CN105219944B - A kind of drilling rod is molded the heat treatment method of weld seam - Google Patents
A kind of drilling rod is molded the heat treatment method of weld seam Download PDFInfo
- Publication number
- CN105219944B CN105219944B CN201510726979.5A CN201510726979A CN105219944B CN 105219944 B CN105219944 B CN 105219944B CN 201510726979 A CN201510726979 A CN 201510726979A CN 105219944 B CN105219944 B CN 105219944B
- Authority
- CN
- China
- Prior art keywords
- drilling rod
- weld seam
- heat treatment
- treatment method
- molded
- 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.)
- Active
Links
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The present invention proposes the heat treatment method that a kind of drilling rod is molded weld seam, comprises the following steps：First, the weld metal zone rubbed weldering between drill pipe body and joint formed is made annealing treatment；Then, the drilling rod after annealing is put into air and cooled down, until being cooled to room temperature；Finally, the drilling rod after cooling is subjected to temper.The heat treatment method of the present invention, due to foring tempered sorbite so that the tissue at drill stem welding seam is thinner, thoroughly solves the problem of crackle occurs in macaroni commissure.
Description
Technical field
The heat treatment side of weld seam is molded the present invention relates to the technical field of heat treatment of ferrous materials, more particularly to a kind of drilling rod
Method.
Background technology
At present, body and joint are mainly carried out shaping weld seam by the shaping of drilling rod by friction welding technological.Rub welder
The general flow of skill is：Joint test → body appearance test → body nondestructive testing → tube end maching → inertia friction weld →
Stress relief annealing → overlap processing → quenching → tempering → welding zone inspection → finished product drilling rod weighs, surveys length → welding wear-resistant strip → mark
Know, pack, deliver.
In the prior art, generally it is using the drilling rod for producing outer tube diameter as 88.9mm, 101.6mm, 127mm, 139.7mm
It is main, it is required to thicken for the drill pipe body end of welding, upset end wall thickness is between 12.01mm-24.62mm.Drilling rod is welded
Heat treatment is using annealing, quenching, tempering process afterwards.To macaroni, for example, external diameter is less than less than 88.9mm upset end wall thickness
When 19.05mm drilling rod is quenched, because tube wall is too thin at drill stem welding seam and cooling velocity is too fast, its commissure it is instantaneous in
Stress exceedes the fracture strength of the steel, easily occurs heat treatment crack.
In order to solve the above problems, generally quenching liquid concentration is improved to 7% in existing Technology for Heating Processing, still, because
Macaroni upset end tube wall is too thin, and cooling velocity difference is big inside and outside body, and surface is in compression, and center portion is in tension, appearance
More than its tensile strength heat treatment crack still easily occurs for maximum tension stress.I.e. quenching liquid concentration is improved to 7% by 3%, not to disappearing
Except the effect that shaping weld seam has been brought, so relying solely on raising quenching liquid concentration can not fundamentally solve macaroni weldering
The crack problem of seam.
Accordingly, it would be desirable to which a kind of Technology for Heating Processing is to solve in macaroni friction welding (FW) production process easily to produce asking for crack
Topic.
The content of the invention
In order to solve above-mentioned all or part of technical problem, the invention provides the heat treatment side that a kind of drilling rod is molded weld seam
Method, comprises the following steps：First, the weld metal zone rubbed weldering between drill pipe body and joint formed is made annealing treatment；
Then, by the air cooling at room temperature of the drilling rod after annealing, until being cooled to room temperature；Finally, the drilling rod after cooling is carried out at tempering
Reason.
In this case, between drill pipe body and joint after rubbed weldering, annealing and room temperature process air cooler are first carried out,
Now the tissue of commissure is changed into martensite by austenite.Through the temper under specified temp and soaking time, martensite
It is transformed into tempered sorbite.Because tempered sorbite has good toughness and plasticity, while intensity is also higher, hence in so that boring
Bar weld seam has good comprehensive mechanical property, finally ensure that the fastness connected between drill pipe body and joint.Above-mentioned heat
Processing method be particularly suitable for use in external diameter less than 88.9mm upset ends wall thickness be less than 19.05mm drilling rod.
Further, annealing temperature is 645 DEG C to 675 DEG C, and soaking time is 9s to 11s.Preferably, annealing temperature is
660 DEG C, soaking time is 10s.Thus, homogenize the metal structure of welded seam area, remove part internal stress, and be follow-up
Technology for Heating Processing is prepared.
Further, the temperature range in the room temperature process air cooler is 10 DEG C to 40 DEG C, it is preferable that be 14 DEG C.Thus,
The tissue of commissure is changed into martensite by austenite.
Further, temperature is 635 DEG C to 665 DEG C, and soaking time is 80s to 100s.Preferably, temperature is
650 DEG C, soaking time is 90s.Thus, martensite transfor mation is into tempered sorbite.
Further, the heating stepses with being tempered of annealing are carried out in the Medium frequency induction coil of Intermediate Frequency Induction Heating Equipment.
Thus, drilling rod shaping commissure can obtain more uniformly heating.
Further, the step of also including carrying out overlap processing to weld seam between annealing and cooling step.
Further, drilling rod external diameter is less than 88.9mm, and drill pipe body upset end wall thickness is less than 19.05mm.Preferably, drilling rod
External diameter is 60.32mm, and drill pipe body upset end wall thickness is 10.68mm.
Further, the heat treatment method of drilling rod shaping weld seam also includes carrying out performance test to the drilling rod after heat treatment
Step.For example, tensile property test, impact property test, bending property test and hardness performance test.Thus, it is possible to examine
Survey and evaluate the mechanical performance of macaroni.
The advantage of the invention is that：(1) drill stem welding seam that the heat treatment method through the present invention is treated so that inside weld seam
Dislocation in tissue is largely eliminated, and metal structure reaches or close to poised state so that drilling rod has good performance.
(2) quenching Step is replaced by room temperature air cooling step, cooling procedure compares mitigation, it is to avoid make because of quick cooling in quenching process
Thermograde and internal stress are produced in drilling rod so that the tissue at drill stem welding seam is thinner, thoroughly solves macaroni commissure and goes out
The problem of existing crackle.(3) macaroni produced using above-mentioned Technology for Heating Processing, first-time qualification rate is improved to 100% from 88%, carried
Production efficiency has been risen, and mechanical performance exceedes API standard.
Brief description of the drawings
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.Wherein：
Fig. 1 is the structural representation of the macaroni of the embodiment of the present invention；
Fig. 2 is the tensile test samples sample position schematic diagram of the macaroni of the embodiment of the present invention；
Fig. 3 is the impact test sample sampling position view of the macaroni of the embodiment of the present invention；
Fig. 4 is the bend test schematic diagram of the macaroni of the embodiment of the present invention；
Fig. 5 is the hardness test specimen sample position schematic diagram of the macaroni of the embodiment of the present invention；
Table 1 is the Weld Performance survey report of the macaroni of the embodiment of the present invention.
In the accompanying drawings, identical part uses identical reference.Accompanying drawing is not according to actual ratio.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in figure 1, the structural representation of the macaroni for the embodiment of the present invention.Macaroni is by tool joint 4 and drilling rod
Body 4 ' is welded.Drill pipe body thickening part 2 is provided with one end away from tool joint 4, in one end close to tool joint 4
It is formed with welding zone 3.When drill pipe body 4 ' and tool joint 4 are welded, drill pipe body 4 ' and the contact rubbing surface of tool joint 4 can melt
A part is melted, overlap is outwardly formed, this regional extent is the signified scope of welding zone 3.Weld seam 5 be drill pipe body 4 ' and
Formed by the contact rubbing surface of tool joint 4 is consequently flowed together.Taking for macaroni weld seam mechanics sample is can also be seen that from Fig. 1
The position and direction of the sample band of position 8.
It is Φ 60.32mm to drill pipe body external diameter in the specific embodiment of the present invention, body wall thickness is
10.68mm macaroni weld seam is heat-treated.First, weld seam position is heated to 660 DEG C, insulation in Medium frequency induction coil
Made annealing treatment within 10 seconds.Afterwards, macaroni is sent on stand, overlap processing is carried out to weld seam, then in 14 DEG C of bars of room temperature
Air cooling under part is until temperature is cooled to room temperature.Afterwards, 650 DEG C, time of insulation 90 seconds are carried out to weld seam by Medium frequency induction coil
Fire processing, finally, is sent to stand air cooling.
It is Φ 70mm to drill pipe body external diameter in the specific embodiment of the present invention, body wall thickness is 12.74mm
Macaroni weld seam be heat-treated.First, weld seam position is heated to 670 DEG C in Medium frequency induction coil, insulation is entered for 10 seconds
Row annealing.Afterwards, macaroni is sent on stand, carries out overlap processing to weld seam, then under the conditions of 20 DEG C of room temperature it is empty
It is cold until temperature be cooled to room temperature.Afterwards, 640 DEG C are carried out to weld seam by Medium frequency induction coil, are incubated the temper of 90 seconds,
Finally, it is sent to stand air cooling.
It is Φ 82.8mm to drill pipe body external diameter in the specific embodiment of the present invention, body wall thickness is
18.06mm macaroni weld seam is heat-treated.First, weld seam position is heated to 650 DEG C, insulation in Medium frequency induction coil
Made annealing treatment within 10 seconds.Afterwards, macaroni is sent on stand, overlap processing is carried out to weld seam, then in 35 DEG C of bars of room temperature
Air cooling under part is until temperature is cooled to room temperature.Afterwards, 645 DEG C, time of insulation 90 seconds are carried out to weld seam by Medium frequency induction coil
Fire processing, finally, is sent to stand air cooling.
Drilling rod after being handled in above-described embodiment is subjected to performance test, including：Tensile property test, impact property are surveyed
Examination, bending property test and hardness performance test.As shown in Fig. 2 stretching style necking down 1 is across brill in tensile property test
All weld seams 5 in bar welding zone 3.As shown in figure 3, longitudinal Charpy sample 7 is in drilling rod welding zone 3 in impact property test
All weld seams 5.As shown in figure 4, the bending 150 ° counterclockwise to sample in bending property test, while curved to sample up time also pin
It is bent 150 °.As shown in figure 5, in hardness performance test, testing hardness test region 6.
The test result of Weld Performance after heat treatment is as shown in table 1, as can be seen from the results by this Technology for Heating Processing
Macaroni weld seam afterwards, performance complies fully with API standard requirement.
The Weld Performance survey report of the macaroni of table 1
Using defectoscope and magnetic powder flaw detector, respectively to the 200 macaroni weld seams and Re Chu Jing Guo this Technology for Heating Processing
The zone of influence is managed, ultrasound examination and magnetic powder inspection is carried out, exception is showed no after testing, it is all qualified.
In summary, heat treatment method of the invention eliminates quenching compared with the heat treatment method of traditional drill stem welding seam
The step of, because macaroni weld seam is in quenching cooling procedure, certain thermograde will be produced along drilling rod section, cause drilling rod
Surface and center portion there is the temperature difference.On the one hand, the presence of the temperature difference causes the thermal expansion amount of the different parts along drill stem welding seam section
Difference, and then make that between different parts internal stress will be produced.On the other hand, when the fast position of temperature drop is less than martensite transfor mation
Initial temperature Ms points when, austenite is changed into martensite, and the fast site volume of temperature drop swells.However, at a temperature of slow down
Spot temperature remain above the initial temperature Ms points of martensite transfor mation, in austenitic state constancy of volume.Drilling rod different parts
Because the difference of Volume Changes will also produce internal stress.
The Technology for Heating Processing of the present invention, after friction welding (FW) after annealing, room temperature air cooling and tempering heat treatment process, horse
Family name's body becomes tempered sorbite.Tempered sorbite has good toughness and plasticity, while intensity is also higher, with good
Comprehensive mechanical property.So that dislocation is largely eliminated, tearing tendency is greatly reduced, and thoroughly solves the appearance of macaroni commissure
The problem of crackle.
Although by reference to preferred embodiment, invention has been described, is not departing from the situation of the scope of the present invention
Under, various improvement can be carried out to it and part therein can be replaced with equivalent.Especially, as long as in the absence of structure punching
Prominent, the every technical characteristic being previously mentioned in each embodiment can combine in any way.The invention is not limited in text
Disclosed in specific embodiment, but all technical schemes including falling within the scope of the appended claims.
Claims (7)
1. a kind of drilling rod is molded the heat treatment method of weld seam, it is characterised in that comprise the following steps：
(1) weld metal zone for forming the rubbed weldering between drill pipe body and joint is made annealing treatment；
(2) drilling rod after annealing is put into air and cooled down, until being cooled to room temperature；
(3) drilling rod after cooling is subjected to temper,
Quenching Treatment is not carried out to drilling rod between step (1) and step (2),
The drilling rod external diameter is less than 88.9mm, and drill pipe body upset end wall thickness is less than 19.05mm,
The annealing temperature be 645 DEG C to 675 DEG C, soaking time be 9s to 11s,
The temperature is 635 DEG C to 665 DEG C, and soaking time is 80s to 100s.
2. drilling rod according to claim 1 is molded the heat treatment method of weld seam, it is characterised in that the annealing temperature is
660 DEG C, soaking time is 10s.
3. drilling rod according to claim 1 is molded the heat treatment method of weld seam, it is characterised in that the room temperature scope is 10
DEG C to 40 DEG C.
4. drilling rod according to claim 3 is molded the heat treatment method of weld seam, it is characterised in that the room temperature scope is 14
℃。
5. drilling rod according to claim 1 is molded the heat treatment method of weld seam, it is characterised in that the temperature is
650 DEG C, soaking time is 90s.
6. drilling rod according to claim 1 is molded the heat treatment method of weld seam, it is characterised in that the annealing adds with tempering
Heat is carried out in the Medium frequency induction coil of Intermediate Frequency Induction Heating Equipment.
7. drilling rod according to claim 1 is molded the heat treatment method of weld seam, it is characterised in that the annealing with it is described
The step of also including carrying out overlap processing to the weld seam between cooling step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510726979.5A CN105219944B (en) | 2015-10-30 | 2015-10-30 | A kind of drilling rod is molded the heat treatment method of weld seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510726979.5A CN105219944B (en) | 2015-10-30 | 2015-10-30 | A kind of drilling rod is molded the heat treatment method of weld seam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105219944A CN105219944A (en) | 2016-01-06 |
| CN105219944B true CN105219944B (en) | 2017-11-03 |
Family
ID=54989210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510726979.5A Active CN105219944B (en) | 2015-10-30 | 2015-10-30 | A kind of drilling rod is molded the heat treatment method of weld seam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105219944B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107619921B (en) * | 2017-09-29 | 2019-01-25 | 彭娟 | A kind of intermediate-frequency induction heating technique of martensite heat-resistant steel weld bond |
| CN111113055B (en) * | 2019-12-05 | 2021-10-22 | 中煤科工集团西安研究院有限公司 | Preparation method of non-magnetic drill rod for directional drilling of coal mine tunnel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101624645A (en) * | 2009-08-04 | 2010-01-13 | 武汉科技大学 | Thermal treatment method for thinning weld metal structure |
| CN102212670A (en) * | 2011-05-05 | 2011-10-12 | 衡阳鸿锦石油钻具有限公司 | Drill pipe friction welding post-treatment process |
-
2015
- 2015-10-30 CN CN201510726979.5A patent/CN105219944B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101624645A (en) * | 2009-08-04 | 2010-01-13 | 武汉科技大学 | Thermal treatment method for thinning weld metal structure |
| CN102212670A (en) * | 2011-05-05 | 2011-10-12 | 衡阳鸿锦石油钻具有限公司 | Drill pipe friction welding post-treatment process |
Non-Patent Citations (2)
| Title |
|---|
| 45钢凸轮轴摩擦焊接及焊后热处理;毛信孚等;《金属热处理》;20060725(第07期);90-92 * |
| Ф127mmG105级钻杆焊后热处理工艺改进;王鑫等;《金属热处理》;20040625;第29卷(第06期);66-68 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105219944A (en) | 2016-01-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11377704B2 (en) | High performance material for coiled tubing applications and the method of producing the same | |
| US7770428B2 (en) | Hot bend pipe and a process for its manufacture | |
| US7780800B2 (en) | Method of manufacturing a bent pipe | |
| WO2014045590A1 (en) | Electric-resistance-welded steel pipe exhibiting excellent hic resistance and low-temperature toughness at electric-resistance-welded parts, and production method therefor | |
| JPWO2016093161A1 (en) | Low alloy steel for oil well pipe and method for producing low alloy steel oil well pipe | |
| EP2468904A1 (en) | Method for manufacturing thick-walled seamless steel pipe | |
| CN104438334A (en) | Medium-caliber 9Ni low-temperature seamless steel tube and production method | |
| CN105219944B (en) | A kind of drilling rod is molded the heat treatment method of weld seam | |
| CN104451381A (en) | Large-caliber Gr3 seamless steel tube applied at low temperature and production method thereof | |
| CN110662853A (en) | Steel bent pipe and method for manufacturing same | |
| JP4193757B2 (en) | Steel sheet for ultra-high-strength line pipe, manufacturing method thereof and welded steel pipe | |
| JP5971415B2 (en) | Manufacturing method of martensitic stainless hot-rolled steel strip for welded steel pipe for line pipe | |
| CN114278792B (en) | Stainless steel pipe and preparation method thereof | |
| JP6390677B2 (en) | Low carbon martensitic stainless steel welded pipe and method for producing the same | |
| JP4432719B2 (en) | Thick steel plate for line pipe and manufacturing method thereof | |
| JP2003129178A (en) | High-strength pc steel bar superior in delayed fracture characteristic | |
| CN104651591A (en) | High-strength low-hardness continuous oil pipe and preparation method thereof | |
| Rashid et al. | The use of optimized erw technique to improve low temperature fracture toughness of welded pipes | |
| RU2798180C2 (en) | High-quality material for flexible long-dimensional pipes and method for its manufacture | |
| CN118389954A (en) | Ultra-low carbon thick-wall X65QS corrosion-resistant seamless pipeline steel pipe and manufacturing method thereof | |
| JP2000282144A (en) | Production of martensitic welded stainless steel pipe | |
| Wang et al. | The effect of temper temperature on property and microstructure of X80 induction bends | |
| JP2000119748A (en) | Production of 13 chromium series stainless thick steel plate | |
| JPH0610309B2 (en) | Post-heat treatment method for welding heat affected zone of ERW steel pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |