation between extrusion ratio and the external defects.That is, can know,, can reduce the external defects of seamless steel pipe significantly if extrusion ratio is adjusted into less than 1.10 according to the inventor's research.In addition, what is called
" be rolled the external diameter of the portion that extrudes of part " and be meant the length shown in the A of Fig. 1, so-called " aperture of home roll " is meant the W of Fig. 1
RShown length.
The inventor has investigated the influence of various drilling/rolling conditions to extrusion ratio in further detail, the opinion below having proposed, that is, and the home roll surface roughness R of roll piercing mill
MaxHave the greatest impact, in addition, the aperture W of the guide reel of roll piercing mill
GAperture W with home roll
RRatio (W
G/ W
R), the half-angle θ that become with roll line of the rolling surface that is rolled part surface temperature, perforating head in when perforation
PThe half-angle θ that is become with roll line with the exit face of the home roll of roll piercing mill
RPoor (θ
P-θ
R) also extrusion ratio is exerted an influence.
The present invention is based on above-mentioned opinion and propose, mainly proposed manufacturing approach with the high-alloy seamless steel pipe shown in following (1)～(6).
(1) a kind of manufacturing approach of high-alloy seamless steel pipe, it comprises heating process, the drilling/rolling operation of steel billet and extends rolling process, it is characterized in that, with the home roll surface roughness R in the drilling/rolling operation
MaxBe adjusted into the scope of 150～500 μ m.
(2) according to the manufacturing approach of high-alloy seamless steel pipe of above-mentioned (1) record, it is characterized in that, in the drilling/rolling operation, so that the aperture W of guide reel
GAperture W with home roll
RRatio (W
G/ W
R) be that the mode of 1.10～1.20 scope is bored a hole.
(3) according to the manufacturing approach of high-alloy seamless steel pipe of above-mentioned (1) and (2) record, it is characterized in that, heat, be rolled the part surface temperature in 900～1250 ℃ scope when making perforation.
(4) according to the manufacturing approach of the high-alloy seamless steel pipe of each record in above-mentioned (1)～(3), it is characterized in that, in the drilling/rolling operation, so that the half-angle θ that the rolling surface of perforating head is become with roll line
PThe half-angle θ that is become with roll line with the exit face of home roll
RPoor (θ
P-θ
R) mode in 0～3.0 ° scope bores a hole.
(5) according to the manufacturing approach of the high-alloy seamless steel pipe of each record in above-mentioned (1)～(4), it is characterized in that used home roll when adopting the perforation of seamless steel pipe of ordinary steel.
According to the manufacturing approach of high-alloy seamless steel pipe of above-mentioned (5) record, it is characterized in that (6) flow of roller cooling water is 1000～1500l/ minute when the perforation of the seamless steel pipe of ordinary steel.
According to the present invention, what can prevent when high-alloy seamless steel pipe is bored a hole to produce extrudes, so can prevent to produce defective at the outer surface of seamless steel pipe.
Description of drawings
Fig. 1 is the figure of the situation extruded of generation of explanation high-alloy seamless steel pipe.
Fig. 2 is the figure of the half-angle that become with roll line of explanation home roll and top.
Fig. 3 is the figure of the relation of home roll surface roughness and the extrusion ratio of expression among the embodiment.
Fig. 4 is the figure of relation of rolling radical and the home roll surface roughness of the ordinary steel of expression among the embodiment.
Fig. 5 is the (W among the expression embodiment
G/ W
R) than and the figure of the relation of extrusion ratio.
Fig. 6 is the (θ among the expression embodiment
P-θ
R) figure of difference and the relation of extrusion ratio.
Description of reference numerals
1, top; 2, home roll; 3, guide reel; 4, be rolled part.
The specific embodiment
In the present invention, for example, with roll piercing mill to boring a hole by the warmed-up steel billet of heating furnace; Obtained after the hollow bloom; Utilize rolling these hollow blooms of extension such as plug tube mill, further utilize enforcement fixed diameter rollings such as sizing mill as required, make the seamless pipe of high-alloy steel.
At this, in the manufacturing approach of high-alloy seamless steel pipe of the present invention, the home roll of the roll piercing mill of using as drilling/rolling needs with its surface roughness R
MaxBe adjusted into the home roll of the scope of 150～500 μ m.Surface roughness R at this home roll
MaxUnder the too smooth situation, the chucking power of the roller during perforation is insufficient less than 150 μ m, is rolled extruding significantly of part.On the other hand, at the surface roughness R of this home roll
MaxSurpass under the situation of 500 μ m, because of roller produces defective being rolled on the part.Therefore, in drilling/rolling operation of the present invention, with the surface roughness R of home roll
MaxBe adjusted into the scope of 150～500 μ m.
As the home roll of the scope that satisfies above-mentioned surface roughness, preferably use the employed home roll of perforation of the seamless steel pipe of ordinary steel.The rolling number of times of ordinary steel is restriction not, but has preferably adopted the roller of 3000～4000 left and right sides ordinary steels rolling.The flow of the roller cooling water when particularly preferably reducing the perforation of seamless steel pipe of ordinary steel.Thus, can make the home roll surface roughness be formed on above-mentioned scope expeditiously.Usually, the flow of roller cooling water is about 2000～2500l/ minute during the perforation of the seamless steel pipe of ordinary steel, and preferred flow is 1000～1500l/ minute.Thus, can reduce required rolling radical in order roll surface roughness to be adjusted into above-mentioned scope.
Preferably with the aperture W of guide reel
GAperture W with the home roll of roll piercing mill
RRatio (W
G/ W
R) mode in 1.10～1.20 scope bores a hole.This is because at this (W
G/ W
R) than less than under 1.10 the situation, might produce and nip badly, under 1.20 the situation of surpassing, might produce and extrude and cause producing external defects.
As when perforation be rolled the part surface temperature, be preferably in 900～1250 ℃ the scope.This be because piercing temperature less than 900 ℃ situation under, the deformation drag that is rolled part that is used for drilling/rolling is risen, and might produce and extrude, and surpasses under 1250 ℃ the situation at piercing temperature, might make to be rolled the part fusing and to cause producing internal flaw.
Preferred so that the half-angle θ that the rolling surface of perforating head is become with roll line
PThe half-angle θ that is become with roll line with the exit face of the home roll of roll piercing mill
RPoor (θ
P-θ
R) mode in 0～3.0 ° scope bores a hole.This is because this poor (θ
P-θ
R) can't bore a hole during less than 0 °, might produce when surpassing 3.0 ° and extrude and cause producing external defects.In addition, the half-angle θ that become with roll line of the exit face of the home roll of roll piercing mill
RThe half-angle θ that is become with roll line with the rolling surface of perforating head
PBe respectively half-angle θ shown in Figure 2
RWith half-angle θ
P
Embodiment 1
Carried out following experiment in order to confirm effect of the present invention.That is will be that 225mm, length are after the steel billet of 3000mm is heated to 1200 ℃, to use surface roughness R, through the external diameter that obtains of casting 13%Cr steel (SUS403)
MaxDifferent various home rolls (roller diameter is 1200mm) are bored a hole, and having made external diameter is that 228mm, wall thickness are the perforation hollow billet (pierced shells) of 18.75mm.The home roll surface roughness is adjusted by the rolling radical of the ordinary steel of implementing (S25C) in advance.Fig. 3 representes this result.
As shown in Figure 3, at home roll surface roughness R
MaxWhen being the 50 μ m left and right sides, extrusion ratio (being rolled the aperture of external diameter/home roll of the portion that extrudes of part) surpasses 1.15, develops into external defects easily.But, at home roll surface roughness R
MaxDuring increase, extrusion ratio diminishes, at home roll surface roughness R
MaxBe that extrusion ratio is below 1.10 under the above situation of 150 μ m.
The inventor uses surface roughness R
MaxAfter the home roll that is adjusted into 175 μ m has carried out actual drilling/rolling operation operation, can the external defects generation rate 6.2% be reduced to 3.0% before adjust.
Then, studied the rolling method of adjusting the surface roughness of home roll of passing through ordinary steel.This result is shown in Fig. 4.
As shown in Figure 4, when increasing the rolling radical of ordinary steel, home roll surface roughness R
MaxRise.And, when rolling 3000 above ordinary steels, home roll surface roughness R
MaxCan be for more than the 150 μ m.In addition, if the cooling water that uses when reducing rolling ordinary steel then makes the efficient of home roll surface roughness adjustment further rise.In addition, flow is about 2500l/ minute in the example (among Fig. 4) of common cooling water, and flow is 1500l/ minute in the example (zero among Fig. 4) that reduces cooling water.
Then, the inventor has investigated the aperture W of the guide reel in the drilling/rolling operation
GAperture W with home roll
RRatio (W
G/ W
R) with the relation of extrusion ratio.In this experiment, use through rolling ordinary steel surface roughness R
MaxBe adjusted into the home roll of 175 μ m, to (W
G/ W
R) than carrying out various changes, carried out the experiment of the above-mentioned 13%Cr steel of drilling/rolling.Other condition is identical with the above embodiments 1.Its result is shown in Fig. 5.As shown in Figure 5, at (W
G/ W
R) than surpassing under 1.20 the situation, extrusion ratio increases and forms the situation that is easy to generate external defects.At (W
G/ W
R) when diminishing, the amount of nipping increases and forms the bad situation of nipping that is easy to generate, but should (W
G/ W
R) than being 1.10 when above, can implement the drilling/rolling experiment no problemly.
The inventor uses surface roughness R
MaxBe adjusted into the home roll of 175 μ m, and with (W
G/ W
R) than being adjusted into 1.15, after having carried out actual drilling/rolling operation operation, can the external defects generation rate be reduced to 2.0%.
Embodiment 4
Then, the inventor has investigated the half-angle θ that the rolling surface of the perforating head in the drilling/rolling operation is become with roll line
PThe half-angle θ that is become with roll line with the exit face of home roll
RPoor (θ
P-θ
R) and the relation of extrusion ratio.In this experiment, use through rolling ordinary steel surface roughness R
MaxBe adjusted into the home roll of 175 μ m, with (W
G/ W
R) than being adjusted into 1.15, to poor (θ
P-θ
R) carry out various adjustment, carried out the experiment of the above-mentioned 13%Cr steel of drilling/rolling.Other condition is identical with the above embodiments 1.Its result is shown in Fig. 6.
As shown in Figure 6, at (θ
P-θ
R) when difference rose, extrusion ratio also rose, as (θ
P-θ
R) when difference surpassed 3.0 °, extrusion ratio formed the bad situation of extruding that is easy to generate above 1.10.
The inventor uses surface roughness R
MaxBe adjusted into the home roll of 175 μ m, and with (W
G/ W
R) than being adjusted into 1.15, with (θ
P-θ
R) difference be adjusted into 2.0 °, after having carried out actual drilling/rolling operation operation, can the external defects generation rate be reduced to 1.5%.
Utilizability on the industry
According to the present invention, what can prevent when the perforation of high-alloy seamless steel pipe, to produce extrudes, so can prevent to produce the external defects of seamless steel pipe.
Claims (7)
1. the manufacturing approach of a high-alloy seamless steel pipe, it comprises heating process, the drilling/rolling operation of steel billet and extends rolling process, it is characterized in that,
With the home roll surface roughness R in the drilling/rolling operation
MaxBe adjusted into the scope of 150～500 μ m,
In the drilling/rolling operation, so that the aperture W of guide reel
GAperture W with home roll
RRatio (W
G/ W
R) mode in 1.10～1.20 scope bores a hole.
2. the manufacturing approach of high-alloy seamless steel pipe according to claim 1 is characterized in that,
Heat being rolled in the scope that the part surface temperature is formed on 900～1250 ℃ when making perforation.
3. the manufacturing approach of high-alloy seamless steel pipe according to claim 1 and 2 is characterized in that,
In the drilling/rolling operation, so that the half-angle θ that the rolling surface of perforating head is become with roll line
PThe half-angle θ that is become with roll line with the exit face of home roll
RPoor (θ
P-θ
R) mode that is formed in 0～3.0 ° the scope bores a hole.
4. the manufacturing approach of high-alloy seamless steel pipe according to claim 1 and 2 is characterized in that,
Used home roll when adopting the perforation of seamless steel pipe of ordinary steel.
5. the manufacturing approach of high-alloy seamless steel pipe according to claim 3 is characterized in that,
Used home roll when adopting the perforation of seamless steel pipe of ordinary steel.
6. the manufacturing approach of high-alloy seamless steel pipe according to claim 4 is characterized in that,
The flow of roller cooling water is 1000～1500l/ minute when the perforation of the seamless steel pipe that carries out ordinary steel.
7. the manufacturing approach of high-alloy seamless steel pipe according to claim 5 is characterized in that,
The flow of roller cooling water is 1000～1500l/ minute when the perforation of the seamless steel pipe that carries out ordinary steel.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-087150 | 2008-03-28 | ||
| JP2008087150A JP4371247B2 (en) | 2008-03-28 | 2008-03-28 | Manufacturing method of high alloy seamless steel pipe |
| PCT/JP2008/072006 WO2009118957A1 (en) | 2008-03-28 | 2008-12-04 | High-alloy seamless steel pipe manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101980801A CN101980801A (en) | 2011-02-23 |
| CN101980801B true CN101980801B (en) | 2012-12-05 |
Family
ID=41113179
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|---|---|---|---|
| CN2008801283458A Active CN101980801B (en) | 2008-03-28 | 2008-12-04 | High-alloy seamless steel pipe manufacturing method |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20110023570A1 (en) |
| EP (1) | EP2286934B1 (en) |
| JP (1) | JP4371247B2 (en) |
| CN (1) | CN101980801B (en) |
| BR (1) | BRPI0822466B1 (en) |
| MX (1) | MX2010010438A (en) |
| WO (1) | WO2009118957A1 (en) |
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|---|---|---|---|---|
| CN102773303B (en) * | 2012-07-16 | 2014-07-30 | 中国船舶重工集团公司第七二五研究所 | Copper nickel alloy large-size thick-wall seamless pipe manufacturing process |
| US10232418B2 (en) * | 2014-03-19 | 2019-03-19 | Nippon Steel & Sumitomo Metal Corporation | Method for producing seamless metal pipe |
| CN104588411A (en) * | 2015-01-26 | 2015-05-06 | 张家港兴业钢管有限公司 | Perforating machine for producing seamless steel tube |
| WO2021220653A1 (en) * | 2020-04-30 | 2021-11-04 | Ｊｆｅスチール株式会社 | Inclined rolling equipment, method for producing seamless tube blank, and method for producing seamless steel tube |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1135382A (en) * | 1995-05-10 | 1996-11-13 | 住友金属工业株式会社 | Method for boring/rolling seamless steel pipe and apparatus thereof |
| JP2898775B2 (en) * | 1991-04-17 | 1999-06-02 | 川崎製鉄株式会社 | Inclined rolling method for seamless steel pipe |
| US6073331A (en) * | 1995-05-19 | 2000-06-13 | Nkk Corporation | Method for manufacturing seamless pipe |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07102372B2 (en) * | 1991-09-12 | 1995-11-08 | 川崎製鉄株式会社 | Pipe tilt rolling method |
| JPH06262219A (en) | 1993-03-16 | 1994-09-20 | Nippon Steel Corp | Disk guide roll for rolling steel tube |
| JP2996077B2 (en) * | 1993-11-02 | 1999-12-27 | 住友金属工業株式会社 | Piercing method of seamless metallic tube |
| US5813962A (en) * | 1996-06-28 | 1998-09-29 | Kawasaki Steel Corporation | Forged roll for rolling a seamless steel pipe |
| JPH1081937A (en) * | 1996-06-28 | 1998-03-31 | Taiheiyo Seiko Kk | Forging roll for seamless steel tube and its production |
| JPH11285709A (en) | 1998-04-01 | 1999-10-19 | Nippon Steel Corp | Guide shoe for piercing and rolling seamless steel tube |
| JP3633434B2 (en) | 1999-07-26 | 2005-03-30 | 住友金属工業株式会社 | Martensitic stainless steel seamless pipe manufacturing method |
| JP4958346B2 (en) | 2001-08-10 | 2012-06-20 | 住友金属工業株式会社 | Seamless pipe manufacturing method |
| JP4359783B2 (en) * | 2004-05-28 | 2009-11-04 | 住友金属工業株式会社 | Seamless steel pipe manufacturing method |
-
2008
- 2008-03-28 JP JP2008087150A patent/JP4371247B2/en active Active
- 2008-12-04 EP EP08873626.9A patent/EP2286934B1/en active Active
- 2008-12-04 MX MX2010010438A patent/MX2010010438A/en active IP Right Grant
- 2008-12-04 CN CN2008801283458A patent/CN101980801B/en active Active
- 2008-12-04 BR BRPI0822466A patent/BRPI0822466B1/en active IP Right Grant
- 2008-12-04 WO PCT/JP2008/072006 patent/WO2009118957A1/en active Application Filing
-
2010
- 2010-09-21 US US12/887,100 patent/US20110023570A1/en not_active Abandoned
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2898775B2 (en) * | 1991-04-17 | 1999-06-02 | 川崎製鉄株式会社 | Inclined rolling method for seamless steel pipe |
| CN1135382A (en) * | 1995-05-10 | 1996-11-13 | 住友金属工业株式会社 | Method for boring/rolling seamless steel pipe and apparatus thereof |
| US6073331A (en) * | 1995-05-19 | 2000-06-13 | Nkk Corporation | Method for manufacturing seamless pipe |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平8-1210A 1996.01.09 |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0822466A2 (en) | 2015-06-16 |
| BRPI0822466B1 (en) | 2020-04-22 |
| JP4371247B2 (en) | 2009-11-25 |
| CN101980801A (en) | 2011-02-23 |
| MX2010010438A (en) | 2010-12-15 |
| JP2009241075A (en) | 2009-10-22 |
| WO2009118957A1 (en) | 2009-10-01 |
| EP2286934A1 (en) | 2011-02-23 |
| EP2286934B1 (en) | 2015-03-04 |
| US20110023570A1 (en) | 2011-02-03 |
| EP2286934A4 (en) | 2013-10-09 |
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