CN107236856B - A kind of seamless steel pipe heat treatment process - Google Patents
A kind of seamless steel pipe heat treatment process Download PDFInfo
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- CN107236856B CN107236856B CN201710508355.5A CN201710508355A CN107236856B CN 107236856 B CN107236856 B CN 107236856B CN 201710508355 A CN201710508355 A CN 201710508355A CN 107236856 B CN107236856 B CN 107236856B
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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
-
- 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
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
-
- 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
- C21D1/26—Methods of annealing
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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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)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of seamless steel pipe heat treatment process, comprising the following steps: 1) anneals: the seamless steel pipe of semi-finished product being delivered in Muffle furnace and is made annealing treatment；2) it quenches: the seamless steel pipe after annealing being delivered in glowing furnace and is quenched, be divided into one section of heating, heating two sections and soaking zone；3) quenching liquid pours leaching: going out glowing furnace after quenching and immerses the quenching liquid that temperature is 15-25 DEG C, cool time 45-55s；4) it is tempered: finally seamless steel pipe being transported in tempering furnace and carries out tempering, comes out of the stove after tempering and is air-cooled to room temperature.This kind of heat treatment process can enhance the stability of seamless steel pipe performance, while avoid phenomena such as seamless steel pipe can not align correction because of the bending of heat treatment generation, mechanical heterogeneity.
Description
Technical field
The present invention relates to seamless steel pipe manufacturing fields, and in particular to a kind of seamless steel pipe heat treatment process.
Background technique
Seamless steel pipe heat treatment process is that seamless steel pipe workpiece is heated to certain temperature heat preservation a period of time, then makes it
Slowly cool down.Seamless steel pipe heat treatment is to be heated to steel pipe to undergo phase transition or the temperature of partial phase change, via after heat preservation slowly
Cooling heat treatment method.The purpose of heat treatment is to reduce hardness, improve plasticity, improvement processing performance；Elimination internal stress,
Stablize steel pipe sizes, place deformation and cracking；The mechanical property for refining crystal grain, improving tissue, improving seamless steel pipe.
Seamless steel pipe, after normally keeping the temperature, closes heat-treatment furnace as long as passing through when being heat-treated at present
Burner, no longer heat supply are heated, Steel Pipe Heat carries out complete or isothermal annealing with the free temperature drop of heat-treatment furnace.In the process, temperature drop
Process is uncontrollable process.
Since the universal length of seamless steel pipe is longer, about 4~12m；Therefore, it is poor will to have severe temperature for entire seamless steel pipe
Different, thus bring consequence is as follows:
(1) seamless steel pipe bent because of the stress that the temperature difference generates；
(2) the mechanical property difference of homogeneous tube is larger.
Due to the steel pipe time long enough of the heat treatment process generally used, so while entire seamless steel pipe mechanical property
It differs greatly, but can meet user's requirement, therefore not by enough attention.Raising with user to product requirement, such presence
The steel pipe of both ends difference has been difficult to meet the requirement of user.And the side of aligning can be used in the bending that the stress that the temperature difference generates causes
Formula carries out, and still, pipe end, which can not be aligned, does not have suitable straightener with part seamless steel pipe, and product lumber recovery is caused to decline
Even it can't be finished product because being unable to complete aligning.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of seamless steel pipe heat treatment process, at this kind heat
Science and engineering artistic skill enhances the stability of seamless steel pipe performance, while avoiding bending, mechanical property that seamless steel pipe is generated by heat treatment
Phenomena such as energy unevenly can not align correction.
In order to achieve the above object, the present invention is achieved through the following technical solutions:
A kind of seamless steel pipe heat treatment process, comprising the following steps:
(1) it anneals: the seamless steel pipe of semi-finished product being delivered in Muffle furnace and is made annealing treatment, annealing temperature 520-
560 DEG C, annealing soaking time is 40-60min；
(2) it quenches: the seamless steel pipe after annealing being delivered in glowing furnace and is quenched, be divided into one section of heating, add
Hot two sections and soaking zone；
The temperature of one section of heating is 780-820 DEG C, retention time 20-30min；
The temperature of two sections of heating is 840-880 DEG C, retention time 30-40min；
The temperature of soaking zone is 790-830 DEG C, retention time 25-35min；
(3) quenching liquid pours leaching: going out glowing furnace after quenching to immerse temperature is 15-25 DEG C of quenching liquid, and the cool time is
45-55s；
(4) it is tempered: finally seamless steel pipe being transported in tempering furnace and carries out tempering, is that first seamless steel pipe heats up
To 580-620 DEG C, 30-40min is kept the temperature, is cooled to 360-420 DEG C later, 20-30min is kept the temperature, comes out of the stove after tempering air-cooled
To room temperature.
Further, in above-mentioned steps (1), before annealing, first annealing furnace is preheated, preheating temperature is
480-520℃。
Further, in above-mentioned steps (3), quenching liquid is using isothermal quenching oil.
Further, above-mentioned seamless steel pipe includes following chemical component by weight percentage: C 0.21~0.45%, Si
0.16~0.32%, Mn 0.48~0.72%, Ni 0.37~0.53%, S 0.01~0.03%, P 0.01~0.03%, it is remaining
Amount is Fe and inevitable impurity.
Preferably, above-mentioned seamless steel pipe includes following chemical component by weight percentage: C 0.43%, Si 0.24%,
Mn 0.60%, Ni 0.60%, S 0.02%, P 0.02%, surplus are Fe and inevitable impurity.
The present invention have it is following the utility model has the advantages that
(1) it this invention removes difference existing for the performance of seamless steel pipe both ends is caused because of ordinary heat treatment, enhances
The stability of entire seamless steel pipe performance, while also avoiding bending, mechanical property unevenness that seamless steel pipe is generated by heat treatment
It is even and the phenomenon that correction can not be aligned；
(2) above-mentioned seamless steel pipe and its heat treatment process are used, finished product seamless steel pipe internal structure crystal grain can be made equal
Even, face crack is small, and various crystal are reasonably distributed, and overall performance is good, and the final steel pipe performance inconsistency range after heat treatment is small,
Compared with common tempering heat treatment, this kind of seamless steel pipe performance indicator concentration degree is high, and performance is stablized, the heat-treatability of same grade of steel
Can: this kind of seamless steel pipe yield strength fluctuation range can≤60MPa, steel tube performance qualification rate is up to 99% or more.
Specific embodiment
Below with reference to embodiment, further description of the specific embodiments of the present invention, and following embodiment is only used for more
Technical solution of the present invention is clearly demonstrated, and not intended to limit the protection scope of the present invention.
Embodiment 1
A kind of seamless steel pipe heat treatment process, follows the steps below:
(1) it anneals: first the semi-finished product seamless steel pipe after casting mold being delivered in Muffle furnace and is made annealing treatment, at annealing
Before reason, first annealing furnace is preheated, preheating temperature is set as 480 DEG C, and annealing temperature is controlled at 520 DEG C, soaking time of annealing
It is set as 40min；
Above-mentioned seamless steel pipe includes following chemical component by weight percentage: C 0.21%, Si 0.16%, Mn
0.48%, Ni 0.37%, S 0.01%, P 0.01%, surplus are Fe and inevitable impurity, wherein inevitably miscellaneous
The content of matter is controlled≤0.05%；
(2) it quenches: the seamless steel pipe after annealing being delivered in glowing furnace be quenched again, be divided into following three ranks
Section:
The temperature of one section of heating is 780 DEG C, retention time 20min；
The temperature of two sections of heating is 840 DEG C, retention time 30min；
The temperature of soaking zone is 790 DEG C, retention time 25min；
(3) quenching liquid pours leaching: go out glowing furnace after quenching and immerses in the isothermal quenching oil that temperature is 15 DEG C, quenching
Time is set as 45s；
(4) it is tempered: finally seamless steel pipe being transported in tempering furnace and carries out tempering, specifically first by seamless steel pipe liter
Temperature keeps the temperature 30min, is cooled to 360 DEG C later to 580 DEG C, keeps the temperature 20min, and coming out of the stove after tempering is air-cooled to room temperature and completes
Seamless steel pipe heat treatment process of the invention.
Embodiment 2
A kind of seamless steel pipe heat treatment process, follows the steps below:
(1) it anneals: first the semi-finished product seamless steel pipe after casting mold being delivered in Muffle furnace and is made annealing treatment, at annealing
Before reason, first annealing furnace is preheated, preheating temperature is set as 490 DEG C, and annealing temperature is controlled at 530 DEG C, soaking time of annealing
It is set as 45min；
Above-mentioned seamless steel pipe includes following chemical component by weight percentage: C 0.25%, Si 0.20%, Mn
0.52%, Ni 0.42%, S 0.015%, P 0.015%, surplus are Fe and inevitable impurity, wherein inevitably
The content of impurity is controlled≤0.05%；
(2) it quenches: the seamless steel pipe after annealing being delivered in glowing furnace be quenched again, be divided into following three ranks
Section:
The temperature of one section of heating is 7890 DEG C, retention time 22min；
The temperature of two sections of heating is 850 DEG C, retention time 32min；
The temperature of soaking zone is 800 DEG C, retention time 28min；
(3) quenching liquid pours leaching: go out glowing furnace after quenching and immerses in the isothermal quenching oil that temperature is 18 DEG C, quenching
Time is set as 48s；
(4) it is tempered: finally seamless steel pipe being transported in tempering furnace and carries out tempering, specifically first by seamless steel pipe liter
Temperature keeps the temperature 32min, is cooled to 370 DEG C later to 590 DEG C, keeps the temperature 22min, and coming out of the stove after tempering is air-cooled to room temperature and completes
Seamless steel pipe heat treatment process of the invention.
Embodiment 3
A kind of seamless steel pipe heat treatment process, follows the steps below:
(1) it anneals: first the semi-finished product seamless steel pipe after casting mold being delivered in Muffle furnace and is made annealing treatment, at annealing
Before reason, first annealing furnace is preheated, preheating temperature is set as 500 DEG C, and annealing temperature is controlled at 540 DEG C, soaking time of annealing
It is set as 50min；
Above-mentioned seamless steel pipe includes following chemical component by weight percentage: C 0.43%, Si 0.24%, Mn
0.60%, Ni 0.60%, S 0.02%, P 0.02%, surplus are Fe and inevitable impurity, wherein inevitably miscellaneous
The content of matter is controlled≤0.05%；
(2) it quenches: the seamless steel pipe after annealing being delivered in glowing furnace be quenched again, be divided into following three ranks
Section:
The temperature of one section of heating is 80 DEG C, retention time 25min；
The temperature of two sections of heating is 860 DEG C, retention time 35min；
The temperature of soaking zone is 810 DEG C, retention time 30min；
(3) quenching liquid pours leaching: go out glowing furnace after quenching and immerses in the isothermal quenching oil that temperature is 20 DEG C, quenching
Time is set as 50s；
(4) it is tempered: finally seamless steel pipe being transported in tempering furnace and carries out tempering, specifically first by seamless steel pipe liter
Temperature keeps the temperature 35min, is cooled to 390 DEG C later to 600 DEG C, keeps the temperature 25min, and coming out of the stove after tempering is air-cooled to room temperature and completes
Seamless steel pipe heat treatment process of the invention.
Embodiment 4
A kind of seamless steel pipe heat treatment process, follows the steps below:
(1) it anneals: first the semi-finished product seamless steel pipe after casting mold being delivered in Muffle furnace and is made annealing treatment, at annealing
Before reason, first annealing furnace is preheated, preheating temperature is set as 510 DEG C, and annealing temperature is controlled at 550 DEG C, soaking time of annealing
It is set as 55min；
Above-mentioned seamless steel pipe includes following chemical component by weight percentage: C 0.40%, Si 0.28%, Mn
0.68%, Ni 0.47%, S 0.025%, P 0.025%, surplus are Fe and inevitable impurity, wherein inevitably
The content of impurity is controlled≤0.05%；
(2) it quenches: the seamless steel pipe after annealing being delivered in glowing furnace be quenched again, be divided into following three ranks
Section:
The temperature of one section of heating is 810 DEG C, retention time 28min；
The temperature of two sections of heating is 870 DEG C, retention time 38min；
The temperature of soaking zone is 820 DEG C, retention time 32min；
(3) quenching liquid pours leaching: go out glowing furnace after quenching and immerses in the isothermal quenching oil that temperature is 22 DEG C, quenching
Time is set as 52s；
(4) it is tempered: finally seamless steel pipe being transported in tempering furnace and carries out tempering, specifically first by seamless steel pipe liter
Temperature keeps the temperature 38min, is cooled to 410 DEG C later to 610 DEG C, keeps the temperature 28min, and coming out of the stove after tempering is air-cooled to room temperature and completes
Seamless steel pipe heat treatment process of the invention.
Embodiment 5
A kind of seamless steel pipe heat treatment process, follows the steps below:
(1) it anneals: first the semi-finished product seamless steel pipe after casting mold being delivered in Muffle furnace and is made annealing treatment, at annealing
Before reason, first annealing furnace is preheated, preheating temperature is set as 520 DEG C, and annealing temperature is controlled at 560 DEG C, soaking time of annealing
It is set as 60min；
Above-mentioned seamless steel pipe includes following chemical component by weight percentage: C 0.45%, Si 0.32%, Mn
0.72%, Ni 0.53%, S 0.03%, P 0.03%, surplus are Fe and inevitable impurity, wherein inevitably miscellaneous
The content of matter is controlled≤0.05%；
(2) it quenches: the seamless steel pipe after annealing being delivered in glowing furnace be quenched again, be divided into following three ranks
Section:
The temperature of one section of heating is 820 DEG C, retention time 30min；
The temperature of two sections of heating is 880 DEG C, retention time 40min；
The temperature of soaking zone is 830 DEG C, retention time 35min；
(3) quenching liquid pours leaching: go out glowing furnace after quenching and immerses in the isothermal quenching oil that temperature is 25 DEG C, quenching
Time is set as 55s；
(4) it is tempered: finally seamless steel pipe being transported in tempering furnace and carries out tempering, specifically first by seamless steel pipe liter
Temperature keeps the temperature 40min, is cooled to 420 DEG C later to 620 DEG C, keeps the temperature 30min, and coming out of the stove after tempering is air-cooled to room temperature and completes
Seamless steel pipe heat treatment process of the invention.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although referring to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features.It is all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of seamless steel pipe heat treatment process, which comprises the following steps:
(1) it anneals: the seamless steel pipe of semi-finished product being delivered in Muffle furnace and is made annealing treatment, annealing temperature is 520-560 DEG C,
Annealing soaking time is 40-60min；
(2) it quenches: the seamless steel pipe after annealing being delivered in glowing furnace and is quenched, be divided into one section of heating, heating two
Section and soaking zone；
The temperature of one section of heating is 780-820 DEG C, retention time 20-30min；
The temperature of two sections of heating is 840-880 DEG C, retention time 30-40min；
The temperature of soaking zone is 790-830 DEG C, retention time 25-35min；
(3) quenching liquid pours leaching: going out glowing furnace after quenching and immerses the quenching liquid that temperature is 15-25 DEG C, cool time 45-
55s；
(4) it is tempered: finally seamless steel pipe being transported in tempering furnace and carries out tempering, is first to be warming up to seamless steel pipe
580-620 DEG C, 30-40min is kept the temperature, is cooled to 360-420 DEG C later, 20-30min is kept the temperature, comes out of the stove and be air-cooled to after tempering
Room temperature.
2. a kind of seamless steel pipe heat treatment process according to claim 1, which is characterized in that in step (1), annealing
Before processing, first annealing furnace is preheated, preheating temperature is 480-520 DEG C.
3. a kind of seamless steel pipe heat treatment process according to claim 1, which is characterized in that described to quench in step (3)
Fiery liquid is using isothermal quenching oil.
4. a kind of seamless steel pipe heat treatment process according to any one of claim 1-3, which is characterized in that described seamless
Steel pipe includes following chemical component by weight percentage: C 0.21~0.45%, Si 0.16~0.32%, Mn 0.48~
0.72%, Ni 0.37~0.53%, S 0.01~0.03%, P 0.01~0.03%, surplus be Fe and inevitably it is miscellaneous
Matter.
5. a kind of seamless steel pipe heat treatment process according to claim 1, which is characterized in that the seamless steel pipe is by weight
Measuring percentages includes following chemical component: C 0.43%, Si 0.24%, Mn 0.60%, Ni 0.60%, S 0.02%, P
0.02%, surplus is Fe and inevitable impurity.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107779583A (en) * | 2017-12-15 | 2018-03-09 | 江苏建中新材料科技有限公司 | Seamless steel pipe Technology for Heating Processing |
| CN108286016A (en) * | 2018-01-23 | 2018-07-17 | 合肥康之恒机械科技有限公司 | A kind of mining drilling rod forged steel and preparation method thereof |
| CN108277451A (en) * | 2018-01-23 | 2018-07-13 | 合肥康之恒机械科技有限公司 | A kind of GCr15 profile shafts hold Heat-Treatment of Steel technique |
| CN110777248A (en) * | 2019-11-25 | 2020-02-11 | 华迪钢业集团有限公司 | Heat treatment process of seamless steel pipe |
| CN112226584A (en) * | 2020-05-20 | 2021-01-15 | 常熟市创福管业有限公司 | Heat treatment method of steel pipe |
| CN114807526B (en) * | 2022-04-13 | 2023-09-05 | 大冶特殊钢有限公司 | Heat treatment method for large-size 45CrNiMoV medium-thick-wall seamless steel tube |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608282A (en) * | 2009-07-03 | 2009-12-23 | 天津钢管集团股份有限公司 | Anti--40 ℃～-60 ℃ low temperature drill rod material steel pipes and manufacture method thereof |
| CN103266217A (en) * | 2013-05-10 | 2013-08-28 | 中国石油天然气集团公司 | Hardening and tempering heat treatment process for pipe end of petroleum steel pipe |
| CN103725831A (en) * | 2013-11-30 | 2014-04-16 | 常熟市东鑫钢管有限公司 | Hardening and tempering process of alloy-steel pipe |
| CN104190740A (en) * | 2014-07-15 | 2014-12-10 | 攀钢集团成都钢钒有限公司 | Production method of hot-rolling seamless steel pipe billet |
| CN105648189A (en) * | 2016-03-23 | 2016-06-08 | 攀钢集团成都钢钒有限公司 | Heat treatment method for small-bore seamless steel pipe for high-pressure hydrogenation device |
-
2017
- 2017-06-28 CN CN201710508355.5A patent/CN107236856B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608282A (en) * | 2009-07-03 | 2009-12-23 | 天津钢管集团股份有限公司 | Anti--40 ℃～-60 ℃ low temperature drill rod material steel pipes and manufacture method thereof |
| CN103266217A (en) * | 2013-05-10 | 2013-08-28 | 中国石油天然气集团公司 | Hardening and tempering heat treatment process for pipe end of petroleum steel pipe |
| CN103725831A (en) * | 2013-11-30 | 2014-04-16 | 常熟市东鑫钢管有限公司 | Hardening and tempering process of alloy-steel pipe |
| CN104190740A (en) * | 2014-07-15 | 2014-12-10 | 攀钢集团成都钢钒有限公司 | Production method of hot-rolling seamless steel pipe billet |
| CN105648189A (en) * | 2016-03-23 | 2016-06-08 | 攀钢集团成都钢钒有限公司 | Heat treatment method for small-bore seamless steel pipe for high-pressure hydrogenation device |
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