CN110157980A - A kind of tool joint steel with superior low temperature impact property - Google Patents

A kind of tool joint steel with superior low temperature impact property Download PDF

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Publication number
CN110157980A
CN110157980A CN201910387247.6A CN201910387247A CN110157980A CN 110157980 A CN110157980 A CN 110157980A CN 201910387247 A CN201910387247 A CN 201910387247A CN 110157980 A CN110157980 A CN 110157980A
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CN
China
Prior art keywords
low temperature
tool joint
steel
temperature impact
impact property
Prior art date
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Pending
Application number
CN201910387247.6A
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Chinese (zh)
Inventor
李英奎
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Nanjing Iron and Steel Co Ltd
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Nanjing Iron and Steel Co Ltd
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Priority to CN201910387247.6A priority Critical patent/CN110157980A/en
Publication of CN110157980A publication Critical patent/CN110157980A/en
Pending legal-status Critical Current

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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
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The invention discloses a kind of tool joint steel with superior low temperature impact property, the tool joint passes through addition Nb element with steel, it is formed with disperse and the very high NbC carbide of solution temperature carrys out " pinning " austenite grain boundary and carrys out fining austenite grains degree, autstenitic grain size is increased to 7.5 grades or more from 5 grades of former SAE4137H, improves material at low temperature impact property；Increase the stacking fault energy of material by addition Ni element to improve the low temperature notched sensibility of material, to improve the low temperature impact properties of material.AKV (longitudinal, -20 DEG C) is impacted after this two measures, after tool joint Tempering and Quenching can achieve 90J or more, can satisfy the tool joint design requirement that low temperature environment uses.

Description

A kind of tool joint steel with superior low temperature impact property
Technical field
The present invention relates to a kind of tool joint steel, and in particular to a kind of tool joint with superior low temperature impact property Use steel.
Background technique
SAE4137H manufacture joint of petroleum drill rod is commonly used, the joint of petroleum drill rod using the trade mark steel making makes It is preferable in -30 DEG C~120 DEG C effects with environment, for -30 DEG C~-60 DEG C of low temperature environment, the tool joint which manufactures - 20 DEG C or less ballistic work AKV (longitudinal direction) are generally in 80-90J, hence it is evident that relatively low.The AKV that low temperature environment design requirement is not achieved is (vertical To -20 DEG C) requirement of >=90J, therefore, it is necessary to design a kind of tool joint composition of steel being on active service at low ambient temperatures with full The needs for drilling tool of sufficient cold district oil exploitation.
Summary of the invention
Goal of the invention: in order to overcome the drawbacks of the prior art, the present invention provides a kind of with superior low temperature impact property Tool joint steel, the steel can satisfy the tool joint design requirement that low temperature environment uses.
Technical solution: a kind of tool joint steel with superior low temperature impact property of the present invention, element composition Contain C:0.35-0.38%, Si:0.20-0.30%, Mn:0.85-1.00%, P :≤0.010%, S by percentage to the quality: ≤ 0.005%, Cr:0.90-1.20%, Mo:0.25-0.35%, Ni:0.15-0.25%, Nb:0.02-0.045%, surplus are Fe and inevitable impurity.
Wherein, autstenitic grain size >=7.5 grade of the steel.And it is 110-135J that -20 DEG C of impacts of collision, which absorb function AKV,.
The element design principle of the tool joint steel is as follows:
C: carbon is one of main intensified element in the quenched and tempered steel such as SAE4137H.The steel forms conjunction after Tempering and Quenching The tempered sorbite tissue of golden carbide disperse educt on ferrite, this higher mechanical property of tempered sorbite tissue, There are also good impact flexibility.According to the additional amount of Cr, Mo of the steel, the content of carbon is controlled in 0.35-0.38%.
Cr, Mn, Mo element:
1) harden ability of steel can be improved, through hardening radius can be increased, be the main intensified element of quenched and tempered steel.
2) Cr, Mo are carbide formers, can form alloy carbide with carbon, drawing process after quenching In, alloy carbide disperse educt on ferrite forms tempered sorbite tissue, has preferable mechanical property.
3) Mo plays the role of weakening the temper brittleness of steel.
These three elements, which were added, is then unable to reach above-mentioned technical effect less, is excessively then saturated, and reduces mechanical property and simultaneously mentions Cost has been risen, therefore has been controlled respectively in Cr:0.90-1.20%, Mn:0.85-1.00%, Mo:0.25-0.35%.
Ni and Nb element is the key element of the tool joint steel, and Ni can increase the fault of material to improve material Low temperature notched sensibility, to improve the low temperature impact properties of material, additional amount is very few to be not achieved the effect, and additional amount is excessively then It is saturated and is promoted cost, therefore Ni control is in 0.15-0.25%；Nb is capable of forming with disperse and the very high NbC of solution temperature Carbide carrys out " pinning " austenite grain boundary, thus fining austenite grains, it is 0.02- that the present invention, which explores suitable additional amount, 0.045%.
The utility model has the advantages that tool joint of the invention steel passes through addition Nb element, formation has disperse and solution temperature is very High NbC carbide carrys out " pinning " austenite grain boundary and carrys out fining austenite grains degree, autstenitic grain size from former SAE4137H 5 Grade is increased to 7.5 grades or more, improves material at low temperature impact property；Increase the stacking fault energy of material by addition Ni element to improve The low temperature notched sensibility of material, to improve the low temperature impact properties of material.After this two measures, tool joint is quenched AKV (longitudinal, -20 DEG C) is impacted after heat treatment can achieve 90J or more, can satisfy the tool joint design that low temperature environment uses It is required that.
Specific embodiment
In the following, being described in further details in conjunction with specific embodiments to the present invention.
Embodiment 1: a kind of tool joint steel with superior low temperature impact property, trade mark SAE4137H, element group At by percentage to the quality contain C:0.35, Si:0.30%, Mn:0.85%, P:0.010%, S:0.005%, Cr:1.20%, Mo:0.25%, Ni:0.15%, Nb:0.02%, surplus are Fe and inevitable impurity.The autstenitic grain size of the steel is 7.5 grades, it is 110J that -20 DEG C of impacts of collision, which absorb function AKV, meet the AKV (longitudinal, -20 DEG C) of low temperature environment design requirement >= The requirement of 90J.
Embodiment 2: also providing a kind of tool joint steel that the trade mark is SAE4137H, and element is formed with mass percent Meter contains C:0.38, Si:0.20%, Mn:1.00%, P:0.008%, S:0.003%, Cr:0.90%, Mo:0.35%, Ni: 0.25%, Nb:0.045%, surplus are Fe and inevitable impurity.The autstenitic grain size of the steel is 9 grades, -20 DEG C of longitudinal directions Impact absorbing energy AKV is 118J, meets the requirement of AKV (longitudinal, -20 DEG C) >=90J of low temperature environment design requirement.
Embodiment 3: the tool joint steel that a kind of trade mark is SAE4137H, element composition contain by percentage to the quality C:0.36, Si:0.25%, Mn:0.95%, P:0.008%, S:0.003%, Cr:0.98%, Mo:0.33%, Ni:0.15%, Nb:0.02%, surplus are Fe and inevitable impurity.The autstenitic grain size of the steel is 9 grades, and -20 DEG C of impacts of collision absorb Function AKV is 116J, meets the requirement of AKV (longitudinal, -20 DEG C) >=90J of low temperature environment design requirement.
Embodiment 4: the tool joint steel that a kind of trade mark is SAE4137H, element composition is substantially consistent with embodiment 1, Except that its Ni:0.18%, Nb:0.035%, surplus is Fe and inevitable impurity.The autstenitic grain size of the steel Be 9 grades, it is 129J that -20 DEG C of impacts of collision, which absorb function AKV, meet the AKV (longitudinal, -20 DEG C) of low temperature environment design requirement >= The requirement of 90J.
Embodiment 5: the tool joint steel that a kind of trade mark is SAE4137H, element composition is substantially consistent with embodiment 1, Except that its Ni:0.22%, Nb:0.040%, surplus is Fe and inevitable impurity.The autstenitic grain size of the steel Be 9 grades, it is 135J that -20 DEG C of impacts of collision, which absorb function AKV, meet the AKV (longitudinal, -20 DEG C) of low temperature environment design requirement >= The requirement of 90J.
In addition, a large amount of comparative example is also formed in the conceptual phase of the invention, wherein following four groups can be abundant Embody advantage of the invention.
Comparative example 1: the tool joint steel that a kind of trade mark is SAE4137H, element composition contain C in terms of quality hundred: 0.37%, Si:0.21%, Mn:0.99%, P:0.008%, S:0.003%, Cr:0.92%, Mo:0.34%, Ni:0.06%, Nb:0.045%, surplus are Fe and inevitable impurity.The other elements of the steel in control range of the present invention, but its Ni constituent content is too low.Its autstenitic grain size is 9 grades, and it is 83J that -20 DEG C of impacts of collision, which absorb function AKV, is not able to satisfy low temperature The requirement for AKV (longitudinal, -20 DEG C) >=90J that Environment Design requires.
Comparative example 2: the tool joint steel that a kind of trade mark is SAE4137H, element composition contain C in terms of quality hundred: 0.37, Si:0.25%, Mn:0.99%, P:0.007%, S:0.005%, Cr:0.94%, Mo:0.34%, Ni:0.10%, Nb:0.040%, surplus are Fe and inevitable impurity.The Ni constituent content of the steel is increased, but is controlled with the present invention Range is compared to still on the low side.Its autstenitic grain size is 8 grades, and it is 89J that -20 DEG C of impacts of collision, which absorb function AKV, is not able to satisfy low temperature The requirement for AKV (longitudinal, -20 DEG C) >=90J that Environment Design requires, and not up to corresponding effect.
Comparative example 3: the tool joint steel that a kind of trade mark is SAE4137H, element composition contain C in terms of quality hundred: 0.36, Si:0.27%, Mn:0.90%, P:0.007%, S:0.005%, Cr:0.94%, Mo:0.33%, Ni:0.20%, Nb:0.010%, surplus are Fe and inevitable impurity.Steel Nb constituent content is too low, autstenitic grain size 7.5 Grade, it is 85J that -20 DEG C of impacts of collision, which absorb function AKV, is not able to satisfy AKV (longitudinal, -20 DEG C) >=90J of low temperature environment design requirement Requirement.
Comparative example 4: the tool joint steel that a kind of trade mark is SAE4137H, element composition contain C in terms of quality hundred: 0.36, Si:0.25%, Mn:0.90%, P:0.007%, S:0.005%, Cr:0.93%, Mo:0.33%, Ni:0.20%, Nb:0.012%, surplus are Fe and inevitable impurity.Nb element slightly increases, and the autstenitic grain size of the steel is 8 grades ,- It is 88J that 20 DEG C of impacts of collision, which absorb function AKV, is not able to satisfy AKV (longitudinal, -20 DEG C) >=90J's of low temperature environment design requirement yet It is required that.

Claims (5)

1. a kind of tool joint steel with superior low temperature impact property, which is characterized in that element is formed with mass percent Meter contains C:0.35-0.38%, Si:0.20-0.30%, Mn:0.85-1.00%, P :≤0.010%, S :≤0.005%, Cr: 0.90-1.20%, Mo:0.25-0.35%, Ni:0.15-0.25%, Nb:0.02-0.045%, surplus is for Fe and unavoidably Impurity.
2. the tool joint steel according to claim 1 with superior low temperature impact property, which is characterized in that the member Contain Ni:0.18-0.22%, Nb:0.035-0.040% in element composition.
3. the tool joint steel according to claim 1 with superior low temperature impact property, which is characterized in that austenite Grain size >=7.5 grade.
4. the tool joint steel according to claim 1 with superior low temperature impact property, which is characterized in that -20 DEG C Impact of collision absorbs function AKV >=90J.
5. the tool joint steel according to claim 4 with superior low temperature impact property, which is characterized in that -20 DEG C It is 110-135J that impact of collision, which absorbs function AKV,.
CN201910387247.6A 2019-05-09 2019-05-09 A kind of tool joint steel with superior low temperature impact property Pending CN110157980A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112048669A (en) * 2020-08-28 2020-12-08 南京钢铁股份有限公司 High-strength and high-toughness steel for drill pipe joint and preparation method thereof
CN114574684A (en) * 2021-05-15 2022-06-03 山西风雷钻具有限公司 Method for heat treatment of welding area of mining drill rod

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60138055A (en) * 1983-12-26 1985-07-22 Daido Steel Co Ltd Material for tool joint and drill collar
CN102140610A (en) * 2011-03-08 2011-08-03 上海海隆石油管材研究所 Steel suitable for drill rod joint in low-temperature environment and heat treatment process of steel
CN102424936A (en) * 2011-11-28 2012-04-25 宝山钢铁股份有限公司 Low temperature impact resistance allay structure steel and manufacture method thereof
KR20120134281A (en) * 2011-06-02 2012-12-12 현대자동차주식회사 Microalloy steel having high strength and method for producing the same
CN106282785A (en) * 2016-10-27 2017-01-04 马钢(集团)控股有限公司 A kind of niobium-titanium-boron microalloy fossil oil drill string crossover coupling steel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60138055A (en) * 1983-12-26 1985-07-22 Daido Steel Co Ltd Material for tool joint and drill collar
CN102140610A (en) * 2011-03-08 2011-08-03 上海海隆石油管材研究所 Steel suitable for drill rod joint in low-temperature environment and heat treatment process of steel
KR20120134281A (en) * 2011-06-02 2012-12-12 현대자동차주식회사 Microalloy steel having high strength and method for producing the same
CN102424936A (en) * 2011-11-28 2012-04-25 宝山钢铁股份有限公司 Low temperature impact resistance allay structure steel and manufacture method thereof
CN106282785A (en) * 2016-10-27 2017-01-04 马钢(集团)控股有限公司 A kind of niobium-titanium-boron microalloy fossil oil drill string crossover coupling steel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
邵淑艳等: "油井钻具用SAE4137钢生产实践", 《江西冶金》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112048669A (en) * 2020-08-28 2020-12-08 南京钢铁股份有限公司 High-strength and high-toughness steel for drill pipe joint and preparation method thereof
CN114574684A (en) * 2021-05-15 2022-06-03 山西风雷钻具有限公司 Method for heat treatment of welding area of mining drill rod

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Application publication date: 20190823