CN104651585A - Heat treatment technology for metals - Google Patents
Heat treatment technology for metals Download PDFInfo
- Publication number
- CN104651585A CN104651585A CN201310577782.0A CN201310577782A CN104651585A CN 104651585 A CN104651585 A CN 104651585A CN 201310577782 A CN201310577782 A CN 201310577782A CN 104651585 A CN104651585 A CN 104651585A
- Authority
- CN
- China
- Prior art keywords
- drill pipe
- pipe joint
- heat treatment
- tempering
- treatment technology
- 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.)
- Pending
Links
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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
-
- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
Abstract
The invention provides a heat treatment technology for metals. The heat treatment technology comprises the following steps: carrying out copper plating on a drill pipe joint, wherein the surface of the drill pipe joint has no phosphate layer, then carrying out tempering treatment, controlling tempering temperature at 630 DEG C to 680 DEG C, maintaining the temperature for 100 to 140 min, and then carrying out cooling with water to room temperature. The heat treatment technology for metals is directed at the problem of worsened comprehensive mechanical properties of the drill pipe joint due to the high hardness value of the drill pipe joint in conventional production of oil drill pipe joints; after the drill pipe joint is treated, the hardness of the treated drill pipe joint reduces to the prescribed range of HB293 to 331, the treated drill pipe joint is prevented from joint thread tooth deformation and surface decarburization; thus, the requirement for thread standoff is met, the qualification rate of products is improved and remarkable benefits are obtained.
Description
Technical field
The present invention relates to a kind of metal heat treatmet technology, particularly for the higher treatment process carrying out correcting of joint of petroleum drill rod hardness value.Belong to technical field of metal heat treatment.
Background technology
Oil production be unable to do without oil drill rocker, and oil drill rocker is made up of drill pipe sub and drill pipe body.The material of drill pipe sub is generally 4137H (37CrMnMo), and by Mechanical Property Analysis, when hardness value changes within the scope of HB293-331, along with the raising of hardness value, tensile strength, yield strength, Charpy-V impact power increase; When hardness value is greater than HB331, tensile strength improves, but yield strength and Charpy-V impact power decline.When hardness value is too high, comprehensive mechanical performance index declines, and joint plasticity declines, and easily ruptures, only has comprehensive mechanical performance height just can be applicable to underground drilling.During existing drill pipe sub is produced, often hardness value is higher, and traditional treatment process one is scrapped, and two is carry out temper.Joint is directly carried out temper, although can hardness be reduced, brings new problem to be that on joint, screw thread tooth is easily out of shape, and joint surface can produce Decarburized layer, cause joint screw thread compact distance defective, the finished product or defective, cause heavy losses.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of metal heat treatmet technology, namely not only can reduce higher hardness value, and can ensure Thread standoff requirement, thus the metal heat treatmet technology that the joint of petroleum drill rod hardness value improving conforming product rate is higher.
Technical scheme of the present invention is: first to screw thread and the trim electro-coppering of drill pipe sub, then drill pipe sub is lifted up in tempering stove and carry out tempering, and controlling tempering temperature is 630 DEG C one 680 DEG C, and insulation 100-140min, hangs out subsequently and be water-cooled to normal temperature.
In such scheme, during to drill pipe sub tempering, preferred tempering temperature 650 DEG C, insulation 120min.
Because of the density of fine copper and thermal conductivity higher than iron, after the screw thread and trim plating fine copper of joint, the provide protection of close coating can be played; and strengthen thermal conduction, screw thread tooth so just can be prevented to be out of shape, can not surface-carburized layer to be produced; thus ensure Thread standoff requirement, improve conforming product rate.Adopt treatment process of the present invention, be the financial loss that joint manufacturing enterprise retrieves millions of unit every year, meet export requirement, obtain coml immense success.
Embodiment
By the drill pipe sub of surface without phosphate coating, material 4137H (37CrMnMo), hardness value is greater than HB331, puts in copper-bath plating tank, technique routinely, makes joint screw thread and trim position plate one deck fine copper; Then lifted up in tempering stove by joint and carry out tempering, controlling tempering temperature is 650 DEG C, and insulation 120min, hangs out subsequently and be water-cooled to normal temperature.
Through above process, the hardness value of drill pipe sub is in the scope of HB293 ~ 331, and comprehensive mechanical performance is high, and can not produce the distortion of joint screw thread tooth and surface decarburization phenomenon.
Claims (2)
1. a metal heat treatmet technology, is characterized in that first to screw thread and the trim electro-coppering of drill pipe sub, then drill pipe sub is lifted up in tempering stove and carry out tempering, and controlling tempering temperature is 630 DEG C-680 DEG C, and insulation 100 ~ 140min, hangs out subsequently and be water-cooled to normal temperature.
2. by a kind of metal heat treatmet technology according to claim 1, when it is characterized in that drill pipe sub tempering, preferred tempering temperature 65 0 DEG C, insulation 120min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310577782.0A CN104651585A (en) | 2013-11-19 | 2013-11-19 | Heat treatment technology for metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310577782.0A CN104651585A (en) | 2013-11-19 | 2013-11-19 | Heat treatment technology for metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104651585A true CN104651585A (en) | 2015-05-27 |
Family
ID=53243222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310577782.0A Pending CN104651585A (en) | 2013-11-19 | 2013-11-19 | Heat treatment technology for metals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104651585A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107511645A (en) * | 2017-09-29 | 2017-12-26 | 宝鸡市永盛泰钛业有限公司 | A kind of oil drill rocker machining manufacture |
| CN115449604A (en) * | 2022-09-21 | 2022-12-09 | 无锡双马钻探工具有限公司 | Non-excavation integral drill rod processing technology |
-
2013
- 2013-11-19 CN CN201310577782.0A patent/CN104651585A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107511645A (en) * | 2017-09-29 | 2017-12-26 | 宝鸡市永盛泰钛业有限公司 | A kind of oil drill rocker machining manufacture |
| CN115449604A (en) * | 2022-09-21 | 2022-12-09 | 无锡双马钻探工具有限公司 | Non-excavation integral drill rod processing technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |