CN107686880A - A kind of steel pipe welding joint heat treatment method - Google Patents
A kind of steel pipe welding joint heat treatment method Download PDFInfo
- Publication number
- CN107686880A CN107686880A CN201711018918.9A CN201711018918A CN107686880A CN 107686880 A CN107686880 A CN 107686880A CN 201711018918 A CN201711018918 A CN 201711018918A CN 107686880 A CN107686880 A CN 107686880A
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- CN
- China
- Prior art keywords
- steel pipe
- heat treatment
- pipe welding
- welding joint
- treatment method
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a kind of steel pipe welding joint heat treatment method, it is characterised in that：Carry out in the steps below：1. steel pipe welding joint is put into vacuum heat treatment furnace and is warming up to 950~1000 DEG C with stove, 1~2h is incubated；2. the steel pipe welding joint that welding is obtained once is cooled to 370 380 DEG C, the steel pipe welding joint after once cooling down is heated to 850 855 DEG C, then carries out secondary cooling to 250 260 DEG C, 2 3h is incubated, is then air-cooled to room temperature.
Description
Technical field
The present invention relates to a kind of steel pipe welding joint, particularly a kind of steel pipe welding joint heat treatment method.
Background technology
Alloy has good welding performance, can use electron beam weldering, Laser Welding, diffusion welding (DW), linear friction welding, argon arc
A variety of methods such as weldering are welded, and the intensity of postwelding welding point can reach required requirement.But in order to eliminate to antifatigue
The postwelding residual stress unfavorable with corrosion resistance needs Welded Joints to carry out post weld heat treatment, and Technology for Heating Processing is carried out after welding
Optimization can make the strength level that the welding point after heat treatment and the welding point before heat treatment maintain like substantially, certain
The combination property of welding point is improved in degree.However, conventional Technology for Heating Processing is relatively simple, deposited on performance improvement
In limitation.
The content of the invention
It is an object of the present invention to provide a kind of steel pipe welding joint heat treatment method.Welding quality stable of the present invention, has
Preferable tensile property and impact property.
Technical scheme：A kind of steel pipe welding joint heat treatment method, it is characterised in that：Carry out in the steps below：
1. steel pipe welding joint is put into vacuum heat treatment furnace and is warming up to 950~1000 DEG C with stove, 1~2h is incubated；
2. the steel pipe welding joint that welding is obtained once is cooled to 370-380 DEG C, by the steel pipe welding after once cooling down
Joint is heated to 850-855 DEG C, then carries out secondary cooling to 250-260 DEG C, is incubated 2-3h, is then air-cooled to room temperature.
In foregoing steel pipe welding joint heat treatment method, vacuum work pressure range is 6.0 in the vacuum heat treatment furnace
×10-2Pa-6.5×10-2Pa。
Compared with prior art, the present invention has been obtained using stable and property by optimizing each stage process step and parameter
Can preferably welding point.The present invention is improved the mechanical property and toughness of weld seam, simplified by every rational parameter combination
Processing step, reduce production cost.The present invention has simple and easy, available for industrial mass manufacture, is given birth to suitable for large-scale industrial
The needs of production, there is higher engineering application value, it, which puts goods on the market, will produce significantly Social benefit and economic benefit.
Embodiment
With reference to embodiment, the present invention is further illustrated, but is not intended as the foundation limited the present invention.
Embodiment.A kind of steel pipe welding joint heat treatment method, it is characterised in that：Carry out in the steps below：
1. steel pipe welding joint is put into vacuum heat treatment furnace and is warming up to 950~1000 DEG C with stove, 1~2h is incubated；
2. the steel pipe welding joint that welding is obtained once is cooled to 370-380 DEG C, by the steel pipe welding after once cooling down
Joint is heated to 850-855 DEG C, then carries out secondary cooling to 250-260 DEG C, is incubated 2-3h, is then air-cooled to room temperature.
Vacuum work pressure range is 6.0 × 10 in the vacuum heat treatment furnace-2Pa-6.5×10-2Pa。
The present invention has obtained connecing using stable preferably weld with performance by optimizing each stage process step and parameter
Head.The present invention is improved the mechanical property and toughness of weld seam, simplifies processing step, reduced by every rational parameter combination
Production cost.The present invention have it is simple and easy, available for industrial mass manufacture, suitable for the needs of scale industrial production, have
Higher engineering application value, it, which puts goods on the market, will produce significantly Social benefit and economic benefit.
Claims (2)
- A kind of 1. steel pipe welding joint heat treatment method, it is characterised in that：Carry out in the steps below：1. steel pipe welding joint is put into vacuum heat treatment furnace and is warming up to 950~1000 DEG C with stove, 1~2h is incubated；2. the steel pipe welding joint that welding is obtained once is cooled to 370-380 DEG C, by the steel pipe welding joint after once cooling down 850-855 DEG C is heated to, then carries out secondary cooling to 250-260 DEG C, 2-3h is incubated, is then air-cooled to room temperature.
- 2. steel pipe welding joint heat treatment method according to claim 1, it is characterised in that：It is true in the vacuum heat treatment furnace Empty operating pressure scope is 6.0 × 10-2Pa-6.5×10-2Pa。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711018918.9A CN107686880A (en) | 2017-10-27 | 2017-10-27 | A kind of steel pipe welding joint heat treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711018918.9A CN107686880A (en) | 2017-10-27 | 2017-10-27 | A kind of steel pipe welding joint heat treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107686880A true CN107686880A (en) | 2018-02-13 |
Family
ID=61153927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711018918.9A Withdrawn CN107686880A (en) | 2017-10-27 | 2017-10-27 | A kind of steel pipe welding joint heat treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107686880A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266282A (en) * | 2013-05-28 | 2013-08-28 | 宝山钢铁股份有限公司 | L415MB steel grade high frequency longitudinal welded pipe and manufacturing method thereof |
| CN103898310A (en) * | 2014-04-04 | 2014-07-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Postweld heat treatment method of welded joint of bainite steel rail |
-
2017
- 2017-10-27 CN CN201711018918.9A patent/CN107686880A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266282A (en) * | 2013-05-28 | 2013-08-28 | 宝山钢铁股份有限公司 | L415MB steel grade high frequency longitudinal welded pipe and manufacturing method thereof |
| CN103898310A (en) * | 2014-04-04 | 2014-07-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Postweld heat treatment method of welded joint of bainite steel rail |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180213 |
|
| WW01 | Invention patent application withdrawn after publication |