CN103361539A - A cast iron base for thixotropic casting and a manufacturing method thereof - Google Patents
A cast iron base for thixotropic casting and a manufacturing method thereof Download PDFInfo
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- CN103361539A CN103361539A CN2012101478115A CN201210147811A CN103361539A CN 103361539 A CN103361539 A CN 103361539A CN 2012101478115 A CN2012101478115 A CN 2012101478115A CN 201210147811 A CN201210147811 A CN 201210147811A CN 103361539 A CN103361539 A CN 103361539A
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- 238000005266 casting Methods 0.000 title claims abstract description 63
- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 230000009974 thixotropic effect Effects 0.000 title abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000010439 graphite Substances 0.000 claims abstract description 25
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 25
- 229910001567 cementite Inorganic materials 0.000 claims abstract description 23
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 92
- 229910052742 iron Inorganic materials 0.000 claims description 41
- 239000002184 metal Substances 0.000 claims description 37
- 229910052751 metal Inorganic materials 0.000 claims description 37
- 238000000034 method Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 15
- 239000004576 sand Substances 0.000 claims description 15
- 238000009826 distribution Methods 0.000 claims description 14
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 238000005058 metal casting Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 19
- 238000002844 melting Methods 0.000 description 11
- 239000002994 raw material Substances 0.000 description 10
- 238000009749 continuous casting Methods 0.000 description 9
- 239000012071 phase Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000137 annealing Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000005087 graphitization Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000010451 perlite Substances 0.000 description 3
- 235000019362 perlite Nutrition 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000010120 permanent mold casting Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 229910001037 White iron Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- HQFCOGRKGVGYBB-UHFFFAOYSA-N ethanol;nitric acid Chemical compound CCO.O[N+]([O-])=O HQFCOGRKGVGYBB-UHFFFAOYSA-N 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000013138 pruning Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Continuous Casting (AREA)
Abstract
The invention relates to a cast iron base for thixotropic casting and a manufacturing method thereof. The cast iron base for thixotropic casting comprises a hypoeutectic component including, by weight, from 2.0% to 3.0% of C and from 1.50% to 2.50% of Si. The metallic tissue characteristics of the cast iron base is that net-distributed cementite (Fe3C) high-carbon precipitated phase is formed at ferro matrix realm, or the high-carbon precipitated phase and a little graphite distributed finely and punctiformly are formed.
Description
Technical field
The present invention relates to thixotroping and cast cylinder iron base and manufacture method thereof.
Background technology
The semi-melting casting is the semi-melting state that cast material is heated to solid phase and liquid phase and deposits, under low melt temperature, be cast in the casting mold, the thermal load that compares casting mold with common casting is little, the life of casting mold, has good economy, therefore, as the casting of cast iron and attract attention.
In the semi-melting casting of cast iron, 2 kinds of rheological casting technology and thixotroping castings are arranged, wherein, rheological casting technology is: the temperature with iron cooling, between remaining on from the liquidus temperature to the solidus temperature, directly casting mold (metal mold) is cast (for example patent documentation 1); The thixotroping casting is: the shape that makes purpose composition iron temporarily be frozen into regulation forms solid, utilizes afterwards the heating means such as high-frequency induction to make it at the semi-melting state, and mold is cast.
But the rheological casting technology of patent documentation 1 is difficult to quantitative to casting weight, and temperature control is complicated, is difficult to carry out stable production.
And the described thixotroping of latter casting rule does not have such problem, thereby as good economy performance, the semi-melting casting that production stability is high and being expected.Patent documentation 2 is thixotroping casting examples of hypoeutectic composition cast iron.
In addition, as the method for the starting material baslled iron of making thixotroping casting usefulness, the method (for example patent documentation 4) that known horizontal continuous-casting method (for example patent documentation 3) is arranged and adopt water-cooled copper mold continuous casting machine to carry out semicontinuous casting.
The prior art document
[patent documentation 1] TOHKEMY 2006-122971 communique
[patent documentation 2] TOHKEMY 2005-290420 communique
[patent documentation 3] TOHKEMY 2003-290878 communique
No. 4076155 communique of [patent documentation 4] Japanese Patent
Summary of the invention
But, in the horizontal continuous-casting method of patent documentation 3, owing in high temperature atmosphere, be cooled, so sometimes generate surface film oxide, and when the thixotropic injection moulding, be blended in the goods.Therefore, according to circumstances, whole of the side of need to pruning, cost uprises.In addition, Decarburized layer is pruned in the cut surface, thereby the conformality when baslled iron heated impacts.
Further because starting material are hypoeutectic compositions, so the temperature interval of liquidus line and solidus curve is wide, setting time is long.And because the cementite crystallization, thereby the shrinking percentage when solidifying is large.Therefore, continuous casting as patent documentation 3,4 is at dynamical state, namely solidifies under the state that existence between cast material and the mold relatively moves, therefore the defective that easily occurs " tunicle " this uniqueness on the surface, locate to cause the surface inhomogeneous at oscillation mark (oscillation mark), affect the conformality of thixotroping cast baslled iron.And, can not near-net-shape (near net shape), consequently cut-out expense uprises.
The present invention is the technical scheme of In view of the foregoing finishing, and problem is, provides the operations such as temperature control that do not need complexity, the thixotroping that does not rely on continuous casting, cheapness to make to cast cylinder iron base and manufacture method thereof.
In order to solve above-mentioned problem, the inventor etc. have finished the present invention through repeatedly research.Making thixotroping when casting cylinder iron base, employing has the starting material that hypoeutectic forms, utilize common in casting mold static castmethod of solidifying, do not need complicated temperature control, by control tissue suitably, thereby can not rely on continuous casting and obtain near-net-shape and do not produce the cast iron base of defective.
The present invention is based on the technical scheme of such idea, and following (1)～(7) are provided.
(1) cylinder iron base is cast in a kind of thixotroping, it is characterized in that, has the hypoeutectic that contains 2.0～3.0% C, 1.50～2.50% Si in quality % and forms; Its metal structure characteristics are to form the cementite (Fe of net distribution at iron-based body boundary
3C) high-carbon precipitated phase, or form the graphite of aforementioned high-carbon precipitated phase and a small amount of fine spot distribution.
(2) cast cylinder iron base according to (1) described thixotroping, it is characterized in that, further contain with quality % and count a kind of or two or more these elements in Cr:0.10～0.50%, B:0.001～0.01%, Mn:0.3～0.8%, Ni:0.5～1.5%.
(3) cast cylinder iron base according to (1) or (2) described thixotroping, it is characterized in that having the Decarburized layer that thickness is 0.01～0.1mm on cast iron base surface.
(4) the cylinder iron manufacture method of base is cast in a kind of thixotroping, it is characterized in that, to have and contain the hypoeutectic of counting C:2.0～3.0%, Si:1.50～2.50% with quality % and form or except this essentially consist, further contain with quality % and count one or more kinds of molten metal castings in Cr:0.10～0.50%, B:0.001～0.01%, Mn:0.3～0.8%, Ni:0.5～1.5% in casting mold, and make it solidify to make the cast iron base with the speed of cooling greater than 20 ℃/min.
(5) cast the cylinder iron manufacture method of base according to (4) described thixotroping, it is characterized in that, forming thickness on the surface of described cast iron base is the Decarburized layer of 0.01～0.1mm.
(6) cast the cylinder iron manufacture method of base according to (4) or (5) described thixotroping, it is characterized in that, described casting mold is metal mold or the sand mold with die cavity, and described molten metal is solidified under static and air-tight state in described die cavity.
(7) cast the cylinder iron manufacture method of base according to each described thixotroping in (4)～(6), it is characterized in that, the cast iron base after the described casting is near-net-shape.
According to the present invention, can not rely on continuous casting and do not need complicated temperature control and obtain thixotroping and cast cylinder iron base.This cast iron base has the hypoeutectic composition of counting C:2.0～3.0%, Si:1.50～2.50% with quality %, and has the cementite (Fe that forms net distribution at iron-based body boundary
3C) high-carbon precipitated phase, or form the metal structure of aforementioned high-carbon precipitated phase and a small amount of fine spot distribution graphite.Be characterized in, in the die cavity of metal mold or sand mold, solidify with stationary state and air-tight state, thereby do not produce " tunicle " such casting flaw.
Owing in above-mentioned airtight die cavity, solidifying, therefore produce thin Decarburized layer on cast iron base surface, making its thickness is 0.01～0.1mm, thereby when thixotroping is cast, even can have the excellent in shape retentivity at the semi-melting state, and Decarburized layer can not remain in the goods as non-melts yet.
In addition, do not cast in sand mold, metal mold owing to not using continuous casting equipment, therefore can reduce installation cost.In addition, be near-net-shape owing to can make as raw-material cast iron base, therefore do not need to cut off.
Description of drawings
[Fig. 1] is the sectional view that is illustrated in one example of the structure of employed casting mold when making cast iron base of the present invention.
[Fig. 2] be use graphitic cast iron metal mold processed of embodiment 1 and the baslled iron cast, by the metal structure photo of opticmicroscope generation.
[Fig. 3] uses the chromite sand mold of embodiment 3 and the metal structure photo baslled iron cast, that generated by opticmicroscope.
[Fig. 4] is the metal structure photo silica sand of usage comparison example 1 and the baslled iron cast, that generated by opticmicroscope.
Nomenclature
1; Casting mold
2; Die cavity
3; The molten metal running channel
4; Rising head
5; Jacket
Embodiment
Below, with reference to accompanying drawing embodiments of the present invention are described.
Thixotroping of the present invention is cast base cylinder iron and is had and contain the hypoeutectic of counting C:2.0～3.0%, Si:1.50～2.50% with quality % and form; Have: by consist of the iron-based body at the cementite (Fe of crystal boundary with net distribution
3C) the high-carbon precipitated phase that forms perhaps contains described high-carbon precipitated phase and a small amount of imperceptibly metal structure of the graphite of spot distribution.
C is 2.0～3.0%, because: if be lower than 2.0%, then do not form cementite, thereby can't form white iron; Otherwise, if surpass 3.0%, then replace cementite and separate out flake graphite.
Si is the promotion element of graphite.Be 1.50～2.50%, because: if be lower than 1.50%, increased the graphitizing annealing time of cementite after the thixotroping moulding, under certain conditions even can not carry out greying; Otherwise, if surpass 2.50%, then in cast sections, replace cementite crystallization to go out graphite.
Except these basal component, preferably further contain with quality % and count one or more kinds of elements in Cr:0.10～0.50%, B:0.001～0.01%, Mn:0.3～0.8%, Ni:0.5～1.5%.
Cr is the promotion element of cementite, contains the Cr more than 0.10%, can promote to form cementite.On the other hand, if more than 0.50%, then the graphitization processing time elongated, under certain conditions even can not greying.
B is the element with double effects as described below.That is, B is the promotion element of cementite in solidification stages on the one hand, by its interpolation, can more easily form cementite.On the other hand, have the graphited effect of promotion in the stage of anneal, therefore can shorten the graphitizing annealing time.These effects can brought into play more than 0.001% effectively, and surpassing 0.01% effect can be saturated.
Mn is the promotion element with the same cementite of Cr, and is to strengthen matrix element.If its content is less than 0.3%, then easily indigenous graphite, and also the product strength of semi-melting thixotropic forming is low.On the other hand, if more than 0.8%, then the graphitization processing time elongated, under certain conditions even can not greying.
Ni mainly is the element that makes iron-based body highly malleablized.If its content is less than 0.5%, then make the effect of the goods highly malleablized behind the semi-melting thixotropic forming little.On the other hand, because Ni is expensive element, therefore, if surpass 1.5%, then can't obtains to improve the intensity that partly conforms to cost and improve effect.
Their remainder is Fe and inevitable impurity.
Make the raw-material metal structure of this cast iron base become by consist of the iron-based body at the cementite (Fe of crystal boundary with net distribution
3C) the high-carbon precipitated phase that forms or contain described high-carbon precipitated phase and a small amount of imperceptibly metal structure of the graphite of spot distribution is because reason as described below.
Easily form the large flake graphite of size at the cast sections high-carbon as the graphite of graphite crystallization from liquid, growth.By annealing, this graphite does not change, thereby the intensity of infringement goods.So, need to solidification stages basically whole carbon as the cementite crystallization.On the other hand, the graphite that is accompanied by the crystallization of cementite and separates out is fine, can not cause to the character of goods detrimentally affect, and, when graphitizing annealing, become the nuclear of graphite and have the effect of the graphitization time that shortens cementite, therefore allow the graphite that contains a small amount of fine spot distribution.
In this case, the volume fraction of preferred graphite is lower than 2%, and it is of a size of below the 0.01mm.If the volume fraction of graphite is more than 2%, then when crystallizing out, graphite forms sheet from liquid, and the product strength of semi-melting thixotroping moulding reduces.In addition, if the size of graphite greater than 0.01mm, then forms sheet, the intensity of goods still reduces.
In making as the process of thixotroping casting with raw-material cast iron base, form the few Decarburized layer of C amount on its surface, be the scope of 0.01～0.1mm but preferably make the thickness of this Decarburized layer.If the thickness of Decarburized layer is lower than 0.01mm, then when being the semi-melting state for the cast iron base being carried out the thixotroping casting, can not keep shape, be difficult to the cast iron base is transported to mold.On the other hand, if Decarburized layer surpasses 0.1mm, then when casting, remain in the goods as non-melts, form defective.
Below, the manufacture method as the raw-material cast iron base of thixotroping casting is described.
At first, then the molten metal that preparation has the cast iron of above-mentioned composition, in the casting mold with cylindrical or rectangle die cavity (metal mold or sand mold), fully solidifies the cast iron molten metal casting with stationary state and air-tight state in die cavity.
Fig. 1 is illustrated in employed casting mold structure cross section legend this moment.Casting mold 1 is sand mold or metal mold, forms therein die cavity 2.3 is molten metal passage, and 4 is hot top, and 5 is jacket.When the casting molten metal, molten metal is injected molten metal running channel 3, enter the die cavity 2 from the below.Then, in die cavity 2 with stationary state and air-tight state and molten metal is fully solidified.
At this moment, in casting mold (die cavity), make it to solidify greater than 20 ℃/min speed of cooling.Form thus above-mentioned metal structure.Speed of cooling 20 ℃/when min is following, will separate out large-sized flake graphite, can reduce the intensity of goods.Should illustrate, said speed of cooling refers to the speed of cooling before the eutectic temperature point in cooling curve in the present invention.
In order to form the speed of cooling greater than 20 ℃/min, the selection of mold material is important, and as metal mold, preferably fine copper, graphitic cast iron, and the material such as carbon steel as sand mold, can preferably use chromite sand.But, if use quartz sand, because heat conductivity is low thereby speed of cooling is little, can't obtain desirable tissue.
In addition, owing to cooling off this moment, therefore produce thin Decarburized layer on the surface in airtight mold, the thickness of this Decarburized layer can be controlled by the coated material (kind) that is coated on the mold inboard.For example, be coated on the inboard of metal pattern by the coating with alumina series, can be with the gauge control of the Decarburized layer scope to the 0.01～0.1mm that belongs to preferable range.
Thus, can not rely on continuous manufacturing and do not need complicated control ground to obtain raw-material cast iron base as thixotroping casting usefulness.
Like this, owing to solidify in stationary state, thereby can not produce the defective as " tunicle ".Do not need in addition continuous casting equipment, can in sand mold, metal mold, cast, therefore can reduce installation cost.In addition, can make as raw-material cast iron base is near-net-shape, does not therefore need to cut off.And, do not need the composition control of the complexity as the situation of using rheological casting technology yet.
Embodiment
Below, embodiments of the invention are described.
(embodiment 1: permanent mold casting example 1)
As casting mold, select the metal mold of graphitic cast iron system, namely die cavity is of a size of φ 65mm length 130mm and is provided with the insulated feeder of having used jacket on top.It 180 ℃ of preheatings, is coated with the coating of alumina series in the die cavity inboard.
In such casting mold die cavity, inject the cast iron molten metal of counting C:2.6%, Si:1.6% with quality % and cast cast iron base as the thixotroping casting raw material.Casting temp is 1450 ℃.Speed of cooling is 110 ℃/min.
Cut off from the central part of the length direction of the cylindric baslled iron of gained, carry out the quality inspection of cut surface.In cut surface, the casting flaws such as pore, pin hole all do not have, and inside quality is good.
From baslled iron, take sample, carry out the corrosion of nitric acid ethanol, by opticmicroscope metal structure is observed.The metal structure photo is shown in Fig. 2 (observation place: lower (1/2H)-distance center 15mm(1/4t)) at this moment.As shown in Figure 2, matrix is perlite, and carbon is at the cementite (Fe of crystal boundary as net distribution
3C; Represented by C among the figure) and exist, do not observe separating out of graphite.In addition, the result that the surface of baslled iron is investigated is that the thickness that distributing on surface uniform ground is the Decarburized layer of 0.04mm.
The baslled iron that obtains is heated to 1150～1180 ℃ that belong to the solid-liquid zone, and the result obtains good conformality.Use the cast iron base of this semi-melting state, in the thixotroping casting device of inert gas environment, carry out the thixotroping casting.
Use 10 in the goods obtain with sample survey, cut off respectively central part, tensile property, metal structure and inside quality are investigated.Any one goods does not all detect subsurface defect, is sound goods.And the result of tension test is that the acquisition tensile strength is the intensity values of 600MPa.
(embodiment 2: permanent mold casting example 2)
Use the pure copper metal mold as casting mold, in addition, cast similarly to Example 1 the cast iron base as the thixotroping casting raw material.Casting temp is 1460 ℃.Speed of cooling is 290 ℃/min.
Carry out similarly to Example 1 structure observation, matrix is perlite as a result, and carbon is at the cementite (Fe of crystal boundary as net distribution
3C) exist, do not observe separating out of graphite.In addition, the result that the surface of baslled iron is investigated is that the thickness that distributing on surface uniform ground is the Decarburized layer of 0.02mm.
(embodiment 3: sand mold casting example 1)
Use the chromite sand mold as casting mold, in addition, cast similarly to Example 1 the cast iron base as the thixotroping casting raw material.Casting temp is 1430 ℃.Speed of cooling is 24 ℃/min.
Carry out similarly to Example 1 structure observation, the result is shown in the metal structure photo of Fig. 3, and matrix is perlite, and carbon is at the cementite (Fe of crystal boundary as net distribution
3C; Represented by C among the figure) and exist, do not observe separating out of graphite.In addition, the result that the surface of baslled iron is investigated is that the thickness that distributing on surface uniform ground is the Decarburized layer of 0.07mm.
(comparative example 1: sand mold casting example 2)
Use silica sand as casting mold, in addition, cast similarly to Example 1 the cast iron base as the thixotroping casting raw material.Casting temp is 1430 ℃.Speed of cooling is 12 ℃/min.Carry out similarly to Example 1 structure observation, the result has separated out thick flake graphite (being represented by G among the figure) shown in the metal structure photo of Fig. 4.
These results are gathered be shown in table 1.
[table 1]
Claims (8)
1. cylinder iron base is cast in a thixotroping, it is characterized in that, has the hypoeutectic that contains 2.0～3.0% C, 1.50～2.50% Si in quality % and forms; Its metal structure characteristics are to form the cementite Fe of net distribution at iron-based body boundary
3C high-carbon precipitated phase, or form the graphite of aforementioned high-carbon precipitated phase and a small amount of fine spot distribution.
2. cylinder iron base is cast in thixotroping according to claim 1, it is characterized in that, further contains a kind of or two or more among 0.10～0.50% Cr, 0.001～0.01% B, 0.3～0.8% Mn, 0.5～1.5% the Ni in quality %.
3. cylinder iron base is cast in thixotroping according to claim 1 and 2, it is characterized in that, has the Decarburized layer that thickness is 0.01～0.1mm on its surface.
4. the cylinder iron manufacture method of base is cast in a thixotroping, it is characterized in that, to have the hypoeutectic that contains 2.0～3.0% C, 1.50～2.50% Si in quality % and form or beyond this essentially consist, further contain in quality % one or more kinds of molten metal castings among 0.10～0.50% Cr, 0.001～0.01% B, 0.3～0.8% Mn, 0.5～1.5% the Ni in casting mold, and make it solidify to make the cast iron base with the speed of cooling greater than 20 ℃/min.
5. the cylinder iron manufacture method of base is cast in thixotroping according to claim 4, it is characterized in that, forming thickness on the surface of described cast iron base is the Decarburized layer of 0.01～0.1mm.
According to claim 4 or 5 described thixotropings cast the cylinder iron manufacture method of base, it is characterized in that, described casting mold is metal mold or the sand mold with die cavity, and described molten metal is solidified under static and air-tight state in described die cavity.
According to claim 4 or 5 described thixotropings cast the cylinder iron manufacture method of base, it is characterized in that, the cast iron base after the described casting is near-net-shape.
8. the cylinder iron manufacture method of base is cast in thixotroping according to claim 6, it is characterized in that, the cast iron base after the described casting is near-net-shape.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012089008A JP5453480B2 (en) | 2012-04-10 | 2012-04-10 | Cast iron billet for thixocasting and manufacturing method thereof |
| JP2012-089008 | 2012-04-10 |
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| CN103361539A true CN103361539A (en) | 2013-10-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108262448A (en) * | 2018-02-01 | 2018-07-10 | 太原理工大学 | A kind of casting copper mould for improving the spontaneous quasi-crystalline substance content of Mg-Zn-Al alloys |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005290420A (en) * | 2004-03-31 | 2005-10-20 | Honda Motor Co Ltd | Cast iron material and manufacturing method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0543978A (en) * | 1991-08-12 | 1993-02-23 | Leotec:Kk | Cast iron for die casting in solid-liquid coexisting area and its using method |
| JP3096176B2 (en) * | 1992-09-28 | 2000-10-10 | 株式会社レオテック | Solid-liquid coexistence zone die casting method of white cast iron |
| JP3876099B2 (en) * | 1999-10-25 | 2007-01-31 | 本田技研工業株式会社 | Fe-based alloy material for thixocasting |
| JP3730148B2 (en) * | 2001-09-06 | 2005-12-21 | 本田技研工業株式会社 | Fe-based alloy material for thixocasting and casting method thereof |
| JP4063700B2 (en) * | 2003-03-28 | 2008-03-19 | 本田技研工業株式会社 | Semi-melt forming iron-carbon alloy and semi-melt forming method and semi-melt formed body using the same |
| JP2010131635A (en) * | 2008-12-04 | 2010-06-17 | Nippon Steel Corp | Die-cast molding method for iron and die-cast molded body |
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- 2012-04-10 JP JP2012089008A patent/JP5453480B2/en not_active Expired - Fee Related
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005290420A (en) * | 2004-03-31 | 2005-10-20 | Honda Motor Co Ltd | Cast iron material and manufacturing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108262448A (en) * | 2018-02-01 | 2018-07-10 | 太原理工大学 | A kind of casting copper mould for improving the spontaneous quasi-crystalline substance content of Mg-Zn-Al alloys |
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| Publication number | Publication date |
|---|---|
| JP2013216950A (en) | 2013-10-24 |
| JP5453480B2 (en) | 2014-03-26 |
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Application publication date: 20131023 |