CN103388104B - A kind of refractory alloy and preparation method thereof - Google Patents
A kind of refractory alloy and preparation method thereof Download PDFInfo
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- 229910000753 refractory alloy Inorganic materials 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 55
- 239000000463 material Substances 0.000 claims abstract description 20
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 7
- 239000011573 trace mineral Substances 0.000 claims abstract description 7
- 235000013619 trace mineral Nutrition 0.000 claims abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 83
- 239000010959 steel Substances 0.000 claims description 83
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 36
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 33
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 31
- 239000002994 raw material Substances 0.000 claims description 29
- 239000003795 chemical substances by application Substances 0.000 claims description 28
- 229910000805 Pig iron Inorganic materials 0.000 claims description 22
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 15
- 108010038629 Molybdoferredoxin Proteins 0.000 claims description 14
- HBELESVMOSDEOV-UHFFFAOYSA-N [Fe].[Mo] Chemical compound [Fe].[Mo] HBELESVMOSDEOV-UHFFFAOYSA-N 0.000 claims description 14
- 238000010079 rubber tapping Methods 0.000 claims description 13
- 239000002893 slag Substances 0.000 claims description 13
- 229910001220 stainless steel Inorganic materials 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 8
- 230000003068 static effect Effects 0.000 claims description 8
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 claims description 4
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- 235000012255 calcium oxide Nutrition 0.000 claims description 3
- 239000010436 fluorite Substances 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 229910001018 Cast iron Inorganic materials 0.000 abstract description 5
- 239000004615 ingredient Substances 0.000 abstract description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 11
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 6
- 239000000956 alloy Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 244000044283 Toxicodendron succedaneum Species 0.000 description 3
- 238000009415 formwork Methods 0.000 description 3
- 238000005495 investment casting Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000571 coke Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Abstract
Each Ingredient percent contained by refractory alloy of the present invention is: Cr:33.0-35.0%, Mo:2.0-2.5%, Si:1.8-2.2%, C:1.0-1.4%, Mn:0.1-0.6.%, Ni:0.01-0.5%, P:0.01-0.06%, S:0.01-0.04%, surplus be Fe and inevitably trace element, under this kind of cast iron room temperature, tensile strength can reach σ b >=600MPa, material wear-resisting, resistance toheat is better, be applicable to working in high temperature environments, working temperature can reach 700-950 DEG C.Manufacturing cost is lower simultaneously, is easy to promotion and application.
Description
Technical field
The present invention relates to the technical field of cast iron metallurgy, specifically a kind of refractory alloy and preparation method thereof.
Background technology
Spheroidal graphite cast iron in the market adds a large amount of steel scraps and foundry return during fabrication, such as application number is " CN201110313761.9 ", name is called the patent of invention of " a kind of spheroidal graphite cast iron and production method thereof ", describe a kind of spheroidal graphite cast iron and production method thereof, the raw material adopted is with parts by weight: pig iron 45-50; Steel scrap 25-30; Foundry return 20-25; Coke granule 1-1.5.Production process is: all put in stove by steel scrap, when steel scrap starts to melt, adds coke granule and adds rapidly the pig iron and cover, when the pig iron starts to melt, progressively add foundry returns, whole load melting completely after slag hitting, come out of the stove, carry out inoculation, obtain spheroidal graphite cast iron.Above-mentioned technique is substantially traditional at production cast condition ductile iron formula, increase the input amount of steel scrap, reduce the consumption of the pig iron, separately in base iron, do not add ferromanganese and ferrosilicon, by the optimization of carburetting and melting technology, obtain cast condition ductile iron, although manufacturing cost significantly reduces, hardness is placed in the middle, is only applicable in mechanical workout, but heat-resisting, wear no resistance, cannot high-temperature work environment be applicable to.
Such as application number is " CN201110329105.8 " again, name is called the patent of invention of " a kind of Large-cross-section nodular cast iron ", disclose a kind of Large-cross-section nodular cast iron, belong to cast iron metallurgical technology field, the mass percent of this Large-cross-section nodular cast iron is: C:3.5%-3.7%, Si:1.8%-1.9%, Mn:0.1%-0.2%, P:0.045%-0.05%, S:0.01%-0.015%, Re:0.018%-0.02%, Mg:0.05%-0.055%, Cu:0.5%, surplus be Fe and inevitably trace element.Although this Large-cross-section nodular cast iron high tenacity, ferrite content and Oxygen potential are all very high, but be only suitable for the foundry goods of all kinds of high strength, HI high impact merit machine tool, but heat-resisting, wear no resistance, cannot high-temperature work environment be applicable to, the accessory of turbo-supercharger cannot be made, use limitation larger.Existing cast iron process complex process simultaneously, cost of manufacture is very high.
Summary of the invention
The object of the present invention is to provide refractory alloy of a kind of improvement and preparation method thereof, it can overcome heat-resisting in prior art, wear no resistance, the some shortcomings of high-temperature work environment cannot be applicable to.Because the part use temperature on some automobile turbocharger reaches 550-650 degree, original high chromium spheroidal graphite cast iron cannot meet its service requirements, thus needs new material to substitute.The raw material metal primary smelting that this kind of refractory alloy adopts domestic market common becomes to carry out pouring cast part, employing be more ripe precision casting process, technique and operation are relatively simple and easy to grasp, and manufacturing cost is lower.
To achieve these goals, technical scheme of the present invention is: a kind of refractory alloy, is characterized in that: described refractory alloy formula is as follows: the mass percent of each composition is: Cr:33.0-35.0%, Mo:2.0-2.5%, Si:1.8-2.2%, C:1.0-1.4%, Mn:0.1-0.6.%, Ni:0.01-0.5%, P:0.01-0.06%, S:0.01-0.04%, surplus be Fe and inevitably trace element, the mass percent sum of above-mentioned each composition is 100%.
A kind of preparation method of refractory alloy, it is characterized in that: described preparation method comprises the steps: a, added in stove successively by the raw material of refractory alloy and melt, the raw material of described refractory alloy is high-carbon high-chromium steel, the pig iron, high carbon ferro-chrome, low carbon ferrochromium, molybdenum-iron, nickel and ferrosilicon; B, after raw material is all melting down, carry out first time deoxidation treatment, according to on-the-spot sample analysis result, in adjustment stove, chemical composition is until reach scale value; C, carry out second time deoxidation treatment and first time calm slagging-off; Second time calmness slagging-off is carried out, last thermometric tapping after d, intensification.
During use, each Ingredient percent contained by refractory alloy of the present invention is: Cr:33.0-35.0%, Mo:2.0-2.5%, Si:1.8-2.2%, C:1.0-1.4%, Mn:0.1-0.6.%, Ni:0.01-0.5%, P:0.01-0.06%, S:0.01-0.04%, surplus be Fe and inevitably trace element, under this kind of cast iron room temperature, tensile strength can reach σ b >=600MPa, material wear-resisting, resistance toheat is better, be applicable to work in high temperature environments, working temperature can reach 700-950 DEG C.Manufacturing cost is lower simultaneously, is easy to promotion and application.
Embodiment:
Below in conjunction with embodiment, the invention will be further described.
A kind of refractory alloy described in master of the present invention, refractory alloy described here refers to that alloy material can to work for a long time at the temperature more than 500 DEG C and can not deform, this kind of refractory alloy difference with the prior art is: described refractory alloy formula is as follows: the mass percent of each composition is: Cr:33.0-35.0%, Mo:2.0-2.5%, Si:1.8-2.2%, C:1.0-1.4%, Mn:0.1-0.6.%, Ni:0.01-0.5%, P:0.01-0.06%, S:0.01-0.04%, surplus be Fe and inevitably trace element, the mass percent sum of above-mentioned each composition is 100%.
Described refractory alloy formula is as follows: the mass percent of each composition is: Cr:34%, Mo:2.4%, Si:1.9%, C:1.2%, Mn:0.45.%, Ni:0.3%, P:0.05%, S:0.02%, surplus be Fe and inevitably trace element, the mass percent sum of above-mentioned each composition is 100%.
The raw material of described refractory alloy is high-carbon high-chromium steel, the pig iron, high carbon ferro-chrome, low carbon ferrochromium, molybdenum-iron, nickel and ferrosilicon.The raw material of described refractory alloy is mass percent: the nickel of the high carbon ferro-chrome of the high carbon and chromium iron of 35-42%, the pig iron of 10-13%, 12-20%, the low carbon ferrochromium of 22-30%, the ferrosilicon of 1.5-3%, the molybdenum-iron of 2-4% and 0.1-0.4%, the sum of above-mentioned each composition is 100%, and described high-carbon high-chromium steel adopts 9Cr18 steel.
A kind of preparation method of refractory alloy, its difference with the prior art is: described preparation method comprises the steps: a, added in stove successively by the raw material of refractory alloy and melt, and the raw material of described refractory alloy is high-carbon high-chromium steel, the pig iron, high carbon ferro-chrome, low carbon ferrochromium, molybdenum-iron, nickel and ferrosilicon; B, after raw material is all melting down, carry out first time deoxidation treatment, according to on-the-spot sample analysis result, in adjustment stove, chemical composition is until reach scale value; C, carry out second time deoxidation treatment and first time calm slagging-off; Second time calmness slagging-off is carried out, last thermometric tapping after d, intensification.
In a step, the nickel of the high carbon ferro-chrome of the high carbon and chromium iron of the raw material of refractory alloy to be mass percent be 35-42%, the pig iron of 10-13%, 12-20%, the low carbon ferrochromium of 22-30%, the ferrosilicon of 1.5-3%, the molybdenum-iron of 2-4% and 0.1-0.4%, the sum of above-mentioned each composition is 100%, and described high-carbon high-chromium steel adopts 9Cr18 steel; Adding of raw material is fashionable, first adds high carbon and chromium iron and the pig iron, then adds molybdenum-iron and nickel, and add high carbon ferro-chrome, low carbon ferrochromium and ferrosilicon after waiting above-mentioned raw materials to melt more than 90%, it is 1350-1400 degree that raw material adds fashionable in-furnace temperature; After high carbon and chromium iron and pig iron fusing 1/3, add slag making materials, slag making materials covers molten steel, described slag making materials add-on accounts for the 1%-1.5% of molten steel total amount, slag making materials is mixed by unslaked lime and fluorite 2:1, after above-mentioned high carbon and chromium iron and the pig iron melt substantially, add high carbon ferro-chrome and low carbon ferrochromium.
In b step, after raw material is all melting down, molten steel surface adds deslagging agent and covers, and adds reductor ferromanganese when in-furnace temperature reaches when 1550-1620 spends, ferromanganese add-on accounts for the 0.5%-1.0% of molten steel total amount, after 1-2 minute, add reductor ferrosilicon, the add-on of ferrosilicon accounts for the 0.5%-1.0% of molten steel total amount, then first time deoxidation is carried out, time is 1-2 minute, needs to cover molten steel surface with deslagging agent in deoxidation process, and after deoxidation, on-the-spot sample analysis is carried out in sampling.In step c, in molten steel, add the reductor calcium silicon accounting for molten steel total amount 0.1-0.15% carry out second time deoxidation, need in deoxidation process to cover molten steel surface, when molten steel heating is spent to 1640-1680 with deslagging agent, make the static 1-2 minute of molten steel, the scum silica frost on removing molten steel surface; B step and the deslagging agent described in step c are high temperature deslagging agent, and the consumption of deslagging agent accounts for the 3.5%-5% of molten steel total amount.
In Step d, molten steel temperature heats up when being down to 1550-1620, when molten steel heating is spent to 1640-1680, make the static 1-2 minute of molten steel, then remove the scum silica frost on molten steel surface at any time, until reach the tapping temperature of 1550-1610 degree, then remove scum silica frost and the deslagging agent on molten steel surface, keep the temperature of molten steel in the stove, and prepare tapping.
Embodiment 1
According to the chemical composition of Product Process yield rate and steel material, calculate the ratio (being undertaken by table 1) of foundry returns and steel material.(, at 50-60%, steel material is at 40-50% for general foundry returns.) alloy addition adjusts depending on concrete component requirements.Notice that furnace charge and alloy material must be dry, clean, inclusion-free and die casing material etc.
Table 1 composition proportion material table
First be energized to black furnace (stove model is: 100Kg-175Kw), the power of the supply 60% in 3-4 minute that starts to be energized, after rush of current is stable, increases to maximum value by power gradually.(hot stove: the time can shorten to 2-3 minute).Order of addition(of ingredients): first add forming steel material 9Cr18(40%) and the pig iron (11.46%), along with load melting, constantly should turn over furnace charge and decline, to prevent from building bridge.Residue furnace charge adds successively, until add in melting process.And under metal bath surface will remain on the covering of flux layer all the time.Not easily fusing and the less alloy material of scaling loss, as molybdenum-iron (3.5%), nickel (0.24%), can add at the fusing initial stage.If desired after load melting about 1/3, add slag making materials (unslaked lime: fluorite=2:1) slag making and cover molten steel, slag making materials add-on accounts for the 1%-1.5% of molten steel total amount.After molten steel has melted substantially, add ferrochrome.After furnace charge is all melting down, molten steel surface adds deslagging agent and covers.Reductor Mn iron (0.50%-1.0% of molten steel total amount) is added when temperature reaches about 1600 degree, add reductor Si iron (0.5%-1.0% of molten steel total amount) after about 1.5 minutes again, after deoxidation about 1.5 minutes, slag gets stokehold sample (deoxidation process deslagging agent covers).According to on-the-spot sample analysis result, adjustment chemical composition, until reaching in charger sheet till target value.The reductor calcium silicon adding 0.1-0.15% carries out deoxidation (noticing that whole deoxidation process will have deslagging agent to cover).When molten steel heating is to about 1650 degree, stop electric power making molten steel static about 1.5 minutes, bits float except removing dross, notice that whole process deslagging agent (Presico company high temperature deslagging agent, consumption accounts for the 3.5%-5.0% of molten steel total amount) covers.Then heat up.Liquid steel temperature is raised to about 1650 degree, stops electric power making molten steel static about 1.5 minutes, at any time except removing dross.Until tapping temperature, whole process deslagging agent covers.Measure after liquid steel temperature meets the requirements of tapping temperature, except the deslagging agent on removing dross and molten steel surface, electric furnace electric power is adjusted to 25-30%, to keep the temperature of molten steel in the stove, prepares tapping.Shaping refractory alloy of tapping has following mechanical property: tensile strength under room temperature: σ b >=600MPa; Hardness of cast form: HRC28-37; Heat-resisting, wear-resisting.Have following physicals density: 7.4Kg/dm3 fusing point 1380-1420 DEG C, can to work long hours in high temperature environments and indeformable, cost is lower simultaneously, adds up to 70,000 yuan per ton.
Embodiment 2
In order to the performance requriements worked under reaching turbo-supercharger high temperature, lining class foundry goods metallic substance changes to material of the present invention by D-5, adopts precision-investment casting shaping.In order to the metallic substance that obtained lining class uses, take following steps:
1) molding: adopt the mould manufactured in advance, compacting wax-pattern, process repairs a die, organize the operations such as tree, wax tree cleaning obtains with the clean wax tree with wax part.
2) shell processed: be coated with outside wax tree multiple layer refractory composition material will and Mo Laisha, make the formwork with some strength, through high-temperature steam dewaxing, obtain the formwork with the die cavity similar to blank shape.
3) proportioning: 9Cr18(40%), the pig iron (11.46%), molybdenum-iron (3.5%), nickel (0.24%), high carbon ferro-chrome (16%), low carbon ferrochromium (26.7%), ferrosilicon (2.1%).
4) melting technology: added in stove successively by the raw material of refractory alloy and melt, adding of raw material is fashionable, first adds high carbon and chromium iron and the pig iron, then adds molybdenum-iron and nickel, adds high carbon ferro-chrome, low carbon ferrochromium and ferrosilicon after waiting above-mentioned raw materials substantially to melt.After raw material is all melting down, molten steel surface adds deslagging agent and covers, reductor ferromanganese is added when in-furnace temperature reaches about 1600 degree, ferromanganese add-on accounts for the 0.5%-1.0% of molten steel total amount, after 1.5 minutes, add reductor ferrosilicon, the add-on of ferrosilicon accounts for the 0.5%-1.0% of molten steel total amount, then first time deoxidation is carried out, time is 1.5 minutes, need in deoxidation process to cover molten steel surface with deslagging agent, after deoxidation, sampling carries out on-the-spot sample analysis according to on-the-spot sample analysis result, and in adjustment stove, chemical composition is until reach scale value.Then in molten steel, add the reductor calcium silicon accounting for molten steel total amount 0.1-0.15% carry out second time deoxidation, need in deoxidation process to cover molten steel surface with deslagging agent, when molten steel heating to 1650 spends left and right, electric power is used to make molten steel static 1.5 minutes, the scum silica frost on removing molten steel surface, above-mentioned deslagging agent is high temperature deslagging agent, and the consumption of deslagging agent accounts for the 3.5%-5% of molten steel total amount.Heat up when molten steel temperature is down to 1600, when being spent by molten steel heating to 1650, make molten steel static 1.5 minutes, then remove the scum silica frost on molten steel surface at any time, until reach tapping temperature, then remove scum silica frost and the deslagging agent on molten steel surface, keep the temperature of molten steel in the stove, and prepare tapping.
5) casting: poured into by molten steel in formwork, obtains the precision casting of subsidiary dead head after cooling, through aftertreatments such as cutting, polishing, ball blast, sandblastings, obtain lining blank.This lining has following mechanical property: tensile strength under room temperature: σ b >=600MPa; Hardness of cast form: HRC28-37; Heat-resisting, wear-resisting.There is following physicals density: 7.4Kg/dm3 fusing point 1380-1420 DEG C, can to work long hours in high temperature environments and indeformable, provide cost savings simultaneously.
Claims (8)
1. a refractory alloy, it is characterized in that: described refractory alloy formula is as follows: the mass percent of each composition is: Cr:34%, Mo:2.4%, Si:1.9%, C:1.2%, Mn:0.45.%, Ni:0.3%, P:0.05%, S:0.02%, surplus be Fe and inevitably trace element, the mass percent sum of above-mentioned each composition is 100%.
2. a kind of refractory alloy according to claim 1, is characterized in that: the raw material of described refractory alloy is high-carbon high-chromium steel, the pig iron, high carbon ferro-chrome, low carbon ferrochromium, molybdenum-iron, nickel and ferrosilicon.
3. a kind of refractory alloy according to claim 2, it is characterized in that: to be mass percent be the raw material of described refractory alloy: the nickel of the high carbon ferro-chrome of the high-carbon high-chromium steel of 35-42%, the pig iron of 10-13%, 12-20%, the low carbon ferrochromium of 22-30%, the ferrosilicon of 1.5-3%, the molybdenum-iron of 2-4% and 0.1-0.4%, the sum of above-mentioned each composition is 100%, and described high-carbon high-chromium steel adopts 9Cr18 steel.
4. the preparation method of a refractory alloy, it is characterized in that: described preparation method comprises the steps: a, added in stove successively by the raw material of refractory alloy and melt, the raw material of described refractory alloy is high-carbon high-chromium steel, the pig iron, high carbon ferro-chrome, low carbon ferrochromium, molybdenum-iron, nickel and ferrosilicon; B, after raw material is all melting down, carry out first time deoxidation treatment, according to on-the-spot sample analysis result, in adjustment stove, chemical composition is until reach scale value; C, carry out second time deoxidation treatment and first time calm slagging-off; Second time calmness slagging-off is carried out, last thermometric tapping after d, intensification; In a step, described high-carbon high-chromium steel adopts 9Cr18 steel, the raw material of refractory alloy is mass percent is 9Cr1840%, the pig iron 11.46%, molybdenum-iron 3.5%, nickel 0.24%, high carbon ferro-chrome 16%, low carbon ferrochromium 26.7%, ferrosilicon 2.1%, and the sum stating each composition is 100%; Adding of raw material is fashionable, first adds high-carbon high-chromium steel and the pig iron, then adds molybdenum-iron and nickel, and add high carbon ferro-chrome, low carbon ferrochromium and ferrosilicon after waiting above-mentioned raw materials to melt more than 90%, it is 1350-1400 degree that raw material adds fashionable in-furnace temperature.
5. the preparation method of a kind of refractory alloy according to claim 4, it is characterized in that: after high-carbon high-chromium steel and pig iron fusing 1/3, add slag making materials, slag making materials covers molten steel, described slag making materials add-on accounts for the 1%-1.5% of molten steel total amount, slag making materials is mixed by unslaked lime and fluorite 2:1, after above-mentioned high-carbon high-chromium steel and the pig iron melt substantially, adds high carbon ferro-chrome and low carbon ferrochromium.
6. the preparation method of a kind of refractory alloy according to claim 4, it is characterized in that: in b step, after raw material is all melting down, molten steel surface adds deslagging agent and covers, reductor ferromanganese is added when in-furnace temperature reaches when 1550-1620 spends, ferromanganese add-on accounts for the 0.5%-1.0% of molten steel total amount, after 1-2 minute, add reductor ferrosilicon, the add-on of ferrosilicon accounts for the 0.5%-1.0% of molten steel total amount, then carries out first time deoxidation, and the time is 1-2 minute, need in deoxidation process to cover molten steel surface with deslagging agent, after deoxidation, on-the-spot sample analysis is carried out in sampling.
7. the preparation method of a kind of refractory alloy according to claim 6, it is characterized in that: in step c, in molten steel, add the reductor calcium silicon accounting for molten steel total amount 0.1-0.15% carry out second time deoxidation, need in deoxidation process to cover molten steel surface with deslagging agent, when molten steel heating is spent to 1640-1680, make the static 1-2 minute of molten steel, the scum silica frost on removing molten steel surface; B step and the deslagging agent described in step c are high temperature deslagging agent, and the consumption of deslagging agent accounts for the 3.5%-5% of molten steel total amount.
8. the preparation method of a kind of refractory alloy according to claim 4, it is characterized in that: in Step d, molten steel temperature heats up when being down to 1550-1620, when being spent to 1640-1680 by molten steel heating, make the static 1-2 minute of molten steel, then remove the scum silica frost on molten steel surface at any time, until reach the tapping temperature of 1550-1610 degree, then remove scum silica frost and the deslagging agent on molten steel surface, keep the temperature of molten steel in the stove, and prepare tapping.
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| JP3996989B2 (en) * | 1998-01-20 | 2007-10-24 | 中部電力株式会社 | Wear-resistant cast iron |
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| JP3939014B2 (en) * | 1998-03-27 | 2007-06-27 | 三菱自動車テクノメタル株式会社 | High strength cast iron |
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| JP3996989B2 (en) * | 1998-01-20 | 2007-10-24 | 中部電力株式会社 | Wear-resistant cast iron |
| CN1401810A (en) * | 2002-08-23 | 2003-03-12 | 广东广研新材料科技股份有限公司 | Abrasion-resistant iron and steel material |
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