CN101403024A - Vacuum refining agent for heat-resistant steel - Google Patents
Vacuum refining agent for heat-resistant steel Download PDFInfo
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- CN101403024A CN101403024A CNA2008101550361A CN200810155036A CN101403024A CN 101403024 A CN101403024 A CN 101403024A CN A2008101550361 A CNA2008101550361 A CN A2008101550361A CN 200810155036 A CN200810155036 A CN 200810155036A CN 101403024 A CN101403024 A CN 101403024A
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- resistant steel
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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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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to an additive used in alloy steel materials, and provides a heat-resistant steel vacuum refining agent which is characterized in that the weight percentage of the chemical constituents are as follows: 47 to 58 percent of CaO, 11.2 to 17.1 percent of RE, 8 to 15 percent of Al2O3, 2 to 5 percent of Al, 1 to 2 percent of SiO2 and iron as the rest; in the RE, Y is 15 to 32 percent of the weight of the RE, and Ce is 5 to 11 percent of the weight of the RE and other rare earth elements as the rest. The invention can obviously improve the mechanical property and the high temperature oxidation resistance property of materials, fully improve the utilization performance of the materials and has very important significance to prolong the service life of parts and improve the operation stability of the whole machine of the device.
Description
Technical field
A kind of additive that the present invention relates to use in the alloy steel material, especially a kind of vacuum refining agent for heat-resistant steel.
Background technology
High temperature steel is meant under hot conditions to have the steel of oxidation-resistance and good high-temperature intensity and resistance toheat, comprises Oxidation Resistant Steel and Refractory Steel two classes.Be mainly used in the part of life-time service at high temperature, as make the component of at high temperature working in boiler, steam turbine, power machine, industrial furnace and the industrial sectors such as aviation, petrochemical complex, and make steel smelting equipment, hot-work and Equipment for Heating Processing etc.By the composition that improves smelting technology, adjusts steel can improve high temperature steel performance (document [1]: Sun Xiangming, Lv Songqiang, Zhang Zengguang. niobium, nitrogen, cerium be to the high temperature steel Effect on Performance, special steel .2002,23 (3): 16～18.); Document [2]: Zhang Hongwei, Wang Shebin, Niu Sitong, Xu Bingshe. the application of multi-functional refining agent in converter smelting. the journal .2007 of Institutes Of Technology Of Taiyuan, 38 (3): 272～274.).The resistance toheat and the high-temperature behavior that improve steel are significant for elongated component work-ing life and raising equipment complete machine operation stability.
Summary of the invention
The present invention proposes a kind of vacuum refining agent for heat-resistant steel.With this kind refining agent material is carried out refining treatment, utilize its with high temperature steel in the effect of different elements, component hot strength, antioxidant property etc. are obviously improved.
The present invention relates to a kind of vacuum refining agent for heat-resistant steel, it is characterized in that: its chemical ingredients by following weight percent constitutes: CaO is 47～58%, and RE is 11.2～17.1%, Al
2O
3Be 8～15%, Al is 2～5%, SiO
2Be 1～2%, surplus is an iron; In RE, Y is 15～32% of a RE weight, and Ce is 5～11% of a RE weight, and surplus is other rare earth element.The shape of described refining agent can be particulate state or bulk, size range 0.5～50mm.
It is 49～51% that above-mentioned vacuum refining agent for heat-resistant steel, composition can be preferably (weight percent): CaO, and RE is 16.2～17.1% (wherein, Y is 22～27% of a RE weight, and Ce is 5～7% of a RE weight, and surplus is other rare earth element), Al
2O
3Be 11～14%, Al is 2.5～3.5%, SiO
2Be 1～1.5%, surplus is an iron.
The present invention utilizes the rare earth resources of China, promotes steel product quality, can avoid being used alone raffinate confrontation material over-all properties and improve unconspicuous shortcoming; Mutual and metamorphism take place in the different-alloy element in rare earth and the steel, and the harm that alleviates P, S, H, O reaches cleaning molten steel, removes impurity, crystal grain thinning, strengthen matrix, improve carbide morphology and distribution, and tissue is optimized, and performance is obviously improved; Other material comprehensive actions with in the refining agent can obviously improve material mechanical performance, high-temperature oxidation resistance, improve the material use properties comprehensively.
Embodiment
Preparation example:
Raw material: CaO, Al
2O
3, ferroaluminium (iron content 20%), SiO
2, iron, RE (containing Y is 32%, and containing Ce is 11%, and surplus is other rare earth element).
Raw material is made the bulk that granularity is 50mm respectively, get CaO9.4kg then, Al
2O
3Powder 1.6kg, ferroaluminium 1.25kg, SiO
2Powder 0.4kg, iron 3.93kg, RE3.42kg can obtain vacuum refining agent for heat-resistant steel of the present invention through thorough mixing at last
Embodiment 1:
In vacuum induction furnace, carry out the smelting of high temperature steel according to common process, to molten steel with certain composition, use the above-mentioned vacuum refining agent for heat-resistant steel that makes and carry out refining treatment, refining agent chemical ingredients (weight percent) is: CaO is 47%, and RE is 17.1% (wherein, Y is 32% of a RE weight, Ce is 11% of a RE weight, and surplus is other rare earth element), Al
2O
3Be 8%, Al is 5%, SiO
2Be 2%, surplus is an iron, granularity 50mm.Alloy after the refining treatment is cast into coupon, makes sample then, carry out Performance Detection, the results are shown in Table 1.
Embodiment 2:
In vacuum induction furnace, carry out the smelting of high temperature steel according to common process, to with embodiment 1 in the molten steel of identical component, use vacuum refining agent for heat-resistant steel and carry out refining treatment, refining agent chemical ingredients (weight percent) is: CaO is 58%, and RE is 11.2% (wherein, Y is 15% of a RE weight, Ce is 5% of a RE weight, and surplus is other rare earth element), Al
2O
3Be 15%, Al is 2%, SiO
2Be 1%, surplus is an iron, granularity 40mm.Alloy after the refining treatment is cast into coupon, makes sample then, carry out Performance Detection, the results are shown in Table 1.
Embodiment 3:
In vacuum induction furnace, carry out the smelting of high temperature steel according to common process, to with embodiment 1 in the molten steel of identical component, use vacuum refining agent for heat-resistant steel and carry out refining treatment, refining agent chemical ingredients (weight percent) is: CaO is 49%, and RE is 17.1% (wherein, Y is 22% of a RE weight, Ce is 7% of a RE weight, and surplus is other rare earth element), Al
2O
3Be 11%, Al is 2.5%, SiO
2Be 1%, surplus is an iron, granularity 13mm.Alloy after the refining treatment is cast into coupon, makes sample then, carry out Performance Detection, the results are shown in Table 1.
Embodiment 4:
In vacuum induction furnace, carry out the smelting of high temperature steel according to common process, to with embodiment 1 in the molten steel of identical component, use vacuum refining agent for heat-resistant steel and carry out refining treatment, refining agent chemical ingredients (weight percent) is: CaO is 51%, and RE is 16.2% (wherein, Y is 27% of a RE weight, Ce is 5% of a RE weight, and surplus is other rare earth element), Al
2O
3Be 14%, Al is 3.5%, SiO
2Be 1.5%, surplus is an iron, granularity 0.5mm.Alloy after the refining treatment is cast into coupon, makes sample then, carry out Performance Detection, the results are shown in Table 1.
Comparative Examples:
To with embodiment 1 in the molten steel of identical component, carry out conventional refining treatment, then alloy is cast into coupon, make sample, carry out Performance Detection, the results are shown in Table 1.
By table 1 as can be seen, compare with the Comparative Examples that conventional refining treatment technology obtains, mechanical property and the antioxidant property of alloy embodiment 1, embodiment 2, embodiment 3 and embodiment 4 that process vacuum refining agent for heat-resistant steel of the present invention is handled obviously improve, and increase than embodiment 1,2 with the embodiment 3 of preferred component refining agent processing and the performance of embodiment 4.
Table 1, performance comparison table
Claims (3)
1, a kind of vacuum refining agent for heat-resistant steel is characterized in that: its chemical ingredients by following weight percent constitutes: CaO is 47～58%, and RE is 11.2～17.1%, Al
2O
3Be 8～15%, Al is 2～5%, SiO
2Be 1～2%, surplus is an iron; In RE, Y is 15～32% of a RE weight, and Ce is 5～11% of a RE weight, and surplus is other rare earth element.
2, vacuum refining agent for heat-resistant steel according to claim 1 is characterized in that: described refining agent be shaped as particulate state or bulk, size range 0.5～50mm.
3, vacuum refining agent for heat-resistant steel according to claim 1 is characterized in that: the weight percent of each composition is: CaO is 49～51%, and RE is 16.2～17.1%, Al
2O
3Be 11～14%, Al is 2.5～3.5%, SiO
2Be 1～1.5%, surplus is an iron; In RE, Y is 22～27% of a RE weight, and Ce is 5～7% of a RE weight, and surplus is other rare earth element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101550361A CN101403024A (en) | 2008-10-24 | 2008-10-24 | Vacuum refining agent for heat-resistant steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101550361A CN101403024A (en) | 2008-10-24 | 2008-10-24 | Vacuum refining agent for heat-resistant steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101403024A true CN101403024A (en) | 2009-04-08 |
Family
ID=40537183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101550361A Pending CN101403024A (en) | 2008-10-24 | 2008-10-24 | Vacuum refining agent for heat-resistant steel |
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| CN (1) | CN101403024A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102304634A (en) * | 2011-08-26 | 2012-01-04 | 河南科技大学 | Refining agent for smelting tin bronze alloy |
| CN105734197A (en) * | 2016-02-25 | 2016-07-06 | 济南济钢铁合金厂 | Novel environment-friendly synthetic slag forming material |
-
2008
- 2008-10-24 CN CNA2008101550361A patent/CN101403024A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102304634A (en) * | 2011-08-26 | 2012-01-04 | 河南科技大学 | Refining agent for smelting tin bronze alloy |
| CN102304634B (en) * | 2011-08-26 | 2012-07-04 | 河南科技大学 | Refining agent for smelting tin bronze alloy |
| CN105734197A (en) * | 2016-02-25 | 2016-07-06 | 济南济钢铁合金厂 | Novel environment-friendly synthetic slag forming material |
| CN105734197B (en) * | 2016-02-25 | 2017-09-15 | 山东济钢合金材料科技有限公司 | A kind of novel environment friendly synthesizes slag making materials |
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Open date: 20090408 |