CN1532007A - New process for producing high alloy deformed seamless pipe - Google Patents
New process for producing high alloy deformed seamless pipe Download PDFInfo
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- CN1532007A CN1532007A CNA031112021A CN03111202A CN1532007A CN 1532007 A CN1532007 A CN 1532007A CN A031112021 A CNA031112021 A CN A031112021A CN 03111202 A CN03111202 A CN 03111202A CN 1532007 A CN1532007 A CN 1532007A
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Abstract
The present invention relates to production technology of seamless steel pipe, and is especially new technological process of preparing high alloy deformed seamless pipe. The technological path includes centrifugally casting alloy pipe blank, outer turning and inner boring, proper heat treatment and direct cold rolling. The technological process includes the following steps: centrifugal casing of pipe blank at 1650-1700 deg.c and 1000-1200 rpm; homogeneous annealing of the pipe blank at 1100-1200 deg.c for 1.5-3.5 hr and cooling; and machining including turning outside and boring inside; and cold rolling for at least twice and middle annealing at 1100-1180 deg.c, with the first cold rolling having deformation controlled within 30-40%. The present invention has the features of high yield, high performance and short process.
Description
Technical field
The present invention relates to the production technology of seamless steel pipe, specifically a kind of preparation high alloy distortion seamless tubular goods new technology.
Background technology
In the prior art, adopt ingot casting, forging, rolling pipe, roll piercing prepares hollow forging, Rolling Production alloy seamless pipe.Some steel grade has good serviceability, but because hot-working character is poor, makes the lumber recovery of producing seamless steel pipe very low.For example, the 0Cr17Mn14Mo2N two phase stainless steel has excellent serviceability, yet its thermoplasticity is poor, and resistance of deformation is big, and lumber recovery has only about 20%.And existing tube-making technology long flow path.
Summary of the invention
The object of the invention provides a kind of lumber recovery height, the short preparation high alloy distortion seamless tubular goods new technology of flow process.
Technical solution of the present invention is: adopt the centrifugal casting alloy pipe stock, boring in the outer car is produced the technology path of seamless steel pipe through direct cold rolling after the proper heat treatment, and concrete operations can be as follows:
1) centrifugal casting: cast under 1650 ℃～1700 ℃ temperature, centrifugal rotational speed is controlled at 1000 rev/mins～1200 rev/mins, gets pipe;
2) homogenizing annealing: after the centrifugal casting pipe, pipe is carried out homogenizing annealing under 1100 ℃～1200 ℃ situations, be incubated 1.5～3.5 hours, cooling;
3) cold working: the outer car of blank, interior boring;
4) cold rolling: to the blank after the described cold working cold rolling at least 2 times (according to finished sizes), intermediate annealing under 1100 ℃～1180 ℃ temperature; Wherein first passage is cold rolling, and the control cold rolling reduction is in 30%～40% scope.
During for the stainless steel pipe in step 2) homogenizing annealing be to adopt the solution treatment mode, 1100 ℃～1200 ℃ of treatment temperatures be incubateds after 1.5～3.5 hours and cool off fast.
Compared with prior art, the present invention has following advantage:
1. technology of the present invention is owing to adopt the centrifugal casting pipe, and cold rolling production seamless pipe has been avoided hot procedure, so that the steel grade seamless tubular goods production of thermoplasticity difference becomes possibility; Owing to avoided operations such as ingot casting, forging and hot piercing, technological process is short, so reduced operating cost; Controlled technological parameters such as cold rolling reduction and heat treatment in process of production effectively, the seamless tubular goods that high alloy is difficult to thermal deformation has higher lumber recovery; This explained hereafter seamless tubular goods is quick and easy.
2. the present invention is specially adapted to the production of the steel grade seamless tubular goods of thermal deformation behavior difference.
The specific embodiment
Embodiment 1
The cold rolling method of cast tube is produced Φ 25 * 2.5mm 0Cr17Mn14Mo2N seamless two-phase stainless-steel pipe.
1. intermediate frequency is smelted the 0Cr17Mn14Mo2N two phase stainless steel, and 1650 ℃ of casting, centrifugal rotational speed is at 1000 rev/mins, cast blank size, Φ 95 * 12mm;
2. pipe is in 1120 ℃ of insulations 1.5 hours, shrend;
3. the outer car of blank, interior boring, smart base size is about: Φ 93 * 8mm;
4. cold rolling: adopt cold pilger mill cold rolling 4 times, wherein first passage is cold rolling, and Φ 93 * 8mm is rolled down to size Φ 76 * 6.5mm, and the cold deformation amount is about 35%;
Under 1100 ℃ temperature, anneal;
Φ 76 * 6.5mm is rolled down to size Φ 57 * 4.5mm;
Under 1100 ℃ temperature, anneal;
Φ 57 * 4.5mm is rolled down to size Φ 38 * 3.5mm;
Under 1100 ℃ temperature, anneal;
Φ 38 * 3.5mm is rolled down to size Φ 25 * 2.5mm;
Solution treatment under 1050 ℃ temperature before the delivery.
The result: the present embodiment lumber recovery is up to 65%.
Embodiment 2
Difference from Example 1 is: material is the 0Cr25Ni20Si2 heat-resistance stainless steel.
1) cast under 1680 ℃ of temperature, centrifugal rotational speed is 1100 rev/mins, cast blank size, Φ 75 * 10mm;
2) in step 2) homogenizing annealing adopt the solution treatment mode, 1100 ℃ of treatment temperatures are incubated 2.5 hours, the shrend mode is cooled off;
3) boring obtains pipe in the outer car: Φ 72 * 7mm;
4) adopt cold pilger mill cold rolling 4 times, first passage is rolling: Φ 72 * 7mm is rolled down to size Φ 57 * 5.5mm, and the cold deformation amount is about 38%;
Below each operation identical with embodiment 1.
Because the work hardening of 0Cr25Ni20Si2 heat-resistance stainless steel is not obvious, adopts this flow process lumber recovery to obtain 72%.
Embodiment 3
Difference from Example 1 is: material is the 00Cr22Ni5Mo3N two phase stainless steel.
Intermediate frequency is smelted the 00Cr22Ni5Mo3N two phase stainless steel, and then external refining, reduces the content of carbon;
The cast blank size, Φ 105 * 12mm;
Wherein: step 2) pipe is in 1200 ℃ of insulations 3.5 hours, shrend;
3) boring obtains pipe in the outer car: Φ 100 * 8mm;
4) first passage is rolling: Φ 100 * 8mm is rolled down to size Φ 87 * 6.0mm, and the cold deformation amount is about 34%; Intermediate annealing is all carried out under 1160 ℃ of situations; Second passage is rolling: Φ 87 * 6mm is rolled down to size Φ 57 * 4.5mm, and the cold deformation amount is about 50%; Solution treatment under 1100 ℃ temperature before the delivery.
This explained hereafter 00Cr22Ni5Mo3N seamless two-phase stainless-steel pipe material, lumber recovery has obtained 71%.
Embodiment 4
Difference from Example 1 is: material is the NS333 corrosion resistant alloy.
In step 2) homogenizing annealing, 1180 ℃ of treatment temperatures are incubated 2.5 hours, air cooling;
Annealing between rolling pass is all at 1150 ℃; Adopt solution treatment before the delivery, 1100 ℃ of treatment temperatures are incubated 2 hours, shrend.
Its result: lumber recovery reaches 65%.
Claims (2)
1. one kind prepares high alloy distortion seamless tubular goods new technology, it is characterized in that: boring in the centrifugal casting alloy pipe stock, outer car, produce seamless steel pipe through direct cold rolling after the proper heat treatment, and concrete operations can be as follows:
1) centrifugal casting: cast under 1650 ℃～1700 ℃ temperature, centrifugal rotational speed is controlled at 1000 rev/mins～1200 rev/mins, gets pipe;
2) homogenizing annealing: after the centrifugal casting pipe, pipe is carried out homogenizing annealing in 1100 ℃～1200 ℃ scopes, be incubated 1.5～3.5 hours, cooling;
3) cold working: the outer car of blank, interior boring;
4) cold rolling: to the blank after the described cold working cold rolling at least 2 times, intermediate annealing under 1100 ℃～1180 ℃ temperature; Wherein first passage is cold rolling, and the control cold rolling reduction is in 30%～40% scope.
2. according to the described preparation high alloy distortion of claim 1 seamless tubular goods new technology, it is characterized in that: homogenizing annealing step 2 during for the stainless steel pipe) adopts the solution treatment mode, 1100 ℃～1200 ℃ of treatment temperatures are incubated cooling fast after 1.5～3.5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031112021A CN1532007A (en) | 2003-03-19 | 2003-03-19 | New process for producing high alloy deformed seamless pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031112021A CN1532007A (en) | 2003-03-19 | 2003-03-19 | New process for producing high alloy deformed seamless pipe |
Publications (1)
| Publication Number | Publication Date |
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| CN1532007A true CN1532007A (en) | 2004-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA031112021A Pending CN1532007A (en) | 2003-03-19 | 2003-03-19 | New process for producing high alloy deformed seamless pipe |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009030105A1 (en) * | 2007-08-30 | 2009-03-12 | Huaiwen Liu | Manufacturing technique of seamless steel pipe |
| CN102357781A (en) * | 2011-09-28 | 2012-02-22 | 陈继根 | Manufacturing process of charging barrel of plastic extruder |
| CN103128129A (en) * | 2011-11-24 | 2013-06-05 | 北京有色金属研究总院 | Short-flow preparation method of Ni-Cr-Mo corrosion-resistant alloy tube |
| CN103526130A (en) * | 2013-10-23 | 2014-01-22 | 北京科技大学 | Processing method for direct cold rolling of two-phase stainless steel as-cast state billet steel after solid solution treatment |
| CN106734327A (en) * | 2016-11-11 | 2017-05-31 | 合鸿新材科技有限公司 | A kind of moulding process of admirality brass seamless pipe |
| CN107904378A (en) * | 2017-11-21 | 2018-04-13 | 中国科学院金属研究所 | A kind of preparation method of the sealing ring stainless steel tube of high resilience energy |
-
2003
- 2003-03-19 CN CNA031112021A patent/CN1532007A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009030105A1 (en) * | 2007-08-30 | 2009-03-12 | Huaiwen Liu | Manufacturing technique of seamless steel pipe |
| CN101376204B (en) * | 2007-08-30 | 2010-07-28 | 北京首宏钢科技开发有限公司 | Novel technique for producing seamless steel pipe |
| CN102357781A (en) * | 2011-09-28 | 2012-02-22 | 陈继根 | Manufacturing process of charging barrel of plastic extruder |
| CN103128129A (en) * | 2011-11-24 | 2013-06-05 | 北京有色金属研究总院 | Short-flow preparation method of Ni-Cr-Mo corrosion-resistant alloy tube |
| CN103526130A (en) * | 2013-10-23 | 2014-01-22 | 北京科技大学 | Processing method for direct cold rolling of two-phase stainless steel as-cast state billet steel after solid solution treatment |
| CN106734327A (en) * | 2016-11-11 | 2017-05-31 | 合鸿新材科技有限公司 | A kind of moulding process of admirality brass seamless pipe |
| CN107904378A (en) * | 2017-11-21 | 2018-04-13 | 中国科学院金属研究所 | A kind of preparation method of the sealing ring stainless steel tube of high resilience energy |
| CN107904378B (en) * | 2017-11-21 | 2021-10-22 | 中国科学院金属研究所 | Preparation method of stainless steel pipe with high resilience for sealing ring |
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