CN108531805A - Steel pipe, its raw material, its production method and rotary drilling rig drilling rod - Google Patents
Steel pipe, its raw material, its production method and rotary drilling rig drilling rod Download PDFInfo
- Publication number
- CN108531805A CN108531805A CN201810260589.7A CN201810260589A CN108531805A CN 108531805 A CN108531805 A CN 108531805A CN 201810260589 A CN201810260589 A CN 201810260589A CN 108531805 A CN108531805 A CN 108531805A
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- pipe
- raw material
- mentioned
- production 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
Abstract
This application provides a kind of steel pipe, its raw material, its production method and rotary drilling rig drilling rods.In percentage by weight, the raw material of the steel pipe include 0.26~0.32% C, 0.20~0.50% Si, 1.20~1.70% Mn, the P less than or equal to 0.02%, the S less than or equal to 0.015%, 0.012~0.04% Ti and 0.0005~0.0030% B, remaining be Fe and inevitable impurity.In the raw material of the steel pipe, the content of C is controlled between 0.26~0.32%, ensures that steel pipe has certain yield strength and preferable welding performance；The content of Mn is controlled between 1.20~1.70% so that Mn preferably plays solution strengthening effect, improves the yield strength of steel pipe, and the yield strength for the steel pipe which forms can reach the quenching degree that 650MPa or more, Ti and B can further increase steel pipe.
Description
Technical field
This application involves steel pipe fields, in particular to a kind of steel pipe, its raw material, its production method and churning driven
Machine drilling rod.
Background technology
Rotary drilling rig is a kind of construction machinery of pore-forming operation in suitable building foundation engineering, is primarily adapted for sand, viscosity
The soil layers such as soil and slity soil are constructed, in a variety of foundation basic constructions such as building construction, bored concrete pile, diaphragm wall and strengthening of foundation
It is used widely.
Rotary drilling rig is with characteristics such as its high efficiency and low stains, oneself becomes domestic and international heavy construction, railway and height at present
The main construction equipment of fast Road Bridge Pile Foundation plinth construction.And with the increasing of national basis construction investment, the need of rotary drilling rig
The amount of asking is increased sharply.
The rotary drilling rig critical component that drilling rod is rotary drilling rig, rotary drilling rig drilling rod is by several sections of various outer diameters and wall thickness
Steel pipe nesting be composed, often save drilling rod be made of seamless steel pipe and the inside and outside drive key being welded thereon.
But the yield strength of the seamless steel pipe of common rotary drilling rig drilling rod is relatively low at present, causes it that cannot meet
The demand of high intensity drilling.
Invention content
The main purpose of the application is to provide a kind of steel pipe, its raw material, its production method and rotary drilling rig drilling rod,
To solve the problems, such as that steel pipe yield strength in the prior art is relatively low.
To achieve the goals above, according to the one side of the application, a kind of raw material of steel pipe is provided, according to weight hundred
Point than meter, the raw material of the steel pipe include 0.26~0.32% C, 0.20~0.50% Si, 1.20~1.70% Mn, be less than
Or the P equal to 0.02%, the S less than or equal to 0.015%, 0.012~0.04% Ti and 0.0005~0.0030%
B, remaining is Fe and inevitable impurity.
Further, in the raw material of above-mentioned steel pipe, C equivalent≤0.68%.
Further, to achieve the goals above, according to the one side of the application, a kind of making side of steel pipe is provided
Method, the production method include：Step S1 is smelted to obtain blank to the raw material of above-mentioned steel pipe；Step S2, to above-mentioned blank
It is heated and is perforated, obtain hollow billet；Step S3 carries out tube rolling to above-mentioned hollow billet, obtains hot-rolled pipe；Step S4, to above-mentioned heat
Tube rolling carries out thermal expansion processing and Tempering and Quenching, obtains fished pipe.
Further, above-mentioned steps S2 includes：Step S21 obtains hot base to above-mentioned blank heating；Step S22, to upper
Hot base is stated into eleven punch 11, obtains above-mentioned hollow billet.
Further, above-mentioned steps S4 includes：Thermal expansion is carried out to above-mentioned hot-rolled pipe, obtains pre- pipe；To above-mentioned pre- pipe
Tempering and Quenching is carried out, above-mentioned fished pipe is obtained.
Further, include to the process of above-mentioned pre- pipe progress Tempering and Quenching：Step A1, at 910~930 DEG C,
Above-mentioned pre- pipe is heated, 10~20min postcoolings are kept the temperature；Step A2 carries out water cooling to the above-mentioned pre- pipe after heating
Quenching；Step A3 is tempered the above-mentioned pre- pipe after water hardening at 570~610 DEG C, keeps the temperature 40~90min, obtains
To above-mentioned fished pipe.
Further, after above-mentioned steps S4, above-mentioned production method further includes：Online heat is carried out to above-mentioned fished pipe
Sizing, the temperature of preferably above-mentioned online hot size is between 500~650 DEG C.
According to the application's in another aspect, providing a kind of steel pipe, in percentage by weight, the steel pipe include 0.26~
0.32% C, 0.20~0.50% Si, 1.20~1.70% Mn, the P less than or equal to 0.02%, be less than or equal to
The B of 0.015% S, 0.012~0.04% Ti and 0.0005~0.0030%, remaining for Fe and inevitably it is miscellaneous
Matter.
Further, in above-mentioned steel pipe, C equivalent≤0.68%.
According to the another aspect of the application, a kind of rotary drilling rig drilling rod is provided, which includes steel
Pipe, above-mentioned steel pipe are any above-mentioned steel pipe or the steel pipe that any above-mentioned production method obtains.
Using the technical solution of the application, in the raw material of the steel pipe, the content of C is controlled between 0.26~0.32%, is protected
The steel pipe that card is formed has certain yield strength, while can guarantee it with preferable welding performance again；Control the content of Mn
Between 1.20~1.70% so that Mn preferably plays solution strengthening effect, should to further increase the yield strength of steel pipe
The yield strength for the steel pipe that raw material is formed can reach 650MPa or more；A small amount of Ti and B can further increase steel pipe
Quenching degree.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the improper restriction to the application for explaining the application.In the accompanying drawings：
Fig. 1 shows the flow diagram of the production method of the steel pipe of the application.
Specific implementation mode
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
As background technology is introduced, the yield strength of steel pipe in the prior art is relatively low and impact flexibility is not high, with
And it is also easy to produce hardening flaw in heat treatment, in order to solve technical problem as above, present applicant proposes a kind of steel pipe, its originals
Material, its production method and rotary drilling rig drilling rod.
In a kind of typical embodiment of the application, a kind of raw material of steel pipe is provided, it in percentage by weight, should
The raw material of steel pipe include 0.26~0.32% C, 0.20~0.50% Si, 1.20~1.70% Mn, be less than or equal to
0.02% P, the S less than or equal to 0.015%, 0.012~0.04% Ti and 0.0005~0.0030% B, remaining
It is Fe and inevitable impurity.
In the raw material of the steel pipe, the content of C is controlled between 0.26~0.32%, ensures that the steel pipe to be formed has centainly
Yield strength, while can guarantee it with preferable welding performance again；The content of Mn is controlled between 1.20~1.70% so that
Mn preferably plays solution strengthening effect, and to further increase the yield strength of steel pipe, the surrender for the steel pipe which forms is strong
Degree can reach 650MPa or more；A small amount of Ti and B can further increase the quenching degree of steel pipe.
In a kind of embodiment of the application, C equivalent≤0.68% in the raw material of steel pipe is controlled.It can ensure that steel has in this way
Preferable intensity, while can guarantee that the calculation formula of C equivalents is CEV=C+ (Mn/6)+[(Cr with preferable welding performance again
+Mo+V)/5]+[(Ni+Cu)/15].The percentage composition of corresponding element, works as steel pipe raw material in the raw material of each alphabet steel tube
In corresponding element not to be covered when, percentage composition be remnants.
In the typical embodiment of another kind of the application, a kind of production method of steel pipe is provided, as shown in Figure 1, should
The production method of steel pipe includes：Step S1 is smelted to obtain blank to the raw material of above-mentioned steel pipe；Step S2, to above-mentioned base
Material is heated and is perforated, and hollow billet is obtained；Step S3 carries out tube rolling to above-mentioned hollow billet and obtains hot-rolled pipe；Step S4, to above-mentioned heat
Tube rolling carries out thermal expansion processing and Tempering and Quenching, obtains fished pipe, i.e. steel pipe.
The steel pipe of above-mentioned raw material due to being made so that the steel pipe of formation has higher yield strength, to full
The application demand of sufficient high intensity.
In order to further enhance the uniformity and mechanical property of the caliber of obtained hot finished steel pipe, a kind of reality of the application
It applies in example, above-mentioned rapid S2 includes：Step S21 obtains hot base to above-mentioned blank heating；Step S22 wears above-mentioned hot base
Hole obtains above-mentioned hollow billet.
In the another embodiment of the application, the heating process of above-mentioned steps S21 includes three phases, specially preheats rank
Section, heating period and soaking stage.Heating period includes I section of heating, II sections of heating and heats III sections, and the soaking stage includes
II sections of I sections of soaking and soaking.Specifically, the temperature of above-mentioned blank reaches 970~990 DEG C after preheating section heating, adds by above-mentioned
The temperature of above-mentioned blank reaches 1090~1010 DEG C after I section of heating of heat, the temperature of above-mentioned blank after II section of heating of above-mentioned heating
Degree reaches 1170~1190 DEG C, and the temperature of above-mentioned blank reaches 1240~1260 DEG C after III section of heating of above-mentioned heating, then
After I section of the soaking and II section of soaking of soaking of 1270~1290 DEG C of temperature, above-mentioned hot base is obtained.By above-mentioned heat stepwise,
So that hot finished steel pipe is stepped up to soaking temperature, avoids the too fast defect for causing to crack in hot base of heating rate.
Also, the blank in order to further ensure obtaining hot base sufficiently uniformly heats, and ensures that blank heating is kept away simultaneously thoroughly
The crystal grain for exempting from long-time heating generation is grown up, in a kind of embodiment in the application, heating time of above-mentioned steps S21 80~
Between 120min.
In order to enable the heating of blank is more uniform, to further avoid occurring heating defect, a kind of reality of the application
It applies in example, the time of above-mentioned warm-up phase is 10min~14min, and the time of I section of heating is 15min~19min, heats II sections
Time be 25min~29min, heating III section time be 20min~30min, the time that I of soaking for 20min~
24min, the time that II of soaking are 10min~14min.
In the another embodiment of the application, above-mentioned steps S3 includes：Above-mentioned hollow billet is rolled, is obtained by step S31
Hollow forging；Step S32 preheat simultaneously sizing or tube reducing to above-mentioned hollow forging, is obtaining hot-rolled pipe, the temperature of preferably above-mentioned preheating is
920~965 DEG C, it can be that subsequent sizing or tube reducing are laid a solid foundation to the preheating of hollow forging, improve treatment effect.
In a kind of embodiment of the application, above-mentioned steps S4 includes：Thermal expansion (i.e. thermal expansion is processed) is carried out to above-mentioned hot-rolled pipe,
Obtain pre- pipe；Tempering and Quenching is carried out to above-mentioned pre- pipe, obtains above-mentioned production tube, which can further protect
Demonstrate,prove the performance of fished pipe.
In another preferred embodiment of the application, the process for carrying out Tempering and Quenching to above-mentioned pre- pipe includes：Step
Rapid A1 heats above-mentioned pre- pipe at 910~930 DEG C, keeps the temperature 10~20min postcoolings, further ensures in this way
The uniformity of steel pipe austenitizing, while alloy being made at the uniform velocity to be substantially dissolved in austenite；Step A2, to after heating (due to, step
The main methods of rapid A1 are heating, so after the processing for representing step A1 " after heating " here, and after coming out of the stove) it is pre-
Pipe carries out water hardening, to obtain martensitic structure；Step A3, at 570~610 DEG C, to above-mentioned after water hardening
Pre- pipe is tempered, and is kept the temperature 40~90min, so that alloying element is fully precipitated from oversaturated solid solution in this way,
It obtains the carbide of disperse and the tissue after tempering is made to tend to stablize.In the processing procedure, alloys producing is filled
The performance divided, and then the stability of steel duct metallographic structure is improved, improve the plasticity and toughness of seamless steel pipe.
After above-mentioned Tempering and Quenching step, in a kind of embodiment of the application, above-mentioned production method can also include
The temperature of online hot size step, preferably above-mentioned online hot size is 500~650 DEG C.Sizing after tempering, advantageously reduces heat
Deformation in processing procedure reduces the ovality of steel pipe.Above-mentioned production method can also include straightening step, preferably straightening step
Temperature be 450~630 DEG C.Straightening temperature after tempering within the above range, advantageously reduce generated in straightening process it is residual
Residue stress.
In the typical embodiment of another of the application, a kind of steel pipe is provided, in percentage by weight, the steel pipe
Including 0.26~0.32% C, 0.20~0.50% Si, 1.20~1.70% Mn, the P less than or equal to 0.02%, small
In or equal to 0.015% S, 0.012~0.04% Ti and 0.0005~0.0030% B, remaining is Fe and can not
The impurity avoided.
In the steel pipe, the content of C is controlled between 0.26~0.32%, ensures that the steel pipe to be formed has certain surrender strong
Degree, while can guarantee it with preferable welding performance again；The content of Mn is controlled between 1.20~1.70% so that Mn is more preferable
Ground plays solution strengthening effect, and to further increase the yield strength of steel pipe, the yield strength of the steel pipe can reach 650MPa
Or more；A small amount of Ti and B can further increase the quenching degree of steel pipe.
In another embodiment of the application, C equivalent≤0.68% in the raw material of steel pipe is controlled.It can ensure steel in this way
Have preferable intensity, while can guarantee again with preferable welding performance, the calculation formula of C equivalents be CEV=C+ (Mn/6)+
[(Cr+Mo+V)/5]+[(Ni+Cu)/15]。
In the typical embodiment of another of the application, a kind of rotary drilling rig drilling rod is provided, which includes steel
Pipe, the steel pipe are above-mentioned steel pipe or the prepared steel pipe of above-mentioned production method.
The rotary drilling rig drilling rod is due to including above-mentioned steel pipe so that its yield strength is higher, can preferably expire
The demand of sufficient high intensity drilling.
In a kind of embodiment, the outer diameter of rotary drilling rig drilling rod is between 100~630mm, and wall thickness is between 8~30mm.
In order to enable those skilled in the art can clearly understand the technical solution of the application, below with reference to tool
The embodiment of body illustrates the technical solution of the application.
Embodiment 1
In percentage by weight, the raw material of steel pipe include 0.26% C, 0.50% Si, 1.20% Mn, 0.02%
P, 0.015% S, 0.012% Ti and 0.0030% B, remaining is Fe and inevitable impurity, and C equivalents are
0.46%.
Specifically the manufacturing process of steel pipe includes：
The raw material of steel pipe is smelted, obtains blank by step S1.
Specifically, raw material obtains blank by electric furnace smelting, external refining, vacuum outgas and arc continuous casting.
Step S2 heats above-mentioned blank, then uses tapered roller into eleven punch 11, obtains hollow billet.
Specifically, first, blank is heated, heating process includes warm-up phase, I sections of heating, II sections of heating, heating
II sections of III sections, I sections of soaking and soaking.The time in each stage be respectively 10min, 15min, 25min, 20min, 20min and
10min.Specifically, the temperature of above-mentioned blank reaches 970 DEG C after preheating section heating, the above-mentioned base after I section of heating of above-mentioned heating
The temperature of material reaches 1090 DEG C, and the temperature of above-mentioned blank reaches 1170 DEG C after II section of heating of above-mentioned heating, adds by above-mentioned
The temperature of above-mentioned blank reaches 1240 DEG C after III section of heating of heat, then in I section of the soaking of 1270 DEG C of temperature and II section of soaking of soaking
Afterwards, above-mentioned hot base is obtained.
Above-mentioned hot base is obtained into hollow billet at 1130 DEG C into eleven punch 11.
Step S3 carries out tube rolling to above-mentioned hollow billet, obtains hot-rolled pipe.
Specifically, above-mentioned hollow billet is subjected to tube rolling first with PQF pipe mills, obtains hollow forging；Medium carries out hollow forging pre-
Heat and sizing, obtain hot-rolled pipe.
Step S4 carries out thermal expansion processing and Tempering and Quenching to above-mentioned hot-rolled pipe, obtains fished pipe.
Specifically, by the heating of above-mentioned hot-rolled pipe and thermal expansion, pre- pipe is obtained；Tempering and Quenching is carried out to above-mentioned pre- pipe,
Obtain above-mentioned fished pipe.
The process that Tempering and Quenching is carried out to above-mentioned pre- pipe adds above-mentioned pre- pipe specifically, at 910 DEG C
Heat keeps the temperature 20min postcoolings；Water hardening is carried out to the above-mentioned pre- pipe after heating, obtains martensitic structure；At 570 DEG C,
Above-mentioned pre- pipe after water hardening is tempered, it is air-cooled after heat preservation 90min, obtain fished pipe.
Step S5 carries out online hot size to above-mentioned fished pipe, and the temperature of above-mentioned online hot size is 500 DEG C.
Embodiment 2
With the difference of embodiment 1, the raw material of steel pipe include 0.32% C, 0.20% Si, 1.70% Mn,
0.01% P, 0.010% S, 0.04% Ti and 0.0005% B, remaining be Fe and inevitable impurity.C works as
Amount is 0.603%.Also, and during obtaining above-mentioned fished pipe to above-mentioned pre- pipe progress Tempering and Quenching, heating
Temperature be 930 DEG C, soaking time 10min, at 610 DEG C, the above-mentioned pre- pipe after water hardening is tempered, keep the temperature
Air-cooled after 40min, the temperature of online hot size later is 650 DEG C.
Embodiment 3
With the difference of embodiment 1, the raw material of steel pipe include 0.30% C, 0.35% Si, 1.45% Mn,
0.015% P, 0.012% S, 0.025% Ti and 0.0015% B, remaining be Fe and inevitable impurity.C
Equivalent is 0.542%.Also, and during carrying out being thermally treated resulting in above-mentioned steel pipe to above-mentioned pre- pipe, the temperature of heating
It is 920 DEG C, soaking time 15min, at 590 DEG C, the above-mentioned pre- pipe after water hardening is tempered, keeps the temperature 60min
It is air-cooled afterwards, fished pipe is obtained, the temperature of online hot size later is 625 DEG C.
Embodiment 4
The difference from example 2 is that：The raw material of steel pipe includes 0.20% Cr, 0.1% Mo, 0.2% V, C equivalents
It is 0.703%.
Embodiment 5
With embodiment 3 difference lies in：The mistake of above-mentioned fished pipe is obtained carrying out Tempering and Quenching to above-mentioned pre- pipe
The temperature of Cheng Zhong, heating are 900 DEG C.
Embodiment 6
With embodiment 3 difference lies in：The mistake of above-mentioned fished pipe is obtained carrying out Tempering and Quenching to above-mentioned pre- pipe
The soaking time of Cheng Zhong, heating are 8min.
Embodiment 7
With embodiment 3 difference lies in：The mistake of above-mentioned fished pipe is obtained carrying out Tempering and Quenching to above-mentioned pre- pipe
Cheng Zhong, the temperature being tempered to the above-mentioned pre- pipe after water hardening are 580 DEG C.
Embodiment 8
With embodiment 3 difference lies in：The mistake of above-mentioned fished pipe is obtained carrying out Tempering and Quenching to above-mentioned pre- pipe
Cheng Zhong, the soaking time being tempered to the above-mentioned pre- pipe after water hardening are 30min.
Embodiment 9
With embodiment 3 difference lies in：The temperature of online hot size is 480 DEG C.
Comparative example 1
With embodiment 3 difference lies in：The raw material of steel pipe includes 0.1% C, and the content of Fe changes correspondingly.
Comparative example 2
With embodiment 3 difference lies in：The raw material of steel pipe includes 0.60% Si, and the content of Fe changes correspondingly.
Comparative example 3
With embodiment 3 difference lies in：The raw material of steel pipe includes 2.0% Mn, and the content of Fe changes correspondingly.
Comparative example 4
With embodiment 3 difference lies in：The raw material of steel pipe includes 0.04% P, and the content of Fe changes correspondingly.
Comparative example 5
With embodiment 3 difference lies in：The raw material of steel pipe includes 0.03% S, and the content of Fe changes correspondingly.
Comparative example 6
With embodiment 3 difference lies in：The raw material of steel pipe includes 0.06% Ti, and the content of Fe changes correspondingly.
Comparative example 7
With embodiment 3 difference lies in：The raw material of steel pipe includes 0.01% B, and the content of Fe changes correspondingly.
According to《The standard method and definition of steel product mechanical property test》Specified in method to embodiment and comparison
The seamless steel pipe of example carries out tension test and impact test, test result are shown in Table 1.
Table 1
By the data in above-mentioned table 1 it is found that when steel pipe raw material include 0.26~0.32% C, 0.20~0.50%
Si, 1.20~1.70% Mn, the P less than or equal to 0.02%, the S less than or equal to 0.015%, 0.012~0.04%
When the B of Ti and 0.0005~0.0030%；And during the Tempering and Quenching of manufacturing process, at 910~930 DEG C, to upper
It states pre- pipe to be heated, keeps the temperature 10~20min postcoolings；Water hardening is carried out to the above-mentioned pre- pipe after heating；570~
At 610 DEG C, the above-mentioned pre- pipe after water hardening is tempered, keeps the temperature 40~90min；Also, the temperature of online hot size
When between 500~650 DEG C, the tensile strength of prepared steel pipe, yield strength, the contraction percentage of area, elongation percentage, hardness with
And the better performances such as room temperature impact of collision.
It can be seen from the above description that the application the above embodiments realize following technique effect：
1), in the raw material of the steel pipe of the application, the content of C is controlled between 0.26~0.32%, ensures the steel pipe to be formed
With certain yield strength, while it can guarantee it with preferable welding performance again；Control the content of Mn 1.20~
Between 1.70% so that Mn preferably plays solution strengthening effect, and to further increase the yield strength of steel pipe, which forms
The yield strength of steel pipe can reach 650MPa or more；A small amount of Ti and B can further increase the quenching degree of steel pipe.
2), the production method of the steel pipe of the application so that the steel pipe of formation has higher yield strength, to meet height
The application demand of intensity.
3), in the steel pipe of the application, the content of C is controlled between 0.26~0.32%, ensures that the steel pipe to be formed has one
Fixed yield strength, while can guarantee it with preferable welding performance again；The content of Mn is controlled between 1.20~1.70%,
So that Mn preferably plays solution strengthening effect, to further increase the yield strength of steel pipe, the yield strength of the steel pipe can
Reach 650MPa or more；A small amount of Ti and B can further increase the quenching degree of steel pipe so that steel has higher impact
Toughness, room temperature impact of collision can reach 50J or more.
4), the rotary drilling rig drilling rod of the application, due to including above-mentioned steel pipe so that its yield strength is higher, energy
It is enough preferably to meet the needs of high intensity drilling, while impact flexibility height makes drilling rod be not easy to form fatigue fracture.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. a kind of raw material of steel pipe, which is characterized in that in percentage by weight, the raw material of the steel pipe includes 0.26~
0.32% C, 0.20~0.50% Si, 1.20~1.70% Mn, the P less than or equal to 0.02%, be less than or equal to
The B of 0.015% S, 0.012~0.04% Ti and 0.0005~0.0030%, remaining for Fe and inevitably it is miscellaneous
Matter.
2. the raw material of steel pipe according to claim 1, which is characterized in that in the raw material of the steel pipe, C equivalents≤
0.68%.
3. a kind of production method of steel pipe, which is characterized in that the production method includes：
Step S1 is smelted to obtain blank to the raw material of steel pipe as claimed in claim 1 or 2；
Step S2 is heated and is perforated to the blank, obtains hollow billet；
Step S3 carries out tube rolling to the hollow billet, obtains hot-rolled pipe；And
Step S4 carries out thermal expansion processing and Tempering and Quenching to the hot-rolled pipe, obtains fished pipe.
4. production method according to claim 3, which is characterized in that the step S2 includes：
Step S21 obtains hot base to the blank heating；And
Step S22 obtains the hollow billet to the hot base into eleven punch 11.
5. production method according to claim 3, which is characterized in that the step S4 includes：
Thermal expansion is carried out to the hot-rolled pipe, obtains pre- pipe；And
Tempering and Quenching is carried out to the pre- pipe, obtains the fished pipe.
6. production method according to claim 5, which is characterized in that carry out the process of Tempering and Quenching to the pre- pipe
Including：
Step A1 heats the pre- pipe at 910~930 DEG C, keeps the temperature 10~20min postcoolings；
Step A2 carries out water hardening to the pre- pipe after heating；And
Step A3 is tempered the pre- pipe after water hardening at 570~610 DEG C, keeps the temperature 40~90min, obtains
The fished pipe.
7. production method according to claim 5, which is characterized in that after the step S4, the production method is also
Including：
Online hot size is carried out to the fished pipe, the temperature of the preferably described online hot size is between 500~650 DEG C.
8. a kind of steel pipe, which is characterized in that in percentage by weight, the steel pipe include 0.26~0.32% C, 0.20~
0.50% Si, 1.20~1.70% Mn, the P less than or equal to 0.02%, the S less than or equal to 0.015%, 0.012~
0.04% Ti and 0.0005~0.0030% B, remaining is Fe and inevitable impurity.
9. steel pipe according to claim 8, which is characterized in that in the steel pipe, C equivalent≤0.68%.
10. a kind of rotary drilling rig drilling rod, including steel pipe, which is characterized in that the steel pipe is the steel described in claim 8 or 9
The steel pipe that production method described in any one of pipe or claim 3 to 7 obtains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810260589.7A CN108531805A (en) | 2018-03-27 | 2018-03-27 | Steel pipe, its raw material, its production method and rotary drilling rig drilling rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810260589.7A CN108531805A (en) | 2018-03-27 | 2018-03-27 | Steel pipe, its raw material, its production method and rotary drilling rig drilling rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108531805A true CN108531805A (en) | 2018-09-14 |
Family
ID=63483760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810260589.7A Pending CN108531805A (en) | 2018-03-27 | 2018-03-27 | Steel pipe, its raw material, its production method and rotary drilling rig drilling rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108531805A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108588552A (en) * | 2018-03-27 | 2018-09-28 | 衡阳华菱连轧管有限公司 | Steel pipe, its raw material, its production method and rotary drilling rig drilling rod |
| CN113172116A (en) * | 2021-04-25 | 2021-07-27 | 衡阳华菱连轧管有限公司 | Preparation method of seamless steel pipe, seamless steel pipe and drill rod structure |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06184636A (en) * | 1992-12-18 | 1994-07-05 | Nippon Steel Corp | Production of high strength and high toughness seamless steel pipe excellent in weldability |
| CN101259582A (en) * | 2008-04-28 | 2008-09-10 | 江阴市界达特异制管有限公司 | Preparation of seamless special-shaped steel pipe for low temperature resistance oil derrick electric transmission pole tower |
| CN101280391A (en) * | 2008-05-08 | 2008-10-08 | 攀钢集团成都钢铁有限责任公司 | High-strength tough hydraulic prop seamless steel pipe |
| CN101410194A (en) * | 2006-03-29 | 2009-04-15 | 住友金属工业株式会社 | Cold finish seamless steel pipe for drive shaft and method for producing the same |
| CN101652197A (en) * | 2007-03-30 | 2010-02-17 | 住友金属工业株式会社 | Cold-finished seamless steel pipe for integrally molded drive shaft, drive shaft using the pipe, and method for manufacturing the cold-finished seamless steel pipe |
| CN101914666A (en) * | 2010-09-19 | 2010-12-15 | 天津钢管集团股份有限公司 | Method for improving transverse impact toughness of seamless steel tube |
| CN103361561A (en) * | 2013-07-05 | 2013-10-23 | 内蒙古包钢钢联股份有限公司 | Seamless steel tube material for coupling material and preparation method thereof |
| CN108588552A (en) * | 2018-03-27 | 2018-09-28 | 衡阳华菱连轧管有限公司 | Steel pipe, its raw material, its production method and rotary drilling rig drilling rod |
-
2018
- 2018-03-27 CN CN201810260589.7A patent/CN108531805A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06184636A (en) * | 1992-12-18 | 1994-07-05 | Nippon Steel Corp | Production of high strength and high toughness seamless steel pipe excellent in weldability |
| CN101410194A (en) * | 2006-03-29 | 2009-04-15 | 住友金属工业株式会社 | Cold finish seamless steel pipe for drive shaft and method for producing the same |
| CN101652197A (en) * | 2007-03-30 | 2010-02-17 | 住友金属工业株式会社 | Cold-finished seamless steel pipe for integrally molded drive shaft, drive shaft using the pipe, and method for manufacturing the cold-finished seamless steel pipe |
| CN101259582A (en) * | 2008-04-28 | 2008-09-10 | 江阴市界达特异制管有限公司 | Preparation of seamless special-shaped steel pipe for low temperature resistance oil derrick electric transmission pole tower |
| CN101280391A (en) * | 2008-05-08 | 2008-10-08 | 攀钢集团成都钢铁有限责任公司 | High-strength tough hydraulic prop seamless steel pipe |
| CN101914666A (en) * | 2010-09-19 | 2010-12-15 | 天津钢管集团股份有限公司 | Method for improving transverse impact toughness of seamless steel tube |
| CN103361561A (en) * | 2013-07-05 | 2013-10-23 | 内蒙古包钢钢联股份有限公司 | Seamless steel tube material for coupling material and preparation method thereof |
| CN108588552A (en) * | 2018-03-27 | 2018-09-28 | 衡阳华菱连轧管有限公司 | Steel pipe, its raw material, its production method and rotary drilling rig drilling rod |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108588552A (en) * | 2018-03-27 | 2018-09-28 | 衡阳华菱连轧管有限公司 | Steel pipe, its raw material, its production method and rotary drilling rig drilling rod |
| CN113172116A (en) * | 2021-04-25 | 2021-07-27 | 衡阳华菱连轧管有限公司 | Preparation method of seamless steel pipe, seamless steel pipe and drill rod structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5787492B2 (en) | Steel pipe manufacturing method | |
| JP6466573B2 (en) | Yield strength 800 MPa class high toughness hot rolled high strength steel and method for producing the same | |
| JP6574307B2 (en) | High toughness seamless steel pipe and manufacturing method thereof | |
| JP5252131B2 (en) | Hardening method of steel pipe | |
| CN105112774B (en) | The air-cooled hardening spring steel of the low middle carbon microalloy of high-strength tenacity and its shaping and Technology for Heating Processing | |
| CN106868413B (en) | Ultra-fine grained ferrite/nanometer bainite two-phase medium carbon steel and preparation method thereof | |
| MX2013004025A (en) | Methods of manufacturing steel tubes for drilling rods with improved mechanical properties, and rods made by the same. | |
| BR102012003529B1 (en) | STEEL PIPE AND METHOD FOR THE SAME PRODUCTION | |
| CN107794357A (en) | The method of super rapid heating technique productions superhigh intensity martensite cold-rolled steel sheet | |
| NO343350B1 (en) | Seamless steel tube for oil wells with excellent resistance to sulphide stress cracking and method for producing seamless steel tubes for oil wells | |
| CN106102940A (en) | Heavy wall high tenacity high-tensile steel and manufacture method thereof | |
| CN105088081B (en) | The manufacturing process of stabiliser bar | |
| CN107385360A (en) | A kind of two phase stainless steel reinforcing bar and preparation method thereof | |
| JP5477089B2 (en) | Manufacturing method of high strength and high toughness steel | |
| JP2954922B1 (en) | Heat treatment method for precipitation hardening high silicon steel products | |
| CN108531805A (en) | Steel pipe, its raw material, its production method and rotary drilling rig drilling rod | |
| CN108588552A (en) | Steel pipe, its raw material, its production method and rotary drilling rig drilling rod | |
| CN110100027A (en) | The steel plate and its manufacturing method of low yielding ratio with excellent low-temperature flexibility | |
| CN107119238B (en) | The 690MPa grades wide thin steel for engineering machinery plate of yield strength and its production method | |
| JP6292366B1 (en) | Seamless steel pipe and manufacturing method thereof | |
| CN103866185B (en) | A kind of preparation method of online manufacture low cost superfine crystal particle transformation induced plasticity steel seamless tube | |
| JP2006037205A (en) | Method for producing hollow drive shaft having excellent fatigue resistance | |
| JP4043754B2 (en) | High strength PC steel bar with excellent delayed fracture characteristics | |
| JP6051735B2 (en) | Method for producing high-tensile steel sheet with excellent weldability and delayed fracture resistance | |
| JP5589335B2 (en) | Manufacturing method of high toughness steel |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180914 |
|
| RJ01 | Rejection of invention patent application after publication |