CN104968808B - The manufacture method and manufacturing equipment of the seamless steel pipe of tenacity excellent - Google Patents
The manufacture method and manufacturing equipment of the seamless steel pipe of tenacity excellent Download PDFInfo
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- CN104968808B CN104968808B CN201480006949.0A CN201480006949A CN104968808B CN 104968808 B CN104968808 B CN 104968808B CN 201480006949 A CN201480006949 A CN 201480006949A CN 104968808 B CN104968808 B CN 104968808B
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- 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
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- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- 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
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
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- 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
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- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- 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
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- 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
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- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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Abstract
In the prior art, it is difficult at the same realize reduce because the tissue on body wall thickness direction it is uneven caused by material deviation and maintain the overall productivity ratio of heat-treatment production line.Differentiate whether body is steel grade of the Ms points less than 200 DEG C in advance, after quenching, the body separately indwelling (be preferably transferred to indwelling bed 6 carry out indwelling) under room temperature environment for differentiating that result is yes, until the temperature difference in the highest temperature portion and lowest temperature portion in the pipe axis vertical take-off section of the body, which turns into, is less than 2.0 DEG C, afterwards, the temper is fed to, on the other hand, the body for differentiating that result is no feeds to the temper without the indwelling.
Description
Technical field
The present invention relates to the excellent seamless steel pipe of toughness (toughness) (seamless steel pipe or tube)
Manufacture method and manufacturing equipment.The manufacture method and manufacturing equipment are especially for as such as stainless steel (stainless
Steel) Ms points (=martensite start temperature (martensitic transformation start like that
)) and Mf points (=martensitic traoformation finishing temperature (martensitic transformation finish temperature
Temperature)) for low temperature steel grade seamless steel pipe manufacture semi-finished product (intermediate products (semimanufactured
Product body)) is implemented to handle (quenching and as the Q-tempering of modifier treatment (thermal refining)
Tempering) used with obtaining the product pipe of tenacity excellent.
" tenacity excellent " said here refers to for example meet iso standard 13680.That is, the wall thickness by product pipe is referred to
The pipe circumferential direction (C directions, transverse test piece) of central part (central part of wall thickness)
Absorption energy (absorbed at test temperature=- 10 DEG C of Charpy-type test (Charpy impact test) measure
Energy) (it is denoted as：vE- 10) meet：In terms of the average value of 3 test films, average absorption energy is more than 40J, and absorbs energy
Measure the experiment slice less than 40J be less than 1 in 3 test films and its to absorb the value of energy be more than 27J (required value 40J
More than 2/3).
Background technology
As the prior art of the manufacture on seamless steel pipe, following technology is enumerated.
Patent Document 1 discloses following technology：When manufacturing the seamless steel pipe of heavy wall 13Cr systems stainless steel, pass through rule
The heating-up temperature and cooling velocity during quenching heat treatment are determined, to obtain the product of high intensity and high tenacity.
Patent Document 2 discloses for making life when the steel grade of the cooling velocity to that can not increase quenching is handled
Production efficiency (productive efficiency) is reduced to minimal equipment.However, the order sheet on heat treatment
Body, it is exactly first to enter-first go out (first in, first out) as long as no failure (trouble).
Patent Document 3 discloses the manufacture method of the seamless steel pipe of martensite-ferrite dual phase steel.
Patent Document 4 discloses following technology：Make quenching liquid (quenching liquid) on pipe inner face side edge
In the process for quenching of one direction circulation, the flow of quenching liquid is controlled based on the liquid temperature measured value of inflow side and outflow side, by
This reduces the hardness deviation on the length direction of the pipe after quenching.
Patent document
Patent document 1:Japanese Unexamined Patent Publication 2008-189945 publications
Patent document 2:Japanese Unexamined Patent Publication 2009-242863 publications
Patent document 3:Japanese Unexamined Patent Publication 2005-336595 publications
Patent document 4:Japanese Unexamined Patent Publication 2001-032022 publications
The content of the invention
The invention problem to be solved
On the body of the manufacture semi-finished product of the seamless steel pipe as steel grades such as martensitic stainless steels, passing through hot-working
After (hot working) tube rolling (tube rolling) is regulation shape (predetermined size), by implementing to quench
The heat treatment of tempering, control as required intensity and toughness levels.Following process is taken in common heat treatment：First, quenching
In fire processing, above-mentioned tubular body is being heated to A in heating furnace (heating furnace)c1Point above Ac3The following temperature of point
Afterwards, rapidly it is cooled to close to room temperature by water cooling etc., in ensuing temper, the body after above-mentioned rapidly cooling is existed
A is heated in other heating furnacesc1Cooling is placed after the following temperature of point (referring for example to patent document 1).Recently, as progress
The equipment of heat treatment is continuously produced line (continuously linable), is each set for various product varietys
Determine the treatment conditions such as heating-up temperature and heat time.
The steel such as martensitic stainless steel (with reference to patent document 1) or martensite-ferrite dual phase steel (with reference to patent document 3)
Kind obtains desired amount (desired area ratio) martensitic phase by above-mentioned Q-tempering.Here, Ms points and Mf point roots
Form and be very different according to the steel for determining steel grade, wherein being less than the steel grade of room temperature less than 100 DEG C, Mf points there is also Ms points.Quench
The temperature of body after fire is generally confirmed by the measurement of surface temperature.On low Ms points as described above and the steel of low Mf points
Kind, the temperature difference (the uneven temperature distribution in=wall thickness direction) inside the surface of body and wall thickness is to martensitic phase variability
The influence of (martensitic transformation ratio) can not be ignored.That is, even if the surface temperature of the body after quenching
Degree is close to room temperature, if in wall thickness direction (wall thickness direction) Temperature Distribution (temperature
Distribution tempering is advanced to before) reaching uniform stable state (steady state), then can produce non-original idea
Tissue distribution, this can turn into produce modifier treatment after material deviation (material variability) (=mechanical performance
The deviation of (mechanical property), especially toughness) a reason.
On the other hand, (for the sake of convenient, claim on wanting to obtain the steel grade of desired martensitic phase by above-mentioned Q-tempering
For specific steel grade (specific steel grade)), even if due to cold after Quench heating (heating in=Quenching Treatment)
But speed can also produce in itself to place low cooling velocity martensitic traoformation as cooling, so if after cooling to room temperature
The sufficient time is placed in continuation at room temperature, then can reduce above-mentioned material deviation.But produced if be heat-treated in identical
First to enter-first go out the heat treatment that (referring for example to patent document 2) implements specific steel grade and different steel grades in addition in line, then
The standing time of specific steel grade at room temperature be present needs more than stipulated time this case to turn into obstacle so that heat treatment life
The problem of overall productivity ratio of producing line reduces.
As a result, in the past, it is known that the length direction of body is reduced by the flow control (flow control) of quenching liquid
On hardness deviation process for quenching and equipment (referring for example to patent document 4).But as described above by specific steel grade and
Problems be present in the heat treatment that different steel grades are carried out by identical heat-treatment production line：I.e., it is difficult to while realize drop
Caused by uneven (the non-uniform microstructure) of the low tissue because on the body wall thickness direction of specific steel grade
Material deviation and the productivity ratio for maintaining heat-treatment production line entirety.
Means for solving the problems
Present inventor is studied with keen determination in order to solve above-mentioned problem, and its result is found, if differentiating body
It is steel grade of the Ms points less than 200 DEG C or steel grade in addition, and separately in room temperature ring after the former water cooling in quenching
Indwelling under border is until the temperature difference in the highest temperature portion in (wall thickness direction) and lowest temperature portion turns into low in tube axis direction orthogonal cross-sections
In 2.0 DEG C, then above-mentioned material deviation significantly reduces, and the average value (vE of the data in the deviation range of above-mentioned material- 10's
Average value) also improve.It should be noted that as long as the latter carries out common Q-tempering.The present invention is seen based on these
Solve and complete, its purport is as described below.
(1) a kind of manufacture method of seamless steel pipe, have and the body of the manufacture semi-finished product as seamless steel pipe is implemented to quench
The process of fiery temper, the manufacture method of the seamless steel pipe are characterised by, differentiate whether body is that Ms points are less than in advance
200 DEG C of steel grade, after the quenching, the body separately indwelling under room temperature environment for differentiating result and being yes, until the pipe
The temperature difference in highest temperature portion and lowest temperature portion in the pipe axis vertical take-off section of body, which turns into, is less than 2.0 DEG C, afterwards, is fed to institute
Temper is stated, on the other hand, the body for differentiating that result is no feeds to the temper without the indwelling.
(2) a kind of manufacturing equipment of seamless steel pipe, including the body of the manufacture semi-finished product as seamless steel pipe is implemented to quench
The equipment of fiery temper, the manufacturing equipment of the seamless steel pipe are characterised by possessing：Mechanism for identifying, it differentiates pipe in advance
Whether body is steel grade of the Ms points less than 200 DEG C；And indwelling bed, it is used for before the tempering is fed to, and the body is another
Row indwelling under room temperature environment, until the difference in the highest temperature portion and lowest temperature portion in the pipe axis vertical take-off section of the body turns into low
In 2.0 DEG C.
Invention effect
According to the present invention, Ms points be tempered after quenching less than 200 DEG C of steel grade before separately under room temperature environment indwelling until
Wall thickness direction Temperature Distribution full and uniformization is so as to the product pipe as the small tenacity excellent of material deviation, steel grade in addition
Not by above-mentioned indwelling hinder ground as usual with first enter-first go out to be heat-treated, therefore, it is possible to maintain heat-treatment production line
The seamless steel pipe of tenacity excellent is manufactured while the productivity ratio of entirety.
Brief description of the drawings
Fig. 1 is the floor map of one for representing the heat-treatment production line used in the present invention.
Embodiment
Fig. 1 is the floor map of one for representing the heat-treatment production line used in the present invention.As seamless steel
In the body 1 of pipe manufacture semi-finished product, it is determined as Ms points and adds for more than 200 DEG C of body (for the sake of convenient, also referred to as A pipes) in quenching
It is heated in hot stove 2 according to steel grade and after different appropriate heating-up temperatures, is impregnated in quenching tank (quenching
Water tank) in cooling water in 3 and water cooling until the outer peripheral face temperature of body is reduced to close to room temperature.Afterwards, via cold
But on bed (cooling bed) 4, with according to steel grade in tempering heating furnace (heating furnace for tempering) 5
And different appropriate temperatures is tempered.It should be noted that Ms points are asked by using the calculating of aftermentioned formula (1)
Go out.
On the other hand, body (convenient for the sake of, also referred to as B pipe) of the Ms points less than 200 DEG C is determined as until reaching cooling
To be processed with A pipe identicals path untill bed 4.But only using B pipes from cooling bed 4 to being used as its different from the path of A pipes
The transfer of indwelling bed (also referred to as alignment buffer (buffer line)) 6 in his path, and stayed on the alignment buffer 6 under room temperature environment
Put and be less than 2.0 DEG C until the temperature difference (being denoted as Δ T) in the highest temperature portion in tube axis direction orthogonal cross-sections and lowest temperature portion turns into.
Cooling bed 4 are returned it to afterwards, are tempered later using with A pipe identicals path.
It should be noted that in the present invention, make cooling bed 4 and indwelling bed 6 be equipment independently.It is if cooling bed
4 space has and vacant can also then used one part as indwelling bed.
In the present invention, foregoing specific steel grade (wanting to obtain the steel grade of the martensitic phase of desired amount by Q-tempering)
For example, consisting of：In terms of quality %, contain C：0.005~0.05%, Si：0.05~1.0%, Mn：0.2~1.8%, P：
Less than 0.03%, S：Less than 0.005%, Cr：11~20%, Ni：1.5~10%, Mo：1~5%, N：Less than 0.15%, and it is surplus
Remaining part is divided into Fe and inevitable impurity.In addition it is also possible to it is consisting of：In above-mentioned composition, instead of a Fe part
And contained in terms of quality % from Al：0.002~0.05%, Cu：Less than 3.5%, Nb：Less than 0.5%, V：Less than 0.5%, Ti：
Less than 0.3%, Zr：Less than 0.2%, W：Less than 3%, B：Less than 0.01%, Ca：Less than 0.01%, REM：In less than 0.01%
Selection 1 in or two or more.
As it was previously stated, it is less than in Mf points in steel grade as room temperature (it is one kind in above-mentioned specific steel grade), substantially
The wall is determined by the Temperature Distribution (Temperature Distribution in pipe axis vertical take-off section) in the wall thickness direction of body during tempering beginning
The martensitic phase variability of the position in thick direction, in other words remained austenite content (amount of residual
austenite).In such Temperature Distribution, even if the highest temperature portion of the Temperature Distribution in the wall thickness direction of body and lowest temperature
The temperature difference Δ T in portion be less than 10 DEG C, the difference (deviation) of remained austenite content caused by the wall thickness direction position of body also into
For the degree that can not ignore.The deviation of the remained austenite content turns into a reason of the material deviation for producing product.
On the other hand, in the present invention, by B pipes, indwelling is less than 2.0 DEG C until Δ T turns under room temperature environment.Thus, energy
Access following effect：The deviation of the remained austenite content in body wall thickness direction when tempering starts significantly reduces, after tempering
The material deviation of product significantly reduces, and the average value (vE of the data in the material deviation range- 10Average value) improve.
If starting to be tempered before Δ T decreases below 2.0 DEG C, such effect can not be obtained.In addition, the differentiation bar by B pipes
It is the experimental studies results based on following present inventor that part, which is set to Ms points less than 200 DEG C,：Even if the criterion is considered as
It is substantially of equal value less than room temperature with Mf points, also had no problem in practical application.
In the present embodiment, Ms points are calculated using following formula (1), and the formula (1) obtains as follows, i.e. from above-mentioned
The company of specific steel grade and the thermal expansion test piece (thermal expansion test piece) by using various compositions
The thermal expansion of continuous cooling phase-change experiment (continuous cooling transformation experiment) measured in advance
The experimental data of Ms points is gathered on curve (thermal expansion curve), to this in terms of constituent amount [quality %]
Experimental data carries out regression analysis (regression analysis), thus obtains formula (1).
[the % of Ms [DEG C]=502-810 [%C] -1230 [%N] -13 [%Mn] -30 [%Ni] -12 [%Cr] -54
Cu] -6 [%Mo] ... (1)
It should be noted that in formula (1), [%M] is each component element M component amount.In addition, be free of in it steel be present
In the case of some component elements its component element item is brought into by 0.
As being specifically preferable to carry out means, to enter each steel grade setting of heat treatment from quenching terminate (water cooling terminates) to
Tempering start untill standby need the time (waiting time) (time (lead time)).When carrying out the setting,
Preferably, the Ms points based on above-mentioned formula (1) are grasped in advance, and prepare environment temperature (ambient temperature) and
The time calculation means (calculation device) that the measurement of the surface temperature of body is combined with Calculation of Heat Transfer.In Ms
In the body (above-mentioned B pipes) of steel grade of the point less than 200 DEG C, first enter-first go out time of the mode on cooling bed 4 by common
The body the time required to the equalizing temperature untill being changed into 2.0 DEG C of Δ T ＜ is not reached, alignment buffer 6 is temporarily diverted to, in room
Indwelling is carried out under warm environment after being changed into Δ T ＜ 2.0, feeds to temper again.
Embodiment
By hot-working to the steel billet of the Ms points calculated with the chemical composition shown in table 1 and by formula (1)
(steel billet) carries out tubulation, and 100 DEG C~room temperature is air-cooled to after the tubulation, external diameter 195.0mm × wall thickness is made
10 bodys of the 27.0mm raw material as seamless steel pipe.
As example of the present invention, 5 (P1~P5) of the random extraction (random sampling) in above-mentioned tubular body are carried out
Following heat treatment (quenching-tempering).Heat-treatment production line uses the production line shown in Fig. 1.Quench as after being heated to 950 DEG C
Carry out the processing of water cooling.After water cooling the surface temperature (measured value) of the body of re-heat (recuperation) finish time be 30~
36℃.By body indwelling more than 8 hours (in air) at room temperature, at the time of Δ T (calculated value) turns into 1.2~1.8 DEG C
It is loaded into tempering heating furnace and is tempered at 600 DEG C.
As comparative example, for remaining 5 bodys (P6~P10), carrying out with example of the present invention under the same conditions
After quenching, without the time management (time management) based on 2.0 DEG C of Δ T ＜, but according to it is common first enter-first
Go out mode and load tempering heating furnace, and be tempered at 600 DEG C.In this case, (counted to Δ T during tempering heating furnace loading
Calculation value) it is 6.0 DEG C.
From each body after temper, according to JIS Z 2202 regulation to the respectively 3 V-notch examinations of collection of each body
Test piece (the wall thickness central portion of collection position=pipe, test film thickness=10mm, test film length direction=pipe circumferential direction (C side
To), V-notch depth direction=pipe range direction (L directions)) (S1, S2, S3), carry out Charpy according to JIS Z 2242 regulation
Impact test simultaneously obtains vE- 10。
Obtained result is as shown in table 2.According to table 2, in example of the present invention, vE- 10The average value of value (N number=15)=
87.7J, without the test film less than 40J.In addition, the result that this deviation of acquisition standard deviation=3.8J is very small.The opposing party
Face, in a comparative example, vE- 10It is worth the average value=81.7J of (N number=15).But the test film less than 40J has 2.In addition,
In a comparative example, standard deviation=17.9J and average value reduction and the expansion of deviation are confirmed.Seen by every body
Result is examined, in a comparative example, there is to have obtained the vE with degree with example of the present invention- 10The body of value.On the other hand, confirm
vE- 10The body that value is greatly reduced, this can cause the reduction of average value and the expansion of deviation.
So, the mechanical performance that can be stablized according to the present invention.
[table 1]
[table 2]
Description of reference numerals
1 body
2 quenching heating furnaces
3 quenching tanks
4 is cooling bed
5 tempering heating furnaces
6 indwelling beds (alignment buffer)
Claims (2)
1. a kind of manufacture method of seamless steel pipe, have and Q-tempering is implemented to the body of the manufacture semi-finished product as seamless steel pipe
The process of processing, wherein, the Q-tempering processing is carried out by identical heat-treatment production line to multiple steel grades, described seamless
The manufacture method of steel pipe is characterised by,
The steel grade has consisting of：In terms of quality %, contain C：0.005~0.05%, Si：0.05~1.0%, Mn：0.2
~1.8%, P：Less than 0.03%, S：Less than 0.005%, Cr：11~20%, Ni：1.5~10%, Mo：1~5%, N：
Less than 0.15%, and optionally contain from Al：0.002~0.05%, Cu：Less than 3.5%, Nb：Less than 0.5%, V：
Less than 0.5%, Ti：Less than 0.3%, Zr：Less than 0.2%, W：Less than 3%, B：Less than 0.01%, Ca：Less than 0.01%, REM：
Less than 0.01% middle selection it is one kind or two or more, remainder is Fe and inevitable impurity,
It is steel grade of the Ms points less than 200 DEG C or the steel grade in addition shown in following formula (1) to differentiate body in advance, described
It is the body of steel grade of the Ms points less than 200 DEG C for the differentiation result after quenching, is to as with the differentiation result using it
Ms points are the indwelling bed transfer in other different paths of the path of the body of more than 200 DEG C of steel grade, separately under room temperature environment
Indwelling, until the temperature difference in the highest temperature portion and lowest temperature portion in the pipe axis vertical take-off section of the body, which turns into, is less than 2.0 DEG C, it
Afterwards, fed to the temper, on the other hand, it is described differentiate result be Ms points be more than 200 DEG C steel grade body not
Carry out the indwelling and feed to the temper,
[the % of Ms [DEG C]=502-810 [%C] -1230 [%N] -13 [%Mn] -30 [%Ni] -12 [%Cr] -54
Cu] -6 [%Mo] ... (1)
It should be noted that in formula (1), [%M] is each component element M component amount in terms of quality %, in it steel be present
In the case of the component element not contained its component element item is brought into by 0.
2. a kind of manufacturing equipment of seamless steel pipe, including Q-tempering is implemented to the body of the manufacture semi-finished product as seamless steel pipe
The equipment of processing, the manufacturing equipment of the seamless steel pipe be characterised by,
The steel grade of the body has consisting of：In terms of quality %, contain C：0.005~0.05%, Si：0.05~1.0%,
Mn：0.2~1.8%, P：Less than 0.03%, S：Less than 0.005%, Cr：11~20%, Ni：1.5~10%, Mo：1~5%,
N：Less than 0.15%, and optionally contain from Al：0.002~0.05%, Cu：Less than 3.5%, Nb：Less than 0.5%, V：
Less than 0.5%, Ti：Less than 0.3%, Zr：Less than 0.2%, W：Less than 3%, B：Less than 0.01%, Ca：Less than 0.01%, REM：
Less than 0.01% middle selection it is one kind or two or more, remainder is Fe and inevitable impurity,
The manufacturing equipment of the seamless steel pipe possesses：Mechanism for identifying, it differentiates that body is that Ms points shown in following formula (1) are low in advance
In the steel grade of 200 DEG C of steel grades still in addition；And
Indwelling bed, it is located at from the differentiation result different other in path for the body for being the steel grade that Ms points are more than 200 DEG C
Path, for before the tempering is fed to, will only differentiate that result is that Ms points are less than 200 DEG C described in the body after the quenching
Steel grade the body separately indwelling under room temperature environment, until the body pipe axis vertical take-off section in highest temperature portion with
The difference in lowest temperature portion, which turns into, is less than 2.0 DEG C,
[the % of Ms [DEG C]=502-810 [%C] -1230 [%N] -13 [%Mn] -30 [%Ni] -12 [%Cr] -54
Cu] -6 [%Mo] ... (1)
It should be noted that in formula (1), [%M] is each component element M component amount in terms of quality %, in it steel be present
In the case of the component element not contained its component element item is brought into by 0.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013016459A JP5907083B2 (en) | 2013-01-31 | 2013-01-31 | Manufacturing method and equipment for seamless steel pipe with excellent toughness |
| JP2013-016459 | 2013-01-31 | ||
| PCT/JP2014/000297 WO2014119251A1 (en) | 2013-01-31 | 2014-01-22 | Manufacturing method and manufacturing equipment for seamless steel pipe or tube with excellent toughness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104968808A CN104968808A (en) | 2015-10-07 |
| CN104968808B true CN104968808B (en) | 2017-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480006949.0A Active CN104968808B (en) | 2013-01-31 | 2014-01-22 | The manufacture method and manufacturing equipment of the seamless steel pipe of tenacity excellent |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20150368734A1 (en) |
| EP (1) | EP2952592B1 (en) |
| JP (1) | JP5907083B2 (en) |
| CN (1) | CN104968808B (en) |
| WO (1) | WO2014119251A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016113794A1 (en) | 2015-01-15 | 2016-07-21 | Ｊｆｅスチール株式会社 | Seamless stainless steel pipe for oil well, and method for manufacturing same |
| EP3404120B1 (en) | 2016-01-13 | 2020-03-04 | Nippon Steel Corporation | Method for manufacturing stainless steel pipe for oil wells and stainless steel pipe for oil wells |
| CN110484814B (en) * | 2019-08-05 | 2021-05-18 | 中国科学院金属研究所 | High-strength steel seamless tube containing rare earth for aerospace and preparation method thereof |
| CN111304429B (en) * | 2020-04-01 | 2021-08-27 | 益大特钢有限公司 | Heat treatment equipment for processing seamless steel pipe |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5739129A (en) * | 1980-08-15 | 1982-03-04 | Nippon Kokan Kk <Nkk> | Heat-treatment for seamless steel pipe |
| JPS611922Y2 (en) * | 1980-10-14 | 1986-01-22 | ||
| JPS6254021A (en) * | 1985-05-23 | 1987-03-09 | Kawasaki Steel Corp | Manufacture of high strength seamless steel pipe superior in sulfide stress corrosion cracking resistance |
| MX9702792A (en) * | 1994-10-20 | 1998-02-28 | Sumitomo Metal Ind | Method of manufacturing seamless steel pipes and manufacturing equipment therefor. |
| JP3694967B2 (en) * | 1996-04-19 | 2005-09-14 | 住友金属工業株式会社 | Method for producing martensitic stainless steel seamless steel pipe |
| JP2001032022A (en) | 1999-07-22 | 2001-02-06 | Sumitomo Metal Ind Ltd | Method for quenching steel pipe and quenching apparatus |
| JP3900801B2 (en) * | 2000-07-21 | 2007-04-04 | 住友金属工業株式会社 | Heat treatment equipment for seamless steel pipes |
| JP2002038219A (en) * | 2000-07-25 | 2002-02-06 | Sumitomo Metal Ind Ltd | Method for producing martensitic stainless steel tube |
| JP5109222B2 (en) | 2003-08-19 | 2012-12-26 | Ｊｆｅスチール株式会社 | High strength stainless steel seamless steel pipe for oil well with excellent corrosion resistance and method for producing the same |
| 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 |
| JP4792778B2 (en) * | 2005-03-29 | 2011-10-12 | 住友金属工業株式会社 | Manufacturing method of thick-walled seamless steel pipe for line pipe |
| JP4940970B2 (en) | 2007-01-31 | 2012-05-30 | Ｊｆｅスチール株式会社 | Manufacturing method for thick 13Cr stainless steel pipe |
| JP5233366B2 (en) | 2008-03-31 | 2013-07-10 | Ｊｆｅスチール株式会社 | Steel pipe quenching equipment |
| US20110132501A1 (en) * | 2008-09-04 | 2011-06-09 | Jfe Steel Corporation | Martensitic stainless steel seamless tube for oil country tubular goods and manufacturing method thereof |
| AR075976A1 (en) * | 2009-03-30 | 2011-05-11 | Sumitomo Metal Ind | METHOD FOR THE MANUFACTURE OF PIPE WITHOUT SEWING |
| JP5487689B2 (en) * | 2009-04-06 | 2014-05-07 | Ｊｆｅスチール株式会社 | Manufacturing method of martensitic stainless steel seamless pipe for oil well pipe |
| EP2687612B1 (en) * | 2011-03-18 | 2018-09-26 | Nippon Steel & Sumitomo Metal Corporation | Steel pipe quenching method |
-
2013
- 2013-01-31 JP JP2013016459A patent/JP5907083B2/en active Active
-
2014
- 2014-01-22 EP EP14746700.5A patent/EP2952592B1/en active Active
- 2014-01-22 WO PCT/JP2014/000297 patent/WO2014119251A1/en active Application Filing
- 2014-01-22 US US14/764,813 patent/US20150368734A1/en not_active Abandoned
- 2014-01-22 CN CN201480006949.0A patent/CN104968808B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US20150368734A1 (en) | 2015-12-24 |
| JP5907083B2 (en) | 2016-04-20 |
| EP2952592B1 (en) | 2019-06-12 |
| JP2014148699A (en) | 2014-08-21 |
| CN104968808A (en) | 2015-10-07 |
| EP2952592A1 (en) | 2015-12-09 |
| EP2952592A4 (en) | 2016-04-27 |
| WO2014119251A1 (en) | 2014-08-07 |
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