CN101302575A - Alloyed aluminum-nickel-chromium-iron composite alloy for final deoxidizing in steel-making - Google Patents
Alloyed aluminum-nickel-chromium-iron composite alloy for final deoxidizing in steel-making Download PDFInfo
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- CN101302575A CN101302575A CNA2008100119458A CN200810011945A CN101302575A CN 101302575 A CN101302575 A CN 101302575A CN A2008100119458 A CNA2008100119458 A CN A2008100119458A CN 200810011945 A CN200810011945 A CN 200810011945A CN 101302575 A CN101302575 A CN 101302575A
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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
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Abstract
The invention relates to an alloy for steel in the metallurgical field, in particular to an aluminum nickel chrome copper iron composite alloy for final deoxidation and alloying in steelmaking. The aluminum nickel chrome copper iron composite alloy solves the problems that Cr, Ni and Cu are difficult to smash and process and troublesome in use, influence the steelmaking time, has large yield fluctuation, influence the smelting yield of steel grades, etc. The composite alloy simultaneously meets the smelting steel grade needs of a steel grade containing acid-soluble aluminum (Als) and Ni, Cr, Cu and other elements. The aluminum nickel chrome copper iron composite alloy comprises the following compositions in percentage by weight: less than or equal to 0.5 percent of C, less than or equal to 3 percent of Si, less than or equal to 0.05 percent of S, less than or equal to 0.05 percent of P, 3 to 70 percent of Al, 1 to 60 percent of Ni, 1 to 60 percent of Cr, 1 to 65 percent of Cu and the balance being Fe. The aluminum nickel chrome copper iron composite alloy has low melting point, large specific gravity, no pulverization, no impurity, convenient smelting operation, good and stable deoxidation effect, the Ni and Cu yield of 100 percent, the Cr yield of between 90 and 95 percent and high smelting yield of the steel grade.
Description
Technical field:
The present invention relates to field of metallurgy steel alloy, be specially a kind of aluminum-nickel-chromium copper ferrum composite alloy that is used to make steel final deoxygenation and alloying.
Background technology
The development that China's all trades and professions are being advanced by leaps and bounds, the steel product quality that needs is good, wide in variety, the market competition of steel industry is very fierce, the reductor of consequent steel-making usefulness also requires very strict, promptly want that fusing point is low, more enough than great, the deoxidation degree of depth, deoxidation products easily floats, purifies steel, and the satisfied again requirement to steel grades of deoxygenated alloy element, difficulty is very big.
Summary of the invention
The object of the present invention is to provide a kind of aluminum-nickel-chromium copper ferrum composite alloy that is used to make steel final deoxygenation and alloying, solve Cr, Ni, the difficult broken processing of Cu, use trouble, influence system steel time, the recovery rate fluctuation is big, influences steel grade and is smelt problems such as rate.This composite alloy of the present invention satisfies simultaneously and smelts the steel grade that steel grade requires sour molten aluminium (Als) and elements such as Ni, Cr, Cu.
Technical scheme of the present invention is:
Be used to make steel the aluminum-nickel-chromium copper ferrum composite alloy of final deoxygenation and alloying, by weight percentage, C≤0.5; Si≤3.0; S≤0.05; P≤0.05; Al 3～70; Ni 1～60; Cr 1～60; Cu 1～65; The Fe surplus.
The described aluminum-nickel-chromium copper ferrum composite alloy that is used to make steel final deoxygenation and alloying, by weight percentage, preferred composition range is C≤0.2; Si≤1.5; S≤0.03; P≤0.03; Al 30～40; Ni 20～30; Cr20～30; Cu 15～25; The Fe surplus.
Composite alloy of the present invention contains alloy element Al, Ni, Cr, Cu etc. simultaneously, aluminium and oxygen have strong avidity, aluminium has deoxidation, decides nitrogen in steel, the effect of crystal grain thinning, the timeliness that suppresses soft steel, improve steel toughness at low temperatures, add in the molten steel as alloy, improve the oxidation-resistance of steel, improve the wear resistance and the fatigue strength of steel.
The effect of Ni in the composite alloy of the present invention, Cr, Cu is respectively the main component in the steel, aluminium is to guarantee the requirement of Als content in the steel and have strong desoxydatoin, why Al, Ni, Cr, Cu are made alloy of the present invention together, be in order to realize that alloy is easy to fragmentation, reduce alloy melting point, velocity of diffusion is accelerated in steel, has increased strong deoxidizing capacity simultaneously again, improves the rate that is smelt of steel product quality and steel.
Advantage of the present invention and beneficial effect are:
1, the aluminum-nickel-chromium copper ferrum composite alloy developed of the present invention is to be one with each element by secondary remelting, processes the piece of 30～60mm, uses very conveniently, satisfies the requirement of steel mill.
2, aluminum-nickel-chromium copper ferrum composite alloy of the present invention by twice adding in stokehold, once adds when changing behind the stove tapping into, and the operation of saving time improves the system steel time at compression unproductive time, guarantees the safety in production accident free again, reduces ton steel cost, increases the performance of enterprises.
3, aluminum-nickel-chromium copper ferrum composite alloy of the present invention is used to make steel end-deoxidizer, deoxidation alloying effective and stable, and Ni, Cu recovery rate 100%, the recovery rate of Cr are up to 90～95%, and steel grade is smelt the rate height.
4, aluminum-nickel-chromium copper ferrum composite alloy fusing point of the present invention is low, than great, and diffusion easily, molten steel is pure behind the deoxidation alloying, and is free from environmental pollution.Deoxidation alloying after product in the steel is easily got rid of, steel is good, long service life, and social benefit is good.
5, aluminum-nickel-chromium copper ferrum composite alloy surface-brightening of the present invention easily transports and stores, not efflorescence, inclusion-free.
6, aluminum-nickel-chromium copper ferrum composite alloy of the present invention can be smelted the steel grade that requires Als in the steel and low alloy steel, steel alloy and the particular requirement of elements such as Cr, Ni, Cu are arranged, as steel such as railway, space flight, oil, geology, bridge.
7, aluminum-nickel-chromium copper ferrum composite alloy smelting operation of the present invention is convenient, refined these steel grades in the past, Ni, Cu plate will add when adding cold burden together, Cr iron will could add when liquid steel temperature reaches tapping temperature, cause and turn over greatly in the stove that back cooling is fast, carbon drop is fast, influence does not become former steel grade with equipment breakdown owing to the operation reason, and that influence loss is bigger.Behind reductor of the present invention, add in the jar during tapping, the accident that can prevent takes place and does not become former steel grade, and whole production scheduling and guarantor's steel grade completion rate all are beneficial to, and brings considerable economic to enterprise.
Embodiment
One, the technology index (wt%) of aluminium chromium ambrose alloy ferrum composite alloy sees Table 1.
Table 1
| C | Si | P | S | Al | Ni | Cr | Cu | Fe | Proportion (g/cm 3) | Fusing point (℃) | Granularity (mm) |
| ≤0.5 | ≤3.0 | ≤0.05 | ≤0.05 | 3～70 | 1～60 | 1～60 | 1～65 | Surplus | 3.3～4.9 | 1180～1310 | 30～60 |
Two, manufacturing processed
The present invention adopts main frequency furnace remelting process technology to smelt to form, select materials and implement the fine fodder policy, Al in the starting material adds with metallic aluminium (A00) form, Ni adds with electrolytic nickel (Ni99.99 or Ni99.90) form, and Cr adds with chromium metal (JCr99-A) form, and Fe adds with steel scrap scrap stock form, Cu adds with the electrolytic copper form, in proportion meticulously after the preparation, be placed on and smelt syntheticly in the main frequency furnace, will check the adjustment composition in the smelting process.Tap a blast furnace after qualified, slag hitting, ingot casting, press again stove respectively sample examination analyze composition, warehousing after passing, pack, be transported to steel mill and use and store.
Three, use
Aluminum-nickel-chromium copper ferrum composite alloy of the present invention can be used in the enterprising enforcement of the top-blown oxygen converter of 40t, 100t, 170t, the steel grade of smelting requires sour molten aluminium (Als, general requirement is 0.006～0.021%wt) and low alloy steel, steel alloy, the special use steel of elements such as Cr, Ni, Cu is arranged, can receive satisfied effect with this kind composite alloy.As: 0Cr18Ni9Cu3, HQ70A, HQ70B etc.
Embodiment 1
By weight percentage, aluminum-nickel-chromium copper ferrum composite alloy composition is as follows: C 0.15; Si 0.8; P 0.023; S0.020; Al 35; Ni 25; Cr20; Cu 15; The Fe surplus.
Aluminum-nickel-chromium copper ferrum composite alloy of the present invention is used for 0Cr18Ni9Cu3 production, and carries out final deoxygenation; Molten steel is tapped and was begun to add in 1/5 o'clock in big jar behind the stove, add all various reductors, comprise that also aluminum-nickel-chromium copper ferrum composite alloy of the present invention adds 1～3kg/ ton molten steel, by the time molten steel goes out to big jar to stop to add in interior 4/5 o'clock, take the pushing off the slag tapping, and tap hole is big, in time change, reduce slag and flow in the molten steel jar, lay a solid foundation to furnace rear refining, result of use is good.Composition and steel performance see Table 2 behind its stove.
Table 2
| C wt％ | Si wt％ | Mn wt％ | P wt％ | S wt％ | Ni wt％ | Cr wt％ | Cu wt％ | Yield strength MPa | Tensile strength MPa | Elongation % | HB | HRB | HV |
| 0.07 | 0.87 | 1.78 | 0.028 | 0.018 | 9.62 | 18.2 | 3.71 | 386 | 628 | 56 | 178 | 78 | 189 |
Embodiment 2
Difference from Example 1 is: by weight percentage, aluminum-nickel-chromium copper ferrum composite alloy composition is as follows:
C 0.24; Si 0.5; P 0.028; S 0.034; Al 10; Ni 20; Cr40; Cu 18; The Fe surplus.
Embodiment 3
Difference from Example 1 is: by weight percentage, aluminum-nickel-chromium copper ferrum composite alloy composition is as follows:
C 0.3; Si 1.0; P 0.017; S 0.036; Al 12; Ni 20; Cr 30; Cu 28; The Fe surplus.
Embodiment 4
Difference from Example 1 is: by weight percentage, aluminum-nickel-chromium copper ferrum composite alloy composition is as follows:
C 0.2; Si 0.5; P 0.025; S 0.035; Al 3; Ni 40; Cr 12; Cu 16; The Fe surplus.
Embodiment 5
Difference from Example 1 is: by weight percentage, aluminum-nickel-chromium copper ferrum composite alloy composition is as follows:
C 0.15; Si 0.2; P 0.022; S 0.025; Al 50; Ni 4; Cr 8; Cu 15; The Fe surplus.
Embodiment 6
Difference from Example 1 is: by weight percentage, aluminum-nickel-chromium copper ferrum composite alloy composition is as follows:
C 0.13; Si 0.8; P 0.016; S 0.024; Al 60; Ni 8; Cr2; Cu 20; The Fe surplus.
Embodiment 7
Difference from Example 1 is: by weight percentage, aluminum-nickel-chromium copper ferrum composite alloy composition is as follows:
C 0.10; Si 0.6; P 0.026; S 0.016; Al 20; Ni 50; Cr3; Cu 6; The Fe surplus.
Embodiment 8
Difference from Example 1 is: by weight percentage, aluminum-nickel-chromium copper ferrum composite alloy composition is as follows:
C 0.25; Si 0.8; P 0.014; S 0.026; Al 15; Ni 18; Cr 6; Cu 42; The Fe surplus.
Embodiment 9
Difference from Example 1 is: by weight percentage, aluminum-nickel-chromium copper ferrum composite alloy composition is as follows:
C 0.20; Si 1.0; P 0.02; S 0.02; Al 70; Ni 10; Cr 10; Cu 5; The Fe surplus.
Embodiment 10
Difference from Example 1 is: by weight percentage, aluminum-nickel-chromium copper ferrum composite alloy composition is as follows:
C 0.10; Si 1.5; P 0.019; S 0.021; Al 20; Ni 30; Cr 30; Cu 10; The Fe surplus.
Embodiment 11
Difference from Example 1 is: by weight percentage, aluminum-nickel-chromium copper ferrum composite alloy composition is as follows:
C 0.15; Si 1.3; P 0.03; S 0.025; Al 10; Ni 30; Cr 15; Cu 40; The Fe surplus.
When the present invention used at final deoxygenation, add-on was 1～3kg/ ton molten steel, and compared with prior art, cost reduces greatly.End-deoxidizer of the present invention uses easy to operate, deoxidation effect is good, yield of alloy height, steel grade are smelt the rate height, and steel quality is good, and the dissolved oxygen in the reduction steel, reduce nonmetallic inclusionsin steel, crystal grain thinning, the inner quality and the work-ing life of improving steel, satisfy user's demand, play the effect of upgrading consumption reduction again.
Claims (2)
1, a kind of aluminum-nickel-chromium copper ferrum composite alloy that is used to make steel final deoxygenation and alloying is characterized in that: by weight percentage, and C≤0.5; Si≤3.0; S≤0.05; P≤0.05; Al 3～70; Ni 1～60; Cr 1～60; Cu 1～65; The Fe surplus.
2, according to the described aluminum-nickel-chromium copper ferrum composite alloy that is used to make steel final deoxygenation and alloying of claim 1, it is characterized in that: by weight percentage, preferred composition range is C≤0.2; Si≤1.5; S≤0.03; P≤0.03; Al 30～40; Ni 20～30; Cr 20～30; Cu 15～25; The Fe surplus.
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| CNA2008100119458A CN101302575A (en) | 2008-06-20 | 2008-06-20 | Alloyed aluminum-nickel-chromium-iron composite alloy for final deoxidizing in steel-making |
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| CNA2008100119458A CN101302575A (en) | 2008-06-20 | 2008-06-20 | Alloyed aluminum-nickel-chromium-iron composite alloy for final deoxidizing in steel-making |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103421979A (en) * | 2013-08-27 | 2013-12-04 | 苏州长盛机电有限公司 | Chromium copper alloy |
| CN104060905A (en) * | 2014-05-26 | 2014-09-24 | 安徽盛达前亮铝业有限公司 | Sliding door suspender |
| CN107365933A (en) * | 2017-06-27 | 2017-11-21 | 太仓市雅兴精密冲压件厂 | A kind of shock proof die casting of high abrasion |
-
2008
- 2008-06-20 CN CNA2008100119458A patent/CN101302575A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103421979A (en) * | 2013-08-27 | 2013-12-04 | 苏州长盛机电有限公司 | Chromium copper alloy |
| CN104060905A (en) * | 2014-05-26 | 2014-09-24 | 安徽盛达前亮铝业有限公司 | Sliding door suspender |
| CN104060905B (en) * | 2014-05-26 | 2016-11-23 | 安徽盛达前亮铝业有限公司 | Sliding door suspends in midair |
| CN107365933A (en) * | 2017-06-27 | 2017-11-21 | 太仓市雅兴精密冲压件厂 | A kind of shock proof die casting of high abrasion |
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Open date: 20081112 |