CN108866422A - A kind of high-plasticity screw-thread steel and preparation method thereof - Google Patents
A kind of high-plasticity screw-thread steel 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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master 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
- C22C33/006—Making ferrous alloys compositions used for making 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
- C22C35/00—Master alloys for iron or steel
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
Abstract
The present invention relates to field of iron and steel smelting, a kind of high-plasticity screw-thread steel and preparation method thereof is provided, for improving the plasticity and toughness of screw-thread steel.A kind of high-plasticity screw-thread steel provided by the invention and preparation method thereof, it successively include electric furnace smelting, external refining, continuous casting, hot rolling, it is cooling, cutting and tack process, in the electric furnace smelting process, by the pig iron, aluminium ingot and vanadium ingot congruent melting stirring, ferrosilicon and manganeisen are added during electric furnace smelting to external refining, ferrophosphorus is added in external refining process, 900 ~ 1000 mass parts of the pig iron, 0.2 ~ 60 mass parts of aluminium ingot, 0.5 ~ 3.5 mass parts of vanadium ingot, 5 ~ 9 mass parts of ferrosilicon, 30 ~ 50 mass parts of manganeisen, 10 ~ 25 mass parts of ferrophosphorus.C, Mn, Ni, P, Cu are compounded into manufactured alloy with Fe, can effectively improve the intensity of screw-thread steel, while will not influence the intensity of screw-thread steel.
Description
Technical field
The present invention relates to field of iron and steel smelting, and in particular to a kind of high-plasticity screw-thread steel and preparation method thereof.
Background technique
Combined age-hardening martensite steel with very high intensity and fracture toughness is known.In known steel
In be included in those described in U.S. Patent number 4076525 and U.S. Patent number 5087415.The former is referred to as AF1410 conjunction
Gold, the latter is with registered trademark AERMET sale.The combination of very high intensity and toughness that these alloys provide is their group
At as a result, wherein include significant quantity nickel, cobalt, molybdenum, these elements are usually the alloying element of most expensive.Therefore, it is compared
He does not include the alloy of these elements, these steel are with much higher sale at premium.
When screw-thread steel is by external impact, the toughness size and impact resistance of material are very crucial, if toughness compared with
Difference, impact resistance is smaller, then can generate damaging influence to the texture of material.At this point, if material has very high punching
Hit toughness, then it can be to avoid the generation of above-mentioned harm.
CN103502498A discloses a kind of high-intensitive, high-ductility steel.The alloy has following weight percent composition：
Elements C 0.30-0.47, Mn0.8-1.3, Si1.5-2.5, Cr1.5-2.5, Ni3.0-5.0, Mo+1/2W0.7-0.9, Cu0.70-
0.90, Co is most 0.01, V+ (5/9) × Nb0.10-0.25, Ti is most 0.005, most 0.015, the Fe surpluses of Al.It is wrapped in surplus
It includes as common impurity in similar purpose and the commerical grade steel of performance manufacture, including no more than about 0.01% phosphorus, no more than about
0.001% sulphur.A kind of quenched product is also disclosed, with very high intensity and fracture toughness.The invention can be effective
Raising steel toughness, but be formulated complex, while the toughness of steel is not easy to hold with the equalization point of intensity.
Summary of the invention
Present invention solves the technical problem that providing a kind of high-plasticity screw-thread steel and its system to improve the plasticity and toughness of screw-thread steel
Preparation Method.
In order to solve the above technical problem, the present invention provides technical solution be：
A kind of high-plasticity screw-thread steel preparation method successively includes electric furnace smelting, external refining, continuous casting, hot rolling, cooling, cutting
With tack process, in the electric furnace smelting process, the pig iron, aluminium ingot and vanadium ingot congruent melting are stirred, electric furnace smelting to external refining
During ferrosilicon and manganeisen is added, be added ferrophosphorus in external refining process, 900 ~ 1000 mass parts of the pig iron,
0.2 ~ 60 mass parts of aluminium ingot, 0.5 ~ 3.5 mass parts of vanadium ingot, 5 ~ 9 mass parts of ferrosilicon, the manganese iron
30 ~ 50 mass parts of alloy, 10 ~ 25 mass parts of ferrophosphorus.
C is intensified element most basic in steel, and C content is every to increase by 0.01%, the tensile strength increase about 10MPa of steel；Mn
It is mainly used for increasing steel strength, while reduces S in ore and damaging；Al, V can effectively improve the plasticity or tough of steel
Property, the anticorrosion effect of steel is improved with pig iron smelting by carbon dust, ferrophosphorus, ferrosilicon, manganeisen, nickel ingot, copper ingot.
C, Mn, Al, P, V are compounded into manufactured alloy with Fe, can effectively improve the intensity of screw-thread steel, while can't
Influence the intensity of screw-thread steel.
Preferably, 950 ~ 1000 mass parts of the pig iron, 55 ~ 60 mass parts of aluminium ingot, the vanadium ingot 2.5 ~
3.5 mass parts, 6 ~ 9 mass parts of ferrosilicon, 35 ~ 50 mass parts of manganeisen, 15 ~ 25 mass of ferrophosphorus
Part.
Preferably, 950 mass parts of the pig iron, 55 mass parts of aluminium ingot, 2.5 mass parts of vanadium ingot, institute
6 mass parts of ferrosilicon stated, 35 mass parts of manganeisen, 15 mass parts of ferrophosphorus.
Preferably, the aluminium ingot is modified aluminium ingot.Modified aluminium can significantly improve the toughness of steel.
Preferably, the modification aluminium ingot is made by the following method：
90 ~ 120 mass parts of aluminium ingot are taken, 5 ~ 10 mass parts of modifying agent are added after vacuum fusion and stir cast molding after 1 ~ 3h；
The modifying agent includes 2 ~ 4 mass parts of carbon nanotube, 15 ~ 20 mass parts of pure aluminium powder, 1 ~ 3 mass of nano-cerium oxide
Part, 2 ~ 6 mass parts of nano cupric oxide, 2 ~ 8 mass parts of chrome green；By the same nano-cerium oxide of carbon nanotube, nano cupric oxide
With pure aluminium powder, ball milling, resulting mixed-powder are added in ethyl alcohol and are uniformly mixed under vacuum with after chrome green mixing, and 50
DEG C 2 ~ 4h of ultrasound, then it is cooling, filter, clean obtained solid substance with deionized water, obtained solid substance is after being dried in vacuo
Powder, that is, modifying agent.
Composite effect of the carbon nanotube with aluminium powder can be enhanced with metal oxide mixing in carbon nanotube, later with aluminium powder ball
It is pre-dispersed into aluminium powder that mill can make carbon nanotube, and then be added in ethyl alcohol and be uniformly mixed, and ultrasound fills carbon nanotube
That divides is distributed in aluminium powder, compound with aluminium powder, obtains modifying agent.
Preferably, Modification on Al is made by the following method：
100 ~ 120 mass parts of aluminium ingot are taken, 8 ~ 10 mass parts of modifying agent are added after vacuum fusion and stir cast molding after 2 ~ 3h；
The modifying agent includes 3 ~ 4 mass parts of carbon nanotube, 18 ~ 20 mass parts of pure aluminium powder, 2 ~ 3 mass of nano-cerium oxide
Part, 4 ~ 6 mass parts of nano cupric oxide, 6 ~ 8 mass parts of chrome green；By the same nano-cerium oxide of carbon nanotube, nano cupric oxide
With pure aluminium powder, ball milling, resulting mixed-powder are added in ethyl alcohol and are uniformly mixed under vacuum with after chrome green mixing, and 50
DEG C 3 ~ 4h of ultrasound, then it is cooling, filter, clean obtained solid substance with deionized water, obtained solid substance is after being dried in vacuo
Powder, that is, modifying agent.
Preferably, Modification on Al is made by the following method：
100 mass parts of aluminium ingot are taken, cast molding after 8 mass parts of modifying agent stirring 2h is added after vacuum fusion；
The modifying agent includes 3 mass parts of carbon nanotube, 18 mass parts of pure aluminium powder, 2 mass parts of nano-cerium oxide, nano oxygen
Change 4 mass parts of copper, 6 mass parts of chrome green；The same nano-cerium oxide of carbon nanotube, nano cupric oxide and chrome green are mixed
With pure aluminium powder, ball milling, resulting mixed-powder are added in ethyl alcohol and are uniformly mixed under vacuum after conjunction, 50 DEG C of ultrasound 3h, then cold
But, filter, clean obtained solid substance, powder, that is, modifying agent of the obtained solid substance after vacuum drying with deionized water.
Directly carbon nanotube or metal oxide are added in screw-thread steel as a raw material for production, will lead to various substances
Dosage significantly increase, while mixing time increases, the production cost of significant increased screw-thread steel, and passes through modified aluminium
Modified screw-thread steel, effectively controls cost while can be further improved the toughness of screw-thread steel, will not reduce modified effect.
Same Fe, Mn, Si, V congruent melting of modified aluminium, carbon nanotube and metal oxide enter in molten system in modified aluminium, aluminium
It is distributed to inside molten steel with carbon nanotube, improves the toughness of screw-thread steel.
Preferably, in the electric furnace smelting process, including the first and second heating processes, in the first heating process, in advance
800 ~ 900 DEG C of heat；Second heating process is rapidly heated to 1000 ~ 1350 DEG C.First each material mixing can be effectively reduced not in preheating
Uniform situation, yield can effectively be improved by being rapidly heated.
Preferably, tapping to 1/5 ~ 1/4 when carbon dust is added, argon gas stirs 0.1 ~ 0.3MPa in tapping process.C can be effective
Raising steel intensity, guarantee the normal use of screw-thread steel, argon gas stirring stirring should not excessively acutely.
A kind of high-plasticity screw-thread steel, according to screw-thread steel made from above-mentioned preparation method.
Compared with prior art, the device have the advantages that being：C, Mn, Ni, P, Cu are compounded into manufactured close with Fe
Gold can effectively improve the intensity of screw-thread steel, while will not influence the intensity of screw-thread steel；Carbon nanotube or metal oxidation
Object effectively controls cost while can be further improved the toughness of screw-thread steel by the modified screw-thread steel of modified aluminium,
Modified effect will not be reduced.
Specific embodiment
Following implementation column is to further explanation of the invention, is not limitation of the present invention.
Embodiment 1
A kind of high-plasticity screw-thread steel and preparation method thereof, 950 mass parts of the pig iron, 55 mass parts of aluminium ingot, institute
2.5 mass parts of vanadium ingot stated, 6 mass parts of ferrosilicon, 35 mass parts of manganeisen, 15 mass of ferrophosphorus
Part.The aluminium ingot is modified aluminium ingot.
Modification on Al is made by the following method：
100 mass parts of aluminium ingot are taken, cast molding after 8 mass parts of modifying agent stirring 2h is added after vacuum fusion；
The modifying agent includes 3 mass parts of carbon nanotube, 18 mass parts of pure aluminium powder, 2 mass parts of nano-cerium oxide, nano oxygen
Change 4 mass parts of copper, 6 mass parts of chrome green；The same nano-cerium oxide of carbon nanotube, nano cupric oxide and chrome green are mixed
With pure aluminium powder, ball milling, resulting mixed-powder are added in ethyl alcohol and are uniformly mixed under vacuum after conjunction, 50 DEG C of ultrasound 3h, then cold
But, filter, clean obtained solid substance, powder, that is, modifying agent of the obtained solid substance after vacuum drying with deionized water.
It include successively electric furnace smelting, external refining, continuous casting, hot rolling, cooling, cutting and tack process, in the electric furnace smelting process,
Fe, Mn, Si, Al, V congruent melting are stirred, ferrophosphorus is added in external refining process.Carbon dust, tapping process is added when tapping to 1/4
Middle argon gas stirs 0.3MPa.In the electric furnace smelting process, including the first and second heating processes, in the first heating process,
900 DEG C of preheating；Second heating process is rapidly heated to 1350 DEG C.
C is intensified element most basic in steel, and C content is every to increase by 0.01%, the tensile strength increase about 10MPa of steel；Mn
It is mainly used for increasing steel strength, while reduces S in ore and damaging；Al, V can effectively improve the plasticity or tough of steel
Property, the anticorrosion effect of steel is improved with pig iron smelting by carbon dust, ferrophosphorus, ferrosilicon, manganeisen, nickel ingot, copper ingot.
C, Mn, Ni, P, Cu are compounded into manufactured alloy with Fe, can effectively improve the intensity of screw-thread steel, while not
It will affect the intensity of screw-thread steel.Modified aluminium can significantly improve the toughness of steel.
Composite effect of the carbon nanotube with aluminium powder can be enhanced with metal oxide mixing in carbon nanotube, later with aluminium powder ball
It is pre-dispersed into aluminium powder that mill can make carbon nanotube, and then be added in ethyl alcohol and be uniformly mixed, and ultrasound fills carbon nanotube
That divides is distributed in aluminium powder, compound with aluminium powder, obtains modifying agent.
Directly carbon nanotube or metal oxide are added in screw-thread steel as a raw material for production, will lead to various substances
Dosage significantly increase, while mixing time increases, the production cost of significant increased screw-thread steel, and passes through modified aluminium
Modified screw-thread steel, effectively controls cost while can be further improved the toughness of screw-thread steel, will not reduce modified effect.
First the non-uniform situation of each material mixing can be effectively reduced in preheating, and yield can effectively be improved by being rapidly heated.
C can effectively improve the intensity of steel, guarantee the normal use of screw-thread steel, argon gas stirring stirring should not be excessively acute
It is strong.First the non-uniform situation of each material mixing can be effectively reduced in preheating, and yield can effectively be improved by being rapidly heated.
Embodiment 2
Embodiment 2 and embodiment 1 the difference is that, successively include electric furnace smelting, external refining, continuous casting, hot rolling, cooling, cut
Cut with tack process, in the electric furnace smelting process, the pig iron, aluminium ingot and vanadium ingot congruent melting are stirred, electric furnace smelting is outer smart to furnace
Ferrosilicon and manganeisen are added during refining, ferrophosphorus, 900 mass parts of the pig iron, institute are added in external refining process
0.2 mass parts of aluminium ingot stated, 0.5 mass parts of vanadium ingot, 5 mass parts of ferrosilicon, 30 mass of manganeisen
Part, 10 mass parts of ferrophosphorus.
Embodiment 3
Embodiment 3 and embodiment 1 the difference is that, successively include electric furnace smelting, external refining, continuous casting, hot rolling, cooling, cut
Cut with tack process, in the electric furnace smelting process, the pig iron, aluminium ingot and vanadium ingot congruent melting are stirred, electric furnace smelting is outer smart to furnace
Ferrosilicon and manganeisen are added during refining, ferrophosphorus, 1000 mass parts of the pig iron, institute are added in external refining process
60 mass parts of aluminium ingot stated, 3.5 mass parts of vanadium ingot, 9 mass parts of ferrosilicon, 50 mass of manganeisen
Part, 25 mass parts of ferrophosphorus.
Embodiment 4
Embodiment 4 and embodiment 1 the difference is that, the modification aluminium ingot is made by the following method：
90 mass parts of aluminium ingot are taken, cast molding after 5 mass parts of modifying agent stirring 1h is added after vacuum fusion；
The modifying agent includes 2 mass parts of carbon nanotube, 15 mass parts of pure aluminium powder, 1 mass parts of nano-cerium oxide, nano oxygen
Change 2 mass parts of copper, 2 mass parts of chrome green；The same nano-cerium oxide of carbon nanotube, nano cupric oxide and chrome green are mixed
With pure aluminium powder, ball milling, resulting mixed-powder are added in ethyl alcohol and are uniformly mixed under vacuum after conjunction, 50 DEG C of ultrasound 2h, then cold
But, filter, clean obtained solid substance, powder, that is, modifying agent of the obtained solid substance after vacuum drying with deionized water.
Embodiment 5
Embodiment 5 and embodiment 1 the difference is that, the modification aluminium ingot is made by the following method：
120 mass parts of aluminium ingot are taken, cast molding after 10 mass parts of modifying agent stirring 3h is added after vacuum fusion；
The modifying agent includes 4 mass parts of carbon nanotube, 20 mass parts of pure aluminium powder, 3 mass parts of nano-cerium oxide, nano oxygen
Change 6 mass parts of copper, 8 mass parts of chrome green；The same nano-cerium oxide of carbon nanotube, nano cupric oxide and chrome green are mixed
With pure aluminium powder, ball milling, resulting mixed-powder are added in ethyl alcohol and are uniformly mixed under vacuum after conjunction, 50 DEG C of ultrasound 4h, then cold
But, filter, clean obtained solid substance, powder, that is, modifying agent of the obtained solid substance after vacuum drying with deionized water.
Embodiment 6
Embodiment 6 and embodiment 1 the difference is that, in the electric furnace smelting process, including the first and second heating processes,
In first heating process, 800 ~ 900 DEG C are preheated；Second heating process is rapidly heated to 1000 ~ 1350 DEG C.It taps to 1/5 ~ 1/4
When carbon dust is added, in tapping process argon gas stir 0.1 ~ 0.3MPa.
Embodiment 7
Embodiment 7 and embodiment 1 the difference is that, the aluminium is unmodified.
Embodiment 8
Embodiment 8 and embodiment 1 the difference is that, carbon nanotube is not added in the modified aluminium.
Embodiment 9
Embodiment 9 and embodiment 1 the difference is that, be not added in the modified aluminium nano cupric oxide, nano-cerium oxide and
Chrome green.
Experimental example
Preferred embodiment is screened by the plasticity and toughness properties of analysis embodiment 1 ~ 5 and the screw-thread steel of the preparation of embodiment 6 ~ 9.
Ballistic work is used to evaluate the toughness of screw-thread steel, and elongation percentage is used to evaluate the plasticity of screw-thread steel, while measuring each implementation
The tensile strength of example.
1 screw thread steel mechanical property of table
| Elongation percentage（%） | Ballistic work（J） | Tensile strength（MPa） | |
| Embodiment 1 | 51 | 251 | 612 |
| Embodiment 2 | 42 | 213 | 545 |
| Embodiment 3 | 50 | 260 | 555 |
| Embodiment 4 | 43 | 239 | 542 |
| Embodiment 5 | 49 | 244 | 551 |
| Embodiment 6 | 47 | 238 | 599 |
| Embodiment 7 | 27 | 146 | 505 |
| Embodiment 8 | 28 | 152 | 513 |
| Embodiment 9 | 33 | 187 | 506 |
Ballistic work average value when toughness is -40 DEG C of tests in table.
Embodiment 1 ~ 6 is all made of modified aluminium as screw-thread steel and prepares raw material, it can be seen that the plasticity of embodiment 1 ~ 6 and tough
Property performance be significantly better than embodiment 7 ~ 9, show modified aluminium to improve screw-thread steel plasticity and toughness remarkable effect.This hair is used simultaneously
The intensity of bright preparation method, screw-thread steel does not change, and the field of application is not limited because of the change of preparation method
System.
Embodiment 1 is that preferably embodiment, the promotion of plasticity or toughness are effective better than real in embodiment 1 ~ 6
Example 7 is applied, while tensile strength slightly rises compared with embodiment 6, shows and add carbon nanotube and nanogold in modified nickel
Belong to oxide has obvious action to the plasticity/toughness for improving screw-thread steel；The additive amount of various raw materials in embodiment 2 and 3
The additive amount of difference, embodiment 2 is relatively low, causes its plasticity poor compared with embodiment 1 and 3 with toughness, but still significant excellent
It is higher in the various raw material additive amounts of embodiment 7 ~ 9, embodiment 3, but plasticity and toughness promote effect not significantly better than implementation
Example 1, while higher cost, therefore embodiment 1 is more preferably embodiment.
Embodiment 4 and 5 is mainly in aluminium modifying process, and influence of the different material additive amount to screw thread steel mechanical property can
To find out that embodiment 4 is larger with the difference of embodiment 1, show that additive amount is unsuitable too low, embodiment 5 with embodiment 1 difference not
Greatly, show within the scope of preferred implementation of the invention, the raising of steel plasticity and toughness makes more significantly, when the addition of raw material reaches
Technical solution of the present invention bring plasticity/toughness improvement effect can't occur significantly to change after a certain amount of, while power
It is also relatively stable to learn performance.
Embodiment 6 is wanted to compare with embodiment 1, the difference is that the mode smelted is different, various temperature are relatively low, but embodiment
The improvement of 6 pairs of plasticity and toughness just now is still more obvious, shows that the present invention is mainly same raw material to the raising of screw-thread steel plasticity and toughness
Proportion realize, the influence for smelting preparation method is smaller.
Modified aluminium is not added in embodiment 7, plasticity or toughness properties are poor, further illustrate aluminium in the present invention and change
The necessity of property；The not carbon nanotubes of embodiment 8, plasticity and toughness increase compared with embodiment 6, but limited extent；Implement
Example 9 is only added to carbon nanotube, and compared with embodiment 7, the promotion of plasticity or toughness is more significant, shows that carbon nanotube may be right
The raising of screw-thread steel plasticity or toughness plays more crucial effect.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and above embodiments are not to limit this
The scope of the patents of invention, all equivalence enforcements or change without departing from carried out by the present invention, is intended to be limited solely by the scope of the patents of this case.
Claims (10)
1. a kind of high-plasticity screw-thread steel preparation method includes successively electric furnace smelting, external refining, continuous casting, hot rolling, cooling, cuts
It cuts and tack process, which is characterized in that in the electric furnace smelting process, the pig iron, aluminium ingot and vanadium ingot congruent melting are stirred, electric furnace smelting
Ferrosilicon and manganeisen is added during refining external refining, ferrophosphorus is added in external refining process；The pig iron 900
~ 1000 mass parts, 0.2 ~ 60 mass parts of aluminium ingot, 0.5 ~ 3.5 mass parts of vanadium ingot, 5 ~ 9 mass of ferrosilicon
Part, 30 ~ 50 mass parts of manganeisen, 10 ~ 25 mass parts of ferrophosphorus.
2. high-plasticity screw-thread steel preparation method according to claim 1, which is characterized in that the pig iron 950 ~ 1000
Mass parts, 55 ~ 60 mass parts of aluminium ingot, 2.5 ~ 3.5 mass parts of vanadium ingot, 6 ~ 9 mass parts of ferrosilicon are described
35 ~ 50 mass parts of manganeisen, 15 ~ 25 mass parts of ferrophosphorus.
3. high-plasticity screw-thread steel preparation method according to claim 2, which is characterized in that 950 mass of the pig iron
Part, 55 mass parts of aluminium ingot, 2.5 mass parts of vanadium ingot, 6 mass parts of ferrosilicon, the manganeisen 35
Mass parts, 15 mass parts of ferrophosphorus.
4. high-plasticity screw-thread steel preparation method according to claim 2, which is characterized in that the aluminium ingot is modified aluminium
Ingot.
5. high-plasticity screw-thread steel preparation method according to claim 1, which is characterized in that the modification aluminium ingot passes through
Following methods are made：
90 ~ 120 mass parts of aluminium ingot are taken, 5 ~ 10 mass parts of modifying agent are added after vacuum fusion and stir cast molding after 1 ~ 3h；
The modifying agent includes 2 ~ 4 mass parts of carbon nanotube, 15 ~ 20 mass parts of pure aluminium powder, 1 ~ 3 mass of nano-cerium oxide
Part, 2 ~ 6 mass parts of nano cupric oxide, 2 ~ 8 mass parts of chrome green；By the same nano-cerium oxide of carbon nanotube, nano cupric oxide
With pure aluminium powder, ball milling, resulting mixed-powder are added in ethyl alcohol and are uniformly mixed under vacuum with after chrome green mixing, and 50
DEG C 2 ~ 4h of ultrasound, then it is cooling, filter, clean obtained solid substance with deionized water, obtained solid substance is after being dried in vacuo
Powder, that is, modifying agent.
6. high-plasticity screw-thread steel according to claim 1, which is characterized in that Modification on Al is made by the following method：
100 ~ 120 mass parts of aluminium ingot are taken, 8 ~ 10 mass parts of modifying agent are added after vacuum fusion and stir cast molding after 2 ~ 3h；
The modifying agent includes 3 ~ 4 mass parts of carbon nanotube, 18 ~ 20 mass parts of pure aluminium powder, 2 ~ 3 mass of nano-cerium oxide
Part, 4 ~ 6 mass parts of nano cupric oxide, 6 ~ 8 mass parts of chrome green；By the same nano-cerium oxide of carbon nanotube, nano cupric oxide
With pure aluminium powder, ball milling, resulting mixed-powder are added in ethyl alcohol and are uniformly mixed under vacuum with after chrome green mixing, and 50
DEG C 3 ~ 4h of ultrasound, then it is cooling, filter, clean obtained solid substance with deionized water, obtained solid substance is after being dried in vacuo
Powder, that is, modifying agent.
7. high-plasticity screw-thread steel according to claim 1, which is characterized in that Modification on Al is made by the following method：
100 mass parts of aluminium ingot are taken, cast molding after 8 mass parts of modifying agent stirring 2h is added after vacuum fusion；
The modifying agent includes 3 mass parts of carbon nanotube, 18 mass parts of pure aluminium powder, 2 mass parts of nano-cerium oxide, nano oxygen
Change 4 mass parts of copper, 6 mass parts of chrome green；The same nano-cerium oxide of carbon nanotube, nano cupric oxide and chrome green are mixed
With pure aluminium powder, ball milling, resulting mixed-powder are added in ethyl alcohol and are uniformly mixed under vacuum after conjunction, 50 DEG C of ultrasound 3h, then cold
But, filter, clean obtained solid substance, powder, that is, modifying agent of the obtained solid substance after vacuum drying with deionized water.
8. a kind of high-plasticity screw-thread steel preparation method according to claim 1, which is characterized in that the electric furnace smelting
In process, including the first and second heating processes, in the first heating process, 800 ~ 900 DEG C are preheated；Second heating process, quickly
It is warming up to 1000 ~ 1350 DEG C.
9. a kind of high-plasticity screw-thread steel preparation method according to claim 1, which is characterized in that tapping to 1/5 ~ 1/4
When carbon dust is added, in tapping process argon gas stir 0.1 ~ 0.3MPa.
10. a kind of high-plasticity screw-thread steel, which is characterized in that be made including the described in any item preparation methods of claim 1 ~ 9
Screw-thread steel.
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