CN112522604A - Steel for petroleum valve body and preparation method thereof - Google Patents
Steel for petroleum valve body and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- 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
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- 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
- C21D6/002—Heat treatment of ferrous alloys containing Cr
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- 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
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- 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
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- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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- 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
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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Abstract
The invention is suitable for the technical field of manganese steel production research and development, and provides steel for a petroleum valve body and a preparation method thereof, wherein the steel comprises manganese steel, and the manganese steel comprises the following chemical parameter ratios: al: 0.25% -0.75%, C: 0.25%, Si: 0.25%, Mn: 1.66%, Cr: 0.25%, Nb: 0.016%, V: 0.107%, S: less than or equal to 0.030 percent, P: less than or equal to 0.025 percent, O: less than or equal to 0.0070%, N: 0.0284 percent and the balance of Fe, the invention can quickly repair the wear-resistant layer of the manganese steel in the low-oxygen environment of petroleum operation, improve the wear-resistant property of the manganese steel and widen the application field of the manganese steel.
Description
Technical Field
The invention belongs to the field of production research and development of manganese steel, and particularly relates to steel for a petroleum valve body and a preparation method thereof.
Background
The steel is a steel ingot, a steel billet or a material with certain shape, size and performance, which is manufactured by the steel through pressure processing, most of the steel processing is through pressure processing, the processed steel (the billet, the ingot and the like) generates plastic deformation, and the steel processing can be divided into cold processing and hot processing according to the difference of the processing temperature of the steel.
In the prior art, the petroleum valve body is mostly made of high manganese steel which has strong wear resistance and can be hardened on the surface to form a protective film, however, the hardened layer is formed under harsh conditions, and the superiority of the high manganese steel is difficult to show under certain conditions.
Disclosure of Invention
The invention provides steel for a petroleum valve body and a preparation method thereof, and aims to solve the problems that in the prior art, the petroleum valve body is mostly made of high manganese steel which has strong wear resistance and can be hardened to form a protective film on the surface of the high manganese steel, but the hardened layer is formed under harsh conditions and is difficult to show the superiority of the high manganese steel under certain conditions.
The invention is realized in such a way that the steel for the petroleum valve body comprises manganese steel, wherein the manganese steel comprises the following chemical parameter ratios: al: 0.25% -0.75%, C: 0.25%, Si: 0.25%, Mn: 1.66%, Cr: 0.25%, Nb: 0.016%, V: 0.107%, S: less than or equal to 0.030 percent, P: less than or equal to 0.025 percent, O: less than or equal to 0.0070%, N: 0.0284%, and the balance Fe.
Preferably, the manganese steel has the following chemical parameter mixture ratio: al: 0.25%, C: 0.25%, Si: 0.25%, Mn: 1.66%, Cr: 0.25%, Nb: 0.016%, V: 0.107%, S: less than or equal to 0.030 percent, P: less than or equal to 0.025 percent, O: less than or equal to 0.0070%, N: 0.0284%, and the balance Fe.
Preferably, the manganese steel has the following chemical parameter mixture ratio: al: 0.50%, C: 0.15%, Si: 0.25%, Mn: 1.66%, Cr: 0.25%, Nb: 0.016%, V: 0.107%, S: less than or equal to 0.030 percent, P: less than or equal to 0.025 percent, O: less than or equal to 0.0070%, N: 0.0284%, and the balance Fe.
Preferably, the manganese steel has the following chemical parameter mixture ratio: al: 0.75%, C: 0.10%, Si: 0.25%, Mn: 1.66%, Cr: 0.25%, Nb: 0.016%, V: 0.107%, S: less than or equal to 0.030 percent, P: less than or equal to 0.025 percent, O: less than or equal to 0.0070%, N: 0.0284%, and the balance Fe.
A preparation method of steel for a petroleum valve body comprises the following steps:
step S100: fusing the raw materials at high temperature and then feeding the raw materials;
step S200: performing LF refining on the mixed molten steel;
step S300: vacuum degassing is carried out on the refined molten steel;
step S400: forging the molding material at high temperature;
step S500: quenching and tempering the forged steel;
step S600: and (5) inspecting the performance of the steel.
Preferably, in step S100, in order to prevent premature oxidation of Al and thus a reduction in rigidity of the steel, Al is added after mixing of other elements at a high temperature.
Preferably, in the step S300, the vacuum degassing time is controlled to be 20min to 25min, and the temperature is 1000 ℃.
Preferably, the formed steel material is forged at high temperature at least three times in the step S400.
Preferably, in the step S500, the steel material is quenched at a high temperature of 900 ℃ and tempered at a high temperature of 700 ℃, and the quenching material is grease.
Preferably, in step S600, the steel material is inspected, including the detection of wear resistance and rigidity.
Compared with the prior art, the invention has the beneficial effects that: according to the steel for the petroleum valve body and the preparation method thereof, the proportion of the content of each element in the traditional production process is adjusted, meanwhile, a certain proportion of Al and partial oxide of Al are added into the material, the Al and partial oxide of Al form polymeric aluminum under the high-temperature condition, and after the forming, the forging is carried out at the high-temperature condition for three times, so that the surface of the steel can be rapidly oxidized in the working environment with low oxygen content after the steel is formed, and the wear resistance of the steel in the grease environment is improved.
Drawings
FIG. 1 is a flow chart of a method of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The steel for the petroleum valve body comprises manganese steel, and the chemical parameter ratio of the manganese steel is as follows: al: 0.25%, C: 0.25%, Si: 0.25%, Mn: 1.66%, Cr: 0.25%, Nb: 0.016%, V: 0.107%, S: less than or equal to 0.030 percent, P: less than or equal to 0.025 percent, O: less than or equal to 0.0070%, N: 0.0284%, and the balance Fe.
In the embodiment, firstly, elements except Al are added into a smelting furnace according to a proportion for high-temperature melting, when molten steel with the carbon content of 0.25 percent is heated uniformly, Al and partial oxides of Al with the mass percent of 0.25 percent are added into the molten steel, the mass parameter of the Al is far lower than that of other elements, so that the Al is positioned at the upper position in the mixed molten steel, the molten steel is further subjected to LF refining, inert gases such as argon and the like are adopted to blow up in the whole refining process to prevent early oxidation, then the refined molten steel is subjected to vacuum degassing, the molten steel is in a vacuum environment for 25min, but the internal oxygen content is lower than 0.002 percent and the hydrogen content is lower than 0.0016 percent, so that internal inclusions in the molten steel are sufficiently removed, then the molten steel is subjected to crystallization molding to rapidly crystallize to form steel to form austenite, and because the Al is concentrated on the upper layer of a crystal, the Al is easier to form an oxide layer than other elements in, after the steel is formed, on the premise that the strength is not reduced, the steel still keeps the surface of the steel capable of being rapidly oxidized in a working environment with low oxygen content, the wear resistance of the steel in a grease environment is improved, further, high-temperature forging is carried out on the formed steel, P element still exists in an oxide layer on the surface of the steel, through three-time high-temperature forging, the wear-resistant layer elements on the surface of the steel are more purified, the wear resistance of the wear-resistant layer is further more perfect, finally, the forged steel is quenched, the steel is quenched at the high temperature of 900 ℃, and the high-temperature tempering at 700 ℃ is matched, so that the tensile strength of the steel is improved, the grease is used as a quenching agent, and the wear resistance and the hardness of the steel are improved.
Example 2
The steel for the petroleum valve body comprises manganese steel, and the chemical parameter ratio of the manganese steel is as follows: al: 0.50%, C: 0.15%, Si: 0.25%, Mn: 1.66%, Cr: 0.25%, Nb: 0.016%, V: 0.107%, S: less than or equal to 0.030 percent, P: less than or equal to 0.025 percent, O: less than or equal to 0.0070%, N: 0.0284%, and the balance Fe.
In the embodiment, firstly, elements except Al are added into a smelting furnace according to a proportion for high-temperature melting, when molten steel with the carbon content of 0.15 percent is heated uniformly, Al and partial oxides of Al with the mass percent of 0.50 percent are added into the molten steel, the mass parameter of the Al is far lower than that of other elements, so that the Al is positioned at the upper position in the mixed molten steel, the molten steel is further subjected to LF refining, inert gases such as argon and the like are adopted to blow up in the whole refining process to prevent early oxidation, then the refined molten steel is subjected to vacuum degassing, the molten steel is in a vacuum environment for 20min, but the internal oxygen content is lower than 0.002 percent and the hydrogen content is lower than 0.0016 percent, so that internal inclusions in the molten steel are sufficiently removed, then the molten steel is subjected to crystallization molding to rapidly crystallize to form steel to form austenite, and because the Al is concentrated on the upper layer of a crystal, the Al is easier to form an oxide layer than other elements in, after the steel is formed, on the premise that the strength is not reduced, the steel still keeps the surface of the steel capable of being rapidly oxidized in a working environment with low oxygen content, the wear resistance of the steel in a grease environment is improved, further, high-temperature forging is carried out on the formed steel, P element still exists in an oxide layer on the surface of the steel, through three-time high-temperature forging, the wear-resistant layer elements on the surface of the steel are more purified, the wear resistance of the wear-resistant layer is further more perfect, finally, the forged steel is quenched, the steel is quenched at the high temperature of 900 ℃, and the high-temperature tempering at 700 ℃ is matched, so that the tensile strength of the steel is improved, the grease is used as a quenching agent, and the wear resistance and the hardness of the steel are improved.
Example 3
The steel for the petroleum valve body comprises manganese steel, and the chemical parameter ratio of the manganese steel is as follows: al: 0.75%, C: 0.10%, Si: 0.25%, Mn: 1.66%, Cr: 0.25%, Nb: 0.016%, V: 0.107%, S: less than or equal to 0.030 percent, P: less than or equal to 0.025 percent, O: less than or equal to 0.0070%, N: 0.0284%, and the balance Fe.
In the embodiment, firstly, elements except Al are added into a smelting furnace according to a proportion for high-temperature melting, when molten steel with the carbon content of 0.10 percent is heated uniformly, Al and partial oxides of Al with the mass percent of 0.75 percent are added into the molten steel, the mass parameter of the Al is far lower than that of other elements, so that the Al is positioned at the upper position in the mixed molten steel, the molten steel is further subjected to LF refining, inert gases such as argon and the like are adopted to blow up in the whole refining process to prevent early oxidation, then the refined molten steel is subjected to vacuum degassing, the molten steel is subjected to 12min in a vacuum environment, but the internal oxygen content is lower than 0.002 percent and the hydrogen content is lower than 0.0016 percent, so that internal inclusions in the molten steel are sufficiently removed, then the molten steel is subjected to crystallization molding to rapidly crystallize to form steel to form austenite, and the Al is easier to form an oxide layer than other elements in the environment with low oxygen content because the Al is concentrated on, after the steel is formed, on the premise that the strength is not reduced, the steel still keeps the surface of the steel capable of being rapidly oxidized in a working environment with low oxygen content, the wear resistance of the steel in a grease environment is improved, further, high-temperature forging is carried out on the formed steel, P element still exists in an oxide layer on the surface of the steel, through three-time high-temperature forging, the wear-resistant layer elements on the surface of the steel are more purified, the wear resistance of the wear-resistant layer is further more perfect, finally, the forged steel is quenched, the steel is quenched at the high temperature of 900 ℃, and the high-temperature tempering at 700 ℃ is matched, so that the tensile strength of the steel is improved, the grease is used as a quenching agent, and the wear resistance and the hardness of the steel are improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The steel for the petroleum valve body comprises manganese steel and is characterized in that: the manganese steel comprises the following chemical parameter ratios: al: 0.25% -0.75%, C: 0.25%, Si: 0.25%, Mn: 1.66%, Cr: 0.25%, Nb: 0.016%, V: 0.107%, S: less than or equal to 0.030 percent, P: less than or equal to 0.025 percent, O: less than or equal to 0.0070%, N: 0.0284%, and the balance Fe.
2. The steel for petroleum valve bodies according to claim 1, characterized in that: the manganese steel comprises the following chemical parameter ratios: al: 0.25%, C: 0.25%, Si: 0.25%, Mn: 1.66%, Cr: 0.25%, Nb: 0.016%, V: 0.107%, S: less than or equal to 0.030 percent, P: less than or equal to 0.025 percent, O: less than or equal to 0.0070%, N: 0.0284%, and the balance Fe.
3. The steel for petroleum valve bodies according to claim 1, characterized in that: the manganese steel comprises the following chemical parameter ratios: al: 0.50%, C: 0.15%, Si: 0.25%, Mn: 1.66%, Cr: 0.25%, Nb: 0.016%, V: 0.107%, S: less than or equal to 0.030 percent, P: less than or equal to 0.025 percent, O: less than or equal to 0.0070%, N: 0.0284%, and the balance Fe.
4. The steel for petroleum valve bodies according to claim 1, characterized in that: the manganese steel comprises the following chemical parameter ratios: al: 0.75%, C: 0.10%, Si: 0.25%, Mn: 1.66%, Cr: 0.25%, Nb: 0.016%, V: 0.107%, S: less than or equal to 0.030 percent, P: less than or equal to 0.025 percent, O: less than or equal to 0.0070%, N: 0.0284%, and the balance Fe.
5. A preparation method of steel for a petroleum valve body is characterized by comprising the following steps: the method comprises the following steps:
step S100: fusing the raw materials at high temperature;
step S200: performing LF refining on the mixed molten steel;
step S300: vacuum degassing is carried out on the refined molten steel;
step S400: forging the molding material at high temperature;
step S500: quenching and tempering the forged steel;
step S600: and (5) inspecting the performance of the steel.
6. The method for preparing steel for a petroleum valve body according to claim 5, wherein the method comprises the following steps: in step S100, in order to prevent premature oxidation of Al and thus lower rigidity of the steel, Al is added after mixing other elements at a high temperature.
7. The method for preparing steel for a petroleum valve body according to claim 5, wherein the method comprises the following steps: in the step S300, the vacuum degassing time is controlled to be 20 min-25 min, and the temperature is 1000 ℃.
8. The method for preparing steel for a petroleum valve body according to claim 5, wherein the method comprises the following steps: in the step S400, the formed steel material is forged at high temperature at least three times.
9. The method for preparing steel for a petroleum valve body according to claim 5, wherein the method comprises the following steps: in the step S500, the steel is quenched at a high temperature of 900 ℃ and tempered at a high temperature of 700 ℃, and the quenching material is grease.
10. The method for preparing steel for a petroleum valve body according to claim 5, wherein the method comprises the following steps: in step S600, the steel material is inspected, including the detection of wear resistance and rigidity.
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| CN202011277127.XA CN112522604A (en) | 2020-11-16 | 2020-11-16 | Steel for petroleum valve body and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104894487A (en) * | 2015-06-25 | 2015-09-09 | 江苏沙钢集团淮钢特钢股份有限公司 | High-strength high-toughness steel for valves of oil drilling platforms and technology for manufacturing high-strength high-toughness steel |
| WO2018052089A1 (en) * | 2016-09-15 | 2018-03-22 | 新日鐵住金株式会社 | Wear resistant steel |
| CN109207862A (en) * | 2018-11-21 | 2019-01-15 | 马鞍山市恒久特材有限公司 | A kind of wear-resisting type special type steel deep-sea oil valve body and its manufacturing method |
| CN110106308A (en) * | 2019-04-30 | 2019-08-09 | 无锡市法兰锻造有限公司 | A kind of manufacturing method of high-performance 12Cr2Mo1 forging |
| CN110546290A (en) * | 2018-03-29 | 2019-12-06 | 日本制铁株式会社 | Austenitic wear-resistant steel plate |
-
2020
- 2020-11-16 CN CN202011277127.XA patent/CN112522604A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104894487A (en) * | 2015-06-25 | 2015-09-09 | 江苏沙钢集团淮钢特钢股份有限公司 | High-strength high-toughness steel for valves of oil drilling platforms and technology for manufacturing high-strength high-toughness steel |
| WO2018052089A1 (en) * | 2016-09-15 | 2018-03-22 | 新日鐵住金株式会社 | Wear resistant steel |
| CN110546290A (en) * | 2018-03-29 | 2019-12-06 | 日本制铁株式会社 | Austenitic wear-resistant steel plate |
| CN109207862A (en) * | 2018-11-21 | 2019-01-15 | 马鞍山市恒久特材有限公司 | A kind of wear-resisting type special type steel deep-sea oil valve body and its manufacturing method |
| CN110106308A (en) * | 2019-04-30 | 2019-08-09 | 无锡市法兰锻造有限公司 | A kind of manufacturing method of high-performance 12Cr2Mo1 forging |
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