CN114908234A - Heat treatment process of welded and drawn pipe for drilling - Google Patents
Heat treatment process of welded and drawn pipe for drilling Download PDFInfo
- Publication number
- CN114908234A CN114908234A CN202210523598.7A CN202210523598A CN114908234A CN 114908234 A CN114908234 A CN 114908234A CN 202210523598 A CN202210523598 A CN 202210523598A CN 114908234 A CN114908234 A CN 114908234A
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- CN
- China
- Prior art keywords
- welded
- heat treatment
- pipe
- drilling
- treatment process
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/30—Stress-relieving
-
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention discloses a heat treatment process of a welded and drawn pipe for drilling, which comprises the following specific steps of: step one, adopting a welded pipe as a base material, and carrying out cold-drawing deformation; and step two, performing low-temperature stress relief annealing on the product through a box type electric furnace. The welded and drawn pipe treated by the heat treatment process has the hardness of HRC22-25 and the tensile strength of more than 800Mpa, and can meet the final performance requirement while eliminating the residual stress after cold-drawing deformation; replace imported welded pipe, reduce the purchase cost of the welding and drawing pipe for drilling.
Description
Technical Field
The invention relates to the technical field of welding and drawing pipes for drilling, in particular to a heat treatment process of a welding and drawing pipe for drilling.
Background
At present, most of drill rods adopted in the domestic drilling industry are manufactured by adopting seamless steel pipes, and the drill rods are replaced by imported welded pipes under severe drilling working condition conditions and the drilling depth of more than 600 meters, and the main factors are that the domestic welded and drawn pipes cannot meet the severe working condition conditions of drilling in performance, and have strict requirements on the steel pipes: the hardness HRC needs to be stabilized at 22-25, the tensile strength needs to be more than 800Mpa, the torsion test meets the requirement that no fracture occurs under 1000Mpa, the grain size is 8-9 grade, however, the cost of an imported welded pipe is high, the lead cycle is long, and the drilling efficiency is influenced.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide a heat treatment process of a welded and drawn pipe for drilling, and solve the problem of poor welded and drawn pipe performance in China.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a heat treatment process of a welded and drawn pipe for drilling, which comprises the following specific steps of:
step one, adopting a welded pipe as a base material, and carrying out cold-drawing deformation;
and step two, performing low-temperature stress relief annealing on the product through a box type electric furnace.
Preferably, in the step one, the base metal welded pipe is subjected to grain refinement through anaerobic heat treatment during cold drawing deformation, so that the base metal of the welded pipe is ensured to obtain uniform metallographic structure and stable performance at first during cold drawing deformation.
Preferably, the anaerobic heat treatment temperature of the base metal welding material is 860 ℃, and the heat preservation time is 50 min.
Preferably, in the second step, the annealing temperature is 420 ℃, and the temperature is kept for 300 min.
The invention has the beneficial effects that: the welded and drawn pipe treated by the heat treatment process has the hardness of HRC22-25 and the tensile strength of more than 800Mpa, and can meet the final performance requirement while eliminating the residual stress after cold-drawing deformation; replace imported welded pipe, reduce the purchase cost of the welding and drawing pipe for drilling.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1, a heat treatment process of a welded and drawn pipe for drilling, comprising the following specific steps:
step one, adopting a welded pipe as a base material, and carrying out cold-drawing deformation;
and step two, performing low-temperature stress relief annealing on the product through a box type electric furnace.
Further, in the first step, grain refinement is carried out on the base metal welded pipe through anaerobic heat treatment during cold drawing deformation, so that the base metal of the welded pipe is ensured to obtain uniform metallographic structure and stable performance firstly during cold drawing deformation.
Further, the anaerobic heat treatment temperature of the base metal welding material is 860 ℃, and the heat preservation time is 50 min.
Further, in the second step, the annealing temperature is 420 ℃, and the temperature is kept for 300 min.
The welded and drawn pipe treated by the heat treatment process has the hardness of HRC22-25 and the tensile strength of more than 800Mpa, and can meet the final performance requirement while eliminating the residual stress after cold-drawing deformation; replace imported welded pipe, reduce the purchase cost of the welding and drawing pipe for drilling.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. A heat treatment process for a welded and drawn pipe for drilling is characterized by comprising the following specific steps:
step one, adopting a welded pipe as a base material, and carrying out cold-drawing deformation;
and step two, performing low-temperature stress relief annealing on the product through a box type electric furnace.
2. The heat treatment process of a welded and drawn pipe for drilling as claimed in claim 1, wherein in said step one, the welded pipe of the base material is subjected to grain refinement by anaerobic heat treatment during cold drawing deformation, so as to ensure that the base material of the welded pipe is firstly homogeneous in metallographic structure and stable in performance during cold drawing deformation.
3. The heat treatment process of a welded and drawn pipe for drilling according to claim 2, wherein the oxygen-free heat treatment temperature of the base metal welding material is 860 ℃ and the holding time is 50 min.
4. The heat treatment process of the welded and drawn pipe for drilling as claimed in claim 1, wherein in the second step, the annealing temperature is 420 ℃ and the temperature is kept for 300 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210523598.7A CN114908234A (en) | 2022-05-14 | 2022-05-14 | Heat treatment process of welded and drawn pipe for drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210523598.7A CN114908234A (en) | 2022-05-14 | 2022-05-14 | Heat treatment process of welded and drawn pipe for drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114908234A true CN114908234A (en) | 2022-08-16 |
Family
ID=82767661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210523598.7A Pending CN114908234A (en) | 2022-05-14 | 2022-05-14 | Heat treatment process of welded and drawn pipe for drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114908234A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115976402A (en) * | 2022-11-23 | 2023-04-18 | 江苏建中新材料科技有限公司 | Welded drawing pipe for hollow spiral spring of passenger car and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110232810A1 (en) * | 2010-03-23 | 2011-09-29 | Nhk Spring Co., Ltd. | Method for heat treatment of coiled spring |
| CN103624095A (en) * | 2013-11-21 | 2014-03-12 | 中国钢研科技集团有限公司 | Production process of precise cold-drawn steel pipe |
| CN113477734A (en) * | 2021-07-28 | 2021-10-08 | 宜昌中南精密钢管有限公司 | High-precision and high-strength ultrathin stainless steel pipe rectangular pipe forming die and cold drawing method |
-
2022
- 2022-05-14 CN CN202210523598.7A patent/CN114908234A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110232810A1 (en) * | 2010-03-23 | 2011-09-29 | Nhk Spring Co., Ltd. | Method for heat treatment of coiled spring |
| CN103624095A (en) * | 2013-11-21 | 2014-03-12 | 中国钢研科技集团有限公司 | Production process of precise cold-drawn steel pipe |
| CN113477734A (en) * | 2021-07-28 | 2021-10-08 | 宜昌中南精密钢管有限公司 | High-precision and high-strength ultrathin stainless steel pipe rectangular pipe forming die and cold drawing method |
Non-Patent Citations (1)
| Title |
|---|
| 康继: "我国液压缸缸筒用冷拔高频直缝焊管生产工艺技术研究", 《液压气动与密封》, vol. 37, no. 7, pages 119 - 120 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115976402A (en) * | 2022-11-23 | 2023-04-18 | 江苏建中新材料科技有限公司 | Welded drawing pipe for hollow spiral spring of passenger car and preparation method thereof |
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