CN107236856A - A kind of seamless steel pipe Technology for Heating Processing - Google Patents
A kind of seamless steel pipe Technology for Heating Processing Download PDFInfo
- Publication number
- CN107236856A CN107236856A CN201710508355.5A CN201710508355A CN107236856A CN 107236856 A CN107236856 A CN 107236856A CN 201710508355 A CN201710508355 A CN 201710508355A CN 107236856 A CN107236856 A CN 107236856A
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- Prior art keywords
- steel pipe
- seamless steel
- heating
- temperature
- annealing
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Classifications
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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
Abstract
The invention discloses a kind of seamless steel pipe Technology for Heating Processing, comprise the following steps：1) anneal：The seamless steel pipe of semi-finished product is delivered in Muffle furnace and made annealing treatment；2) quench：Seamless steel pipe after annealing is delivered in glowing furnace and carries out Quenching Treatment, is divided into one section of heating, heating two sections and soaking zone；3) quenching liquid pours leaching：Quenching goes out the quenching liquid that glowing furnace immersion temperature is 15 25 DEG C after finishing, the cool time is 45 55s；4) it is tempered：Finally seamless steel pipe is transported in tempering furnace and carries out temper, tempering is come out of the stove after terminating and is air-cooled to room temperature.This kind of Technology for Heating Processing can strengthen the stability of seamless steel pipe performance, while the phenomenons such as correction can not be aligned because of the bending of heat treatment generation, mechanical heterogeneity by avoiding seamless steel pipe.
Description
Technical field
Field is manufactured the present invention relates to seamless steel pipe, and in particular to a kind of seamless steel pipe Technology for Heating Processing.
Background technology
Seamless steel pipe Technology for Heating Processing is that seamless steel pipe workpiece heat to certain temperature is incubated into a period of time, then makes it
Slowly cool down.Seamless steel pipe heat treatment be by steel pipe be heated to undergo phase transition or partial phase change temperature, via slow after insulation
The heat treatment method of cooling.The purpose of heat treatment be in order to reduce hardness, improve plasticity, improve processing characteristics；Elimination internal stress,
Stable steel pipe sizes, placement deformation and cracking；Crystal grain thinning, the mechanical property for improving tissue, improving seamless steel pipe.
Current seamless steel pipe is when being heat-treated, after being normally incubated, as long as by closing heat-treatment furnace
Burner is heated, no longer heat supply, 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.
Because the universal length of seamless steel pipe is longer, about 4~12m；Therefore, will to have severe temperature poor for whole seamless steel pipe
Different, the consequence thus brought is as follows：
(1) seamless steel pipe bent because of the stress that the temperature difference is produced；
(2) the mechanical property difference of homogeneous tube is larger.
Due to the steel pipe time long enough of Technology for Heating Processing typically used, so while whole seamless steel pipe mechanical property
Differ greatly, but can meet user's requirement, therefore not by enough attention.Raising with user to product requirement, such a presence
The steel pipe of two ends difference has been difficult to the requirement for meeting user.And the bending that the stress that the temperature difference is produced is caused can be using the side aligned
Formula is carried out, and still, pipe end can not be aligned does not have suitable straightener with part seamless steel pipe, causes product lumber recovery to decline
Even finished product can not be turned into because aligning can not be completed.
The content of the invention
For problems of the prior art, the invention provides a kind of seamless steel pipe Technology for Heating Processing, at this kind heat
Science and engineering artistic skill strengthens the stability of seamless steel pipe performance, while avoiding bending, the mechanical property that seamless steel pipe is produced by heat treatment
Energy is uneven and can not align the phenomenons such as correction.
In order to achieve the above object, the present invention is achieved through the following technical solutions：
A kind of seamless steel pipe Technology for Heating Processing, is followed the steps below：
(1) anneal：The seamless steel pipe of semi-finished product is delivered in Muffle furnace and made annealing treatment, annealing temperature is 520-
560 DEG C, annealing soaking time is 40-60min；
(2) quench：Seamless steel pipe after annealing is delivered in glowing furnace and carries out Quenching Treatment, is divided into one section of heating, adds
Hot two sections and soaking zone；
(3) quenching liquid pours leaching：Quenching goes out glowing furnace immersion temperature after finishing be 15-25 DEG C of quenching liquid, and the cool time is
45-55s；
(4) it is tempered：Finally seamless steel pipe is transported in tempering furnace and carries out temper, tempering is come out of the stove after terminating and is air-cooled to
Room temperature.
Further, in step (1), before annealing, first annealing furnace is preheated, preheating temperature is 480-
520℃。
Further, the temperature that one section is heated in step (2), in the Quenching Treatment is 780-820 DEG C, retention time
For 20-30min.
Further, the temperature that two sections are heated in step (2), in the Quenching Treatment is 840-880 DEG C, retention time
For 30-40min.
Further, in step (2), the temperature of soaking zone is 790-830 DEG C in the Quenching Treatment, and the retention time is
25-35min。
Preferably, in step (3), the quenching liquid is using isothermal quenching oil.
Further, in step (4), the temper step is that drill pipe body workpiece first is warming up into 580-620
DEG C, 30-40min is incubated, 360-420 DEG C is cooled to afterwards, 20-30min is incubated.
As a kind of prioritization scheme of the present invention, the seamless steel pipe includes following chemical composition 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 is Fe and inevitable impurity.
Further, the seamless steel pipe includes following chemical composition by weight percentage：C 0.43%, Si
0.24%th, Mn 0.60%, Ni 0.60%, S 0.02%, P 0.02%, surplus are Fe and inevitable impurity.
The present invention has following beneficial effect：
(1) this invention removes the difference that seamless steel pipe two ends performance is present is caused because of ordinary heat treatment, enhance
The stability of whole seamless steel pipe performance, while it also avoid bending, mechanical property inequality that seamless steel pipe is produced by heat treatment
Phenomenon even that correction aligns；
(2) above-mentioned seamless steel pipe and its Technology for Heating Processing are used, can make it that finished product seamless steel pipe internal structure crystal grain is equal
Even, face crack is small, and various crystal are reasonably distributed, and overall performance is good, and the final steel pipe performance inconsistency scope after heat treatment is small,
Compared with common tempering is heat-treated, this kind of seamless steel pipe performance indications concentration degree is high, and performance is stable, the heat-treatability of same grade of steel
Energy：This kind of seamless steel pipe yield strength fluctuation range can≤60MPa, steel tube performance qualification rate is up to more than 99%.
Embodiment
The embodiment of the present invention is further described with reference to embodiment, following examples are only used for more
Technical scheme is clearly demonstrated, and can not be limited the scope of the invention with this.
Embodiment 1
A kind of seamless steel pipe Technology for Heating Processing, is followed the steps below：
(1) anneal：First the semi-finished product seamless steel pipe after casting mold is delivered in Muffle furnace and 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 composition by weight percentage：C 0.21%, Si 0.16%, Mn
0.48%th, Ni 0.37%, S 0.01%, P 0.01%, surplus be Fe and inevitable impurity, wherein, inevitably it is miscellaneous
The content of matter is controlled≤0.05%；
(2) quench：The seamless steel pipe after annealing is delivered in glowing furnace again and carries out Quenching Treatment, is divided into three below rank
Section：
The temperature of one section of heating is 780 DEG C, and the retention time is 20min；
The temperature of two sections of heating is 840 DEG C, and the retention time is 30min；
The temperature of soaking zone is 790 DEG C, and the retention time is 25min；
(3) quenching liquid pours leaching：Quenching goes out glowing furnace immersion temperature in 15 DEG C of isothermal quenching oil, to quench after finishing
Time is set as 45s；
(4) it is tempered：Finally seamless steel pipe is transported in tempering furnace and carries out temper, is specifically first by seamless steel pipe liter
Temperature is incubated 30min, is cooled to 360 DEG C afterwards to 580 DEG C, is incubated 20min, and tempering is come out of the stove after terminating to be air-cooled to room temperature and complete
The seamless steel pipe Technology for Heating Processing of the present invention.
Embodiment 2
A kind of seamless steel pipe Technology for Heating Processing, is followed the steps below：
(1) anneal：First the semi-finished product seamless steel pipe after casting mold is delivered in Muffle furnace and 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 composition by weight percentage：C 0.25%, Si 0.20%, Mn
0.52%th, Ni 0.42%, S 0.015%, P 0.015%, surplus be Fe and inevitable impurity, wherein, inevitably
The content of impurity is controlled≤0.05%；
(2) quench：The seamless steel pipe after annealing is delivered in glowing furnace again and carries out Quenching Treatment, is divided into three below rank
Section：
The temperature of one section of heating is 7890 DEG C, and the retention time is 22min；
The temperature of two sections of heating is 850 DEG C, and the retention time is 32min；
The temperature of soaking zone is 800 DEG C, and the retention time is 28min；
(3) quenching liquid pours leaching：Quenching goes out glowing furnace immersion temperature in 18 DEG C of isothermal quenching oil, to quench after finishing
Time is set as 48s；
(4) it is tempered：Finally seamless steel pipe is transported in tempering furnace and carries out temper, is specifically first by seamless steel pipe liter
Temperature is incubated 32min, is cooled to 370 DEG C afterwards to 590 DEG C, is incubated 22min, and tempering is come out of the stove after terminating to be air-cooled to room temperature and complete
The seamless steel pipe Technology for Heating Processing of the present invention.
Embodiment 3
A kind of seamless steel pipe Technology for Heating Processing, is followed the steps below：
(1) anneal：First the semi-finished product seamless steel pipe after casting mold is delivered in Muffle furnace and 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 composition by weight percentage：C 0.43%, Si 0.24%, Mn
0.60%th, Ni 0.60%, S 0.02%, P 0.02%, surplus be Fe and inevitable impurity, wherein, inevitably it is miscellaneous
The content of matter is controlled≤0.05%；
(2) quench：The seamless steel pipe after annealing is delivered in glowing furnace again and carries out Quenching Treatment, is divided into three below rank
Section：
The temperature of one section of heating is 80 DEG C, and the retention time is 25min；
The temperature of two sections of heating is 860 DEG C, and the retention time is 35min；
The temperature of soaking zone is 810 DEG C, and the retention time is 30min；
(3) quenching liquid pours leaching：Quenching goes out glowing furnace immersion temperature in 20 DEG C of isothermal quenching oil, to quench after finishing
Time is set as 50s；
(4) it is tempered：Finally seamless steel pipe is transported in tempering furnace and carries out temper, is specifically first by seamless steel pipe liter
Temperature is incubated 35min, is cooled to 390 DEG C afterwards to 600 DEG C, is incubated 25min, and tempering is come out of the stove after terminating to be air-cooled to room temperature and complete
The seamless steel pipe Technology for Heating Processing of the present invention.
Embodiment 4
A kind of seamless steel pipe Technology for Heating Processing, is followed the steps below：
(1) anneal：First the semi-finished product seamless steel pipe after casting mold is delivered in Muffle furnace and 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 composition by weight percentage：C 0.40%, Si 0.28%, Mn
0.68%th, Ni 0.47%, S 0.025%, P 0.025%, surplus be Fe and inevitable impurity, wherein, inevitably
The content of impurity is controlled≤0.05%；
(2) quench：The seamless steel pipe after annealing is delivered in glowing furnace again and carries out Quenching Treatment, is divided into three below rank
Section：
The temperature of one section of heating is 810 DEG C, and the retention time is 28min；
The temperature of two sections of heating is 870 DEG C, and the retention time is 38min；
The temperature of soaking zone is 820 DEG C, and the retention time is 32min；
(3) quenching liquid pours leaching：Quenching goes out glowing furnace immersion temperature in 22 DEG C of isothermal quenching oil, to quench after finishing
Time is set as 52s；
(4) it is tempered：Finally seamless steel pipe is transported in tempering furnace and carries out temper, is specifically first by seamless steel pipe liter
Temperature is incubated 38min, is cooled to 410 DEG C afterwards to 610 DEG C, is incubated 28min, and tempering is come out of the stove after terminating to be air-cooled to room temperature and complete
The seamless steel pipe Technology for Heating Processing of the present invention.
Embodiment 5
A kind of seamless steel pipe Technology for Heating Processing, is followed the steps below：
(1) anneal：First the semi-finished product seamless steel pipe after casting mold is delivered in Muffle furnace and 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 composition by weight percentage：C 0.45%, Si 0.32%, Mn
0.72%th, Ni 0.53%, S 0.03%, P 0.03%, surplus be Fe and inevitable impurity, wherein, inevitably it is miscellaneous
The content of matter is controlled≤0.05%；
(5) quench：The seamless steel pipe after annealing is delivered in glowing furnace again and carries out Quenching Treatment, is divided into three below rank
Section：
The temperature of one section of heating is 820 DEG C, and the retention time is 30min；
The temperature of two sections of heating is 880 DEG C, and the retention time is 40min；
The temperature of soaking zone is 830 DEG C, and the retention time is 35min；
(3) quenching liquid pours leaching：Quenching goes out glowing furnace immersion temperature in 25 DEG C of isothermal quenching oil, to quench after finishing
Time is set as 55s；
(4) it is tempered：Finally seamless steel pipe is transported in tempering furnace and carries out temper, is specifically first by seamless steel pipe liter
Temperature is incubated 40min, is cooled to 420 DEG C afterwards to 620 DEG C, is incubated 30min, and tempering is come out of the stove after terminating to be air-cooled to room temperature and complete
The seamless steel pipe Technology for Heating Processing of the present invention.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, although with reference to foregoing reality
Apply example the present invention is described in detail, for those skilled in the art, it still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic.All essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (9)
1. a kind of seamless steel pipe Technology for Heating Processing, it is characterised in that comprise the following steps：
(1) anneal：The seamless steel pipe of semi-finished product is delivered in Muffle furnace and made annealing treatment, annealing temperature is 520-560 DEG C,
Annealing soaking time is 40-60min；
(2) quench：Seamless steel pipe after annealing is delivered in glowing furnace and carries out Quenching Treatment, is divided into one section of heating, heating two
Section and soaking zone；
(3) quenching liquid pours leaching：Quenching goes out the quenching liquid that glowing furnace immersion temperature is 15-25 DEG C after finishing, the cool time is 45-
55s；
(4) it is tempered：Finally seamless steel pipe is transported in tempering furnace and carries out temper, tempering is come out of the stove after terminating and is air-cooled to room temperature
.
2. a kind of seamless steel pipe Technology for Heating Processing according to claim 1, it is characterised in that in step (1), in annealing
Before processing, is first preheated to annealing furnace, and preheating temperature is 480-520 DEG C.
3. a kind of seamless steel pipe Technology for Heating Processing according to claim 1, it is characterised in that described to quench in step (2)
The temperature of one section of heating is 780-820 DEG C in fire processing, and the retention time is 20-30min.
4. a kind of seamless steel pipe Technology for Heating Processing according to claim 1, it is characterised in that described to quench in step (2)
The temperature of two sections of heating is 840-880 DEG C in fire processing, and the retention time is 30-40min.
5. a kind of seamless steel pipe Technology for Heating Processing according to claim 1, it is characterised in that described to quench in step (2)
The temperature of soaking zone is 790-830 DEG C in fire processing, and the retention time is 25-35min.
6. a kind of seamless steel pipe Technology for Heating Processing according to claim 1, it is characterised in that described to quench in step (3)
Fiery liquid is using isothermal quenching oil.
7. a kind of seamless steel pipe Technology for Heating Processing according to claim 1, it is characterised in that in step (4), described time
Fiery process step is that drill pipe body workpiece first is warming up into 580-620 DEG C, is incubated 30-40min, 360-420 DEG C is cooled to afterwards,
It is incubated 20-30min.
8. a kind of seamless steel pipe Technology for Heating Processing according to any one in claim 1-7, it is characterised in that the nothing
Stitch steel pipe includes following chemical composition by weight percentage：C 0.21~0.45%, Si 0.16~0.32%, Mn 0.48~
0.72%th, Ni 0.37~0.53%, S 0.01~0.03%, P 0.01~0.03%, surplus are Fe and inevitably miscellaneous
Matter.
9. a kind of seamless steel pipe Technology for Heating Processing according to claim 8, it is characterised in that the seamless steel pipe is by weight
Measuring percentages includes following chemical composition：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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710508355.5A CN107236856B (en) | 2017-06-28 | 2017-06-28 | A kind of seamless steel pipe heat treatment process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710508355.5A CN107236856B (en) | 2017-06-28 | 2017-06-28 | A kind of seamless steel pipe heat treatment process |
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| CN107236856A true CN107236856A (en) | 2017-10-10 |
| CN107236856B CN107236856B (en) | 2018-12-21 |
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ID=59990006
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Cited By (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 |
| 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 |
| 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 |
| 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 |
| CN114807526A (en) * | 2022-04-13 | 2022-07-29 | 大冶特殊钢有限公司 | Heat treatment method of large-size 45CrNiMoV medium-thickness wall seamless steel pipe |
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| 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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| 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 |
| 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 |
| 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 |
| 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 |
| CN114807526A (en) * | 2022-04-13 | 2022-07-29 | 大冶特殊钢有限公司 | Heat treatment method of large-size 45CrNiMoV medium-thickness wall seamless 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 |
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| Publication number | Publication date |
|---|---|
| CN107236856B (en) | 2018-12-21 |
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