CN103866073B - A kind ofly manufacture the forming mould of inoculant alloy ingot and the manufacture method of inoculant alloy ingot - Google Patents
A kind ofly manufacture the forming mould of inoculant alloy ingot and the manufacture method of inoculant alloy ingot Download PDFInfo
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- CN103866073B CN103866073B CN201410102978.9A CN201410102978A CN103866073B CN 103866073 B CN103866073 B CN 103866073B CN 201410102978 A CN201410102978 A CN 201410102978A CN 103866073 B CN103866073 B CN 103866073B
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 127
- 239000000956 alloy Substances 0.000 title claims abstract description 127
- 239000002054 inoculum Substances 0.000 title claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 229910002804 graphite Inorganic materials 0.000 claims description 14
- 239000010439 graphite Substances 0.000 claims description 14
- 230000007423 decrease Effects 0.000 claims description 4
- 239000007858 starting material Substances 0.000 claims description 3
- 238000005204 segregation Methods 0.000 abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 19
- 229910052742 iron Inorganic materials 0.000 description 10
- 238000001816 cooling Methods 0.000 description 6
- 229910052791 calcium Inorganic materials 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 229910001141 Ductile iron Inorganic materials 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 229910052702 rhenium Inorganic materials 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 238000005275 alloying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000714 At alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The present invention is a kind of manufactures the forming mould of inoculant alloy ingot and the manufacture method of inoculant alloy ingot, relate to the manufacturing process of inoculant alloy ingot, be specifically related to a kind of manufacture inoculant alloy ingot forming mould and utilize this forming mould to carry out the manufacture method of inoculant alloy ingot.A kind of forming mould manufacturing inoculant alloy ingot comprises the alloy mould that internal surface is spill, also comprise the die cap of convex appearance shape, its shape and alloy mould inner surface configuration match and its size is less than the corresponding size of alloy mould internal surface, the present invention makes inoculant alloy ingot by this forming mould, can effectively suppress inoculant alloy nodularization element oxide and component segregation.
Description
Technical field
The present invention relates to the manufacturing process of inoculant alloy ingot, be specifically related to a kind of manufacture inoculant alloy ingot forming mould and utilize this forming mould to carry out the manufacture method of inoculant alloy ingot.
Background technology
In the production of spheroidal graphite cast iron, the nodulizing agent containing spheroidization of graphite elements such as Mg, Ca, Re is added in molten iron, the graphite in molten iron is made to become spherical thus obtain spheroidal graphite cast iron, in the manufacturing processed of this spheroidal graphite cast iron, method or sandwich are poured in usual employing, the nodulizing agent of the suitable particle size of solid is put into bottom hot metal ladle, reinject molten iron, these nodulizing agents and molten iron carry out fusing reaction, nodularization element in nodulizing agent makes the graphite shape in molten iron that spherical transformation occur, and forms globular graphite.
In production process traditional at present, the alloy water of nodulizing agent is injected in the molding concave die of mould, forms the alloy pond of set depth, then at leisure naturally cooling, solidify, form nodulizing agent tabular alloy pig.But under the open state of air, inoculant alloy water surface exposes in an atmosphere for a long time, the spheroidization of graphite elements such as Mg, Re in inoculant alloy water, with the oxygen generation oxidizing reaction in air, form oxide compound; The content being conducive to the element of spheroidization of graphite is due to oxidized and reduce.Therefore, the usage quantity of nodulizing agent must strengthen.Meanwhile, when air cooling, the alloy water condensation time is long, and the nodularization element generation macrosegregation of the interpolation in molten iron, causes disadvantageous effect to nodulizing agent quality, finally cause spheroidal graphite cast iron production cost to raise.
Another kind of traditional inoculant alloy ingot shaping, cover plate will be placed on the opening portion in the molding concave die of alloy mould, and such cover plate needs a sprue gate, the alloy water of defined amount is injected into cooling in female, solidifies thus form alloy pig, but the problem of oxidation of spheroidization of graphite element can not be solved completely, such alloyed oxide content is high, tissue looseness, as shown in Figure 7, component segregation, cause nodulizing agent usage quantity to strengthen, cost increases.
Summary of the invention
The present invention aims to provide a kind of forming mould manufacturing inoculant alloy ingot, and utilizes this forming mould to manufacture a kind of method that effectively can suppress the inoculant alloy ingot of inoculant alloy nodularization element oxide, component segregation.
Manufacture a forming mould for inoculant alloy ingot, comprise the alloy mould that internal surface is spill; Forming mould also comprises the die cap of convex appearance shape, and its shape and alloy mould inner surface configuration match and its size is less than the corresponding size of alloy mould internal surface.
Preferably, the spill of alloy mould internal surface is hollow hemisphere shape, rectangular-shaped or ellipsoid shape.
More preferably, alloy mould overlaps with the central shaft of die cap.
A manufacture method for inoculant alloy ingot, employs the forming mould of inoculant alloy ingot as above.
Preferably, manufacturing step is:
(1) the nodulizing agent starting material containing spheroidization of graphite element are dissolved, form inoculant alloy water;
(2) inoculant alloy water is injected alloy mould internal surface, form the alloy pond of set depth;
(3) decline die cap, extrude with the inoculant alloy water surface in this alloy mould internal surface, inoculant alloy water is upwards expanded along the gap between this alloy mould internal surface and die cap and solidifies, and forms tabular inoculant alloy ingot.
In the present invention, because die cap declines, the inoculant alloy water surface is extruded, thus between alloy mould internal surface and die cap, inoculant alloy water is extruded expansion, the depth shallower in the alloy pond of injection.Because die cap has chilling action again, accelerate the speed of cooling of alloy water.Therefore, it is possible to obtain fine and close alloy structure, as shown in Figure 8, advantageously suppress and prevent the segregation of nodulizing agent added ingredients, the inoculant alloy ingot realizing quality homogenization is produced.
On the other hand, the alloy water surface be extruded contacts with die cap, thus the contact of barrier and air, restrained effectively the oxidation of alloy water, thus significantly reduce the content of the oxide compound in nodulizing agent, therefore, the addition of such nodulizing agent in molten iron can reduce effectively.
Accompanying drawing explanation
Fig. 1 is the die cap schematic cross-section of alloy mould.
Fig. 2 is the alloy mode cross section schematic diagram after injecting quantitative alloy water.
Fig. 3 be in alloy mould alloy water when die cap presses down along the view expanded between alloy mould internal surface and die cap.
Fig. 4 adopts rectangular-shaped alloy mould, the schematic cross-section of its die cap.
Fig. 5 is the rectangular-shaped alloy mode cross section schematic diagram after injecting quantitative alloy water.
Fig. 6 be in rectangular-shaped alloy mould alloy water when die cap presses down along the view expanded between alloy mould internal surface and die cap.
Fig. 7 is the metallographic structure figure that inoculant alloy ingot that traditional method obtains obtains under an electron microscope.
Fig. 8 is the inoculant alloy ingot metallographic structure figure under an electron microscope utilizing the present invention to obtain.
Wherein, 1-alloy mould, 2-die cap, 3-reams, 4-suspension hook.
Embodiment
Embodiment one:
A kind of forming mould manufacturing inoculant alloy ingot, comprise the alloy mould 1 that internal surface is spill, forming mould also comprises the die cap 2 of convex appearance shape, its shape and alloy mould 1 shape internal surface match and its size is less than the corresponding size of alloy mould 1 internal surface, and alloy mould overlaps with the central shaft of die cap.In the present embodiment, alloy mould 1 internal surface and die cap 2 are hemispherical for what mutually mate, and as shown in Figure 1 and Figure 2, die cap 2 center of top is provided with a fraising 3, by reaming on 3 suspension hooks be suspended to 4, die cap 2 can be moved up and down.While moving down die cap 2, mechanical pressurization and extruding can be carried out to die cap 2.
Embodiment two:
Manufacture a forming mould for inoculant alloy ingot, comprise the alloy mould 1 that internal surface is spill; Forming mould also comprises the die cap 2 of convex appearance shape, and its shape and alloy mould 1 inner surface configuration match and its size is less than the corresponding size of alloy mould 1 internal surface, and alloy mould overlaps with the central shaft of die cap.In the present embodiment, alloy mould 1 internal surface and die cap 2 are rectangular-shaped for what mutually mate, and as shown in Figure 4, Figure 5, die cap 2 center of top is provided with one and reams 3,3 be suspended on suspension hook 4, die cap 2 can be moved up and down by reaming.While moving down die cap 2, mechanical pressurization and extruding can be carried out to die cap 2.
Embodiment three:
A manufacture method for inoculant alloy ingot, the steps include:
(1) by starting material: ferrosilicon, MAGNESIUM METAL, rare earth metal, silico-calcium, and steel scrap (Fe) electric furnace acceleration melting obtains 0.2-3.0 ton inoculant alloy water;
(2) injecting alloy mould 1 by melting the inoculant alloy water obtained, forming the alloy pond of set depth;
(3) put down by the die cap 2 sling, extruding inoculant alloy water, adds the deadweight of upper mould cover 2, and simultaneously to die cap 2 mechanical pressurization and extruding, die cap 2 continues to decline, and makes inoculant alloy water be extruded expansion, the degree of depth of inoculant alloy water is reduced.Meanwhile, die cap 2 makes inoculant alloy water quick cooling, solidifies.Obtain the solid ball agent alloy pig of bowl-type or pot type.
Wherein, die cap 2 is made up of the material that the thermal conductivity such as cast iron, Heat resisting cast steel, copper material are good, and alloy mould 1 selects other refractory materialss such as SiC, graphite, heat resisting brick, or the matrix material of refractory materials and cast iron.In die cap 2 decline process, on the one hand die cap 2 has cooling effect, makes inoculant alloy water cooled and solidified rapidly, reduces alloy element component segregation, thus makes the good and nodulizing agent of uniform component of compactness.On the other hand, die cap 2 extrudes, alloy water and atmosphere time shorten, and die cap 2 is air exclusion, effectively prevent Mg, Ca, the oxidation of the spheroidization of graphite element that the oxygen easily in air such as Re is combined, thus avoid the loss of spheroidization of graphite element, the usage quantity of the nodulizing agent needed for the spheroidization of graphite in cast iron water is reduced.Simultaneously, small amounts thing adrift on the alloy water surface in alloy pond, these floating oxide compounds move on the gap between alloy mould 1 internal surface and die cap 2, define the outer part of inoculant alloy water, finally define the spilling part of inoculant alloy water at alloy mould 1 oral area and easily remove, as shown in Figure 3 and Figure 6.In addition, discharge after the gas that inoculant alloy water contains is extruded, the oxide compound be therefore brought into and gas seldom, can obtain the inoculant alloy ingot of more high-quality.
The inoculant alloy ingot made by aforesaid method, usual thickness is about 30mm, even can obtain the thickness of below 20mm, and consider and practical viewpoint from the manufacturability of alloy pig manufacture, thickness should control at more than 5mm.
The nodulizing agent obtained is carried out graphite treatment when molten iron temperature 1480 degree, in order to reach setting nodularization effect, the nodulizing agent obtained in order to front method needs the adding rate of adding nodulizing agent to be 1.20%, the nodulizing agent adopting the present invention to obtain needs the adding rate science and technology of adding nodulizing agent to be reduced to 1.00%, and usage quantity reduces by 20%.
The inoculant alloy ingot utilizing conventional art to produce is through air setting, and coarse grains, it is unclear to solidify direction, and alloying element generation segregation is serious, and section density is low.As shown in Figure 7.Its alloying constituent is: Si:44.6%, Mg:5.25%, Re:2.1%, Ca:1.65%, Al:0.53%, Fe surplus.Its content of magnesia is greater than 0.8%.The inoculant alloy ingot utilizing the inventive method to make, crystal grain is tiny, and it is clear, finer and close to solidify direction, and segregation value is smaller, as shown in Figure 8.Its alloying constituent is: Si:44.13%, Mg:5.21%, Re:2.07%, Ca:1.58%, Al:0.54%, Fe surplus, and its content of magnesia is being less than 0.5%.
In specific implementation process, alloy mould 1 internal surface that the forming mould of obtained inoculant alloy ingot can describe as embodiment one is hollow hemisphere shape, also can be rectangular-shaped as described in embodiment two, or be ellipsoid shape, only need the mating shapes of alloy mould 1 internal surface and die cap 2.
Claims (2)
1. the manufacture method of an inoculant alloy ingot, it is characterized in that: in the method, use following forming mould, this forming mould comprises the rectangular-shaped alloy mould (1) that internal surface is spill, also comprise the die cap (2) of convex appearance shape, its shape and alloy mould (1) inner surface configuration match and its size is less than the internal surface corresponding size of alloy mould (1), and alloy mould (1) overlaps with the central shaft of die cap (2).
2. the manufacture method of inoculant alloy ingot as claimed in claim 1, is characterized in that: manufacturing step is:
(1) the nodulizing agent starting material containing spheroidization of graphite element are dissolved, form inoculant alloy water;
(2) inoculant alloy water is injected alloy mould (1) internal surface, form the alloy pond of set depth;
(3) decline die cap (2), extrudes with the inoculant alloy water surface in this alloy mould (1), and inoculant alloy water is upwards expanded along the gap between this alloy mould (1) internal surface and die cap (2) and solidifies, and forms tabular inoculant alloy ingot.
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| CN201410102978.9A CN103866073B (en) | 2014-03-20 | 2014-03-20 | A kind ofly manufacture the forming mould of inoculant alloy ingot and the manufacture method of inoculant alloy ingot |
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| CN201410102978.9A CN103866073B (en) | 2014-03-20 | 2014-03-20 | A kind ofly manufacture the forming mould of inoculant alloy ingot and the manufacture method of inoculant alloy ingot |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1060927A (en) * | 1990-10-15 | 1992-05-06 | 胡奎生 | A kind of forming method of surfacial aerial reflecting curved surface |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060927A (en) * | 1990-10-15 | 1992-05-06 | 胡奎生 | A kind of forming method of surfacial aerial reflecting curved surface |
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