CN102794305A - Method for preparing heat-resistance stainless steel seamless tube - Google Patents
Method for preparing heat-resistance stainless steel seamless tube Download PDFInfo
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- CN102794305A CN102794305A CN2011101378095A CN201110137809A CN102794305A CN 102794305 A CN102794305 A CN 102794305A CN 2011101378095 A CN2011101378095 A CN 2011101378095A CN 201110137809 A CN201110137809 A CN 201110137809A CN 102794305 A CN102794305 A CN 102794305A
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Abstract
The invention provides a method for preparing a heat-resistance stainless steel seamless tube. The method comprises a piercing process and a cooling process; in the piercing process, cross piercing is performed during hot-rolling piercing; a tube billet does helical motion; and the piercing speed is controlled to be 1.4 to 1.8m/s. According to the method, the piercing mode is optimized, the reasonable hot-rolling piercing speed (roller rotation line speed) is controlled, severe temperature rise under the condition of high-speed sliding friction in a piercing deformation high-temperature area can be reduced, the surface of a tubular billet is prevented from being cracked, and the surface quality of a product is improved.
Description
Technical field
The present invention relates to the pipe-making method of metallurgy industry 1Cr25Ni20Si2 Austenitic heat-resistance stainless steel seamless pipe, refer in particular to the control method of hot-puncturing process tube-surface quality.
Background technology
The 1Cr25Ni20Si2 steel belongs to the Austenitic heat-resistance stainless steel, have more excellent anti-oxidant, anti-carburizing can and good anti-general corrosion performance.Maximum operation (service) temperature reaches 1200 ℃, and the maximum temperature of using continuously is 1150 ℃.Be widely used in making the various heat-resistant components of heating furnace, like the high temperature furnace pipe of ammonia synthesis unit, heat boiler tube, the furnace roller of continuous oven etc.Because alloying element content is higher, so plasticity is low, and resistance of deformation is big, belongs to the inductile less-deformable steel, and it is bigger on the Mannesmann piercing machine, to carry out the hot-puncturing process difficulty, and there are defectives such as crackle in perforation back hollow billet tail surface, can not satisfy the product technology requirement.
1Cr25Ni20Si2 technical requirements of users: mechanical property requirements Rm >=520MPa, Rp0.2 >=205MPa, A >=35%.The surfaces externally and internally of steel pipe does not allow crackle, folds, rolls folding, scabs, absciss layer exists.Chemical composition sees the following form 1.
Table 1 1Cr25Ni20Si2 smelting component
Up to the present, the neither one standard comprises 1Cr25Ni20Si2 steel (in the heat-resisting rod iron of standard GB/T1221 this trade mark being arranged) in the stainless-steel seamless pipe national standard of China, and the maturation process that domestic no 1Cr25Ni20Si2 steel seamless pipe is produced is described.The external general hot extrusion+cold worked pipe-making method that adopts, lumber recovery is low and production cost is high, domesticly adopts hot piercing+cold worked pipe-making method basically, but little manufacturing enterprise can produce the seamless pipe of this type of trade mark.Through patent retrieval, do not find the use report of correlation technique.
Pipe (round steel) needs to process hollow hollow billet through heating and hot-puncturing process, and for follow-up cold working (cold rolling, cold-drawn) provides the pipe material, wherein hollow billet surfaces externally and internally quality is particularly important.Since the 1Cr25Ni20Si2 alloy content up to 47% or more with elements Si to the influence of hot-workability, deformation temperature rises when adding hot-puncturing process, has produced the interior surface check of hollow billet afterbody, sees Fig. 1, has had a strong impact on and has been cold worked into the QC lumber recovery.The hot-puncturing process situation is following under the different condition:
1, adopt different piercing temperature 1060-1120 ℃ to bore a hole; The pipe diameter is 77mm; The perforation specification is 80 * 8mm (external diameter * wall thickness), and deflection is 61.2%, and punching rate (pipe rotational line speed) is 1.5m/s; Perforations results (seeing the following form 2): very easily produce during the low temperature perforation and roll card (preceding card), perforation back hollow billet head inner surface has the sparrow skin; Middle temperature perforation back hollow billet afterbody inner surface has longitudinal crack; Hollow billet afterbody crackle is even more serious during the high temperature perforation.
2, adopt different deflection 59-68% to bore a hole; The pipe diameter is 77mm; The perforation specification is 80 * 6.5-8.5mm (external diameter * wall thickness), and piercing temperature is 1080 ℃, and punching rate (pipe rotational line speed) is 1.5m/s; Perforations results (seeing the following form 1): when adopting the small deformation amount, perforation back hollow billet afterbody still has longitudinal crack; When adopting aximal deformation value, perforation back hollow billet afterbody crackle is comparatively serious.
3, adopt different punching rate (pipe rotational line speed) 1.4-2.0m/s to bore a hole; The pipe diameter is 77mm; The perforation specification is 80 * 8mm (external diameter * wall thickness), and piercing temperature is 1080 ℃, and deflection is 61.2%; Perforations results (seeing the following form 1): be prone to produce during the low speed perforation and roll card (back card), perforation back hollow billet afterbody inner surface also has crackle; Perforation back hollow billet afterbody crackle also is even more serious at a high speed.
The hollow billet quality of the different piercing process parameters of table 2
| Piercing temperature ℃ | Deflection % | Linear velocity m/s | Perforations results |
| 1060-1120 | 61.2 | 1.5 | Roll card, sparrow skin, crackle |
| 1080 | 59-68 | 1.5 | Crackle |
| 1080 | 61.2 | 1.4-2.0 | Crackle |
Above-mentioned hot-puncturing process testing surface adopts different piercing temperature, deflection, punching rate, the generation of the hollow billet afterbody inner surface longitudinal crack of all can't avoiding boring a hole.The control method of hot-puncturing process hollow billet afterbody crackle becomes the key problem in technology of heat-resisting stainless control pipe.
Summary of the invention
Therefore, the present invention's technical problem that will solve is: provide a kind of and can control the heat-resistance stainless steel seamless steel pipe preparation method that the hollow billet face crack produces.
In order to solve above technical problem, technical scheme of the present invention is: a kind of preparation method of heat-resistance stainless steel seamless pipe comprises perforation process and refrigerating work procedure; In said perforation process; Roll piercing during hot-puncturing process, pipe is done screw, and punching rate is controlled at 1.4-1.8m/s.
Pipe is done screw (roll piercing) during hot-puncturing process, and punching rate (being roll rotational line speed) is controlled at 1.4-1.8m/s, reduces violent temperature rise under the high-speed slide friction condition of perforation distortion high-temperature region, prevents the generation of hollow billet face crack.Speed is low excessively, makes the hollow billet difficulty of dishing out produce and roll card (block the back) fault during punch off owing to inertia force is not enough.
In a preferred embodiment, an oblique aperture bores towards coming directly towards direction in place, nearly top on the push rod of connection top.
Further, said aperture and ejector rob axis are 45-60 ° to angle.The aperture of said aperture is 3-5mm.
Preferably, in the said refrigerating work procedure cooling water flow through hollow push rod; The pressure of said cooling water is 0.2-0.4MPa.Cooling water cools off top and perforation hollow billet through aperture through in the hollow push rod, thereby can more effectively control the generation of hollow billet surface cracks.The top because of the perforation high temperature be stressed, can not punch, otherwise very easily the cracking, so the selection hole is beaten on push rod.
Preferably, said piercing temperature is controlled at 1070-1110 ℃; The perforation deflection is controlled at 60-68%.Adopt the Mannesmann piercing machine that pipe is bored a hole; Piercing temperature is controlled at 1070-1110 ℃; Can control the hollow billet face crack that distortion heat causes better, produce defectives such as rolling card (preceding card) fault and waste tube head generation sparrow skin in the time of also can further reducing punch on; The perforation deflection is controlled at 60-68%, if the perforation deflection is too small, can increase cold deformation (increasing cold working production passage).In the background technology part, mention the generation of adopting different piercing temperature, deflection, punching rates still can't avoid boring a hole hollow billet afterbody inner surface longitudinal crack in the table 2.Can find out that simple control temperature and deflection can not solve technical problem of the present invention, the present invention is controlled at above-mentioned scope with piercing temperature and deflection on the basis of roll piercing and control rate, can reach the effect that prevents that crackle from producing better.
Heat-resistance stainless steel seamless pipe production main technique flow process is following: pipe-heating-perforation-cooling-finishing-cold rolling-degreasing-heat treatment-finishing-cold rolling/cold-drawn (being circulated to finished product)-degreasing-heat treatment-finishing-check warehouse-in.Steel pipe is cold rolling, heat treatment, finishing (aligning, Pipe Cutting, pickling etc.) technology is with reference to common austenitic stainless steel production technology.
The present invention has obtained following beneficial effect through improving to the perforation flow process and then to cooling process:
1, the perforation means of optimizing, reasonably hot-puncturing process speed can reduce violent temperature rise under the high-speed slide friction condition of perforation distortion high-temperature region, prevents the generation of hollow billet face crack, improves product surface quality;
2, control hot-puncturing process temperature and deflection can more effectively prevent to cause the hollow billet face crack because piercing temperature is higher with the bigger distortion heat of generation;
3, hollow billet and perforating head cooling method can more effectively be cooled off the perforation hollow billet, thereby reduce the temperature of hollow billet inner surface, avoid the generation of face crack, guarantee surface quality of products.
Description of drawings
Fig. 1 is the present invention's deformed area sketch map of boring a hole.
Among the figure, 1-hollow billet, 2-top, 3-(cydariform) roll, 4-pipe (solid round steel), 5-guide plate, 6-roll.
Fig. 2 is a top of the present invention push rod sketch map.
Among the figure, 2-top, 7-aperture, 8-push rod.
The specific embodiment
Main technique is: blank φ 80mm-light base φ 77mm-heating-perforation 80 * 8mm-finishing-cold rolling 57 * 5mm-degreasing-heat treatment-finishing-cold rolling 38 * 3.5mm-degreasing-heat treatment-finishing-check warehouse-in.
1, perforation process
Adopt piercing temperature to carry out roll piercing for 1070 ℃, pipe is done screw.The pipe diameter is 77mm, and the perforation specification is 80 * 8mm (external diameter * wall thickness), and deflection is 61.2%, and punching rate (being roll rotational line speed) is 1.5m/s, adopts hollow billet and perforating head cooling method, and perforation back hollow billet surface quality is good, and perforation procedure is smooth.(seeing the following form 3)
2, other operation
Steel pipe is cold rolling, heat treatment, finishing (aligning, Pipe Cutting, pickling etc.) operation are implemented with reference to common austenitic stainless steel production technology, and implementation process is smooth, and end properties is qualified, the influence to environmental protection and secure context do not occur.
Table 3 embodiment 1 effect
| Piercing temperature ℃ | Deflection % | Linear velocity m/s | Cooling method | The perforation quality | End properties |
| 1070 | 612 | 1.5 | Adopt | The surface flawless | Qualified |
Main technique is: blank φ 80mm-light base φ 77mm-heating-perforation 80 * 7.5mm-finishing-cold rolling 57 * 5.5mm-degreasing-heat treatment-finishing-cold rolling 42 * 4mm-degreasing-heat treatment-finishing-check warehouse-in.
1, perforation process
Adopt piercing temperature to carry out roll piercing for 1090 ℃, pipe is done screw.The pipe diameter is 77mm, and the perforation specification is 80 * 7.5mm (external diameter * wall thickness), and deflection is 63.5%, and punching rate (being roll rotational line speed) is 1.6m/s, adopts hollow billet and perforating head cooling method, and perforation back hollow billet surface quality is good, and perforation procedure is smooth.(seeing the following form 4)
2, other operation
Steel pipe is cold rolling, heat treatment, finishing (aligning, Pipe Cutting, pickling etc.) operation are implemented with reference to common austenitic stainless steel production technology, and implementation process is smooth, and end properties is qualified, the influence to environmental protection and secure context do not occur.
Table 4 technical scheme two and effect
| Piercing temperature ℃ | Deflection % | Linear velocity m/s | Cooling method | The perforation quality | End properties |
| 1090 | 63.5 | 1.6 | Adopt | The surface flawless | Qualified |
Main technique is: blank φ 110mm-light base φ 107mm-heating-perforation 114 * 8.5mm-finishing-cold rolling 89 * 5.5mm-degreasing-heat treatment-finishing-cold rolling 73 * 3mm-degreasing-heat treatment-finishing-check warehouse-in.
1, perforation process
Adopt piercing temperature to bore a hole for 1100 ℃, pipe is done screw and is realized roll piercing during hot-puncturing process, and pipe is done screw.The pipe diameter is 107mm, and the perforation specification is 114 * 8.5mm (external diameter * wall thickness), and deflection is 68%, and punching rate (being roll rotational line speed) is 1.7m/s, adopts hollow billet and perforating head cooling method, and perforation back hollow billet surface quality is good, and perforation procedure is smooth.(seeing the following form 5)
2, other operation
Steel pipe is cold rolling, heat treatment, finishing (aligning, Pipe Cutting, pickling etc.) operation are implemented with reference to common austenitic stainless steel production technology, and implementation process is smooth, and end properties is qualified, the influence to environmental protection and secure context do not occur.
Table 5 technical scheme three and effect
| Piercing temperature ℃ | Deflection % | Linear velocity m/s | Cooling method | The perforation quality | End properties |
| 1100 | 68 | 1.7 | Adopt | The surface flawless | Qualified |
Embodiment 4
Connect on the push rod 8 of top 2 place, nearly top and bore one oblique (direction towards the top) aperture 7, the aperture is 3mm, with push rod 8 axial angles be 45 °, the interior cooling water pressure of hollow push rod is 0.2MPa, other are with embodiment 1.
Embodiment 5
Connect on the push rod 8 of top 2 place, nearly top and bore one oblique (direction towards the top) aperture 7, the aperture is 5mm, with push rod 8 axial angles be 60 °, the interior cooling water pressure of hollow push rod is 0.4MPa, other are with embodiment 1.
Embodiment 6
Connect on the push rod 8 of top 2 place, nearly top and bore one oblique (direction towards the top) aperture 7, the aperture is 7mm, with push rod 8 axial angles be 30 °, the interior cooling water pressure of hollow push rod is 0.3MPa, other are with embodiment 2.
Through above-mentioned embodiment, whole year production in 2010 86.630 tons of 1Cr25Ni20Si2 seamless pipes, product surface quality, finished product mechanical property meet the product technology requirement, have favorable economic benefit and social benefit.
Claims (8)
1. the preparation method of a heat-resistance stainless steel seamless pipe comprises perforation process and refrigerating work procedure, it is characterized in that: in said perforation process, and roll piercing during hot-puncturing process, pipe is done screw, and punching rate is controlled at 1.4-1.8m/s.
2. the preparation method of heat-resistance stainless steel seamless pipe according to claim 1 is characterized in that: an oblique aperture bores towards coming directly towards direction in place, nearly top on the push rod of connection top.
3. the preparation method of heat-resistance stainless steel seamless pipe according to claim 1 is characterized in that: said aperture and ejector rob axis are 45-60 ° to angle.
4. the preparation method of heat-resistance stainless steel seamless pipe according to claim 1 is characterized in that: the aperture of said aperture is 3-5mm.
5. the preparation method of heat-resistance stainless steel seamless pipe according to claim 1 is characterized in that: cooling water flow is through hollow push rod in the said refrigerating work procedure; The pressure of said cooling water is 0.2-0.4MPa.
6. according to the preparation method of claim 2 or 5 described heat-resistance stainless steel seamless pipes, it is characterized in that: the cooling water of said hollow push rod cools off top and hollow billet through aperture.
7. the preparation method of heat-resistance stainless steel seamless pipe according to claim 1 is characterized in that: said piercing temperature is controlled at 1070-1110 ℃.
8. the preparation method of heat-resistance stainless steel seamless pipe according to claim 1 is characterized in that: said perforation deflection is controlled at 60-68%.
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| CN2011101378095A CN102794305A (en) | 2011-05-25 | 2011-05-25 | Method for preparing heat-resistance stainless steel seamless tube |
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| CN2011101378095A CN102794305A (en) | 2011-05-25 | 2011-05-25 | Method for preparing heat-resistance stainless steel seamless tube |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105921524A (en) * | 2016-05-11 | 2016-09-07 | 天津钢管集团股份有限公司 | Controlled rolling method in seamless pipe hot rolling process |
| CN109092909A (en) * | 2018-08-13 | 2018-12-28 | 林州凤宝管业有限公司 | Spiral shell and the process of speed-raising inside and outside a kind of elimination double ruler of thin-wall tube |
| CN113976628A (en) * | 2021-11-08 | 2022-01-28 | 中冶东方工程技术有限公司 | Production process and device of stainless steel seamless steel pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61219404A (en) * | 1985-03-26 | 1986-09-29 | Sumitomo Metal Ind Ltd | Piercing mill |
| JPS6224805A (en) * | 1985-07-23 | 1987-02-02 | Sumitomo Metal Ind Ltd | Rolling method for piercing |
| JPH09108712A (en) * | 1995-10-24 | 1997-04-28 | Kawasaki Steel Corp | Rolling method of seamless steel tube by inclined rolling mill |
| CN1676272A (en) * | 2005-04-18 | 2005-10-05 | 宝钢集团上海五钢有限公司 | OOCr22Ni5MO3N high-nitrogen steel seamless steel pipe manufacturing method |
| CN101020190A (en) * | 2007-03-21 | 2007-08-22 | 中冶东方工程技术有限公司 | Hot rolling process of seamless steel pipe |
-
2011
- 2011-05-25 CN CN2011101378095A patent/CN102794305A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61219404A (en) * | 1985-03-26 | 1986-09-29 | Sumitomo Metal Ind Ltd | Piercing mill |
| JPS6224805A (en) * | 1985-07-23 | 1987-02-02 | Sumitomo Metal Ind Ltd | Rolling method for piercing |
| JPH09108712A (en) * | 1995-10-24 | 1997-04-28 | Kawasaki Steel Corp | Rolling method of seamless steel tube by inclined rolling mill |
| CN1676272A (en) * | 2005-04-18 | 2005-10-05 | 宝钢集团上海五钢有限公司 | OOCr22Ni5MO3N high-nitrogen steel seamless steel pipe manufacturing method |
| CN101020190A (en) * | 2007-03-21 | 2007-08-22 | 中冶东方工程技术有限公司 | Hot rolling process of seamless steel pipe |
Non-Patent Citations (2)
| Title |
|---|
| 唐正义: ""1Cr25Ni20Si2耐热不锈钢管的试制"", 《钢管》, vol. 26, no. 2, 30 April 1997 (1997-04-30), pages 43 - 46 * |
| 钟倩霞等: ""1Cr25Ni20Si2耐热合金钢管的试制"", 《钢管》, vol. 27, no. 12, 31 December 1992 (1992-12-31), pages 38 - 41 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105921524A (en) * | 2016-05-11 | 2016-09-07 | 天津钢管集团股份有限公司 | Controlled rolling method in seamless pipe hot rolling process |
| CN109092909A (en) * | 2018-08-13 | 2018-12-28 | 林州凤宝管业有限公司 | Spiral shell and the process of speed-raising inside and outside a kind of elimination double ruler of thin-wall tube |
| CN113976628A (en) * | 2021-11-08 | 2022-01-28 | 中冶东方工程技术有限公司 | Production process and device of stainless steel seamless steel pipe |
| CN113976628B (en) * | 2021-11-08 | 2024-05-28 | 中冶东方工程技术有限公司 | Production process and device of stainless steel seamless steel tube |
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Application publication date: 20121128 |