CN118086786B - Seamless steel tube perforating plug and preparation method thereof - Google Patents
Seamless steel tube perforating plug and preparation method thereof Download PDFInfo
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- CN118086786B CN118086786B CN202410510822.8A CN202410510822A CN118086786B CN 118086786 B CN118086786 B CN 118086786B CN 202410510822 A CN202410510822 A CN 202410510822A CN 118086786 B CN118086786 B CN 118086786B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 26
- 239000010959 steel Substances 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 54
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 25
- 239000011733 molybdenum Substances 0.000 claims abstract description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 23
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 22
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 21
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 20
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052796 boron Inorganic materials 0.000 claims abstract description 20
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 20
- 239000011651 chromium Substances 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 20
- 238000005266 casting Methods 0.000 claims abstract description 11
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 6
- 238000007670 refining Methods 0.000 claims description 33
- 229910045601 alloy Inorganic materials 0.000 claims description 28
- 239000000956 alloy Substances 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 23
- 238000002844 melting Methods 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 14
- 230000032683 aging Effects 0.000 claims description 13
- 238000003754 machining Methods 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 8
- 244000035744 Hura crepitans Species 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 230000002431 foraging effect Effects 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 4
- 238000003723 Smelting Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000004663 powder metallurgy Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 17
- 239000000047 product Substances 0.000 description 9
- 229910000765 intermetallic Inorganic materials 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 229910000997 High-speed steel Inorganic materials 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005495 investment casting Methods 0.000 description 2
- 229910001068 laves phase Inorganic materials 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000010301 surface-oxidation reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000001550 time effect Effects 0.000 description 1
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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with 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
-
- 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)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a seamless steel tube piercing plug and a preparation method thereof, and relates to the technical field of piercing plugs. The technical proposal is as follows: the composite material consists of the following elements in percentage by mass: 15-16% of chromium, 14-15% of molybdenum, 5-6% of aluminum, 0.1-0.2% of boron, 0.05-0.1% of zirconium and the balance of iron. The microstructure of the piercing plug prepared by the invention is composed of a strip-shaped Fe 2 Mo precipitated phase and an alpha-Fe precipitated phase, the Fe 2 Mo precipitated phase improves the wear resistance of the piercing plug, and the piercing plug is molded in a precise casting mode, so that the piercing plug has the advantages of simplicity, convenience and high efficiency compared with a powder metallurgy production process.
Description
Technical Field
The invention relates to the technical field of perforating plugs, in particular to a seamless steel tube perforating plug and a preparation method thereof.
Background
Since 1966, as-cast molybdenum-based plugs have been widely used as replacements for die steel or tool steel plugs in the past. However, as the as-cast molybdenum-based plug has coarse and uneven grains, the plasticity is poor and the service life is short; meanwhile, the ingot casting processing and forming also has the problems of more metal chips, longer production period, high cost and the like. In order to overcome the defects of the as-cast molybdenum-based plug in the aspects of technology, performance and the like, after the last 70 th century, the stainless steel seamless tube is pierced by trial production and investment in powder metallurgy of the molybdenum-based alloy plug (molybdenum plug for short). With the improvement of the preparation process, the current alloy for preparing the perforating plug has various types. The Chinese patent CN111793773A discloses a high-speed steel which is subjected to strong hardening through Laves phase and mu phase compounding, wherein in the time-effect stage, a nano-scale intermetallic compound mu generated by precipitation in a matrix generates strong coherent strain with the same matrix, so that the material is rapidly hardened, and the wear-resistant micro-scale primary mu phase and Laves phase are matched to endow the material with overall excellent performance; the in-situ generated refractory element-rich precipitated phase has high diffusion activation energy and good thermal stability, and the material has excellent high-temperature red hardness and hot hardness. However, when the carbon-free high-speed steel is subjected to strong stress at high temperature, the internal phase change of the material is caused, and the hardness of the material is reduced.
The Chinese patent No. 114561596A discloses a carbon-free high-speed steel perforating plug which is strongly hardened by intermetallic compounds and a preparation method thereof, wherein a carbon-free high-speed steel matrix comprises mu-phase intermetallic compounds and sigma-phase intermetallic compounds, the carbon-free high-speed steel perforating plug is prepared from raw materials containing metal powder through casting, forging, surface oxidation, surface reduction treatment and other processes, the obtained perforating plug realizes compound strengthening by utilizing the mu-phase and sigma-phase intermetallic compounds, and meanwhile, a surface oxidation film with excellent high-temperature strong combination effect and heat insulation and lubrication effect is generated on the surface of the perforating plug, the performance index of the perforating plug is greatly improved under the synergistic effect of the mu-phase intermetallic compounds and the sigma-phase intermetallic compounds, and the perforating plug has higher industrial application value. However, the patent adopts a powder metallurgy method for preparation, and the procedures and the operations are complicated.
In summary, development of new formulations and matched preparation methods for piercing plug to further enhance the quality of piercing plug is still a hot point of research.
Disclosure of Invention
The invention aims to solve the technical problems that: the invention overcomes the defects of the prior art, and provides the seamless steel tube piercing plug and the preparation method thereof, the microstructure of the prepared piercing plug is composed of a strip-shaped Fe 2 Mo precipitated phase and an alpha-Fe precipitated phase, the Fe 2 Mo precipitated phase improves the wear resistance of the piercing plug, and the piercing plug is molded in a precision casting mode, so that the seamless steel tube piercing plug has the advantages of simplicity, convenience and high efficiency compared with the powder metallurgy production process.
The technical scheme of the invention is as follows:
On one hand, the invention provides a seamless steel tube piercing plug, which comprises the following elements in percentage by mass: 15-16% of chromium, 14-15% of molybdenum, 5-6% of aluminum, 0.1-0.2% of boron, 0.05-0.1% of zirconium and the balance of iron.
Preferably, the alloy consists of the following elements in percentage by mass: 15.5% of chromium, 14.5% of molybdenum, 5.6% of aluminum, 0.15% of boron, 0.08% of zirconium and the balance of iron.
Preferably, the alloy consists of the following elements in percentage by mass: 15% of chromium, 14% of molybdenum, 5% of aluminum, 0.1% of boron, 0.05% of zirconium and the balance of iron.
Preferably, the alloy consists of the following elements in percentage by mass: 16% of chromium, 15% of molybdenum, 6% of aluminum, 0.2% of boron, 0.1% of zirconium and the balance of iron.
On the other hand, the invention also provides a preparation method of the seamless steel tube piercing plug, which comprises the following steps:
S1, preparing a master alloy ingot by a vacuum melting furnace: placing chromium, molybdenum and iron raw materials into a magnesia crucible of a vacuum smelting furnace for refining, wherein the refining temperature is 1630-1650 ℃, the refining time is 40-50min, after refining is finished, power is cut off, cooling is performed to the surface of molten steel for forming a film, power is transmitted, and pouring is performed after the temperature of the molten steel is raised to 1580-1600 ℃, so as to obtain a master alloy ingot;
S2 remelting a master alloy ingot: remelting the master alloy ingot obtained in the step S1 by adopting a vacuum melting furnace, wherein the refining temperature is 1580-1600 ℃, the refining time is 5-10min, then cutting off power, cooling to 1430-1450 ℃, adding aluminum, boron and zirconium raw materials, heating to 1580-1600 ℃, stirring for 2-3min, and then pouring to obtain a perforated top;
S3, aging heat treatment: after casting, placing the sand box with the embedded perforating plug into a resistance furnace for aging heat treatment, wherein the temperature is 750-800 ℃, and the heat preservation time is 10-12 hours;
s4, machining: and machining the perforated plug subjected to aging heat treatment, and machining the perforated plug into the product size.
Preferably, the microstructure of the prepared piercing plug comprises an alpha-Fe precipitated phase and an elongated Fe 2 Mo precipitated phase.
Compared with the prior art, the invention has the following beneficial effects:
The invention adopts a vacuum melting furnace to prepare a master alloy ingot, then remelts the master alloy ingot to pour the perforating plug, and the perforating plug is subjected to aging heat treatment and machining to form a finished product. The microstructure of the piercing plug prepared by the invention is composed of a strip-shaped Fe 2 Mo precipitated phase and an alpha-Fe precipitated phase, and the Fe 2 Mo precipitated phase improves the wear resistance of the alloy. The perforated plug is molded in a precision casting mode, and has the advantages of simplicity, convenience and high efficiency compared with the powder metallurgy production process.
Drawings
FIG. 1 is a metallographic photograph of a piercing plug prepared in example 1 of the present invention.
FIG. 2 is a scanning electron micrograph of a piercing plug prepared in example 1 of the present invention.
In the figure, 1 is a Fe 2 Mo precipitate phase, and 2 is an alpha-Fe precipitate phase.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention.
All raw materials used in the examples of the invention are commercially available products except for the specific descriptions.
Example 1
The piercing plug of this embodiment is composed of the following elements in mass percent: 15.5% of chromium, 14.5% of molybdenum, 5.6% of aluminum, 0.15% of boron, 0.08% of zirconium and the balance of iron.
The preparation method of the perforating plug of the embodiment comprises the following steps:
S1, preparing a master alloy ingot by a vacuum melting furnace: putting chromium, molybdenum and iron raw materials into a magnesium oxide crucible of a 200kg vacuum melting furnace for refining, wherein the refining temperature is 1640 ℃, the refining time is 45min, after refining is finished, cooling to a molten steel surface film in a power cut mode, transmitting power, and pouring after the molten steel temperature is raised to 1590 ℃, so as to obtain a master alloy ingot;
S2 remelting a master alloy ingot: remelting the master alloy ingot cast in the step S1 by adopting a 200kg vacuum melting furnace, wherein the refining temperature is 1590 ℃, the refining time is 8min, then cutting off power, cooling to 1440 ℃, adding aluminum, boron and zirconium raw materials, heating to 1590 ℃, stirring for 3min, and then casting to obtain a perforated top;
S3, aging heat treatment: after casting, placing the sand box with the embedded perforating plug into a resistance furnace for aging heat treatment, wherein the temperature is 780 ℃, and the heat preservation time is 11 hours;
s4, machining: and machining the perforated plug subjected to aging heat treatment to obtain a proper size.
Fig. 1-2 are a metallographic photograph and a scanning electron microscope photograph of the piercing plug prepared in this embodiment, respectively, and as can be seen from fig. 1-2, the precipitated phases of the piercing plug prepared in embodiment 1 include an α -Fe precipitated phase and a long-strip Fe 2 Mo precipitated phase, wherein the long-strip Fe 2 Mo precipitated phase is mainly used, and the precipitated phases have good wear resistance, so that the number of times of use of the piercing plug can be effectively increased.
Example 2
The piercing plug of this embodiment is composed of the following elements in mass percent: 15% of chromium, 14% of molybdenum, 5% of aluminum, 0.1% of boron, 0.05% of zirconium and the balance of iron.
The preparation method of the perforating plug of the embodiment comprises the following steps:
S1, preparing a master alloy ingot by a vacuum melting furnace: putting chromium, molybdenum and iron raw materials into a magnesia crucible of a 200kg vacuum melting furnace for refining, wherein the refining temperature is 1630 ℃, the refining time is 40min, after refining is finished, cooling to the surface of molten steel for film formation in a power failure, transmitting electricity, and pouring when the temperature of the molten steel is raised to 1580 ℃, thus obtaining a master alloy ingot;
S2 remelting a master alloy ingot: remelting the master alloy ingot cast in the step S1 by adopting a 200kg vacuum melting furnace, wherein the refining temperature is 1580 ℃, the refining time is 5min, then, cutting off power, cooling to 1430 ℃, adding aluminum, boron and zirconium raw materials, heating to 1580 ℃, stirring for 2min, and then casting to obtain a perforated top;
s3, aging heat treatment: after casting, placing the sand box with the embedded perforating plug into a resistance furnace for aging heat treatment, wherein the temperature is 750 ℃, and the heat preservation time is 10 hours;
s4, machining: and machining the perforated plug subjected to aging heat treatment to obtain a proper size.
Example 3
The piercing plug of this embodiment is composed of the following elements in mass percent: 16% of chromium, 15% of molybdenum, 6% of aluminum, 0.2% of boron, 0.1% of zirconium and the balance of iron.
The preparation method of the perforating plug of the embodiment comprises the following steps:
S1, preparing a master alloy ingot by a vacuum melting furnace: putting chromium, molybdenum and iron raw materials into a magnesium oxide crucible of a 200kg vacuum melting furnace for refining, wherein the refining temperature is 1650 ℃, the refining time is 50min, after refining is finished, cooling to a molten steel surface film in a power cut mode, transmitting power, and pouring after the molten steel temperature is raised to 1600 ℃, so as to obtain a master alloy ingot;
S2 remelting a master alloy ingot: remelting the master alloy ingot cast in the step S1 by adopting a 200kg vacuum melting furnace, wherein the refining temperature is 1600 ℃, the refining time is 10min, then cutting off power, cooling to 1450 ℃, adding aluminum, boron and zirconium raw materials, heating to 1600 ℃, stirring for 3min, and then casting to obtain a perforated top;
S3, aging heat treatment: after casting, placing the sand box with the embedded perforating plug into a resistance furnace for aging heat treatment at 800 ℃ for 12 hours;
s4, machining: and machining the perforated plug subjected to aging heat treatment to obtain a proper size.
Comparative example 1
The difference from example 1 is that the piercing tip consists of the following elements in mass percent: 15.5% of chromium, 5.6% of aluminum, 0.15% of boron, 0.08% of zirconium and the balance of iron.
Comparative example 2
The difference from example 1 is that the piercing tip consists of the following elements in mass percent: 15.5% of chromium, 14.5% of molybdenum, 0.15% of boron, 0.08% of zirconium and the balance of iron.
Comparative example 3
The difference from example 1 is that the piercing tip consists of the following elements in mass percent: 15.5% of chromium, 14.5% of molybdenum, 5.6% of aluminum, 0.15% of boron and the balance of iron.
Comparative example 4
The difference from example 1 is that the piercing tip consists of the following elements in mass percent: 15.5% of chromium, 14.5% of molybdenum, 4.5% of aluminum, 0.15% of boron, 0.08% of zirconium and the balance of iron.
Comparative example 5
The difference from example 1 is that the piercing tip consists of the following elements in mass percent: 15.5% of chromium, 12% of molybdenum, 5.6% of aluminum, 0.15% of boron, 0.08% of zirconium and the balance of iron.
Comparative example 6
The difference from example 1 is that in step S1, the refining temperature is 1600 ℃; in step S2, the refining temperature was 1570 ℃.
Comparative example 7
The difference from example 1 is that the aging heat treatment of step S3 is not performed.
The perforated plug products prepared in examples 1 to 3 and comparative examples 1 to 7 were tested for the number of times of use under the condition of piercing a seamless steel pipe with the conventional perforated plug product made of 20CrNi4W, H material, and each perforated plug product was tested three times, and the test results are shown in table 1:
Table 1 results of test of number of times of use of piercing plugs of examples 1 to 3 and comparative examples 1 to 7
As can be seen from Table 1, compared with the conventional perforated plug products made of 20CrNi4W and H13 materials, the perforated plug prepared by the preparation method of the invention has more use times when penetrating seamless steel pipes, and the more use times when penetrating seamless steel pipes, the more economic benefits the product has. Meanwhile, the piercing plugs prepared in examples 1 to 3 were used more frequently when piercing seamless steel pipes than the piercing plugs prepared in comparative examples 1 to 7. This is because in comparative example 1, the components of the piercing plug do not contain molybdenum, so that it cannot form a Fe 2 Mo precipitated phase, resulting in a decrease in the number of times of use of the produced piercing plug product; similarly, in comparative example 5, less molybdenum element was added to the piercing plug, so that less Fe 2 Mo precipitate was formed, which also resulted in a reduction in the number of times the piercing plug was used. In comparative example 2, aluminum is not added to the piercing plug, and aluminum element can form aluminum oxide with oxygen, so that the oxidation resistance is mainly achieved, and the use times of the piercing plug are reduced when aluminum element is not added to the piercing plug; similarly, in comparative example 4, when the aluminum content of the piercing plug is low, the number of times of use of the piercing plug is also reduced. In comparative example 3, zirconium is not contained in the components of the piercing plug, but zirconium mainly plays a role of strengthening grain boundaries, and strength of the piercing plug can be improved, so that the number of times of use of the piercing plug can be reduced when zirconium is not added in comparative example 3. In comparative examples 6 to 7, the homogenization and diffusion of the molybdenum element were not facilitated when refining at low temperature or not using aging heat treatment, and the number of times of use of the piercing plug was reduced.
Claims (2)
1. The seamless steel tube perforating plug is characterized by comprising the following elements in percentage by mass: 15-16% of chromium, 14-15% of molybdenum, 5-6% of aluminum, 0.1-0.2% of boron, 0.05-0.1% of zirconium and the balance of iron;
The preparation method of the seamless steel tube piercing plug comprises the following steps:
S1, preparing a master alloy ingot by a vacuum melting furnace: placing chromium, molybdenum and iron raw materials into a magnesia crucible of a vacuum smelting furnace for refining, wherein the refining temperature is 1630-1650 ℃, the refining time is 40-50min, after refining is finished, power is cut off, cooling is performed to the surface of molten steel for forming a film, power is transmitted, and pouring is performed after the temperature of the molten steel is raised to 1580-1600 ℃, so as to obtain a master alloy ingot;
S2 remelting a master alloy ingot: remelting the master alloy ingot obtained in the step S1 by adopting a vacuum melting furnace, wherein the refining temperature is 1580-1600 ℃, the refining time is 5-10min, then cutting off power, cooling to 1430-1450 ℃, adding aluminum, boron and zirconium raw materials, heating to 1580-1600 ℃, stirring for 2-3min, and then pouring to obtain a perforated top;
S3, aging heat treatment: after casting, placing the sand box with the embedded perforating plug into a resistance furnace for aging heat treatment, wherein the temperature is 750-800 ℃, and the heat preservation time is 10-12 hours;
S4, machining: machining the perforated plug subjected to aging heat treatment, and machining the perforated plug into a product size;
The microstructure of the prepared piercing plug comprises an alpha-Fe precipitated phase and a strip Fe 2 Mo precipitated phase.
2. The seamless steel tube piercing plug according to claim 1, which is composed of the following elements in percentage by mass: 15.5% of chromium, 14.5% of molybdenum, 5.6% of aluminum, 0.15% of boron, 0.08% of zirconium and the balance of iron.
Priority Applications (1)
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| CN102409255A (en) * | 2011-08-15 | 2012-04-11 | 山东瑞泰新材料科技有限公司 | Alloy with insulated surface and preparation process thereof |
| CN103160749A (en) * | 2013-02-07 | 2013-06-19 | 宁波市鄞州文昌金属制品有限公司 | Seamless steel pipe perforating plug and manufacture method |
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| US2987394A (en) * | 1959-03-25 | 1961-06-06 | John J Mueller | Iron-aluminum base alloys |
| US11242581B2 (en) * | 2014-12-17 | 2022-02-08 | Uddeholms Ab | Wear resistant alloy |
| US11497085B2 (en) * | 2018-01-30 | 2022-11-08 | Jfe Steel Corporation | Fe—Cr alloy, method for producing same, and resistance heating element |
| CN115595515A (en) * | 2022-10-14 | 2023-01-13 | 长沙理工大学（Cn） | High-strength and high-toughness corrosion-resistant high-entropy steel plate and preparation method thereof |
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| CN102409255A (en) * | 2011-08-15 | 2012-04-11 | 山东瑞泰新材料科技有限公司 | Alloy with insulated surface and preparation process thereof |
| CN103160749A (en) * | 2013-02-07 | 2013-06-19 | 宁波市鄞州文昌金属制品有限公司 | Seamless steel pipe perforating plug and manufacture method |
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