CN115772635A - Cr25Ni20Si2 heat-resistant steel bar and manufacturing method thereof - Google Patents
Cr25Ni20Si2 heat-resistant steel bar and manufacturing method thereof Download PDFInfo
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- CN115772635A CN115772635A CN202211479144.0A CN202211479144A CN115772635A CN 115772635 A CN115772635 A CN 115772635A CN 202211479144 A CN202211479144 A CN 202211479144A CN 115772635 A CN115772635 A CN 115772635A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 48
- 239000010959 steel Substances 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 12
- 238000003723 Smelting Methods 0.000 claims abstract description 6
- 238000007670 refining Methods 0.000 claims description 21
- 238000005242 forging Methods 0.000 claims description 12
- 238000005096 rolling process Methods 0.000 claims description 12
- 238000000137 annealing Methods 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004513 sizing Methods 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000005098 hot rolling Methods 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 abstract description 18
- 239000000956 alloy Substances 0.000 abstract description 18
- 229910052751 metal Inorganic materials 0.000 abstract description 15
- 239000002184 metal Substances 0.000 abstract description 14
- 238000005260 corrosion Methods 0.000 abstract description 11
- 230000007797 corrosion Effects 0.000 abstract description 11
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011651 chromium Substances 0.000 abstract description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052804 chromium Inorganic materials 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 0.000 description 1
Classifications
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- 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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Abstract
The invention relates to the technical field of bars and discloses a Cr25Ni20Si2 heat-resistant steel bar which is characterized by comprising the following elements in percentage by weight: c:0.18%, si:1.60 to 2.40 percent; mn:1.40 percent; p:0.030 percent; s:0.025 percent; cr:24.50 to 26.50 percent; ni:18.50 to 20.50 percent; zr:0.90 to 1.75 percent; the balance of Fe, the invention adopts vacuum smelting, can minimize the gas content in the metal, can prevent the metal from being oxidized, does not need subsequent electroslag remelting to improve the metal purity, greatly simplifies the manufacturing process and reduces the cost of enterprises; the addition of each element is reasonably controlled, and the zirconium element is added, so that the zirconium element can fully exert good corrosion resistance in the alloy, and a product processed by the alloy can be used in a special corrosive environment; the Cr element is added, the chromium has ductility and high corrosion resistance, and the oxidation is slow even in a red hot state, so that the corrosion resistance of the alloy is ensured.
Description
Technical Field
The invention relates to the technical field of bars, in particular to a Cr25Ni20Si2 heat-resistant steel bar and a manufacturing method thereof.
Background
The bar is an important economic steel, is one of important raw materials for national defense and national economic construction, and is widely applied to the fields of petroleum, military industry, aerospace, aviation, nuclear energy, ships, geology, chemical engineering, automobiles, machinery and the like. With the rapid development of modern industry, the requirements on the variety and quality of bars are higher and higher, so that the development of steel pipe production is emphasized in all countries in the world. The improvement is open, the bar industry in China is rapidly developed, and meanwhile, the method catches up with the pace of the bar production technology progress in the world.
The alloy is macroscopically uniform, contains a multi-component chemical substance of metal elements, generally has the metal characteristic, any element can be used as an alloy element, but a large amount of metal is still added, the most basic and independent substances forming the alloy are called components or simply called components, the alloy formed by two components is called binary alloy, the alloy formed by three components is called ternary alloy, the alloy formed by more than three components is called multi-component alloy, and in the solid state, the alloy can be in a single phase or a mixture of multiple phases.
After the existing Cr25Ni20Si2 heat-resistant steel bar is smelted, metal contains gas, so that the metal is oxidized, electroslag remelting is needed to improve the purity of the metal, the manufacturing process is complicated, the cost is high, the dosage of various elements in the Cr25Ni20Si2 heat-resistant steel bar is not controlled well, the corrosion resistance of the alloy can be influenced, and a product processed by the steel bar cannot be used in a corrosive special environment due to poor corrosion resistance.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a Cr25Ni20Si2 heat-resistant steel rod material and a method for manufacturing the same.
In order to achieve the purpose of the invention, the Cr25Ni20Si2 heat-resistant steel bar comprises the following elements in percentage by weight: c:0.18%, si:1.60 to 2.40 percent; mn:1.40 percent; p:0.030%; s:0.025 percent; cr:24.50 to 26.50 percent; ni:18.50 to 20.50 percent; zr:0.90 to 1.75 percent; the balance being Fe.
Preferably, the rod comprises the following elements in percentage by weight: c:0.18%, si:1.60 percent; mn:1.40 percent; p:0.009%; s:0.025 percent; cr:24.50 percent; ni:20.50 percent; zr:0.90 percent; the balance being Fe.
Preferably, the rod comprises the following elements in percentage by weight: c:0.08%, si:2.00 percent; mn:0.90 percent; p:0.015%; s:0.015 percent; cr:25.50 percent; ni:19.50 percent; zr:1.25 percent; the balance being Fe.
Preferably, the bar comprises the following elements in percentage by weight: c:0.13%, si:2.40 percent; mn:0.40 percent; p:0.030 percent; s:0.005 percent; cr:26.50 percent; ni:18.50 percent; zr:1.75 percent; the balance being Fe.
A manufacturing method of a Cr25Ni20Si2 heat-resistant steel bar comprises the following steps:
a. vacuum smelting:
(1) All metal materials are required to meet the quality standard and are used after being baked according to a system, and the addition amount of each element is strictly controlled by the ingredients;
(2) The vacuum degree in the melting period is less than 7Pa, small Ni, al and Zr materials are added during refining, and the small Ni, al and Zr materials are added when the film is formed after the refining is stopped, and the components are controlled;
(3) The vacuum degree in the refining period is less than or equal to 7Pa, at least two times of high-temperature instantaneous refining and one time of low-temperature long-time refining are adopted, the steel temperature is raised to 1420 ℃/1-2min, the steel temperature is lowered to 1320 ℃ (the steel film is just formed and the film is washed), and the refining time is more than or equal to 35min;
(4) The refining temperature is 1640 ℃, argon can not be filled in the whole process, the tapping temperature is 1740 ℃, 240Kg of round steel ingot is poured, after the late pouring, feeding is sufficient, and steel ingot is covered by sand and slowly cooled to be below 90 ℃ for marking and forging.
b. Forging: heating the bar steel at a heating temperature of 1240 ℃ for 40 minutes; hot forging the heated bar steel at a finish rolling temperature of 960 ℃ or higher;
c. cutting and annealing: cutting the forged blank by a cutting machine after forging, and then entering an annealing process, wherein the annealing temperature is 1060 ℃;
d. hot rolling:
(1) Heating at 1180-1180 deg.c for 30 min;
(2) The initial rolling temperature is more than or equal to 1140 ℃, and the final rolling temperature is more than or equal to 940 ℃;
(3) Rolling specification phi 16mm, and sizing a straight bar L =4000mm.
e. Peeling:
and (3) peeling a straight bar with the diameter of 16.0mm to the diameter of 16.0+0.3mm, and fixing the length of L =4000-5mm per bar.
Compared with the prior art, the Cr25Ni20Si2 heat-resistant steel bar and the manufacturing method thereof designed by the invention have the following advantages:
1. the Cr25Ni20Si2 heat-resistant steel bar and the manufacturing method thereof adopt vacuum smelting, can minimize the gas content in metal, can prevent the metal from being oxidized, do not need subsequent electroslag remelting to improve the metal purity, greatly simplify the manufacturing process and reduce the cost of enterprises.
2. According to the Cr25Ni20Si2 heat-resistant steel bar and the manufacturing method thereof, the addition amount of each element is reasonably controlled, and the zirconium element is added, so that the zirconium element can fully exert good corrosion resistance in the alloy, and a product processed from the alloy can be used in a corrosive special environment.
3. The Cr25Ni20Si2 heat-resistant steel bar and the manufacturing method thereof are characterized in that Cr is added, the Cr has ductility and high corrosion resistance, and the oxidation is slow in air even in a red hot state, so that the corrosion resistance of the alloy can be ensured.
4. The Cr25Ni20Si2 heat-resistant steel bar and the manufacturing method thereof have the advantages of concise manufacturing process steps, low cost and convenient popularization.
Drawings
None.
Detailed Description
In order to further understand the objects, structures, features, and functions of the present invention, the following embodiments are described in detail.
Example 1:
a Cr25Ni20Si2 heat-resistant steel bar comprises the following elements in percentage by weight: c:0.18%, si:1.60 percent; mn:1.40 percent; p:0.009%; s:0.025 percent; cr:24.50 percent; ni:20.50 percent; zr:0.90 percent; the balance being Fe.
Example 2:
a Cr25Ni20Si2 heat-resistant steel bar comprises the following elements in percentage by weight: c:0.08%, si:2.00 percent; mn:0.90 percent; p:0.015 percent; s:0.015 percent; cr:25.50 percent; ni:19.50 percent; zr:1.25 percent; the balance being Fe.
Example 3:
a Cr25Ni20Si2 heat-resistant steel bar comprises the following elements in percentage by weight: c:0.13%, si:2.40 percent; mn:0.40 percent; p:0.030 percent; s:0.005 percent; cr:26.50 percent; ni:18.50 percent; zr:1.75 percent; the balance being Fe.
The preparation processes of the Cr25Ni20Si2 heat-resistant steel bars of the three embodiments include the following steps:
a manufacturing method of a Cr25Ni20Si2 heat-resistant steel bar comprises the following steps:
a. vacuum smelting:
(1) All metal materials are required to meet the quality standard and are used after being baked according to a system, and the addition amount of each element is strictly controlled by the ingredients;
(2) The vacuum degree in the melting period is less than 7Pa, small Ni, al and Zr materials are added during refining, and the small Ni, al and Zr materials are added when the film is formed after the refining is stopped, and the components are controlled;
(3) The vacuum degree in the refining period is less than or equal to 7Pa, at least two times of high-temperature instantaneous refining and one time of low-temperature long-time refining are adopted, the steel temperature is raised to 1420 ℃/1-2min, the steel temperature is lowered to 1320 ℃ (the steel film is just formed and the film is washed), and the refining time is more than or equal to 35min;
(4) The refining temperature is 1640 ℃, argon can not be filled in the whole process, the tapping temperature is 1740 ℃, 240Kg of round steel ingot is poured, after the late pouring, feeding is sufficient, and steel ingot is covered by sand and slowly cooled to be below 90 ℃ for marking and forging.
b. Forging: heating the bar steel at a heating temperature of 1240 ℃ for 40 minutes; hot forging the heated bar steel at a finish rolling temperature of 960 ℃ or higher;
c. cutting and annealing: cutting the forged blank by using a cutting machine after forging, and then entering an annealing process, wherein the annealing temperature is 1060 ℃;
d. hot rolling:
(1) Heating at 1180-1180 deg.c for 30 min;
(2) The initial rolling temperature is more than or equal to 1140 ℃, and the final rolling temperature is more than or equal to 940 ℃;
(3) Rolling specification phi 16mm, and sizing the straight bar L =4000mm.
e. Peeling:
peeling phi 16.0+0.3mm from a straight bar with phi 16.0mm, and sizing L =4000-5 mm/bar.
According to the invention, vacuum smelting is adopted, so that the gas content in the metal can be minimized, the metal can be prevented from being oxidized, the subsequent electroslag remelting is not needed to improve the metal purity, the manufacturing process is greatly simplified, and the cost of an enterprise is reduced; the addition of each element is reasonably controlled, and the zirconium element is added, so that the zirconium element can fully exert good corrosion resistance in the alloy, and a product processed by the alloy can be used in a special corrosive environment; the Cr element is added, the chromium has ductility and high corrosion resistance, and is slowly oxidized in air even in a red hot state, so that the corrosion resistance of the alloy can be ensured; the manufacturing process has simple steps, low cost and convenient popularization.
The present invention has been described in relation to the above embodiments, which are only examples of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that the invention be covered by the appended claims without departing from the spirit and scope of the invention.
Claims (5)
1. The Cr25Ni20Si2 heat-resistant steel bar is characterized by comprising the following elements in percentage by weight: c:0.18%, si:1.60 to 2.40 percent; mn:1.40 percent; p:0.030 percent; s:0.025 percent; cr:24.50 to 26.50 percent; ni:18.50 to 20.50 percent; zr:0.90 to 1.75 percent; the balance being Fe.
2. The Cr25Ni20Si2 heat-resistant steel bar according to claim 1, wherein the bar has the following elemental composition and content of each component in percentage by weight: c:0.18%, si:1.60 percent; mn:1.40 percent; p:0.009%; s:0.025 percent; cr:24.50 percent; ni:20.50 percent; zr:0.90 percent; the balance being Fe.
3. The Cr25Ni20Si2 heat-resistant steel bar according to claim 1, wherein the bar has the following elemental composition and the content of each component in percentage by weight: c:0.08%, si:2.00 percent; mn:0.90 percent; p:0.015 percent; s:0.015 percent; cr:25.50 percent; ni:19.50 percent; zr:1.25 percent; the balance being Fe.
4. The Cr25Ni20Si2 heat-resistant steel bar according to claim 1, wherein the bar has the following elemental composition and content of each component in percentage by weight: c:0.13%, si:2.40 percent; mn:0.40 percent; p:0.030%; s:0.005 percent; cr:26.50 percent; ni:18.50 percent; zr:1.75 percent; the balance being Fe.
5. A method for manufacturing a Cr25Ni20Si2 heat-resistant steel bar is characterized by comprising the following steps:
a. vacuum smelting:
(1) All metal materials are required to meet the quality standard and are used after being baked according to a system, and the addition amount of each element is strictly controlled by the ingredients;
(2) The vacuum degree in the melting period is less than 7Pa, small Ni, al and Zr materials are added during refining, and the small Ni, al and Zr materials are added when the film is formed after the refining is stopped, and the components are controlled;
(3) The vacuum degree in the refining period is less than or equal to 7Pa, at least two times of high-temperature instantaneous refining and one time of low-temperature long-time refining are adopted, the steel temperature is raised to 1420 ℃/1-2min, the steel temperature is lowered to 1320 ℃ (the steel film is just formed and the film is punched), and the refining time is more than or equal to 35min;
(4) The refining temperature is 1640 ℃, argon can not be filled in the whole process, the tapping temperature is 1740 ℃, 240Kg of round steel ingot is poured, after the late pouring, feeding is sufficient, and steel ingot is covered by sand and slowly cooled to be below 90 ℃ for marking and forging.
b. Forging: heating the bar steel at a heating temperature of 1240 ℃ for 40 minutes; hot forging the heated bar steel at a finish rolling temperature of 960 ℃ or higher;
c. cutting and annealing: cutting the forged blank by using a cutting machine after forging, and then entering an annealing process, wherein the annealing temperature is 1060 ℃;
d. hot rolling:
(1) Heating at 1180-1180 deg.c for 30 min;
(2) The initial rolling temperature is more than or equal to 1140 ℃, and the final rolling temperature is more than or equal to 940 ℃;
(3) Rolling specification phi 16mm, and sizing the straight bar L =4000mm.
e. Peeling:
and (3) peeling a straight bar with the diameter of 16.0mm to the diameter of 16.0+0.3mm, and fixing the length of L =4000-5mm per bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211479144.0A CN115772635A (en) | 2022-11-23 | 2022-11-23 | Cr25Ni20Si2 heat-resistant steel bar and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211479144.0A CN115772635A (en) | 2022-11-23 | 2022-11-23 | Cr25Ni20Si2 heat-resistant steel bar and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN115772635A true CN115772635A (en) | 2023-03-10 |
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| CN202211479144.0A Pending CN115772635A (en) | 2022-11-23 | 2022-11-23 | Cr25Ni20Si2 heat-resistant steel bar and manufacturing method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808138A (en) * | 2011-05-31 | 2012-12-05 | 中国核动力研究设计院 | New austenite stainless steel material of fuel cladding in supercritical water cooled reactor, and manufacturing process thereof |
| JP2015183261A (en) * | 2014-03-25 | 2015-10-22 | 新日鐵住金株式会社 | Austenitic heat resistant steel |
| CN106103779A (en) * | 2014-04-02 | 2016-11-09 | 日新制钢株式会社 | Sealing ring austenite stainless steel plate and sealing ring |
| CN108220783A (en) * | 2018-01-31 | 2018-06-29 | 江苏理工学院 | A kind of austenite heat-resistance stainless steel and its manufacturing method |
| US20190010565A1 (en) * | 2016-01-05 | 2019-01-10 | Nippon Steel & Sumitomo Metal Corporation | Austenitic Heat Resistant Alloy and Method for Producing the Same |
-
2022
- 2022-11-23 CN CN202211479144.0A patent/CN115772635A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808138A (en) * | 2011-05-31 | 2012-12-05 | 中国核动力研究设计院 | New austenite stainless steel material of fuel cladding in supercritical water cooled reactor, and manufacturing process thereof |
| JP2015183261A (en) * | 2014-03-25 | 2015-10-22 | 新日鐵住金株式会社 | Austenitic heat resistant steel |
| CN106103779A (en) * | 2014-04-02 | 2016-11-09 | 日新制钢株式会社 | Sealing ring austenite stainless steel plate and sealing ring |
| US20190010565A1 (en) * | 2016-01-05 | 2019-01-10 | Nippon Steel & Sumitomo Metal Corporation | Austenitic Heat Resistant Alloy and Method for Producing the Same |
| CN108220783A (en) * | 2018-01-31 | 2018-06-29 | 江苏理工学院 | A kind of austenite heat-resistance stainless steel and its manufacturing method |
Non-Patent Citations (1)
| Title |
|---|
| 重庆钢铁高等专科学校: "《模具钢手册》", 冶金工业出版社, pages: 275 - 276 * |
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Application publication date: 20230310 |