CN1207971A - Composite casting technology to alloy casting partially - Google Patents
Composite casting technology to alloy casting partially Download PDFInfo
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- CN1207971A CN1207971A CN 97107071 CN97107071A CN1207971A CN 1207971 A CN1207971 A CN 1207971A CN 97107071 CN97107071 CN 97107071 CN 97107071 A CN97107071 A CN 97107071A CN 1207971 A CN1207971 A CN 1207971A
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- 238000005266 casting Methods 0.000 title claims abstract description 69
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- 238000005275 alloying Methods 0.000 claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 34
- 239000000203 mixture Substances 0.000 claims description 65
- 229910052751 metal Inorganic materials 0.000 claims description 41
- 239000002184 metal Substances 0.000 claims description 41
- 229910052782 aluminium Inorganic materials 0.000 claims description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 21
- 239000004411 aluminium Substances 0.000 claims description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 20
- 239000011159 matrix material Substances 0.000 claims description 19
- 229910052749 magnesium Inorganic materials 0.000 claims description 13
- 239000011777 magnesium Substances 0.000 claims description 13
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 230000000630 rising effect Effects 0.000 claims description 10
- 239000006260 foam Substances 0.000 claims description 8
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 4
- 239000005864 Sulphur Substances 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 235000010344 sodium nitrate Nutrition 0.000 claims description 4
- 239000004317 sodium nitrate Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 abstract description 2
- 239000004033 plastic Substances 0.000 abstract description 2
- 238000007711 solidification Methods 0.000 abstract description 2
- 230000008023 solidification Effects 0.000 abstract description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 9
- 239000011651 chromium Substances 0.000 description 7
- 229910052804 chromium Inorganic materials 0.000 description 6
- 239000012634 fragment Substances 0.000 description 6
- 238000010114 lost-foam casting Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 229910000632 Alusil Inorganic materials 0.000 description 4
- 229910000604 Ferrochrome Inorganic materials 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 108010038629 Molybdoferredoxin Proteins 0.000 description 3
- HBELESVMOSDEOV-UHFFFAOYSA-N [Fe].[Mo] Chemical compound [Fe].[Mo] HBELESVMOSDEOV-UHFFFAOYSA-N 0.000 description 3
- 238000002309 gasification Methods 0.000 description 3
- 238000011081 inoculation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
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- 239000004576 sand Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000001476 alcoholic effect Effects 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010067484 Adverse reaction Diseases 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
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- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- QENHCSSJTJWZAL-UHFFFAOYSA-N magnesium sulfide Chemical compound [Mg+2].[S-2] QENHCSSJTJWZAL-UHFFFAOYSA-N 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
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- 238000011017 operating method Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
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- 238000011084 recovery Methods 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Mold Materials And Core Materials (AREA)
Abstract
The present invention proposes "in-mold alloying" method, that is, alloy block (intermediate alloy block or exothermic alloy block) is first placed into mold and the casting, which has different component and thus performance in some surface or special local parts, is then cast. During casting, the alloy block may be held with foamed plastic in certain position inside the mold, or may be placed arbitrarily inside the mold for first casting with the secondary casting being performed after surface solidification of the first casting from the bottom of the casting mold. The exothermic alloy block used contains intermediate alloy and exothermic agent.
Description
The present invention relates to composite casting technique, the composite casting technique that especially utilizes lost-foam casting method or second pouring method to be carried out.
At present, when some top layers such as production roll, bearing or corrosion-resistant pump case require different parts with substrate performance, needs adopt the method for centrifugal composite casting could obtain satisfied effect and (promptly pour into a mould the top layer metal earlier on centrifugal casting machine, and then the cast parent metal), take to carry out in common casting process or after the cast molding surface-treated method then performance often do not reach requirement.But cost costliness of centrifugal composite casting (need the metal of melting two stove heterogeneities, the price of equipment is also very high at every turn) and operating procedure complexity can not be used for the part or the asymmetrical part of axle class of non-axle class.In addition, require different parts then still not have feasible casting method for some special part and substrate performance.
Thereby the objective of the invention is to propose a kind ofly can carry out local alloying to foundry goods and make foundry goods top layer or some special part different with substrate performance, and cost is lower, the composite casting method of easy operating.
Solution of the present invention is as follows:
In casting mold desired location place clamping alloy block foam mould and on casting mold top exhaust duct is set, in casting mold, fill with the motlten metal of matrix composition.
In casting mold, place alloy block, running gate system adopts bottom filling, in casting mold, fill with the motlten metal of matrix composition, wait to reach form the setting time that required skin depth will use after, in casting mold, continue again to pour into a mould the motlten metal of matrix composition up to filling with its secondary consumption.
On the basis of such scheme, used alloy block is the heating alloy block that contains intermediate alloy and exothermic mixture, the consumption of intermediate alloy is according to the calculating such as absorptivity of the alloying element content of required adjustment composition and the alloying element content in the intermediate alloy, alloying element, and the consumption of exothermic mixture is according to area size, the temperature height of required rising temperature and the calculating such as heat that exothermic reaction produced thereof.
Used exothermic mixture is made up of aluminium, tri-iron tetroxide and magnesium.
Used exothermic mixture is made up of aluminium, ferrosilicon and sodium nitrate.
Used exothermic mixture is made up of aluminium, silica and magnesium.
Used exothermic mixture is made up of sulphur and magnesium.
Key of the present invention has been to propose the notion of " alloying in the type ", promptly carries out Alloying Treatment in casting process in casting mold, so that foundry goods top layer or some special part obtain different alloying components with matrix, thereby makes it to realize different performances." type in alloying " by in casting mold, place alloy block (intermediate alloy piece or heating alloy block) then cast molding realize.
Intermediate alloy is ferrochrome, molybdenum-iron, beryllium copper, almag etc., the composition of required adjustment during by alloying and determining; Consumption is according to the calculating such as absorptivity of the alloying element content of required adjustment composition and the alloying element content in the intermediate alloy, alloying element, that is:
Wherein, P is the consumption of intermediate alloy, V
1For needing the volume in alloying zone in the foundry goods,, ρ
mBe the density of liquid parent metal, η
1Be the alloying element content (content all is weight percentage, down together) of required adjustment composition, η
2Be the alloying element content in the intermediate alloy, λ be alloying element absorptivity (since alloying be in casting mold, carry out, action time is short, so the burn out rate of alloying element is extremely low, and the absorptivity of alloying element can be reached more than 95%).But, because the fusing point of intermediate alloy is often higher, therefore, just in smelting furnace or casting ladle, used (promptly when temperature of melt metal is higher than the fusing point of intermediate alloy, using) to adjust the composition of foundry goods in the past, but this method can only make whole stove or whole bag metal components all change, and can not realize local alloying, and the scaling loss of alloying element is also very serious.The present invention takes directly to put into the method for type for the lower intermediate alloy of some fusing point, then adopt the heating alloy block that the local temperature of placing alloy block in the casting process in the casting mold is raise greatly for the higher intermediate alloy of fusing point, meet or exceed the fusing point of intermediate alloy, dystectic intermediate alloy is melted.Contain intermediate alloy and exothermic mixture in the heating alloy block.The kind of intermediate alloy and consumption are identical when directly putting into.Exothermic mixture is by forming with the material that matrix generation exothermic reaction and reactant are eliminated easily, as: the exothermic mixture of Ferrous Castings is formed (reaction generates iron and aluminium oxide slag) by aluminium, tri-iron tetroxide and magnesium, or forms (reaction generates silicon, iron and aluminium oxide slag) by aluminium, ferrosilicon and sodium nitrate: the exothermic mixture of aluminium base foundry goods is formed (reaction generates silicon and aluminium oxide slag) by aluminium, silica and magnesium; The exothermic mixture of copper base foundry goods is formed (reaction generates the magnesium sulfide slag) by sulphur and magnesium, or the like.Exothermic mixture is lighted under the high temperature action of motlten metal, produces violent exothermic reaction, emits a large amount of heats, and the local temperature of motlten metal is improved greatly.The consumption of exothermic mixture raises area size, the temperature height of temperature and heat that exothermic reaction produced as required and determines:
Wherein, M is the consumption of exothermic mixture, C
mBe the specific heat capacity of parent metal, T
2Be the temperature after raising, T
1Be the temperature before raising, V
mBe the volume of required rising temperature province, ρ
mBe the density of liquid parent metal, the reaction heat that Δ H produces when parent metal is poured into a mould for the Unit Weight exothermic mixture that draws according to chemical equation.With the fragment of intermediate alloy (generally get particle diameter and be 1～10mm) and the powder (generally getting granularity 〉=100 orders) of exothermic mixture mix and stir after solidify to handle and form.Solidifying when handling can be to add binding agent to stir, and (as: copper base exothermic mixture can be handled like this to carry out spontaneous curing then at normal temperatures.Because the exothermic mixture of sulfur-bearing can not compacting) or under the low pressure below the 10MPa, be cured, binding agent is generally organic matter, as: 3% polyvinyl butyral resin alcoholic solution, adverse reaction (promptly can not generate be difficult for get rid of impurity or pernicious gas) can not take place in it and matrix and intermediate alloy, exothermic mixture etc., and what determine (both consumption sums of≤5%) to its consumption according to the consumption of intermediate alloy and exothermic mixture; Perhaps also adding additives and become piece with the above high pressure compression of 15MPa at normal temperatures not.
Utilize lost-foam casting method, intermediate alloy piece or the heating alloy block made be ground into behind the fragment that particle diameter is 1～10mm give clamping by foam mould (foam mould will adopt that gas forming amount is little, the few material of gasification back residue, methyl methacrylate as 70% and 30% styrene copolymerized resin, density must be less than 0.015g/cm
3The coating of will be on the surface brush of foam mould when sand casting using during lost foam casting), be fixed on the position that needs local alloying with wires similar such as iron wire, copper wire, aluminium wires then with parent metal, and required exhaust duct when on casting mold top the foam mould gasification being set.After the motlten metal of matrix composition pours into casting mold, foam mould is generating gasification under the high temperature action of motlten metal, gas is discharged by the set exhaust duct in casting mold top, intermediate alloy piece or heating alloy block are with after motlten metal contacts, the intermediate alloy piece is directly melted, or the exothermic mixture in the heating alloy block produces exothermic reaction under the motlten metal effect, thereby intermediate alloy is melted, required alloying element incorporates in the parent metal, make local composition become required special composition (promptly having realized local alloying), and main matrix composition still constant (because the diffusion velocity of alloying element is significantly less than the setting rate of motlten metal).Because the zone of local alloying is to solidify with Base Metal and in same casting mold with the zone of alloying not, and alloying element has certain diffusion velocity and scope in motlten metal, therefore have good transitional region between the matrix of the position of local alloying and alloying not and do not have tangible interface, yet the combination that makes both is from tight.This method to the foundry goods shape without limits, non-axle class, that the axle class is asymmetrical or complex-shaped is all passable; To the position of the local alloying of needs also without limits, all can in top layer or some special part of foundry goods; Casting mold is not had special requirement yet, and sand mold, gypsum mould, ceramic mould, metal mold etc. all can be used; Selection, exhaust measure and coating process etc. to selection, pouring temperature and the poring rate of the design of running gate system, pouring position are all undertaken by lost-foam casting method.
For some casting molds (as metal mold) faster or taked control to solidify the casting mold of order measure of dispelling the heat, also alloy block optionally can be placed in the casting mold and need not be fixed on certain location (being good to be placed on the cast gate place certainly), running gate system adopts bottom filling.After the motlten metal of matrix composition injects casting mold, the intermediate alloy piece is melted or react and intermediate alloy is melted, thereby the molten metals in the casting mold is changed, obtain needed special composition with exothermic mixture in the heating alloy block.At this moment lower or solidify order because of the original temperature of casting mold because of having controlled, motlten metal near the casting mold inner surface solidifies earlier very soon, that is the foundry goods top layer forms earlier, waiting to reach the setting time that forms required skin depth and will use (can calculate divided by setting rate according to required skin depth and draw, perhaps according to heat transfer mathematical model finite difference calculus analog temperature field distribution situation, determine the time of freezing interface) after, again the motlten metal of matrix composition is continued to inject casting mold (densitometer that required motlten metal secondary consumption can multiply by liquid metals according to the regional volume of ot-yet-hardened is calculated) from the cast gate of casting mold bottom, this moment, the motlten metal of matrix composition squeezed away the special composition motlten metal of ot-yet-hardened in the casting mold with regard to rising gradually from the rising head on casting mold top, was replaced by the motlten metal of matrix composition fully up to the special composition motlten metal of foundry goods heart portion.Because the relative top layer of process of setting of foundry goods heart portion is a process more slowly, this second pouring can be realized fully.Adopt the second pouring method, make foundry goods heart portion (being matrix) become two kinds of different compositions, thereby obtain different performances with the top layer; And, because the metal of two kinds of compositions is the processes (being to replace while solidifying) of progressively replacing, therefore has good transitional region equally between the two and do not have tangible interface, yet the combination that makes both is from closely.This method but can only be used for the foundry goods that the top layer needs local alloying to the foundry goods shape without limits; The required exhaust duct of lost-foam casting method need be set on the casting mold, but the motlten metal that the setting of rising head will help pouring into a mould is for the first time discharged smoothly and (can be adopted the cylindrical rising head in top, and the rising head neck should be thick), cast gate can adopt forms such as the gate stick of straight cutting casting mold bottom or bottom filling ingate.The selection equivalent metal mold casting method of pouring temperature and poring rate.
In sum, alloying process and in conjunction with the method for lost-foam casting method or second pouring in the employing type of the present invention, only need the metal of a kind of composition of melting to carry out cast molding and can realize local alloying, make foundry goods top layer or some special part have the composition different and performance with matrix and have good transitional region each other, in conjunction with closely.Do not need expensive special Casting Equipment, operational process of craft is also grasped easily.The making of heating alloy block is also convenient feasible.Utilize the present invention can make various with the base bimetallics or many metal castings (as high-chromium abrasion-proof cast iron and casting pig or spheroidal graphite cast-iron, alusil alloy and fine aluminium, beryllium-bronze and fine copper, or the like), and can carry out alloying identical component or heterogeneity simultaneously at the different parts on the same foundry goods.
Embodiment:
(1) production process of high-chromium abrasion-proof cast iron and spheroidal graphite roll: roll body is of a size of Φ 400 * 1000mm, the top layer is high-chromium abrasion-proof cast iron (15Cr3Mo), chromium content is 15%, molybdenum content is 3%, high chromium layer thickness is 60mm, matrix is a spheroidal graphite cast-iron, the trade mark is QT500-5, adopt the interior alloying of method realization type of second pouring, casting mold is a metal mold, and cast gate adopts the gate stick of straight cutting casting mold bottom, and rising head is cylindrical, place roll crown center position, because of the fusing point of intermediate alloy ferrochrome is higher than pouring temperature, so adopt the heating alloy block, the consumption that can get ferrochrome (Cr 60%) according to formula (1) is 130Kg, the consumption of molybdenum-iron (Mo 70%) is 22.5Kg, the prescription of exothermic mixture is: 23% aluminium, 75% tri-iron tetroxide, 2% magnesium all adopts chemical pure powder, and the consumption of exothermic mixture is calculated as 80Kg according to formula (2), binding agent adopts 3% polyvinyl butyral resin alcoholic solution, and its consumption is 4Kg.With ferrochrome, molybdenum-iron is all pulverized the fragment into particle diameter 1～5mm size, mix back adding binding agent stirs with exothermic mixture, after the 10MPa that pressurizes at normal temperatures then solidifies, pulverize again and be the fragment of particle diameter 1～10mm, be deposited in the gate stick porch in the casting mold, the base iron of melting one stove QT500-5 (promptly handling) without spheroidization and inoculation, when being 1450 ℃, temperature carries out the cast first time, fill with the back and wait for that a segment table layer setting time is (according to calculating, reaching the required setting time of the thick solidification layer of 60mm is 1 minute), can carry out spheroidization and inoculation to the molten iron in the casting ladle this moment handles, and then will carry out the cast second time (pouring temperature is 1320 ℃) through the molten iron that spheroidization and inoculation is handled, the secondary consumption of molten iron is that the volume of whole roll deducts the density that multiply by molten iron behind the top layer volume that needs alloying again, and calculating can be 500Kg.The high chromium hot melt of discharging from rising head can be used as waste recovery.The foundry goods top layer 60～62mm that obtains is the white structure of Gao Ge, and heart portion is the magnesium iron tissue, surface size precision height.
(2) production process of alusil alloy and fine aluminium piston: piston size is Φ 50 * 40mm, it is the alusil alloy of ZL109 that top layer 10mm intends adopting the trade mark, heart portion adopts pure aluminum material, utilize alloying in the disappearance mould progressive type, because the fusing point of intermediate alloy all is lower than pouring temperature, so directly adopt intermediate alloy, according to calculating the consumption AlSi20 that can get each intermediate alloy is 82g, AlCu50 is 2.7g, AlMg50 is 2.7g, with each intermediate alloy pulverize be the fragment of 1～2mm and mix after, the even clamping of foam mould that methyl methacrylate with 70% and 30% styrene copolymerized resin are made is also fixed with the fine aluminium silk screen, (the plastics mould is a circular ring type to place sand mold, encircle thick 10mm, long 40mm can directly insert the intermediate alloy fragment when foaming), the top of sand mold is provided with exhaust duct and running gate system, be that Design of Runner System is an open teeming system, unite two into one with exhaust duct.Melted fine aluminium liquid is poured into a mould at 720～740 ℃, and the piston foundry goods top layer that obtains is the alusil alloy (Si 11.5～13.1%, and Cu 0.7～0.9%, and Mg 0.6～0.9%) of ZL109, and thickness is at 10～12mm, and heart portion is a fine aluminium.
(3) several prescriptions of other of exothermic mixture:
(a) exothermic mixture of Ferrous Castings can also be: 25% aluminium, 70% ferrosilicon (Si 75%), 5% sodium nitrate.
(b) exothermic mixture of aluminium base foundry goods can be: 36% aluminium, 60% silica, 4% magnesium.
(c) exothermic mixture of copper base foundry goods can be 45% sulphur, 55% magnesium.
Claims (7)
1. one kind is carried out the composite casting technique of local alloying to foundry goods, it is characterized in that in casting mold desired location place clamping alloy block foam mould and on casting mold top exhaust duct is set, in casting mold, fill with the motlten metal of matrix composition.
2. composite casting technique that foundry goods is carried out local alloying, it is characterized in that in casting mold, placing alloy block, running gate system adopts bottom filling, in casting mold, fill with the motlten metal of matrix composition, wait to reach form the setting time that required skin depth will use after, in casting mold, continue again to pour into a mould the motlten metal of matrix composition up to filling with its secondary consumption.
3. the composite casting technique that foundry goods is carried out local alloying as claimed in claim 1 or 2, it is characterized in that used alloy block is the heating alloy block that contains intermediate alloy and exothermic mixture, the consumption of intermediate alloy is according to the calculating such as absorptivity of the alloying element content of required adjustment composition and the alloying element content in the intermediate alloy, alloying element, and the consumption of exothermic mixture is according to area size, the temperature height of required rising temperature and the calculating such as heat that exothermic reaction produced thereof.
4. as claimed in claim 3 foundry goods is carried out the composite casting technique of local alloying, it is characterized in that used exothermic mixture is made up of aluminium, tri-iron tetroxide and magnesium.
5. as claimed in claim 3 foundry goods is carried out the composite casting technique of local alloying, it is characterized in that used exothermic mixture is made up of aluminium, ferrosilicon and sodium nitrate.
6. as claimed in claim 3 foundry goods is carried out the composite casting technique of local alloying, it is characterized in that used exothermic mixture is made up of aluminium, silica and magnesium.
7. as claimed in claim 3 foundry goods is carried out the composite casting technique of local alloying, it is characterized in that used exothermic mixture is made up of sulphur and magnesium.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97107071 CN1207971A (en) | 1997-08-12 | 1997-08-12 | Composite casting technology to alloy casting partially |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97107071 CN1207971A (en) | 1997-08-12 | 1997-08-12 | Composite casting technology to alloy casting partially |
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| CN1207971A true CN1207971A (en) | 1999-02-17 |
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| CN100370050C (en) * | 2006-04-30 | 2008-02-20 | 郑州航空工业管理学院 | Guide and guard roller for guiding steel billet in high speed wire rolling machine and its making process |
| CN104588436A (en) * | 2014-12-24 | 2015-05-06 | 天津理工大学 | Method for preparing composite pipe by expanding secondary pouring dual-metal pipe billets |
| CN106513637A (en) * | 2016-10-19 | 2017-03-22 | 昆明理工大学 | Preparing method of foamed aluminum sandwich plate |
| CN108607956A (en) * | 2018-04-13 | 2018-10-02 | 芜湖久弘重工股份有限公司 | A kind of lost foam casting realizes the preparation method of lathe casting part alloying |
| CN110893453A (en) * | 2019-12-02 | 2020-03-20 | 中北大学 | Gypsum mold precision casting method and device for magnesium alloy casting |
| CN112008057A (en) * | 2020-09-01 | 2020-12-01 | 上海润成机电科技有限公司 | Bimetal sliding bearing |
| CN113182505A (en) * | 2021-04-26 | 2021-07-30 | 中国兵器工业第五九研究所 | Multi-region alloying strengthening preparation method of aluminum alloy casting |
| CN113199010A (en) * | 2021-04-26 | 2021-08-03 | 中国兵器工业第五九研究所 | Method for alloying magnesium element on surface layer of aluminum alloy casting |
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1997
- 1997-08-12 CN CN 97107071 patent/CN1207971A/en active Pending
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| CN100370050C (en) * | 2006-04-30 | 2008-02-20 | 郑州航空工业管理学院 | Guide and guard roller for guiding steel billet in high speed wire rolling machine and its making process |
| CN104588436A (en) * | 2014-12-24 | 2015-05-06 | 天津理工大学 | Method for preparing composite pipe by expanding secondary pouring dual-metal pipe billets |
| CN106513637A (en) * | 2016-10-19 | 2017-03-22 | 昆明理工大学 | Preparing method of foamed aluminum sandwich plate |
| CN106513637B (en) * | 2016-10-19 | 2019-06-11 | 昆明理工大学 | A kind of preparation method of aluminium foam sandwich plate |
| CN108607956A (en) * | 2018-04-13 | 2018-10-02 | 芜湖久弘重工股份有限公司 | A kind of lost foam casting realizes the preparation method of lathe casting part alloying |
| CN110893453A (en) * | 2019-12-02 | 2020-03-20 | 中北大学 | Gypsum mold precision casting method and device for magnesium alloy casting |
| CN110893453B (en) * | 2019-12-02 | 2024-02-27 | 中北大学 | Gypsum type precision casting method and device for magnesium alloy castings |
| CN112008057A (en) * | 2020-09-01 | 2020-12-01 | 上海润成机电科技有限公司 | Bimetal sliding bearing |
| CN113182505A (en) * | 2021-04-26 | 2021-07-30 | 中国兵器工业第五九研究所 | Multi-region alloying strengthening preparation method of aluminum alloy casting |
| CN113199010A (en) * | 2021-04-26 | 2021-08-03 | 中国兵器工业第五九研究所 | Method for alloying magnesium element on surface layer of aluminum alloy casting |
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