CN107119221B - A kind of micro alloyed high strength grey cast iron part and its method of smelting - Google Patents
A kind of micro alloyed high strength grey cast iron part and its method of smelting Download PDFInfo
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- CN107119221B CN107119221B CN201710284060.4A CN201710284060A CN107119221B CN 107119221 B CN107119221 B CN 107119221B CN 201710284060 A CN201710284060 A CN 201710284060A CN 107119221 B CN107119221 B CN 107119221B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
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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
- C22C33/08—Making cast-iron alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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Abstract
The present invention provides a kind of micro alloyed high strength grey cast iron part and its method of smelting, are related to field of metal casting technology, and the gray iron casting contains the component of following weight percentage：C 2.92 3.48%, Si 1.52 2.36%, Mn 0.22 0.78%, Cr 0.15 0.5%, Cu 0.3 0.78%, Nb 0.011 0.098%, V 0.02 0.1%, Ti 0.015 0.025%, remaining is iron and other micro inevitable impurity, the present invention strengthens casting matrix by microalloying, improve the strength and stiffness of casting, effective inoculation agent is added, graphite form can be effectively improved, hardness, structural homogenity and reduction sensibility, promote the mechanical performance of gray iron casting, by the way of mould cavity inoculation, the utilization rate of inovulant can be improved, improve pregnant effect, reduce cost.
Description
Technical field
The present invention relates to field of metal casting technology, and in particular to a kind of micro alloyed high strength grey cast iron part and its melting side
Method.
Background technology
Gray cast iron is occupied an important position as traditional metal material in Foundry Production, although gray cast iron is alive in recent years
Shared ratio is declined in boundary's cast iron total output, but statistical data shows that gray cast iron still occupies importantly in ironcasting
Position.At present under energy-saving, automotive light weight technology situation in the world, gray cast iron material is remained to obtain and so widely be answered
With, with its good casting formability, high intensity, anti-attrition, damping property and it is of low cost the features such as it is inseparable.
At present China high-strength gray cast iron research with have that casting strength is low in production technology with external main gap,
Same molten iron studies point casting produced, and intensity is than the external low 1-2 trades mark；Casting technique falls behind, casting section thickness
Greatly, weight is big, and if lathe class casting is than 10% or more external weight, engine cylinder body is than 30% or more external weight；With casting system
The automobile board or engine cylinder body made wear no resistance, the service life is low, and sensitivity profile is big, poor processability.
The approach for improving the mechanical property of gray iron casting at present is mainly the following：Change the silicon carbon ratio in gray iron casting
Example, the selection of inovulant and inoculation mode, heat treatment mode and alloying.
Invention content
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of micro alloyed high strength grey cast iron part and its melting sides
Method so that the gray iron casting produced while with very high strength also with other good mechanical properties, and machinery
Processing performance is good, and thickness is uniform.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs：
A kind of micro alloyed high strength grey cast iron part, the component containing following weight percentage：C 2.92-3.48%,
Si 1.52-2.36%, Mn 0.22-0.78%, Cr 0.15-0.5%, Cu 0.3-0.78%, Nb 0.011-0.098%, V
0.02-0.1%, Ti 0.015-0.025%, remaining be iron and other micro inevitable impurity.
Preferably, the micro alloyed high strength grey cast iron part contains the component of following weight percentage：C 3.15%,
Si 1.82%, Mn 0.5%, Cr 0.36%, Cu 0.74%, Nb 0.035%, V 0.08%, Ti 0.017%, remaining be
Iron and other inevitable impurity.
The method of smelting of above-mentioned micro alloyed high strength grey cast iron part, includes the following steps：
(1) furnace charge and carburant are added into smelting furnace burner hearth, heating is melted；
(2) it after furnace charge is completely melt, is transferred in holding furnace, is warming up to 1450-1480 DEG C and manganeisen, ferrochrome conjunction is added
Gold, niobium vanadium alloy, Antaciron and metallic copper；
(3) after alloy and metallic copper dissolve completely, be continuously heating to 1500-1520 DEG C, with spectrometer carry out chemistry at
It analyzes, after chemical composition analysis qualification, is warming up to 1550-1580 DEG C, and in this temperature 5-10min；
(4) rapidly that the processing of the bits on iron liquid surface is clean, start to come out of the stove, control tapping temperature, will at 1500-1530 DEG C
Molten iron pours the packet that taps a blast furnace, and titanium valve is added in a manner of with stream, can be poured into a mould after pulling out Slag treatment, sets inovulant before cast
In in the running gate system of casting mold, when cast, the iron liquid for flowing through running gate system melts inovulant, and enters casting cavity therewith
Interior, the addition of the inovulant is the 0.06-0.1% of iron liquid amount, and control pouring temperature is 1450-1480 DEG C, the duration of pouring
For 15-30s, casting is obtained after cooling；
(5) by casting shove charge at room temperature, then with the speed of 100 DEG C/h it is heated to 510-540 DEG C, and kept the temperature at this temperature
5h, then slowly cooled to after 230 DEG C with stove come out of the stove it is air-cooled, you can obtain the gray iron casting.
Preferably, furnace charge includes the high-quality steel scrap of low-carbon, foundry pig iron and foundry returns in the step (1).
Preferably, the inovulant in the step (4) contains the component of following weight percentage：Si 50-60%, Cr
10-15%, Ba 1-5%, V 2-8%, Al 1-5%, Ca 2-5%, Zr 0.1-1%, remaining is iron.
Preferably, the inovulant in the step (4) is prepared by following methods：Phase is taken by the component of the inovulant
The material allocation mixed smelting of corresponding weight percentage, vacuum stages cooling down, then crushed through pulverizer, you can it obtains
The inovulant.
Preferably, the grain size of titanium valve is 5-10mm in the step (4).
(3) advantageous effect
The present invention provides a kind of micro alloyed high strength grey cast iron part and its method of smelting, have the following advantages：
1, the present invention strengthens casting matrix by microalloying, improves the strength and stiffness of casting, and Nb, V and Ti can be with
Nonmetalloid C, N, Si in iron liquid can react, and form the small particles such as carbide, nitride, refine the pearl in matrix
Body of light, Mn and Cr can promote pearlite to be formed, and play the role of certain refinement pearlite, thus help to improve gray iron casting
Intensity, Cu, which is added, can be such that the ferrite at thick section reduces, while can mitigate the spoken parts in traditional operas at thin-walled again, make at each section of casting
Microscopic structure than more consistent, improve the uniformity of casting microscopic structure, thus the processing performance of casting can be improved, while Cu
The negative effect that Cr can be offset mitigates the chilling tendency of cast iron.
2, the overtemperature of control holding furnace is 1550-1580 DEG C, and soaking time 5-10min can effectively control iron
The content of sulphur and oxygen in liquid, and dystectic compound in iron liquid can form substrate, in the iron liquid after coming out of the stove
Spontaneous nucleus it is relatively more.The tapping temperature of iron liquid is controlled at 1500-1530 DEG C, can effectively avoid casting this body tissue graphite
The coarse and partially long problem of graphite length.
3, effective inoculation agent is added, graphite form, hardness, structural homogenity can be effectively improved and reduces sensibility,
The mechanical performance of gray iron casting is promoted, hardness is improved, reduces chilling tendency.Wherein, Ba can generate stable compound, casting with oxygen
Not baric after iron solidification, and the oxide that its long-acting anti-ageing ability of moving back is considered as barium forms " air-casing " on molten iron surface, resistance
Block and nitrogen dissolve in.Al is less than 2% in inovulant, is influenced on air content little.But as strong deoxidier, can in molten iron shape
At protective oxide layer, the negative effect of nitrogen is reduced, extends the inoculation(effect) time.Enough Si can be with the oxygen in molten iron in inovulant
Generate a large amount of graphite crystal nucleus, can intensive inoculation effect, larger amount of Cr is added in inovulant, it is possible to reduce carbide and can be with
Significantly improve the directionality of carbide.
4, using mould cavity inoculation, inoculation fade phenomenon do not occur substantially for the casting that breeds in casting mold, inovulant it is effective
Utilization rate greatly increases.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention,
Technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is the present invention one
Divide embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, shall fall within the protection scope of the present invention.
Embodiment 1：
A kind of micro alloyed high strength grey cast iron part, the component containing following weight percentage：C 3.15%, Si
1.82%, Mn 0.5%, Cr 0.36%, Cu 0.74%, Nb 0.035%, V 0.08%, Ti 0.017%, remaining be iron
With other inevitable impurity.
The method of smelting of above-mentioned micro alloyed high strength grey cast iron part, includes the following steps：
(1) furnace charge and carburant are added into smelting furnace burner hearth, heating is melted；
(2) it after furnace charge is completely melt, is transferred in holding furnace, is warming up to 1450-1480 DEG C and manganeisen, ferrochrome conjunction is added
Gold, niobium vanadium alloy, Antaciron and metallic copper；
(3) after alloy and metallic copper dissolve completely, be continuously heating to 1500-1520 DEG C, with spectrometer carry out chemistry at
It analyzes, after chemical composition analysis qualification, is warming up to 1550-1580 DEG C, and in this temperature 8min；
(4) rapidly that the processing of the bits on iron liquid surface is clean, start to come out of the stove, control tapping temperature, will at 1500-1530 DEG C
Molten iron pours the packet that taps a blast furnace, and the titanium valve that grain size is 5-10mm is added in a manner of with stream, can be poured into a mould, be poured after pulling out Slag treatment
Inovulant is placed in the running gate system of casting mold before note, when cast, the iron liquid for flowing through running gate system melts inovulant, and therewith
Into in casting cavity, the addition of the inovulant is the 0.08% of iron liquid amount, and control pouring temperature is 1450-1480 DEG C,
The duration of pouring is 20s, and casting is obtained after cooling；
(5) by casting shove charge at room temperature, then with the speed of 100 DEG C/h it is heated to 510-540 DEG C, and kept the temperature at this temperature
5h, then slowly cooled to after 230 DEG C with stove come out of the stove it is air-cooled, you can obtain the gray iron casting.
Wherein, the inovulant in step (4) contains the component of following weight percentage：Si 55%, Cr 15%, Ba
3%, V 5%, Al 3%, Ca 2%, Zr 0.5%, remaining is iron；
The inovulant is prepared by following methods：The raw material of corresponding weight percentage is taken by the component of inovulant
Mixed smelting, vacuum stages cooling down are allocated, then is crushed through pulverizer, you can obtains inovulant.
Embodiment 2：
A kind of micro alloyed high strength grey cast iron part, the component containing following weight percentage：C 2.92%, Si
2.15%, Mn 0.3%, Cr 0.5%, Cu 0.3%, Nb 0.011%, V 0.05%, Ti 0.025%, remaining for iron and
Other inevitable impurity.
The method of smelting of above-mentioned micro alloyed high strength grey cast iron part, includes the following steps：
(1) furnace charge and carburant are added into smelting furnace burner hearth, heating is melted；
(2) it after furnace charge is completely melt, is transferred in holding furnace, is warming up to 1450-1480 DEG C and manganeisen, ferrochrome conjunction is added
Gold, niobium vanadium alloy, Antaciron and metallic copper；
(3) after alloy and metallic copper dissolve completely, be continuously heating to 1500-1520 DEG C, with spectrometer carry out chemistry at
It analyzes, after chemical composition analysis qualification, is warming up to 1550-1580 DEG C, and in this temperature 10min；
(4) rapidly that the processing of the bits on iron liquid surface is clean, start to come out of the stove, control tapping temperature, will at 1500-1530 DEG C
Molten iron pours the packet that taps a blast furnace, and the titanium valve that grain size is 5-10mm is added in a manner of with stream, can be poured into a mould, be poured after pulling out Slag treatment
Inovulant is placed in the running gate system of casting mold before note, when cast, the iron liquid for flowing through running gate system melts inovulant, and therewith
Into in casting cavity, the addition of the inovulant is the 0.06% of iron liquid amount, and control pouring temperature is 1450-1480 DEG C,
The duration of pouring is 25s, and casting is obtained after cooling；
(5) by casting shove charge at room temperature, then with the speed of 100 DEG C/h it is heated to 510-540 DEG C, and kept the temperature at this temperature
5h, then slowly cooled to after 230 DEG C with stove come out of the stove it is air-cooled, you can obtain the gray iron casting.
Wherein, the inovulant in step (4) contains the component of following weight percentage：Si 55%, Cr 15%, Ba
3%, V 5%, Al 3%, Ca 2%, Zr 0.5%, remaining is iron；
The inovulant is prepared by following methods：The raw material of corresponding weight percentage is taken by the component of inovulant
Mixed smelting, vacuum stages cooling down are allocated, then is crushed through pulverizer, you can obtains inovulant.
Embodiment 3：
A kind of micro alloyed high strength grey cast iron part, the component containing following weight percentage：C 3.48%, Si
1.52%, Mn 0.78%, Cr 0.15%, Cu 0.78%, Nb 0.05%, V 0.1%, Ti 0.02%, remaining for iron and
Other inevitable impurity.
The method of smelting of above-mentioned micro alloyed high strength grey cast iron part, includes the following steps：
(1) furnace charge and carburant are added into smelting furnace burner hearth, heating is melted；
(2) it after furnace charge is completely melt, is transferred in holding furnace, is warming up to 1450-1480 DEG C and manganeisen, ferrochrome conjunction is added
Gold, niobium vanadium alloy, Antaciron and metallic copper；
(3) after alloy and metallic copper dissolve completely, be continuously heating to 1500-1520 DEG C, with spectrometer carry out chemistry at
It analyzes, after chemical composition analysis qualification, is warming up to 1550-1580 DEG C, and in this temperature 5min；
(4) rapidly that the processing of the bits on iron liquid surface is clean, start to come out of the stove, control tapping temperature, will at 1500-1530 DEG C
Molten iron pours the packet that taps a blast furnace, and the titanium valve that grain size is 5-10mm is added in a manner of with stream, can be poured into a mould, be poured after pulling out Slag treatment
Inovulant is placed in the running gate system of casting mold before note, when cast, the iron liquid for flowing through running gate system melts inovulant, and therewith
Into in casting cavity, the addition of the inovulant is the 0.1% of iron liquid amount, and control pouring temperature is 1450-1480 DEG C, is poured
The note time is 15s, and casting is obtained after cooling；
(5) by casting shove charge at room temperature, then with the speed of 100 DEG C/h it is heated to 510-540 DEG C, and kept the temperature at this temperature
5h, then slowly cooled to after 230 DEG C with stove come out of the stove it is air-cooled, you can obtain the gray iron casting.
Wherein, the inovulant in step (4) contains the component of following weight percentage：Si 55%, Cr 15%, Ba
3%, V 5%, Al 3%, Ca 2%, Zr 0.5%, remaining is iron；
The inovulant is prepared by following methods：The raw material of corresponding weight percentage is taken by the component of inovulant
Mixed smelting, vacuum stages cooling down are allocated, then is crushed through pulverizer, you can obtains inovulant.
Embodiment 4：
A kind of micro alloyed high strength grey cast iron part, the component containing following weight percentage：C 3%, Si
2.36%, Mn 0.66%, Cr 0.41%, Cu 0.59%, Nb 0.098%, V 0.02%, Ti 0.023%, remaining be iron
With other inevitable impurity.
The method of smelting of above-mentioned micro alloyed high strength grey cast iron part, includes the following steps：
(1) furnace charge and carburant are added into holding furnace burner hearth, heating is melted；
(2) it after furnace charge is completely melt, is transferred in holding furnace, is warming up to 1450-1480 DEG C and manganeisen, ferrochrome conjunction is added
Gold, niobium vanadium alloy, Antaciron and metallic copper；
(3) after alloy and metallic copper dissolve completely, be continuously heating to 1500-1520 DEG C, with spectrometer carry out chemistry at
It analyzes, after chemical composition analysis qualification, is warming up to 1550-1580 DEG C, and in this temperature 8min；
(4) rapidly that the processing of the bits on iron liquid surface is clean, start to come out of the stove, control tapping temperature, will at 1500-1530 DEG C
Molten iron pours the packet that taps a blast furnace, and the titanium valve that grain size is 5-10mm is added in a manner of with stream, can be poured into a mould, be poured after pulling out Slag treatment
Inovulant is placed in the running gate system of casting mold before note, when cast, the iron liquid for flowing through running gate system melts inovulant, and therewith
Into in casting cavity, the addition of the inovulant is the 0.06% of iron liquid amount, and control pouring temperature is 1450-1480 DEG C,
The duration of pouring is 28s, and casting is obtained after cooling；
(5) by casting shove charge at room temperature, then with the speed of 100 DEG C/h it is heated to 510-540 DEG C, and kept the temperature at this temperature
5h, then slowly cooled to after 230 DEG C with stove come out of the stove it is air-cooled, you can obtain the gray iron casting.
Wherein, the inovulant in step (4) contains the component of following weight percentage：Si 55%, Cr 15%, Ba
3%, V 5%, Al 3%, Ca 2%, Zr 0.5%, remaining is iron；
The inovulant is prepared by following methods：The raw material of corresponding weight percentage is taken by the component of inovulant
Mixed smelting, vacuum stages cooling down are allocated, then is crushed through pulverizer, you can obtains inovulant.
Embodiment 5：
A kind of micro alloyed high strength grey cast iron part, the component containing following weight percentage：C 3.2%, Si
2.11%, Mn 0.22%, Cr 0.27%, Cu 0.64%, Nb 0.073%, V 0.06%, Ti 0.015%, remaining be iron
With other inevitable impurity.
The method of smelting of above-mentioned micro alloyed high strength grey cast iron part, includes the following steps：
(1) furnace charge and carburant are added into smelting furnace burner hearth, heating is melted；
(2) it after furnace charge is completely melt, is transferred in holding furnace, is warming up to 1450-1480 DEG C and manganeisen, ferrochrome conjunction is added
Gold, niobium vanadium alloy, Antaciron and metallic copper；
(3) after alloy and metallic copper dissolve completely, be continuously heating to 1500-1520 DEG C, with spectrometer carry out chemistry at
It analyzes, after chemical composition analysis qualification, is warming up to 1550-1580 DEG C, and in this temperature 10min；
(4) rapidly that the processing of the bits on iron liquid surface is clean, start to come out of the stove, control tapping temperature, will at 1500-1530 DEG C
Molten iron pours the packet that taps a blast furnace, and the titanium valve that grain size is 5-10mm is added in a manner of with stream, can be poured into a mould, be poured after pulling out Slag treatment
Inovulant is placed in the running gate system of casting mold before note, when cast, the iron liquid for flowing through running gate system melts inovulant, and therewith
Into in casting cavity, the addition of the inovulant is the 0.06% of iron liquid amount, and control pouring temperature is 1450-1480 DEG C,
The duration of pouring is 30s, and casting is obtained after cooling；
(5) by casting shove charge at room temperature, then with the speed of 100 DEG C/h it is heated to 510-540 DEG C, and kept the temperature at this temperature
5h, then slowly cooled to after 230 DEG C with stove come out of the stove it is air-cooled, you can obtain the gray iron casting.
Wherein, the inovulant in step (4) contains the component of following weight percentage：Si 55%, Cr 15%, Ba
3%, V 5%, Al 3%, Ca 2%, Zr 0.5%, remaining is iron；
The inovulant is prepared by following methods：The raw material of corresponding weight percentage is taken by the component of inovulant
Mixed smelting, vacuum stages cooling down are allocated, then is crushed through pulverizer, you can obtains inovulant.
Performance detection：
Gray iron casting performance test results prepared in accordance with the present invention are as shown in table 1：
1 performance detection of table
To sum up, the embodiment of the present invention has the advantages that：Preparation process is simple, manufactured gray iron casting tensile strength
Height, yield strength is big, and hardness is high, can meet the market demand.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features；And these modification or
It replaces, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (6)
1. a kind of micro alloyed high strength grey cast iron part, which is characterized in that the component containing following weight percentage：C
2.92-3.48%, Si 1.52-2.36%, Mn 0.22-0.78%, Cr0.15-0.5%, Cu 0.3-0.78%, Nb
0.011-0.098%, V 0.02-0.1%, Ti0.015-0.025%, remaining be iron and other inevitable impurity；
The method of smelting of above-mentioned micro alloyed high strength grey cast iron part, includes the following steps：
(1) furnace charge and carburant are added into smelting furnace burner hearth, heating is melted；
(2) after furnace charge is completely melt, be transferred in holding furnace, be warming up to 1450-1480 DEG C be added manganeisen, ferrochrome,
Niobium vanadium alloy, Antaciron and metallic copper；
(3) after alloy and metallic copper are completely melt, it is continuously heating to 1500-1520 DEG C, chemical composition point is carried out with spectrometer
It analyses, after chemical composition analysis qualification, is warming up to 1550-1580 DEG C, and in this temperature 5-10min；
(4) rapidly that the processing of the bits on iron liquid surface is clean, start to come out of the stove, control tapping temperature is at 1500-1530 DEG C, by molten iron
The packet that taps a blast furnace is poured, titanium valve is added in a manner of with stream, can be poured into a mould after taking off Slag treatment, is placed in inovulant before cast
In the running gate system of casting mold, when cast, the iron liquid for flowing through running gate system melts inovulant, and enters in casting cavity therewith,
The addition of the inovulant is the 0.06-0.1% of iron liquid amount, and control pouring temperature is 1450-1480 DEG C, and the duration of pouring is
15-30s obtains casting after cooling；
(5) by casting shove charge at room temperature, then with the speed of 100 DEG C/h it is heated to 510-540 DEG C, and keeps the temperature 5h at this temperature,
Then slowly cooled to after 230 DEG C with stove come out of the stove it is air-cooled, you can obtain the gray iron casting.
2. micro alloyed high strength grey cast iron part as described in claim 1, which is characterized in that contain following weight percentage
Component：C 3.15%, Si 1.82%, Mn 0.5%, Cr 0.36%, Cu 0.74%, Nb 0.035%, V 0.08%, Ti
0.017%, remaining is iron and other inevitable impurity.
3. micro alloyed high strength grey cast iron part as described in claim 1, which is characterized in that furnace charge packet in the step (1)
Include the high-quality steel scrap of low-carbon, foundry pig iron and foundry returns.
4. micro alloyed high strength grey cast iron part as described in claim 1, which is characterized in that breeding in the step (4)
Agent contains the component of following weight percentage：Si 50-60%, Cr 10-15%, Ba 1-5%, V 2-8%, Al 1-5%,
Ca 2-5%, Zr 0.1-1%, remaining is iron.
5. micro alloyed high strength grey cast iron part as claimed in claim 4, which is characterized in that breeding in the step (4)
Agent is prepared by following methods：The material allocation of corresponding weight percentage is taken to mix by the component of the inovulant molten
Refining, vacuum stages cooling down, then crushed through pulverizer, you can obtain the inovulant.
6. micro alloyed high strength grey cast iron part as claimed in claim 4, which is characterized in that titanium valve in the step (4)
Grain size is 5-10mm.
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| JP6993646B2 (en) * | 2018-04-24 | 2022-01-13 | 株式会社ファンドリーサービス | Inoculant for cast iron |
| CN110527897A (en) * | 2019-09-20 | 2019-12-03 | 西安飞机工业（集团）有限责任公司 | A method of improving HTCu1.8 alloy cast iron intensity |
| CN113737084A (en) * | 2021-08-26 | 2021-12-03 | 共享装备股份有限公司 | Production method of high-strength gray iron casting |
| CN114574752B (en) * | 2022-02-25 | 2023-02-28 | 宁国东方碾磨材料股份有限公司 | Free-cutting gray cast iron alloy for cylinder block and preparation method thereof |
| CN114558997B (en) * | 2022-02-25 | 2024-02-20 | 宁国东方碾磨材料股份有限公司 | Inoculant for improving processability of high-strength gray cast iron and preparation method of gray cast iron |
| CN117144234B (en) * | 2023-02-01 | 2025-03-04 | 广东中天创展球铁有限公司 | Wear-resistant gray cast iron large disc casting and preparation process thereof |
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| CN1653202A (en) * | 2002-05-13 | 2005-08-10 | 斯堪尼亚有限公司 | Gray cast iron alloy and cast internal combustion engine component |
| CN101418413A (en) * | 2008-09-24 | 2009-04-29 | 上海大学 | Niobium alloy cast iron brake disk material and technique for producing the same |
| CN103282528A (en) * | 2010-12-02 | 2013-09-04 | 斯堪尼亚商用车有限公司 | Grey iron alloy and brake disc containing grey iron alloy |
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| JP4372364B2 (en) * | 2001-01-23 | 2009-11-25 | 日鉄住金ロールズ株式会社 | Single layer sleeve roll for hot rolling made by centrifugal casting |
| KR101409877B1 (en) * | 2011-11-14 | 2014-06-20 | 엘지전자 주식회사 | Alloy cast iron and manufacturing method of vane using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1653202A (en) * | 2002-05-13 | 2005-08-10 | 斯堪尼亚有限公司 | Gray cast iron alloy and cast internal combustion engine component |
| CN101418413A (en) * | 2008-09-24 | 2009-04-29 | 上海大学 | Niobium alloy cast iron brake disk material and technique for producing the same |
| CN103282528A (en) * | 2010-12-02 | 2013-09-04 | 斯堪尼亚商用车有限公司 | Grey iron alloy and brake disc containing grey iron alloy |
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