CN114574684A - Method for heat treatment of welding area of mining drill rod - Google Patents
Method for heat treatment of welding area of mining drill rod Download PDFInfo
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- CN114574684A CN114574684A CN202110530849.XA CN202110530849A CN114574684A CN 114574684 A CN114574684 A CN 114574684A CN 202110530849 A CN202110530849 A CN 202110530849A CN 114574684 A CN114574684 A CN 114574684A
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- 238000003466 welding Methods 0.000 title claims abstract description 48
- 238000010438 heat treatment Methods 0.000 title claims abstract description 43
- 238000005065 mining Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010791 quenching Methods 0.000 claims abstract description 41
- 230000000171 quenching effect Effects 0.000 claims abstract description 41
- 238000005496 tempering Methods 0.000 claims abstract description 23
- 239000007921 spray Substances 0.000 claims abstract description 11
- 229910052698 phosphorus Inorganic materials 0.000 claims description 11
- 229910052717 sulfur Inorganic materials 0.000 claims description 11
- 229910052729 chemical element Inorganic materials 0.000 claims description 10
- 229910052804 chromium Inorganic materials 0.000 claims description 10
- 229910052748 manganese Inorganic materials 0.000 claims description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Images
Classifications
-
- 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
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
- C21D9/505—Cooling thereof
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Earth Drilling (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a heat treatment method for a welding area of a mining drill rod, which comprises the following steps: respectively carrying out integral quenching and tempering heat treatment on the drill rod joint and the drill rod pipe body, and then connecting the drill rod joint and the drill rod pipe body into a whole by adopting inertia friction welding; quenching a welding area formed by friction welding between the drill rod joint and the drill rod pipe body, wherein the surface temperature of the welding area is less than 40 ℃ after spray quenching; the drill rod after quenching treatment is carried outTempering to obtain a welded zone with yield strength not less than RP0.2724Mpa, the elongation is more than or equal to 13 percent, and the impact energy is more than or equal to 54J. According to the invention, quenching and tempering are carried out on the welded area after welding, and the purposes of grain refinement and higher comprehensive mechanical performance of the welded area of the drill rod are achieved by reasonably matching and controlling the heating temperature, the heating time and the cooling speed, wherein the yield strength of the welded area of the drill rod is not less than RP0.2724Mpa, the elongation is not less than 13%, and the impact energy is not less than 54J.
Description
Technical Field
The invention relates to the technical field of drilling tools, in particular to a heat treatment method for a welding area of a mining drill rod.
Background
The traditional mining drill rod is mainly formed by forming a welding line by a pipe body and a joint through a friction welding process, then a stress relief annealing process is adopted in a welding area of the drill rod, and the strength and the impact toughness of the welding area often cannot meet the drilling requirement.
Disclosure of Invention
In view of this, the invention aims to provide a method for heat treatment of a welding zone of a mining drill rod, and aims to solve the problem that the strength and toughness of the welding zone of the mining drill rod are insufficient in the prior art.
In order to achieve the purpose of the invention, the technical scheme is as follows:
a method for heat treatment of a welding zone of a mining drill rod comprises the following steps:
(1) respectively carrying out integral quenching and tempering heat treatment on the drill rod joint and the drill rod pipe body, and then connecting the drill rod joint and the drill rod pipe body into a whole by adopting inertia friction welding;
(2) quenching a welding area formed by friction welding between the drill rod joint and the drill rod pipe body, wherein the surface temperature of the welding area is less than 40 ℃ after spray quenching;
(3) tempering the drill rod after quenching treatment to obtain a welded zone with yield strength not less than RP0.2724Mpa, the elongation is more than or equal to 13 percent, and the impact energy is more than or equal to 54J.
As a further improvement of the invention, the mass content of the chemical elements in the drill rod joint is as follows: c: 0.35-0.38%, Si: 0.15-0.35%, Mn: 0.85-1.0%, Cr: 0.9-1.2%, Mo: 0.28 to 0.33%, Ni: less than or equal to 0.25 percent, less than or equal to 0.008 percent of S and less than or equal to 0.012 percent of P.
As a further improvement of the invention, the mass content of the chemical elements in the drill pipe body is as follows: c: 0.23-0.28%, Si: 0.17-0.35%, Mn: 1.05-1.2%, Cr: 0.8-1.0%, Mo: 0.15-0.25%, Ni: less than or equal to 0.25 percent, less than or equal to 0.008 percent of S and less than or equal to 0.012 percent of P.
As a further improvement of the invention, the heating temperature of the quenching treatment is 800-.
As a further improvement of the invention, the heating temperature of the quenching treatment is 850 ℃, the holding time is 60S, and the spray quenching time is 40S.
As a further improvement of the invention, the heating temperature of the tempering treatment is 600-800 ℃, and the heat preservation time is 100-120S.
As a further improvement of the invention, the heating temperature of the tempering treatment is 700 ℃, and the holding time is 110S.
As a further improvement of the invention, the outer diameter of the soldering zone is 89mm, and the inner diameter is 70.3 mm.
The invention has the beneficial effects that: the mining drill rod welding area heat treatment method solves the problem that the existing mining drill rod welding area is insufficient in strength and toughness, and prolongs the service life of the mining drill rod. The principle of selecting the joint and the pipe body of the mining drill rod is to strictly control the contents of non-metal impurities, P and S elements and properly improve the content of metal elements beneficial to hardenability. The invention carries out quenching and tempering treatment on the welded area by adopting a quenching and tempering mode, achieves the purposes of grain refinement and higher comprehensive mechanical property of the welded area of the drill rod by reasonably matching and controlling the heating temperature, the heating time and the cooling speed, and ensures that the yield strength of the welded area of the drill rod is more than or equal to RP0.2724Mpa, the elongation is more than or equal to 13 percent, and the impact energy is more than or equal to 54J.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a graph showing the test results of sample 1 of the present invention;
fig. 2 is a graph showing the test results of sample 2 of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example 1
A method for heat treatment of a welding zone of a mining drill rod comprises the following steps:
(1) respectively carrying out integral quenching and tempering heat treatment on the drill rod joint and the drill rod pipe body, and then connecting the drill rod joint and the drill rod pipe body into a whole by adopting inertia friction welding; wherein the mass content of chemical elements in the drill rod joint is as follows: c: 0.35-0.38%, Si: 0.15-0.35%, Mn: 0.85-1.0%, Cr: 0.9-1.2%, Mo: 0.28 to 0.33%, Ni: less than or equal to 0.25 percent, less than or equal to 0.008 percent of S and less than or equal to 0.012 percent of P; the mass content of chemical elements in the drill pipe body is as follows: c: 0.23-0.28%, Si: 0.17-0.35%, Mn: 1.05-1.2%, Cr: 0.8-1.0%, Mo: 0.15-0.25%, Ni: less than or equal to 0.25 percent, less than or equal to 0.008 percent of S and less than or equal to 0.012 percent of P.
(2) Quenching a welding area formed by friction welding between the drill rod joint and the drill rod pipe body, wherein the surface temperature of the welding area is less than 40 ℃ after spray quenching; wherein the heating temperature of the quenching treatment is 850 ℃, the heat preservation time is 60S, and the spray quenching time is 40S.
(3) Tempering the drill rod after quenching treatment to obtain a welded zone with yield strength not less than RP0.2724Mpa, the elongation is more than or equal to 13 percent, and the impact energy is more than or equal to 54J, wherein the heating temperature of the tempering treatment is 700 ℃, and the heat preservation time is 110S.
The outer diameter of the welding area is 89mm, and the inner diameter of the welding area is 70.3 mm.
Example 2
A method for heat treatment of a welding zone of a mining drill rod comprises the following steps:
(1) respectively carrying out integral quenching and tempering heat treatment on the drill rod joint and the drill rod pipe body, and then connecting the drill rod joint and the drill rod pipe body into a whole by inertia friction welding; wherein the mass content of chemical elements in the drill rod joint is as follows: c: 0.35-0.38%, Si: 0.15-0.35%, Mn: 0.85-1.0%, Cr: 0.9-1.2%, Mo: 0.28 to 0.33%, Ni: less than or equal to 0.25 percent, less than or equal to 0.008 percent of S and less than or equal to 0.012 percent of P; the mass content of chemical elements in the drill pipe body is as follows: c: 0.23-0.28%, Si: 0.17-0.35%, Mn: 1.05-1.2%, Cr: 0.8-1.0%, Mo: 0.15-0.25%, Ni: less than or equal to 0.25 percent, less than or equal to 0.008 percent of S and less than or equal to 0.012 percent of P.
(2) Quenching a welding area formed by friction welding between the drill rod joint and the drill rod pipe body, wherein the surface temperature of the welding area is less than 40 ℃ after spray quenching; wherein the heating temperature of the quenching treatment is 800 ℃, the heat preservation time is 40S, and the spray quenching time is 30S.
(3) Tempering the drill rod after quenching treatment to obtain a welded zone with yield strength not less than RP0.2724Mpa, the elongation is more than or equal to 13 percent, and the impact energy is more than or equal to 54J, wherein the heating temperature of the tempering treatment is 600 ℃, and the heat preservation time is 100S.
Example 3
A method for heat treatment of a welding zone of a mining drill rod comprises the following steps:
(1) respectively carrying out integral quenching and tempering heat treatment on the drill rod joint and the drill rod pipe body, and then connecting the drill rod joint and the drill rod pipe body into a whole by adopting inertia friction welding; wherein the mass content of chemical elements in the drill rod joint is as follows: c: 0.35-0.38%, Si: 0.15-0.35%, Mn: 0.85-1.0%, Cr: 0.9-1.2%, Mo: 0.28 to 0.33%, Ni: less than or equal to 0.25 percent, less than or equal to 0.008 percent of S and less than or equal to 0.012 percent of P; the mass content of chemical elements in the drill pipe body is as follows: c: 0.23-0.28%, Si: 0.17-0.35%, Mn: 1.05-1.2%, Cr: 0.8-1.0%, Mo: 0.15-0.25%, Ni: less than or equal to 0.25 percent, less than or equal to 0.008 percent of S and less than or equal to 0.012 percent of P.
(2) Quenching a welding area formed by friction welding between the drill rod joint and the drill rod pipe body, wherein the surface temperature of the welding area is less than 40 ℃ after spray quenching; wherein the heating temperature of the quenching treatment is 900 ℃, the heat preservation time is 80S, and the spray quenching time is 50S.
(3) Tempering the drill rod after quenching treatment to obtain a welded zone with yield strength not less than RP0.2724Mpa, the elongation is more than or equal to 13 percent, and the impact energy is more than or equal to 54J, wherein the heating temperature of the tempering treatment is 800 ℃, and the heat preservation time is 120S.
The performance test of the welding zone of the mining drill rod is shown in the table 1:
TABLE 1 weld zone Performance testing of drill rods
The invention carries out quenching and tempering treatment on the welded area by adopting a quenching and tempering mode, achieves the purposes of grain refinement and higher comprehensive mechanical property of the welded area of the drill rod by reasonably matching and controlling the heating temperature, the heating time and the cooling speed, and ensures that the yield strength of the welded area of the drill rod is more than or equal to RP0.2724Mpa, the elongation is more than or equal to 13 percent, and the impact energy is more than or equal to 54J.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement, component separation or combination and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (8)
1. A method for heat treatment of a welding zone of a mining drill rod is characterized by comprising the following steps:
(1) respectively carrying out integral quenching and tempering heat treatment on the drill rod joint and the drill rod pipe body, and then connecting the drill rod joint and the drill rod pipe body into a whole by adopting inertia friction welding;
(2) quenching a welding area formed by friction welding between the drill rod joint and the drill rod pipe body, wherein the surface temperature of the welding area is less than 40 ℃ after spray quenching;
(3) tempering the drill rod after quenching treatment to obtain a welded zone with yield strength not less than RP0.2724Mpa, the elongation is more than or equal to 13 percent, and the impact energy is more than or equal to 54J.
2. The method for the heat treatment of the welding zone of the mining drill rod as claimed in claim 1, wherein the mass content of chemical elements in the drill rod joint is as follows: c: 0.35-0.38%, Si: 0.15-0.35%, Mn: 0.85-1.0%, Cr: 0.9-1.2%, Mo: 0.28 to 0.33%, Ni: less than or equal to 0.25 percent, less than or equal to 0.008 percent of S and less than or equal to 0.012 percent of P.
3. The mining drill rod weld zone heat treatment method according to claim 1, wherein the mass content of chemical elements in the drill rod pipe body is as follows: c: 0.23-0.28%, Si: 0.17-0.35%, Mn: 1.05-1.2%, Cr: 0.8-1.0%, Mo: 0.15-0.25%, Ni: less than or equal to 0.25 percent, less than or equal to 0.008 percent of S and less than or equal to 0.012 percent of P.
4. The mining drill rod welding zone heat treatment method as claimed in claim 1, wherein the heating temperature of the quenching treatment is 800-.
5. The mining drill rod weld zone heat treatment method according to claim 4, characterized in that the heating temperature of the quenching treatment is 850 ℃, the holding time is 60S, and the spray quenching time is 40S.
6. The method as claimed in claim 1, wherein the heating temperature of the tempering treatment is 600-800 ℃, and the heat preservation time is 100-120S.
7. The mining drill rod welding area heat treatment method according to claim 6, wherein the heating temperature of the tempering treatment is 700 ℃ and the holding time is 110S.
8. The method for heat treatment of the weld zone of the mining drill rod as claimed in claim 1, wherein the outer diameter of the weld zone is 89mm, and the inner diameter of the weld zone is 70.3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110530849.XA CN114574684A (en) | 2021-05-15 | 2021-05-15 | Method for heat treatment of welding area of mining drill rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110530849.XA CN114574684A (en) | 2021-05-15 | 2021-05-15 | Method for heat treatment of welding area of mining drill rod |
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| CN114574684A true CN114574684A (en) | 2022-06-03 |
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Citations (8)
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|---|---|---|---|---|
| CN101649376A (en) * | 2008-08-14 | 2010-02-17 | 江阴兴鼎石油管件有限公司 | Deformation heat treatment method of petroleum drill pipe friction welding joint |
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| CN102399970A (en) * | 2011-11-18 | 2012-04-04 | 中国石油集团渤海石油装备制造有限公司 | Heat treatment method for V150 steel grade drill rod welded seam |
| CN103014306A (en) * | 2012-12-14 | 2013-04-03 | 中国石油集团长城钻探工程有限公司工程服务公司 | Novel heat treatment process of drilling rod welding line of bainite/martensite mixed steel material |
| CN105803162A (en) * | 2016-06-08 | 2016-07-27 | 中国石油集团渤海石油装备制造有限公司 | 165-steel-grade drill rod weld joint heat treatment method |
| CN106319353A (en) * | 2016-09-26 | 2017-01-11 | 山西风雷钻具有限公司 | Geological drill rod and manufacturing method thereof |
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2021
- 2021-05-15 CN CN202110530849.XA patent/CN114574684A/en active Pending
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| CN102399970A (en) * | 2011-11-18 | 2012-04-04 | 中国石油集团渤海石油装备制造有限公司 | Heat treatment method for V150 steel grade drill rod welded seam |
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| CN105803162A (en) * | 2016-06-08 | 2016-07-27 | 中国石油集团渤海石油装备制造有限公司 | 165-steel-grade drill rod weld joint heat treatment method |
| CN106319353A (en) * | 2016-09-26 | 2017-01-11 | 山西风雷钻具有限公司 | Geological drill rod and manufacturing method thereof |
| CN110157980A (en) * | 2019-05-09 | 2019-08-23 | 南京钢铁股份有限公司 | A kind of tool joint steel with superior low temperature impact property |
| 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 |
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