CN106238465B - A kind of preparation method of PH stainless steel seamless steel pipe - Google Patents
A kind of preparation method of PH stainless steel seamless steel pipe Download PDFInfo
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- CN106238465B CN106238465B CN201610654968.5A CN201610654968A CN106238465B CN 106238465 B CN106238465 B CN 106238465B CN 201610654968 A CN201610654968 A CN 201610654968A CN 106238465 B CN106238465 B CN 106238465B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 51
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 51
- 239000010935 stainless steel Substances 0.000 title claims abstract description 51
- 239000010959 steel Substances 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000004513 sizing Methods 0.000 claims abstract description 22
- 238000005096 rolling process Methods 0.000 claims abstract description 18
- 238000005098 hot rolling Methods 0.000 claims abstract description 14
- 238000009785 tube rolling Methods 0.000 claims abstract description 12
- 229910000734 martensite Inorganic materials 0.000 claims description 10
- 238000004881 precipitation hardening Methods 0.000 claims description 7
- 238000007689 inspection Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 20
- 239000000047 product Substances 0.000 abstract description 18
- 238000011084 recovery Methods 0.000 abstract description 7
- 238000009826 distribution Methods 0.000 abstract description 3
- 239000012467 final product Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 34
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- 238000005097 cold rolling Methods 0.000 description 4
- 238000001192 hot extrusion Methods 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- QFGIVKNKFPCKAW-UHFFFAOYSA-N [Mn].[C] Chemical compound [Mn].[C] QFGIVKNKFPCKAW-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 1
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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention belongs to steel pipe rolling technical fields, and in particular to a kind of preparation method of PH stainless steel seamless steel pipe.Preparation method of the present invention, comprising the following steps: a, annular stove heating: heating temperature is 1140~1160 DEG C；B, punch is perforated: using micro- expanding form perforation；C, hot rolling: A-R precision Tube Rolling Train tube rolling is used；D, sizing to get.The present invention can also preferably share perforation with rolling load, guarantee that production process can be gone on smoothly；By parameter adjusting and optimizing, guarantee that product quality meets user's requirement；By sizing mill deformation distribution, final product quality is finally controlled, the lumber recovery of product is improved, reduces processing charges and process-cycle, saved production cost.
Description
Technical field
The invention belongs to steel pipe rolling technical fields, and in particular to a kind of preparation of PH stainless steel seamless steel pipe
Method.
Background technique
Gapless stainless steel tube abbreviation seamless pipe.Gapless stainless steel tube rough surface, length is without scale.Gapless stainless steel tube master
It is used in the equipment such as boiler, central air-conditioning, steel construction, machining, pipe gas, fire-fighting.
For PH stainless steel seamless steel pipe, since its alloy content is higher, the perforation under high temperature is negative
Lotus is much higher than plain C-Mn steel product, and the main production object of existing steel pipe's production equipment domestic at present be common carbon manganese or
Middle-low alloy steel, hot rolling high-alloy steel and stainless steel have larger difficulty.In particular for the martensitic precipitation hardening type such as 17-4PH
Stainless-steel seamless pipe, main production technology are " hot extrusion+cold rolling ", and main product is small-caliber seamless steel pipe.One
As round billet carry out hot extrusion before, through-hole need to be drawn, then use hot extrusion, the pipe of specification close with fished pipe is made, most
Final products are produced by the way of cold rolling eventually.In traditional handicraft, since process is many and diverse, the problems such as process flow is long, lead
Cause production efficiency low, high production cost, and total lumber recovery is less than 70%.And the martensitic precipitation hardening type stainless steel such as 17-4PH
Reasonable deformation temperature section be 1100~1180 DEG C, far below 1250 DEG C of plain C-Mn steel product.Therefore, martensitic precipitation
There is the features such as deformation is difficult, and perforation load is big, and deformation temperature range is narrow, is also easy to produce defect in hardened stainless steel.
Application No. is " 200810039375.3 ", the entitled " system of seamless steel tubes made of martensite precipitation hardening stainless steel
Preparation Method " discloses a kind of processing step are as follows: pipe → peeling → blanking → heating → hot piercing → cooling → finishing → pickling
The preparation martensitic precipitation that → lubrication → cold rolling → degreasing → heat treatment → aligning → Pipe Cutting → pickling → is examined → is packed and stored
The method of hardening stainless steel seamless steel pipe, the processing step is cumbersome, and process flow is long, at high cost, final pipe to finished product at
Material rate can only achieve 51.31%, still not be able to satisfy at present to PH stainless steel seamless steel pipe high yield, low cost
Deng requirement.
Therefore, in view of the deficiencies of the prior art, it is urgent to provide a kind of simple process, process are short, at low cost, finished product lumber recovery
The preparation method of high PH stainless steel seamless steel pipe.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of simple process and low cost, high stainless of product lumber recovery
The preparation method of steel seamless steel tube.
A kind of preparation method of PH stainless steel seamless steel pipe, comprising the following steps: annular stove heating → perforation
Machine perforation → hot rolling → sizing → inspection, packaging；Specific step is as follows:
A, annular stove heating: in annular furnace, with the rate of heat addition of 150~200 DEG C/h by heating of pipe blank to 850 DEG C, then
1140~1160 DEG C are heated to the rate of heat addition of 250~300 DEG C/h, keeps the temperature 0.5~1.5h；
B, punch is perforated: being perforated using micro- expanding form to the pipe after the heating of a step；Wherein punch is worn
Hole roller diameter is 1100~1300mm, and perforating roller length is 900~1100mm；Ovality >=1.05, roll off angle be -0.1 °~-
0.3 °, 300~380mm is come directly towards, the top amount of stretching is 200~250mm, 120 turns/min of revolving speed <；The outer diameter of the hollow billet obtained after perforation
For 290~300mm, internal diameter is 260~270mm；
C, hot rolling: tube rolling is carried out to hollow billet using A-R precision Tube Rolling Train, obtains hot-rolled pipe；Wherein, rolling angle be 5 °~
7 °, feed angle is 7 °~15 °, and rolling rate is 1~1.5m/s；Hot rolling pipe outside diameter be 280~290mm, internal diameter be 260~
270mm；
D, to hot-rolled pipe carry out sizing to get.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method, wherein pipe heating temperature is 1150 DEG C in annular furnace in a step, soaking time 1h.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method, wherein b step middle punch machine diameter is 1200mm, and perforating roller length is 1000mm.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method, wherein ovality is 1.08 in b step, and roll off angle is -0.17 °, comes directly towards 35mm, and the top amount of stretching is 243mm, revolving speed 80
Turn/min.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method, the outer diameter of the hollow billet wherein obtained after b step middle punch are 298mm, internal diameter 268mm.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method, wherein rolling angle is 5.5 ° in step c, and feed angle is 14 °.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method, it is 1.2m/s that rate is wherein rolled in step c.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method, wherein hot rolling pipe outside diameter is 288mm, internal diameter 268mm in step c.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method wherein carries out sizing using three-roll sizing mill group in Step d.
The present invention uses on A-R precision pipe mill, passes through " annular stove heating → punch perforation → hot rolling → sizing "
Technique, realize and directly produce the martensitic precipitation hardening type stainless steel jointless such as 17-4PH using an A-R precision Tube Rolling Train
Steel pipe.The alternative martensitic precipitation hardening type stainless steel main production " hot extrusion+cold rolling ", while this hair at present of this technique
It is bright also perforation preferably to be shared with rolling load, guarantee that production process can be gone on smoothly；By parameter adjusting and optimizing,
Guarantee that product quality meets user's requirement；By sizing mill deformation distribution, finally control final product quality, improve product at
Material rate, reduces processing charges and process-cycle, has saved production cost.
Specific embodiment
A kind of preparation method of PH stainless steel seamless steel pipe, comprising the following steps: annular stove heating → perforation
Machine perforation → hot rolling → sizing → inspection, packaging；Specific step is as follows:
A, annular stove heating: in annular furnace, with the rate of heat addition of 150~200 DEG C/h by heating of pipe blank to 850 DEG C, then
1140~1160 DEG C are heated to the rate of heat addition of 250~300 DEG C/h, keeps the temperature 0.5~1.5h；
It is the thermal conductivity of the martensitic stain less steel (lower than 850 DEG C) because when temperature is lower using different heating rates heating
Less than the 1/2 of ordinary carbon steel, temperature conduction speed is fast, if heating speed is too fast, easily causes hull-skin temperature higher, and interior table
Face temperature is lower, and the biggish temperature difference generates great differences in expansion, and blank surface is caused to crack；And (it is higher than 850 in high temperature section
DEG C) when, thermal conductivity difference is not obvious, and the rate of heat addition can be improved；
Wherein, the radius of the annular furnace is 4500mm；
B, punch is perforated: being perforated using micro- expanding form to the pipe after the heating of a step；Wherein punch is worn
Hole roller diameter is 1100~1300mm, and perforating roller length is 900~1100mm；Ovality >=1.05, roll off angle be -0.1 °~-
0.3 °, 300~380mm is come directly towards, the top amount of stretching is 200~250mm, 120 turns/min of revolving speed <；The outer diameter of the hollow billet obtained after perforation
For 290~300mm, internal diameter is 260~270mm；The present invention is perforated using two-roll piercer (i.e. cone mill)；Its
In, ovality=lead/roll spacing；If ovality is too small, load when perforation generally can be relatively high, and deformation is relatively difficult,
Therefore present invention preferably employs ovality >=1.05；
In addition, top front reduction ratio can control by the control of the top amount of stretching, thus the load of one side influence of rolled, separately
On the one hand it can improve the inner surface quality for the hollow billet produced；
C, hot rolling: tube rolling is carried out to hollow billet using A-R precision Tube Rolling Train (i.e. two rollers tiltedly prick machine), obtains hot-rolled pipe；；Its
In, rolling angle is 5 °~7 °, and feed angle is 7 °~15 °, and rolling rate is 1~1.5m/s；The outer diameter of steel pipes obtained after rolling is
280~290mm, internal diameter are 260~270mm；On the one hand controlling the above parameter is the load for reducing production unit, it is steady to improve production
It is qualitative；On the other hand it is to follow Deformation Theory principle by parameter setting, improves the quality of product；
D, to hot-rolled pipe carry out sizing to get.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method, wherein pipe heating temperature is 1150 DEG C in annular furnace in a step, soaking time 1h.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method, wherein b step middle punch machine diameter is 1200mm, and perforating roller length is 1000mm.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method, wherein ovality is 1.08 in b step, and roll off angle is -0.17 °, comes directly towards 35mm, and the top amount of stretching is 243mm, revolving speed 80
Turn/min.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method, the outer diameter of the hollow billet wherein obtained after b step middle punch are 298mm, internal diameter 268mm.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method, wherein rolling angle is 5.5 ° in step c, and feed angle is 14 °.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method, it is 1.2m/s that rate is wherein rolled in step c.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method, wherein hot rolling pipe outside diameter is 288mm, internal diameter 268mm in step c.
Further, technical solution more preferably, a kind of above-mentioned preparation of PH stainless steel seamless steel pipe
Method wherein uses multi-frame sizing in Step d, it is preferred to use three-roll sizing mill group carries out sizing.
For PH stainless steel seamless steel pipe, since its alloy content is higher, the perforation under high temperature is negative
Lotus is much higher than plain C-Mn steel product, and the main production object of existing steel pipe's production equipment domestic at present be common carbon manganese or
Middle-low alloy steel, hot rolling high-alloy steel and stainless steel have larger difficulty.And the martensitic precipitation hardening type stainless steel such as 17-4PH
Reasonable deformation temperature section is 1100~1180 DEG C, far below 1250 DEG C of plain C-Mn steel product.It is hard for martensitic precipitation
The characteristics of deformation of change type stainless steel is difficult, and the big feature of perforation load, deformation temperature range is narrow, is also easy to produce defect, designs this hair
Bright technique, is mainly characterized in that:
(1) perforation can effectively reduce perforation load using micro- expanding form perforation in this way.
(2) when perforating, using compared with product, smaller ovality and the bigger top amount of stretching can reduce steel pipe in this way and lack
Sunken generation.
(3) by main deflection, finishing rolling mill process is concentrated on, deformation is concentrated, is precisely controlled.
(4) eventually by sizing process, fished pipe production is completed, finished product is formed.
The advantages of being designed in this way include:
(1) perforation can preferably be shared with rolling load, guarantees that production process can be gone on smoothly；
(2) by parameter adjusting and optimizing, guarantee that product quality meets user's requirement；
(3) by sizing mill deformation distribution, final product quality is finally controlled；
(4) present invention can shorten process flow, use with hot Dai Leng, reduce production process, improve product total lumber recovery,
Reduce production cost.
A specific embodiment of the invention is further described below with reference to embodiment, is not therefore limited the present invention
System is among the embodiment described range.
Embodiment 1
Stripped off the skin blank using 3 Φ 280mm, 17-4PH, boring 70mm through-hole, 159 unit punches as follows in
Design technology is produced；
One, annular stove heating: in annular furnace, with the rate of heat addition of 150~200 DEG C/h by heating of pipe blank to 850 DEG C, then
1140~1160 DEG C are heated to the rate of heat addition of 250~300 DEG C/h, keeps the temperature 0.5~1.5h；Wherein, the half of the annular furnace
Diameter is 4500mm；
Two, it is perforated using two-roll piercer (i.e. cone mill), wherein the perforation roller diameter of punch is
1200mm, perforating roller length are 1000mm；24s is about when entire perforation, perforation manufacturing parameter is as shown in table 1 below:
1 piercing process parameter of table
Three, after smoothly completing perforation, hollow billet is transported to A-R precision Tube Rolling Train and is rolled, rolling is using production
Parameter is as shown in table 2 below:
2 hot-rolled process parameter of table
| Group number | Diameter of mandrel/mm | Rolling angle/° | Feed angle/° | Tube rolling wall thickness/mm after rolling | Roll rate/m/s |
| 1 | 264 | 5.5 | 14 | 12 | 1.2 |
| 2 | 264 | 6 | 10 | 13 | 1.5 |
| 3 | 264 | 6.5 | 8 | 14 | 1 |
Four, sizing is carried out using three-roll sizing mill group, the tube rolling length obtained after sizing can reach 7500mm or more, mainly
Lumber recovery loss cutting head amount for scaling loss and end to end, cutting head amount is about 300mm end to end, the stainless steel tube produced using present invention process
Lumber recovery is up to 90% or more.
Claims (8)
1. a kind of preparation method of PH stainless steel seamless steel pipe, comprising the following steps: annular stove heating → punch
Perforation → hot rolling → sizing → inspection, packaging；It is characterized by:
A, annular stove heating: in annular furnace, with the rate of heat addition of 150~200 DEG C/h by heating of pipe blank to 850 DEG C, then with 250
The rate of heat addition of~300 DEG C/h is heated to 1140~1160 DEG C, keeps the temperature 0.5~1.5h；
B, punch is perforated: being perforated using micro- expanding form to the pipe after the heating of a step；The wherein perforating roller of punch
Diameter is 1100~1300mm, and perforating roller length is 900~1100mm；Ovality >=1.05, roll off angle are -0.1 °~-0.3 °,
300~380mm is come directly towards, the top amount of stretching is 200~250mm, 120 turns/min of revolving speed <；The outer diameter of the hollow billet obtained after perforation is 290
~300mm, internal diameter are 260~270mm；
C, hot rolling: tube rolling is carried out to hollow billet using A-R precision Tube Rolling Train, obtains hot-rolled pipe；Wherein, roll off angle is 5 °~7 °,
Feed angle is 7 °~15 °, and rolling rate is 1~1.5m/s；Hot rolling pipe outside diameter is 280~290mm, and internal diameter is 260~270mm；
D, to hot-rolled pipe carry out sizing to get；
Wherein, the PH stainless steel seamless steel pipe is martensitic precipitation hardening type stainless-steel seamless pipe.
2. a kind of preparation method of PH stainless steel seamless steel pipe according to claim 1, it is characterised in that: a step
Pipe heating temperature is 1150 DEG C in annular furnace in rapid, soaking time 1h.
3. a kind of preparation method of PH stainless steel seamless steel pipe according to claim 1, it is characterised in that: b step
The perforation roller diameter of rapid middle punch machine is 1200mm, and perforating roller length is 1000mm.
4. a kind of preparation method of PH stainless steel seamless steel pipe according to claim 1, it is characterised in that: b step
The outer diameter of the hollow billet obtained after rapid middle punch is 298mm, internal diameter 268mm.
5. a kind of preparation method of PH stainless steel seamless steel pipe according to claim 1, it is characterised in that: c step
Roll off angle is 5.5 ° in rapid, and feed angle is 14 °.
6. a kind of preparation method of PH stainless steel seamless steel pipe according to claim 1, it is characterised in that: c step
Rolling rate is 1.2m/s in rapid.
7. a kind of preparation method of PH stainless steel seamless steel pipe according to claim 1, it is characterised in that: c step
The outer diameter of hot-rolled pipe is 288mm, internal diameter 268mm in rapid.
8. a kind of preparation method of PH stainless steel seamless steel pipe according to claim 1, it is characterised in that: d step
Sizing is carried out using three-roll sizing mill group in rapid.
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| CN201610654968.5A CN106238465B (en) | 2016-08-11 | 2016-08-11 | A kind of preparation method of PH stainless steel seamless steel pipe |
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| CN201610654968.5A CN106238465B (en) | 2016-08-11 | 2016-08-11 | A kind of preparation method of PH stainless steel seamless steel pipe |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101612700A (en) * | 2008-06-23 | 2009-12-30 | 宝山钢铁股份有限公司 | The preparation method of seamless steel tubes made of martensite precipitation hardening stainless steel |
| CN101811149A (en) * | 2010-04-14 | 2010-08-25 | 新兴铸管股份有限公司 | Manufacturing method of high alloy seamless steel tube |
| JP2013094826A (en) * | 2011-11-01 | 2013-05-20 | Nippon Steel & Sumitomo Metal Corp | Seamless-metal-pipe manufacturing method |
| CN104874606A (en) * | 2015-06-16 | 2015-09-02 | 攀钢集团成都钢钒有限公司 | Production method of high-chromium ferrite stainless steel seamless pipe |
| CN104907353A (en) * | 2015-06-16 | 2015-09-16 | 攀钢集团成都钢钒有限公司 | Production method of high-chromium ferrite stainless-steel seamless steel pipe blank |
-
2016
- 2016-08-11 CN CN201610654968.5A patent/CN106238465B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101612700A (en) * | 2008-06-23 | 2009-12-30 | 宝山钢铁股份有限公司 | The preparation method of seamless steel tubes made of martensite precipitation hardening stainless steel |
| CN101811149A (en) * | 2010-04-14 | 2010-08-25 | 新兴铸管股份有限公司 | Manufacturing method of high alloy seamless steel tube |
| JP2013094826A (en) * | 2011-11-01 | 2013-05-20 | Nippon Steel & Sumitomo Metal Corp | Seamless-metal-pipe manufacturing method |
| CN104874606A (en) * | 2015-06-16 | 2015-09-02 | 攀钢集团成都钢钒有限公司 | Production method of high-chromium ferrite stainless steel seamless pipe |
| CN104907353A (en) * | 2015-06-16 | 2015-09-16 | 攀钢集团成都钢钒有限公司 | Production method of high-chromium ferrite stainless-steel seamless steel pipe blank |
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