CN108588552A - 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
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- CN108588552A CN108588552A CN201810260020.0A CN201810260020A CN108588552A CN 108588552 A CN108588552 A CN 108588552A CN 201810260020 A CN201810260020 A CN 201810260020A CN 108588552 A CN108588552 A CN 108588552A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 121
- 239000010959 steel Substances 0.000 title claims abstract description 121
- 239000002994 raw material Substances 0.000 title claims abstract description 51
- 238000005553 drilling Methods 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 238000010791 quenching Methods 0.000 claims abstract description 26
- 230000000171 quenching effect Effects 0.000 claims abstract description 26
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 46
- 238000005496 tempering Methods 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 7
- 238000009785 tube rolling Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 8
- 238000003466 welding Methods 0.000 abstract description 8
- 238000005728 strengthening Methods 0.000 abstract description 7
- 238000002791 soaking Methods 0.000 description 17
- 239000000243 solution Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 238000005242 forging Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 238000004513 sizing Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- 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
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Articles (AREA)
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 0.25~0.33% C, 0.15~0.50% Si, 1.30~1.70% Mn, the P less than or equal to 0.020%, 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 ensures that the steel pipe to be formed has certain yield strength and preferable welding performance between 0.25~0.33%；The content of Mn can preferably play solution strengthening effect between 1.30~1.70%, and to improve the yield strength of steel pipe, appropriate Ti and B increase the quenching degree of steel.The yield strength for the steel pipe that the raw material is formed can reach 550MPa or more.
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 0.25~0.33% C, 0.15~0.50% Si, 1.30~1.70% Mn, be less than
Or the P equal to 0.020%, 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≤0.60%.
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 630~670 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 0.25~
0.33% C, 0.15~0.50% Si, 1.30~1.70% Mn, the P less than or equal to 0.020%, 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≤0.60%.
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 0.25~0.33%, 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 1.30~1.70% so that Mn preferably plays solution strengthening effect, to further increase the yield strength of steel pipe, fits
Amount addition Ti and B increases the quenching degree of steel.The yield strength for the steel pipe that the raw material is formed can reach 550MPa or more.
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.
It should be understood that when element (such as layer, film, region or substrate) is described as in another element "upper", this yuan
Part can be directly on another element, or intermediary element also may be present.Moreover, claims in specification and above
In, when description has element " connected " to another element, which " can be directly connected to " to another element, or pass through third
Element " electrical connection " is to another element.
As background technology is introduced, the yield strength of steel pipe in the prior art is relatively low, in order to solve skill as above
Art problem, present applicant proposes a kind of steel pipe, its raw material, its production method and rotary drilling rig drilling rods.
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 0.25~0.33% C, 0.15~0.50% Si, 1.30~1.70% Mn, be less than or equal to
0.020% 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 0.25~0.33%, 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 1.30~1.70% so that
Mn preferably plays solution strengthening effect, to further increase the yield strength of steel pipe, the appropriate through hardening added Ti and B and increase steel
Property.The yield strength for the steel pipe that the raw material is formed can reach 550MPa or more.
In a kind of embodiment of the application, C equivalent≤0.60% 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.Also, the production method process is simple, and cost is relatively low, and lumber recovery is higher.
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 II section of I section of heating and heating, and the soaking stage includes I sections of soaking and equal
It is II sections hot.Specifically, the temperature of above-mentioned blank reaches 970~990 DEG C after preheating section heating, after above-mentioned heating I sections heating
The temperature of above-mentioned blank reaches 1090~1010 DEG C, after above-mentioned heating II sections heating the temperature of above-mentioned blank reach 1170~
1190 DEG C, the temperature of above-mentioned blank reaches 1240~1260 DEG C after above-mentioned heating III sections heating, then temperature 1270~
After I sections of 1290 DEG C of soaking and II sections of soaking of soaking, above-mentioned hot base is obtained.By above-mentioned heat stepwise, pipe is made gradually to rise
Height arrives 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 sections 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, further ensures steel pipe Austria in this way
The uniformity of family name's body, while alloy being made at the uniform velocity to be substantially dissolved in austenite；Step A2, to after heating (due to step A1's
Main methods are heating, so after the processing for representing step A1 " after heating " here, and after coming out of the stove) pre- pipe into
Row water hardening, to obtain martensitic structure；Step A3, at 630~670 DEG C, to the above-mentioned pre- pipe after water hardening
It is tempered, keeps the temperature 40~90min, so that alloying element is fully precipitated from oversaturated solid solution in this way, obtain more
Scattered carbide simultaneously makes the tissue after tempering tend to stablize.In the processing procedure, alloys producing is adequately sent out
It waves, and then improves the stability of steel duct metallographic structure, improve the plasticity and toughness of seamless steel pipe.
After above-mentioned Tempering and Quenching step, above-mentioned production method can also include online hot size step, preferably on
The temperature for stating online hot size is 500~650 DEG C.Sizing after tempering advantageously reduces the deformation in heat treatment process, reduces
The ovality of steel pipe.Above-mentioned production method can also include straightening step, and the preferably temperature of straightening step is 450~630 DEG C.It returns
Straightening temperature after fire within the above range, advantageously reduces the residual stress generated in straightening process.
In the typical embodiment of another of the application, a kind of steel pipe is provided, in percentage by weight, the steel pipe
Including 0.25~0.33% C, 0.15~0.50% Si, 1.30~1.70% Mn, the P less than or equal to 0.020%, 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 0.25~0.33%, 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 1.30~1.70% so that Mn is more preferable
Ground plays solution strengthening effect, to further increase the yield strength of steel pipe, the appropriate quenching degree added Ti and B and increase steel.It should
The yield strength for the steel pipe that raw material is formed can reach 550MPa or more.
In another embodiment of the application, C equivalent≤0.60% 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].The percentage composition of corresponding element, works as steel pipe in the raw material of each alphabet steel tube
In raw material when corresponding element not to be covered, percentage composition is remnants.
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 8~25mm.
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 0.33% C, 0.50% Si, 1.30% Mn,
0.020% P, 0.015% S, 0.012% Ti and 0.0030% B, remaining be Fe and inevitable impurity.C
Equivalent is 0.546%.
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 630 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 preferably above-mentioned online hot size is 500 DEG C.
Embodiment 2
With the difference of embodiment 1, the raw material that the raw material of steel pipe includes steel pipe include 0.25% C, 0.15% Si,
The B of 1.70% Mn, 0.01% P, 0.011% S, 0.04% Ti and 0.0005%.C equivalents are 0.59%.Also,
During carrying out Tempering and Quenching to above-mentioned pre- pipe and obtaining above-mentioned fished pipe, the temperature of heating is 930 DEG C, when heat preservation
Between the above-mentioned pre- pipe after water hardening is tempered at 670 DEG C for 10min, keep the temperature air-cooled after 40min, obtain above-mentioned
Fished pipe.
Embodiment 3
With the difference of embodiment 1, the raw material of steel pipe include 0.29% C, 0.30% Si, 1.53% Mn,
0.014% P, 0.005% S, 0.024% Ti and 0.0016% B.C equivalents are 0.596%.Also, to above-mentioned
During pre- pipe progress Tempering and Quenching obtains above-mentioned fished pipe, the temperature of heating is 920 DEG C, and soaking time is
15min is tempered the above-mentioned pre- pipe after water hardening at 640 DEG C, air-cooled after heat preservation 60min, obtains above-mentioned finished product
Steel pipe.
Embodiment 4
With embodiment 3 difference lies in：The raw material of steel pipe further includes 0.1% V, and C equivalents are 0.616%.
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 0.25~0.33% C, 0.15~0.50%
Si, 1.30~1.70% Mn, the P less than or equal to 0.020%, 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；630~
At 670 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 0.25~0.33%, 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 1.30~
Between 1.70% so that Mn preferably plays solution strengthening effect, to further increase the yield strength of steel pipe, adds Ti in right amount
Increase the quenching degree of steel with B.The yield strength for the steel pipe that the raw material is formed can reach 550MPa or more.
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 0.25~0.33%, 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 1.30~1.70%,
So that Mn preferably plays solution strengthening effect, to further increase the yield strength of steel pipe, the appropriate Ti and B that adds increases steel
Quenching degree so that there is steel higher impact flexibility, room temperature impact of collision can reach 34J or more.The steel pipe that the raw material is formed
Yield strength can reach 550MPa or more.
4), the rotary drilling rig drilling rod of the application is due to including above-mentioned steel pipe so that its yield strength is higher, can
Preferably meets 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 0.25~
0.33% C, 0.15~0.50% Si, 1.30~1.70% Mn, the P less than or equal to 0.020%, 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≤
0.60%.
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 630~670 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 0.25~0.33% C, 0.15~
0.50% Si, 1.30~1.70% Mn, the P less than or equal to 0.020%, 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≤0.60%.
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.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108531805A (en) * | 2018-03-27 | 2018-09-14 | 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 |
| CN110410658A (en) * | 2019-07-30 | 2019-11-05 | 嘉兴三善金属制品有限公司 | Polygonal steel pipe and its production technology |
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