CN106435362A - Structural alloy steel for petroleum drilling tool and application thereof - Google Patents
Structural alloy steel for petroleum drilling tool and application thereof Download PDFInfo
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- CN106435362A CN106435362A CN201610954606.8A CN201610954606A CN106435362A CN 106435362 A CN106435362 A CN 106435362A CN 201610954606 A CN201610954606 A CN 201610954606A CN 106435362 A CN106435362 A CN 106435362A
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- steel
- alloy steel
- drilling tools
- structural alloy
- oil drilling
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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
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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
- C22C38/04—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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Earth Drilling (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention provides structural alloy steel for a petroleum drilling tool. The structural alloy steel contains the following components in percentage by weight: 0.43-0.48% of C, 0.15-0.35% of Si, 0.75-1.10% of Mn, less than or equal to 0.025% of S, 0.95-1.40% of Cr, 0.0006-0.0040% of B, 0.011-0.038% of Ti and the balance of iron and inevitable impurity elements. Compared with the prior art, the structural alloy steel for the petroleum drilling tool, provided by the invention, can be used for manufacturing petroleum drilling tools such as drill collars and heavy weight drill pipes with raw round steel diameter of less than Phi190mm, an expensive element Mo is not added into the steel under the condition that the product quality is guaranteed, the production cost is reduced, the market competitiveness of the product is improved, and precious metal resources are saved.
Description
Technical field
The invention belongs to structural alloy steel field, and in particular to a kind of oil drilling tools structural alloy steel and its application, is used
In the oil drilling tools boring ship, heavy weight drill pipe etc..
Background technology
Bore ship, heavy weight drill pipe steel is used for manufacturing oilfield wellbore tools in petroleum gas engineering, it in use will
Bear hale, the compound action such as torsion, shock and vibration, rotation by force, use condition is very harsh.Therefore have it is desired to bore ship steel
Good mechanical property, high quenching degree, higher consistency and purity of steel.
Such oil drilling tools typically use Unite States Standard 4145H steel making, American Society Testing and Materials's standard ASTM_ at present
In A29/A29M, the chemical composition (percentage by weight) of 4145H steel is：C0.43-0.48%, Si0.15-0.35%, Mn0.75-
1.00%th, P≤0.035%, S≤0.040%, Cr0.80-1.10%, Mo0.15-0.25%, remaining is iron and impurity element.
In American Iron and Steel Institute standard AISI, the chemical composition (percentage by weight) of 4145H steel is：C0.42-0.49%, Si0.15-
0.35%th, Mn0.65-1.10%, P≤0.035%, S≤0.040%, Cr0.75-1.20%, Mo0.15-0.25%, remaining is
Iron and impurity element.At present oil drilling tools manufactory is when producing big specification drilling tool (raw material round steel diameter >=Φ 175mm), in order to
Ensure the quenching degree of steel and the performance of product and quality, Mo content is improved to 0.30-0.40%.
But, Mo is expensive alloying element, on the premise of ensureing oil drilling tools performance and use quality, without plus Mo
Or less plus Mo for reduce product production cost, improve the competitiveness of product in market and save precious metal resource have important
Meaning.
Content of the invention
For solving above-mentioned technical problem, the present invention provides a kind of oil drilling tools structural alloy steel and its application, can be used for
Manufacture raw material round steel diameter<The oil drilling tools boring ship, heavy weight drill pipe etc. of Φ 190mm, on the premise of ensureing product quality, steel
In be not added with Mo element, reduce production cost.
A kind of oil drilling tools structural alloy steel that the present invention provides, the composition containing following percentage by weight：
C 0.43-0.48%, Si 0.15-0.35%, Mn 0.75-1.10%, P≤0.030%, S≤0.025%, Cr
0.95-1.40%, B 0.0006-0.0040%, Ti 0.011-0.038%, remaining is iron and inevitable impurity element.
Preferably, described oil drilling tools structural alloy steel, the composition containing following percentage by weight：
C 0.43-0.48%, Si 0.15-0.35%, Mn 0.85-1.08%, P≤0.025%, S≤0.020%, Cr
1.05-1.10%, B 0.0010-0.0035%, Ti 0.015-0.028%, remaining is iron and inevitable impurity element.
Preferably, described oil drilling tools structural alloy steel, the composition containing following percentage by weight：
C 0.43-0.48%, Si 0.15-0.35%, Mn 0.95-1.05%, P≤0.025%, S≤0.020%, Cr
1.21-1.31%, B 0.0010-0.0035%, Ti 0.015-0.028%, remaining is iron and inevitable impurity element.
Preferably, described oil drilling tools structural alloy steel, the composition containing following percentage by weight：
C 0.43-0.48%, Si0.15-0.35%, Mn 1.06-1.10%, P≤0.025%, S≤0.020%, Cr
0.95-1.04%, B 0.0010-0.0035%, Ti0.015-0.028%, remaining is iron and inevitable impurity element.
In the present invention, in steel, each alloying element content and effect are as follows：Carbon is that in steel, raising quenching degree and through hardening are rigid
Important element, controls carbon content scope to be 0.43-0.48% in the present invention, too low, can reduce intensity and hardness, too high then can
Reduce plasticity and toughness, increase workpiece quenching tearing tendency.
Silicon is mainly present in, with the form of solid solution, the intensity that can improve steel in ferrite or austenite in steel, is also
The deoxidant element of steel-making, but content is unsuitable too high, in order to avoid reducing the toughness of steel.Therefore control in 0.15-0.35%.
Manganese and chromium are all also the important elements improving quenching degree, control manganese content scope to be 0.75-1.10% in the present invention,
Chromium content range is controlled to be 0.95-1.40%.
Sulphur, phosphorus are the harmful elements forming field trash in steel, so should be controlled by, the technical program minimum requirements P≤
0.030%th, S≤0.025%.
A kind of relatively rich element of Peng Shi China, its outstanding role is that micro B just can be multiplied the quenching degree of steel.
For drilling tool steel, the quenching degree increasing steel has great importance, and drilling tool can be made to obtain by phase transformation strengthening higher
Intensity and toughness.Cheap boron replaces expensive chromium can significantly reduce cost.Boron mainly in the segregation of austenite grain boundary, makes Austria
When family name's body decomposes there is difficulty in cenotype forming core at austenite grain boundary, causes the incubation period of austenite decomposition to lengthen, improves through hardening
Property.And the property of boron is more active, the nitrogen in Yi Yugang forms BN compound, the invalid boron of BN phase, claims acid in chemical analysis
Insoluble boron, does not improve the effect of quenching degree.Another plus B steel crack sensitivity is stronger, and in continuous casting cooling procedure, B is combined shape with N
Become BN, separate out in austenite grain boundary, easily cause embrittlement of grain boundaries, cause fire check, the oxidized skin of fire check covers and is difficult to be found,
Cause surface is occurred on finished product round steel to stick up skin defect.
Add trace amount of titanium can fix N in steel in the present invention so that the content of effective boron increases, thus more effectively sending out in steel
Wave the effect that boron closes alloying, improve steel obdurability, meanwhile, the Cracks In Continuous Cast Billets that BN causes can be avoided, eliminate boron alloyed circle
Steel surface sticks up skin defect.
Described oil drilling tools structural alloy steel is for but not limited to manufacture raw material round steel diameter<The brill ship of Φ 190mm,
And/or heavy weight drill pipe.
Compared with prior art, the invention provides a kind of oil drilling tools structural alloy steel, can be used for manufacture raw material
Round steel diameter<The oil drilling tools boring ship, heavy weight drill pipe etc. of Φ 190mm, on the premise of ensureing product quality, are not added with steel holding high
Expensive Mo element, reduces production cost, improves the competitiveness of product in market, and has saved precious metal resource, favorably
Equilibrium in alloy resource uses.The drilling tool product of processing presses API7-1 standard test, Brinell hardness HBW >=285, and normal temperature impacts
Work(AKV >=54J, yield strength, 758MPa, tensile strength >=965MPa, 4 times of diameter elongation between gages rate >=13%, quality is complete
Meet API7-1 standard to require, and using effect and suitable, the even better than Mo drilling tool adding Mo drilling tool.
Specific embodiment
To further illustrate technical scheme with reference to embodiments.
The chemical composition of embodiment 1-5 and comparative example 1 is shown in Table 1, and (heat analysis, remaining is Fe and inevitable impurity unit
Element),
Table 1
The mechanical property (by API7-1 standard test) of the drilling tool that embodiment 1-5 is made with comparative example 1 steel is shown in Table 2.
Table 2
Embodiment 1-5 compares the mechanical property of the drilling tool visible, embodiment 1-5 is made with comparative example 1 respectively and uses feelings
Condition is better than comparative example 1.
Claims (5)
1. a kind of oil drilling tools structural alloy steel it is characterised in that described oil drilling tools structural alloy steel contain following heavy
The composition of amount percentage：
C 0.43-0.48%, Si 0.15-0.35%, Mn 0.75-1.10%, P≤0.030%, S≤0.025%, Cr
0.95-1.40%, B 0.0006-0.0040%, Ti 0.011-0.038%, remaining is iron and inevitable impurity element.
2. oil drilling tools structural alloy steel according to claim 1 is it is characterised in that described oil drilling tools alloy is tied
Structure steel, the composition containing following percentage by weight：
C 0.43-0.48%, Si 0.15-0.35%, Mn 0.85-1.08%, P≤0.025%, S≤0.020%, Cr
1.05-1.10%, B 0.0010-0.0035%, Ti 0.015-0.028%, remaining is iron and inevitable impurity element.
3. oil drilling tools structural alloy steel according to claim 1 is it is characterised in that described oil drilling tools alloy is tied
Structure steel, the composition containing following percentage by weight：
C 0.43-0.48%, Si 0.15-0.35%, Mn 0.95-1.05%, P≤0.025%, S≤0.020%, Cr
1.21-1.31%, B 0.0010-0.0035%, Ti 0.015-0.028%, remaining is iron and inevitable impurity element.
4. oil drilling tools structural alloy steel according to claim 1 is it is characterised in that described oil drilling tools alloy is tied
Structure steel, the composition containing following percentage by weight：
C 0.43-0.48%, Si0.15-0.35%, Mn 1.06-1.10%, P≤0.025%, S≤0.020%, Cr 0.95-
1.04%th, B 0.0010-0.0035%, Ti0.015-0.028%, remaining is iron and inevitable impurity element.
5. a kind of application of oil drilling tools structural alloy steel it is characterised in that for but not limited to manufacture raw material round steel diameter<
The brill ship of Φ 190mm, and/or heavy weight drill pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610954606.8A CN106435362A (en) | 2016-10-27 | 2016-10-27 | Structural alloy steel for petroleum drilling tool and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610954606.8A CN106435362A (en) | 2016-10-27 | 2016-10-27 | Structural alloy steel for petroleum drilling tool and application thereof |
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| Publication Number | Publication Date |
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| CN106435362A true CN106435362A (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610954606.8A Pending CN106435362A (en) | 2016-10-27 | 2016-10-27 | Structural alloy steel for petroleum drilling tool and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218941A (en) * | 2019-06-26 | 2019-09-10 | 河南济源钢铁(集团)有限公司 | A kind of process and structural alloy steel reducing alloy structure steel hardenability |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003166037A (en) * | 2001-11-28 | 2003-06-13 | Japan Marine Sci & Technol Center | Drill pipe and manufacturing method therefor |
| CN102260827A (en) * | 2010-05-26 | 2011-11-30 | 攀钢集团钢铁钒钛股份有限公司 | Drill collar steel and preparation method thereof |
| CN104975235A (en) * | 2015-07-20 | 2015-10-14 | 江阴兴澄特种钢铁有限公司 | High-toughness medium-carbon quenched and tempered round steel of grade 120 KSI and manufacturing method thereof |
-
2016
- 2016-10-27 CN CN201610954606.8A patent/CN106435362A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003166037A (en) * | 2001-11-28 | 2003-06-13 | Japan Marine Sci & Technol Center | Drill pipe and manufacturing method therefor |
| CN102260827A (en) * | 2010-05-26 | 2011-11-30 | 攀钢集团钢铁钒钛股份有限公司 | Drill collar steel and preparation method thereof |
| CN104975235A (en) * | 2015-07-20 | 2015-10-14 | 江阴兴澄特种钢铁有限公司 | High-toughness medium-carbon quenched and tempered round steel of grade 120 KSI and manufacturing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218941A (en) * | 2019-06-26 | 2019-09-10 | 河南济源钢铁(集团)有限公司 | A kind of process and structural alloy steel reducing alloy structure steel hardenability |
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