CN108176728A - The preparation method of 1Cr25Ti high chromium content ferrite stainless steel seamless pipes - Google Patents
The preparation method of 1Cr25Ti high chromium content ferrite stainless steel seamless pipes Download PDFInfo
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- CN108176728A CN108176728A CN201810062892.6A CN201810062892A CN108176728A CN 108176728 A CN108176728 A CN 108176728A CN 201810062892 A CN201810062892 A CN 201810062892A CN 108176728 A CN108176728 A CN 108176728A
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- cold
- drawn
- low
- 1cr25ti
- chromium content
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
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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
- C21D1/26—Methods of annealing
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- 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
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
-
- 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
- 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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
Abstract
A kind of preparation method of 1Cr25Ti high chromium content ferrite stainless steels seamless pipe, belongs to ferrite stainless steel pipe preparing technical field.Step：Heating of pipe blank, perforation, finishing, cold-drawn, again heat treatment, finishing and production tube are examined, feature：Cold-drawn is：The hollow billet obtained by correction step input oven is first subjected to low-temperature bake and controls low-temperature bake temperature and control low-temperature bake time, go out oven, it obtains treating cold-drawn hollow billet, it will treat that cold-drawn hollow billet carries out low velocity small deformation amount cold-drawn for cold drawing tube machine again, and control the technological parameter of low velocity small deformation amount cold-drawn, enter the cold-drawn of subsequent cycle after cold-drawn in the same manner, until reaching the wall thickness required by technique, obtain pipe to be heated.Be efficiently controlled in stainless steel seamless pipe cold working during broken end and cracking and using is smoothed out production, it is ensured that surface quality, dimensional tolerance and the mechanical property of obtained finished product meet the technical requirement of national standard defined.
Description
Technical field
The invention belongs to ferrite stainless steel pipe preparing technical fields, and in particular to a kind of 1Cr25Ti high chromium content ferrites are not
The preparation method of rust steel seamless pipe.
Background technology
Since ferritic stainless steel is free of or nickel containing noble metal, thus cost of raw material relative moderate less.The master of such steel
The container that purposes is the nitric acid or phosphoric acid corrosion that make resistance to villaumite such as sodium chloride solution and resistance to various concentration is wanted, can also be used as manufacture
Heat exchanger, coiled pipe (coil pipe), steam superheating pipeline and nitric acid concentrator material.
High chromium content ferrite stainless steel refers to the ferritic stainless steel that chromium content is more than 17%, and it is as the aforementioned to represent the trade mark
1Cr25Ti, such high chromium content ferrite stainless steel be in chrome stainless steel corrosion resisting property and pyro-oxidation resistance it is best one
Class.The conventional technique index request of aforementioned 1Cr25Ti ferritic stainless steels seamless pipe is：Mechanical property such as Rm >=445MPa,
Rp0.2 >=245MPa and A >=17%, the surfaces externally and internally of steel pipe, which is not allow for harmful defect, to be existed.
The flow of the conventional production process of the seamless pipe containing chrome ferritic stainless steel is followed successively by prior art：Pipe adds
Heat, perforation, finishing, cold rolling or cold-drawn, again heat treatment, finishing and product inspection, heating of pipe blank are to heat solid round steel
Such as 1050-1100 DEG C of required temperature of perforating is heated in stove；Generally use roll-type Mannesmann piercing mill perforate to the circle after heating
Steel, that is, pipe becomes hollow billet into eleven punch 11, need to be to hair since hollow billet shape and surface quality are because being not achieved production tube requirement
Pipe is cold worked (i.e. cold rolling)；Finishing includes annealing, aligning and pickling；Cold rolling or cold-drawn are by cold pilger mill or cold drawing tube machine
Cold rolling or cold-drawn are carried out to the hollow billet Jing Guo finishing at room temperature, to reach the surface quality and size required by production tube
Required precision；Heat treatment is that the steel pipe after cold rolling or cold-drawn is heat-treated by heat-treatment furnace, makes the physicochemical property of production tube
It meets the requirements；Including aligning and pickling, (purpose of pickling is to remove the oxygen generated after heat treatment in steel tube surface after finishing again
Change skin) and use the technological requirement for meeting steel tube surface quality.
As is known in the industry, since 1Cr25Ti high chromium content ferrite stainless steels have, hot-working is easy but cold-forming property is poor
Then easily there is the situation that breaks end and crack in cold-drawn or cold-rolled process in feature, specific as follows：When cold working is using at normal temperatures
During the mode of cold-drawn, routinely deflection and conventional cold-drawn speed cold-drawn, cause draw when broken end is also easy to produce when draw starts
Progress is can not be successfully, current solution is Reducing distortion amount and reduces cold-drawn speed, but proved is micro-
Its is micro-；When being cold worked when by the way of cold rolling under room temperature, rolled, rolled by relatively small deflection and mill speed
During system, easily there is longitudinal cracking and fragmentation situation in end, causes not continuing to roll.
Following table show the applicant, and with regard to stainless steel seamless pipe containing ferrochrome, by the prior art, i.e. routinely production technology carries out
The different distortion technique obtained in trial production process and draw result relationship：
As seen from the above table, since the cold working (cold-drawn, cold rolling) of the conventional seamless pipe containing chrome ferritic stainless steel can not make
1Cr25Ti high chromium content ferrite stainless steel seamless pipes reach size and surface quality requirements, thus conventional high chromium content ferrite is stainless
The cold machining process of steel seamless pipe is unable to Blindly use in the cold working to 1Cr25Ti high chromium content ferrite stainless steel seamless pipes.
As shown in the above description, can cold deformation (cold-drawn or cold rolling) processing be smoothed out size and table with 1Cr25Ti
Can face quality reach expected technology and require have inseparable causality, specifically, to obtain ideal ruler
The 1Cr25Ti high chromium content ferrite stainless steel seamless pipes of very little consistency and excellent surface quality (surface is smooth), then must be by
Good deformation technique guarantee.
The technology letter about the preparation method of ferritic stainless steel seamless pipe can be seen in disclosed Chinese patent literature
Breath, if CN1259515C recommendations have " ferritic stainless steel is seamless pipe manufacturing method and its cold machining process ", this method is first through three
Secondary rolling, then through six draws, and after through primary rolling, most afterwards through finished products, obtain ferritic stainless steel seamless pipe.For another example
CN1721128A is provided with " cold machining process of high chromium content ferrite stainless steel seamless pipe ", and the technology contents of the patent application are with before
Stating CN1259515C tends to be identical.Since deformation temperature disclosed in this two patents document is all at 500 DEG C, and since it is cold rolling
With cold-drawn alternately, thus for cold working i.e. for the aforementioned 1Cr25Ti high chromium content ferrite stainless steels seamless pipe of cold-drawn not
With referential technical inspiration, technical solution described below generates in this background.
Invention content
The task of the present invention is to provide a kind of preparation method of 1Cr25Ti high chromium content ferrite stainless steels seamless pipe, the party
Method is avoided that the table being smoothed out and ensure production tube that occurs breaking end and crack and use guarantee production in process of tube plug drawing mill
Face quality, dimensional tolerance and mechanical property.
The task of the present invention is in this way to complete, a kind of preparation side of 1Cr25Ti high chromium content ferrite stainless steels seamless pipe
Method, including the step of be followed successively by：Heating of pipe blank, perforation, finishing, cold-drawn, again heat treatment, finishing and production tube are examined, feature
It is：The cold-drawn is：The hollow billet obtained by correction step input oven is first subjected to low-temperature bake and low temperature is controlled to dry
Roasting temperature and control low-temperature bake time, go out oven, obtain treating cold-drawn hollow billet, then will treat that cold-drawn hollow billet is carried out for cold drawing tube machine
Low velocity small deformation amount cold-drawn, and the technological parameter of low velocity small deformation amount cold-drawn is controlled, after cold-drawn in the same manner
Into the cold-drawn of subsequent cycle, until reaching the wall thickness required by technique, pipe to be heated is obtained.
In the specific embodiment of the present invention, the control low-temperature bake temperature is by low-temperature bake temperature control
It is made as 150-200 DEG C；The control low-temperature bake time be by low-temperature bake time control be 20-40min.
In another specific embodiment of the present invention, the technological parameter of the control low velocity small deformation amount cold-drawn
It is：Initial cold-drawn speed control when cold drawing tube machine is bitten is 0.2-0.5m/min, will enter the cold-drawn in normal cold-drawn stage
Speed control is 2-3m/min, is 15-20% by deformation amount controlling.
In another specific embodiment of the present invention, the change of the 1Cr25Ti high chromium content ferrite stainless steels seamless pipe
It learns element and its quality % ratios is：≤ 0.12% C ,≤1.00% Si ,≤0.80% Mn ,≤0.03% S ,≤
The Ti of the Cr of 0.035% P, 24.00-27.00% and (5*C) -0.8%, remaining is Fe.
Technical solution provided by the invention is due to the hollow billet that will first be obtained in cold-drawn step by correction step in a creative way
Low-temperature bake is carried out, then carries out low velocity small deformation amount cold-drawn, thus it is cold to be not only efficiently controlled in stainless steel seamless pipe
Broken end and cracking in process and using is smoothed out production, and the 1Cr25Ti high-chromium ferrites that can be ensured that
Surface quality, dimensional tolerance and the mechanical property of body stainless steel seamless pipe meet technology as defined in standard GB/T 13296-1991
Index request.
Specific embodiment
Embodiment 1：
Step included by the preparation method of 1Cr25Ti high chromium content ferrite stainless steels seamless pipe provided by the invention is followed successively by
Heating of pipe blank, perforation, finishing, cold-drawn, again heat treatment, finishing and production tube are examined, as technical solution provided by the invention
Technical essential, Xian Jiangyouqian roads step is that the hollow billet input oven obtained by correction step carries out low temperature in cold-drawn step
Baking, the temperature control of low-temperature bake is 150 DEG C, and the time control of low-temperature bake is 40min, goes out oven, obtains treating cold-drawn
Hollow billet, then will treat that cold-drawn hollow billet carries out the cold-drawn of low velocity small deformation amount for the cold drawing tube machine using DC speed-changing motor and produces, specifically
It is：To start cold-drawn namely by cold-drawn speed control when biting is 0.2m/min, so as to cold to improve after smoothly biting
It pulls out speed to provide safeguard, is entering the cold-drawn stage after biting, be 2m/min by cold-drawn speed control, be by deformation amount controlling
15%, larger Drawing Force and deformation heat are generated to avoid big deflection, avoids broken end and surface galling, after cold-drawn with
Same way enters the cold-drawn of subsequent cycle, until reaching the wall thickness (i.e. pipe thickness) required by technique, obtains to be heated
Pipe, through it is described heat treatment, again finishing and to production tube examine, obtain 1Cr25Ti high chromium content ferrite stainless steel seamless pipes, change
It learns element and its quality % ratios is：≤ 0.12% C ,≤1.00% Si ,≤0.80% Mn ,≤0.03% S ,≤
The Ti of the Cr of 0.035% P, 24.00-27.00% and (5*C) -0.8%, remaining is Fe.
Embodiment 2：
Step included by the preparation method of 1Cr25Ti high chromium content ferrite stainless steels seamless pipe provided by the invention is followed successively by
Heating of pipe blank, perforation, finishing, cold-drawn, again heat treatment, finishing and production tube are examined, as technical solution provided by the invention
Technical essential, Xian Jiangyouqian roads step is that the hollow billet input oven obtained by correction step carries out low temperature in cold-drawn step
Baking, the temperature control of low-temperature bake is 170 DEG C, and the time control of low-temperature bake is 30min, goes out oven, obtains treating cold-drawn
Hollow billet, then will treat that cold-drawn hollow billet carries out the cold-drawn of low velocity small deformation amount for the cold drawing tube machine using DC speed-changing motor and produces, specifically
It is：To start cold-drawn namely by cold-drawn speed control when biting is 0.35m/min, so as to cold to improve after smoothly biting
It pulls out speed to provide safeguard, is entering the cold-drawn stage after biting, be 2.5m/min by cold-drawn speed control, by deformation amount controlling
It is 18%, larger Drawing Force and deformation heat is generated to avoid big deflection, broken end and surface galling is avoided, after cold-drawn
Enter the cold-drawn of subsequent cycle in the same manner, until reaching the wall thickness (i.e. pipe thickness) required by technique, obtain treating hot place
Reason pipe, through it is described heat treatment, again finishing and to production tube examine, obtain 1Cr25Ti high chromium content ferrite stainless steel seamless pipes,
Chemical element and its quality % ratios are：≤ 0.12% C ,≤1.00% Si ,≤0.80% Mn ,≤0.03% S ,≤
The Ti of the Cr of 0.035% P, 24.00-27.00% and (5*C) -0.8%, remaining is Fe.
Embodiment 3：
Step included by the preparation method of 1Cr25Ti high chromium content ferrite stainless steels seamless pipe provided by the invention is followed successively by
Heating of pipe blank, perforation, finishing, cold-drawn, again heat treatment, finishing and production tube are examined, as technical solution provided by the invention
Technical essential, Xian Jiangyouqian roads step is that the hollow billet input oven obtained by correction step carries out low temperature in cold-drawn step
Baking, the temperature control of low-temperature bake is 200 DEG C, and the time control of low-temperature bake is 20min, goes out oven, obtains treating cold-drawn
Hollow billet, then will treat that cold-drawn hollow billet carries out the cold-drawn of low velocity small deformation amount for the cold drawing tube machine using DC speed-changing motor and produces, specifically
It is：To start cold-drawn namely by cold-drawn speed control when biting is 0.5m/min, so as to cold to improve after smoothly biting
It pulls out speed to provide safeguard, is entering the cold-drawn stage after biting, be 3m/min by cold-drawn speed control, be by deformation amount controlling
20%, larger Drawing Force and deformation heat are generated to avoid big deflection, avoids broken end and surface galling, after cold-drawn with
Same way enters the cold-drawn of subsequent cycle, until reaching the wall thickness (i.e. pipe thickness) required by technique, obtains to be heated
Pipe, through it is described heat treatment, again finishing and to production tube examine, obtain 1Cr25Ti high chromium content ferrite stainless steel seamless pipes, change
It learns element and its quality % ratios is：≤ 0.12% C ,≤1.00% Si ,≤0.80% Mn ,≤0.03% S ,≤
The Ti of the Cr of 0.035% P, 24.00-27.00% and (5*C) -0.8%, remaining is Fe.
The 1Cr25Ti high obtained using the cold-drawing technology of above-described embodiment 1 to 3 with the cold-drawing technology in use prior art
The quality of chrome ferritic stainless steel seamless pipe is as shown in following table：
Pass through the above embodiment, 1Cr25Ti high chromium content ferrite stainless steel seamless pipes finished size, surface quality and mechanics
Performance meets GB13296-1991 boilers, heat exchanger stainless-steel seamless pipe technical conditions, stable production process, product matter
Amount meets demand, with good economic efficiency and social benefit.
Claims (4)
1. a kind of preparation method of 1Cr25Ti high chromium content ferrite stainless steels seamless pipe, including the step of be followed successively by：Heating of pipe blank,
Perforation, finishing, cold-drawn, again heat treatment, finishing and production tube are examined, it is characterised in that：The cold-drawn is：It will first be walked by finishing
Suddenly the hollow billet input oven obtained carries out low-temperature bake and controls low-temperature bake temperature and control low-temperature bake time, goes out to dry
Oven obtains treating cold-drawn hollow billet, then will treat that cold-drawn hollow billet carries out low velocity small deformation amount cold-drawn for cold drawing tube machine, and controls low
The technological parameter of speed small deformation amount cold-drawn, enters the cold-drawn of subsequent cycle in the same manner after cold-drawn, until reaching work
Wall thickness required by skill obtains pipe to be heated.
2. the preparation method of 1Cr25Ti high chromium content ferrite stainless steels seamless pipe according to claim 1, it is characterised in that institute
The control low-temperature bake temperature stated is for 150-200 DEG C by the control of low-temperature bake temperature；The control low-temperature bake time is
It is 20-40min by low-temperature bake time control.
3. the preparation method of 1Cr25Ti high chromium content ferrite stainless steels seamless pipe according to claim 1, it is characterised in that institute
The technological parameter of control low velocity small deformation amount cold-drawn stated is：Initial cold-drawn speed control when cold drawing tube machine is bitten is
The cold-drawn speed control for entering the normal cold-drawn stage is 2-3m/min by 0.2-0.5m/min, is 15-20% by deformation amount controlling.
4. the preparation method of 1Cr25Ti high chromium content ferrite stainless steels seamless pipe according to claim 1, it is characterised in that institute
The chemical element and its quality % ratios for stating 1Cr25Ti high chromium content ferrite stainless steel seamless pipes be：≤ 0.12% C ,≤1.00%
Si ,≤0.80% Mn ,≤0.03% S ,≤0.035% P, 24.00-27.00% Cr and（5*C）- 0.8% Ti, Yu Wei
Fe。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810062892.6A CN108176728B (en) | 2018-01-23 | 2018-01-23 | The preparation method of 1Cr25Ti high chromium content ferrite stainless steel seamless pipe |
| PCT/CN2018/096740 WO2019144584A1 (en) | 2018-01-23 | 2018-07-24 | Method for preparing 1cr25ti high-chromium ferrite stainless steel seamless tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810062892.6A CN108176728B (en) | 2018-01-23 | 2018-01-23 | The preparation method of 1Cr25Ti high chromium content ferrite stainless steel seamless pipe |
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| CN108176728A true CN108176728A (en) | 2018-06-19 |
| CN108176728B CN108176728B (en) | 2019-06-07 |
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| WO (1) | WO2019144584A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019144584A1 (en) * | 2018-01-23 | 2019-08-01 | 苏州钢特威钢管有限公司 | Method for preparing 1cr25ti high-chromium ferrite stainless steel seamless tube |
| CN114160604A (en) * | 2021-11-23 | 2022-03-11 | 浙江久立特材科技股份有限公司 | Stainless steel seamless pipe and preparation method and application thereof |
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|---|---|---|---|---|
| CN114029344B (en) * | 2021-11-09 | 2023-11-21 | 攀钢集团攀枝花钢钒有限公司 | Method for controlling iron content in emulsion |
| CN114700387B (en) * | 2022-03-28 | 2024-04-12 | 西部金属材料股份有限公司 | Preparation method of high-strength titanium alloy cold-rolled pipe |
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| WO2019144584A1 (en) | 2019-08-01 |
| CN108176728B (en) | 2019-06-07 |
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