CN101410535A - Method for production of martensitic stainless steel pipe - Google Patents
Method for production of martensitic stainless steel pipe Download PDFInfo
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- CN101410535A CN101410535A CNA2007800109977A CN200780010997A CN101410535A CN 101410535 A CN101410535 A CN 101410535A CN A2007800109977 A CNA2007800109977 A CN A2007800109977A CN 200780010997 A CN200780010997 A CN 200780010997A CN 101410535 A CN101410535 A CN 101410535A
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- 229910001105 martensitic stainless steel Inorganic materials 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 abstract description 11
- 239000000126 substance Substances 0.000 abstract description 4
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000005336 cracking Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 14
- 208000037656 Respiratory Sounds Diseases 0.000 description 8
- 230000003628 erosive effect Effects 0.000 description 5
- 230000003111 delayed effect Effects 0.000 description 4
- 229910052758 niobium Inorganic materials 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 229910052720 vanadium Inorganic materials 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 238000007669 thermal treatment Methods 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 102220259718 rs34120878 Human genes 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Disclosed is a method for production of a martensitic stainless steel pipe having the following chemical composition (by mass): C: 0.15-0.22%; Si: 0.10-1.00%; Mn: 0.10-1.00%; Cr: 12.00-14.00%; N: 0.01-0.05%; P: 0.020% or less; and S: 0.010% or less, with the remainder being Fe and unavoidable impurities. After the martensitic stainless steel pipe is produced, the steel pipe is air-cooled until the temperature of the outer surface of the steel pipe becomes 135 to 175 DEG C, and the end part of the pipe is then cut. The crack sensitivity of the steel pipe can be reduced. By cutting the steel pipe at a temperature falling within a specific range, the cracking of the cut section can be prevented and the formation of burr can also be prevented.
Description
Technical field
The present invention relates to a kind of manufacture method of martensitic stainless steel pipe.
Background technology
Because the crack sensitivity of martensitic stainless steel pipe such as 13Cr is higher, therefore, when with the end of the disconnected pipe of sawing, can crack.In order addressing this problem, pipe to be cooled off in the past, the outside surface of the pipe before cutting off (below, abbreviate " surface " as) temperature to be cooled to preferably be cooled to below 50 ℃ below 130 ℃.
Such invention is disclosed in the patent documentation 1, that is,, the temperature of the martensitic stainless steel pipe after the hot-work is cooled to below the martensitic transformation end temp in air in order to prevent the pipe end crackle of martensitic stainless steel pipe, correct cooling with water-cooled then, begin to cut off processing then.
Patent documentation 1: Japanese kokai publication hei 4-2409 communique
When pipe being cooled off when making its surface temperature reach low temperature such below 30 ℃, the hot workability of pipe reduces, and the resistance to deformation that adds man-hour becomes big.Therefore, between the cut surface of pipe and saw, produce higher processing heating, be easy to generate overlap after the cut-out.Usually, the pipe that many undercuts are disconnected is carried together in order to boost productivity.At this moment, if having overlap at pipe end, then pipe contacts to each other and produces external defects.
Invention in the above-mentioned patent documentation 1 forces cooling apparatus to improve manufacturing cost owing to setting up.
As mentioned above, former studies when cutting off martensitic stainless steel pipe, prevent to crack, but unexposed inhibition produces the technology of overlap.
Summary of the invention
The object of the present invention is to provide and a kind ofly can prevent from when cutting off pipe end, to crack and the manufacture method of the martensitic stainless steel pipe of overlap.
The present invention makes in order to achieve the above object, it will be intended to, a kind of manufacture method of martensitic stainless steel pipe, it is characterized in that, making in quality % by C:0.15～0.22%, Si:0.10～1.00%, M n:0.10～1.00%, Cr:12.00～14.00%, N:0.01%～0.05%, below the P:0.020%, below the S:0.010%, after all the other are the martensitic stainless steel pipe that constitutes of Fe and unavoidable impurities, the outer surface of steel tube temperature is cooled to 135～175 ℃ in air, cuts off tube end then.
In above-mentioned martensitic stainless steel pipe, preferably replace the part of Fe, in quality % contain below V:0.200%, below the Ti:0.200%, below the Nb:0.200% and below the B:0.0100% more than a kind of selection.In addition, in this pipe, also can replace a Fe part, in quality % contain below Ni:0.5%, below the Cu:0.25% and below the Ca:0.0050% more than a kind of selection.In this pipe, can also replace the part of Fe, % contains below the Al:0.1% in quality.
Adopt the present invention, can when cutting off the pipe end of martensitic stainless steel pipe, not crack and suppress to produce overlap.
Description of drawings
The figure that the surface temperature of the pipe that Fig. 1 is expression when cutting off and the pipe end crackle that the external diameter degree of finish has been put pipe in order and overlap produce situation.
Embodiment
In the manufacture method of martensitic stainless steel pipe of the present invention, use the reasons are as follows of martensitic stainless steel pipe that mentioned component forms.
C：
C and N are the solution strengthening effective elements to the pipe after making.For the quilt impact that prevents to be caused by solution strengthening adds the delayed fracture of the Ministry of worker and need make C content is below 0.22%.But, if C content less than 0.15%, then can not be guaranteed suitable intensity after the thermal treatment.And,, therefore,, then can produce the internal fracture defective behind the tubulation that causes by delta ferrite if excessively reduce C content because C generates austenitic element.Therefore, making C content is 0.15～0.22%.Preferred lower limit is 0.18%, and preferred upper limit is 0.21%.
Si：
Si is the reductor effective elements as steel.In order to obtain its effect, need make Si content is more than 0.10%.On the other hand, toughness variation then when Si content surpasses 1.00%.In order to ensure the toughness of necessity, preferably its content is below 0.75%.Preferred lower limit is 0.20%, and preferred upper limit is 0.35%.
Mn：
Mn is the element that improves the intensity of steel effectively.And, have desoxydatoin equally with Si.And, the S in the steel can be fixed as MnS, improve hot workability.Above-mentioned effect is 0.10% above time performance at Mn content.On the other hand, toughness variation then when Mn content surpasses 1.00%.Therefore, making Mn content is 0.10～1.00%.
Cr：
Cr is the basal component that is used to improve the erosion resistance of steel.Particularly contain 12.00% erosion resistance that can improve when above at pitting attack and crevice corrosion, and significantly improving the erosion resistance under the CO2 environment.On the other hand, when Cr content surpasses 14.00%, at high temperature add and to generate delta ferrite man-hour and make the hot workability variation.In addition, excessively add Cr and can improve manufacturing cost.Therefore, making Cr content is 12.00～14.00%.Preferred lower limit is 12.40%, and preferred upper limit is 13.10%.
N：
N is an austenite stabilizer element, is used to improve the hot workability of steel, prevents to produce defect in inner surface.In order to obtain this effect, need make N content is more than 0.01%.On the other hand, if exceedingly contain N, then can cause the delayed fracture that is added the Ministry of worker by impact.Therefore, make N content on be limited to 0.05%.Preferred lower limit is 0.02, and preferred upper limit is 0.035%.
P：
P is contained in element in the steel as impurity.If the content of P is too much, then can reduce the toughness of the pipe after the thermal treatment.Therefore, making the high limit of tolerance value of P is 0.020%.The content of preferred P is few as far as possible.
S：
S is contained in element in the steel as impurity, and the hot workability of steel is reduced.The content of S is few more good more, but can allow 0.010%.Preferred content is below 0.003%.
The martensitic stainless steel pipe of manufacture method of the present invention has above-mentioned chemical constitution, and all the other are made of Fe and impurity.In order to prevent to be impacted the delayed fracture that adds the Ministry of worker, in this pipe, can replace the part of Fe, and contain from V, Ti, Nb and B, select more than a kind.In addition,, in this pipe, can replace a Fe part in order to improve hot workability, and contain from Ni, Cu and Ca, select more than a kind.In addition, produce outside sandwich, in this pipe, can also contain Al in order to prevent pipe.The preferred content and the qualification thereof of interpolation element be the reasons are as follows described arbitrarily for each.
V, Ti, Nb and B:
These elements can not contain yet.But,, then can bring into play the effect that prevents to be impacted the delayed fracture that adds the Ministry of worker if contain these elements.Therefore, preferably contain from these elements, select more than a kind.But,, then can improve hardness because of the nitride that generates after the thermal treatment if content is too much.Therefore, cause reduction erosion resistance and toughness.In addition, also can become the uneven reason of intensity.Therefore, V, Ti, Nb need be limited in below 0.200%, B is limited in below 0.0100%.Can bring into play above-mentioned effect as long as these elements contain trace, but preferably contain V, Ti, Nb is more than 0.005%, containing B is more than 0.0005%.
Ni, Cu and Ca
These elements can not contain yet.
Ni is an austenite stabilizer element, if contain the hot workability that can improve steel.But, when its content is superfluous, can reduce the crackle of anti-sulphide stress corrosion property, therefore, preferably making its content is 0.5%.In addition, also can bring into play above-mentioned effect, but it is remarkable to contain 0.001% effect when above even contain trace.
Cu is the element that improves the erosion resistance of steel.And, be austenite stabilizer element, therefore, have the effect of the hot workability of improving steel.But, if the Cu content surplus of low melting point can reduce hot workability on the contrary.Therefore, containing under the situation of Cu, preferably making its content is below 0.25%.In addition, even trace also can be brought into play above-mentioned effect, be that 0.001% effect when above is remarkable but contain Cu.
Ca can combine with the S in the steel, thereby prevents to cause that owing to grain circle's segregation of S hot workability reduces.If contain the reason that Ca then becomes hairline in large quantities, therefore, containing under the situation of Ca, preferably making its content is 0.0050%.In addition, even trace also can be brought into play above-mentioned effect, but it is remarkable to contain 0.0001% effect when above.
Al：
Al can not contain yet.Al is very effective as the reductor of steel.And, also effective to preventing that pipe from producing outside sandwich.But, if its content is too much, then can reduce the wash degree of steel, and the obstruction of dipping mouth can take place when continuous casting.Therefore, containing under the situation of Al, preferably making its content is 0.1%.In addition, even trace also can be brought into play above-mentioned effect, be that 0.001% effect when above is remarkable but contain Al.
In the manufacture method of martensitic stainless steel pipe of the present invention, make after the martensitic stainless steel pipe with above-mentioned chemical constitution, the surface temperature of pipe is cooled to 135～175 ℃ in air, cut off tube end then.It the reasons are as follows described.
The surface temperature of pipe surpasses under 175 ℃ the situation when cutting off, and may crack at tube end.On the other hand, when being cooled to, may reduce crack sensitivity, after cut-out, produce overlap, cause when carrying, producing external defects less than 135 ℃.
Embodiment
Melting has the steel billet of the chemical ingredients shown in the table 1, utilizes Mannesmann's mandrel mill to carry out hot-work, manufactures various external diameters weldless steel tube (that is various external diameter degree of finish), length 10m.With reheat in the stove of 1050 ℃ of temperature in this Guan Zailu 16 minutes, in air, cool off then.
When various surface temperature, cut off tube end under the conditions shown in Table 3 with saw with the cutter shown in the table 2, after the cut-out, estimated the generation of crackle and overlap with following evaluation method.In addition, with the radiation thermometer measure surface temperature of pipe.
The crackle evaluation method
With shotblasting machine remove the pipe surfaces externally and internally oxide skin after carry out pickling, estimated flawless by outside surface visual inspection end.
The overlap evaluation method
The maximum length of the overlap of measuring tube cut-out portion is that 20mm is judged as when above and has produced overlap in the overlap maximum length.
Table 1
| C | Si | Mn | Cr | N | P | S | All the other |
| 0.19 | 0.23 | 0.46 | 12.49 | 0.0285 | 0.013 | 0.0010 | Fe and unavoidable impurities |
Unit (quality %)
Table 2
| Material | External diameter (mm) | The sword number |
| S55C | 1370 | 400 |
Table 3
| Cutter circumferential speed (m/min) | Cut-off velocity (mm/sec) |
| 6900 | 5.0 |
The figure that the surface temperature of the pipe that Fig. 1 is expression when cutting off and the pipe end crackle that the external diameter degree of finish has been put pipe in order and overlap produce situation.As shown in Figure 1, when cutting off in temperature range of the present invention (135～175 ℃), crackle, overlap all do not produce, for well.
On the other hand, surpassing when cutting off under 175 ℃ the temperature outside temperature range of the present invention produced crackle.In addition, outside temperature range of the present invention when cutting off under 135 ℃ the temperature, produced overlap.
The invention is not restricted to above-mentioned example, self-evident, also can in the described technical characterictic scope of each claim, suitably change embodiment.
Claims (4)
1. the manufacture method of a martensitic stainless steel pipe, it is characterized in that, making in quality % by C:0.15～0.22%, Si:0.10～1.00%, Mn:0.10～1.00%, Cr:12.00～14.00%, N:0.01%～0.05%, below the P:0.020%, below the S:0.010%, after all the other are the martensitic stainless steel pipe that constitutes of Fe and unavoidable impurities, the outer surface of steel tube temperature is cooled to 135～175 ℃ in air, cuts off tube end then.
2. the manufacture method of martensitic stainless steel pipe according to claim 1, it is characterized in that, in martensitic stainless steel pipe, a part that replaces Fe, in quality % contain below V:0.200%, more than a kind of selection below the Ti:0.200%, below the Nb:0.200% and below the B:0.0100%.
3. the manufacture method of martensitic stainless steel pipe according to claim 1 and 2, it is characterized in that, in martensitic stainless steel pipe, replace the part of Fe, in quality % contain below Ni:0.5%, more than a kind of selection below the Cu:0.25% and below the C a:0.0050%.
4. according to the manufacture method of each described martensitic stainless steel pipe of claim 1～3, it is characterized in that in martensitic stainless steel pipe, replace the part of Fe, % contains below the Al:0.1% in quality.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006094737A JP2007270191A (en) | 2006-03-30 | 2006-03-30 | Method for manufacturing martensitic stainless steel pipe |
| JP094737/2006 | 2006-03-30 | ||
| PCT/JP2007/056853 WO2007114246A1 (en) | 2006-03-30 | 2007-03-29 | Method for production of martensitic stainless steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101410535A true CN101410535A (en) | 2009-04-15 |
| CN101410535B CN101410535B (en) | 2010-11-03 |
Family
ID=38563514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800109977A Expired - Fee Related CN101410535B (en) | 2006-03-30 | 2007-03-29 | Method for production of martensitic stainless steel pipe |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2003215B1 (en) |
| JP (1) | JP2007270191A (en) |
| CN (1) | CN101410535B (en) |
| WO (1) | WO2007114246A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2638873C1 (en) * | 2016-12-26 | 2017-12-18 | Федеральное государственное бюджетное учреждение науки Институт металлургии и материаловедения им. А.А. Байкова Российской академии наук (ИМЕТ РАН) | High-strength low-alloy nitrogen-containing martensitic steel |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0645822B2 (en) * | 1990-04-18 | 1994-06-15 | 川崎製鉄株式会社 | Method of manufacturing martensitic stainless steel pipe |
| JPH04107213A (en) * | 1990-08-29 | 1992-04-08 | Nippon Steel Corp | Inline softening treatment for air-hardening seamless steel tube |
| CN1069526A (en) * | 1991-08-12 | 1993-03-03 | 天津市钢管厂 | Hot-boring cold-draw two-phase seamless steel tube |
| US6090230A (en) * | 1996-06-05 | 2000-07-18 | Sumitomo Metal Industries, Ltd. | Method of cooling a steel pipe |
| CA2336600C (en) * | 1999-05-18 | 2004-11-23 | Sumitomo Metal Industries, Ltd. | Martensitic stainless steel for seamless steel pipe |
| JP4380487B2 (en) * | 2004-09-28 | 2009-12-09 | 住友金属工業株式会社 | Method for producing martensitic stainless steel pipe |
| JP4403566B2 (en) * | 2008-03-27 | 2010-01-27 | 住友金属工業株式会社 | Air cooling equipment for heat treatment of martensitic stainless steel pipes |
-
2006
- 2006-03-30 JP JP2006094737A patent/JP2007270191A/en active Pending
-
2007
- 2007-03-29 CN CN2007800109977A patent/CN101410535B/en not_active Expired - Fee Related
- 2007-03-29 EP EP07740291.5A patent/EP2003215B1/en not_active Expired - Fee Related
- 2007-03-29 WO PCT/JP2007/056853 patent/WO2007114246A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| EP2003215A4 (en) | 2013-05-22 |
| WO2007114246A1 (en) | 2007-10-11 |
| JP2007270191A (en) | 2007-10-18 |
| EP2003215A9 (en) | 2009-05-06 |
| EP2003215A2 (en) | 2008-12-17 |
| EP2003215B1 (en) | 2014-08-20 |
| CN101410535B (en) | 2010-11-03 |
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Owner name: NIPPON STEEL + SUMITOMO METAL CORPORATION Free format text: FORMER OWNER: CHUGAI SEIYAKU KABUSHIKI KAISHA Effective date: 20130426 |
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