CN106032560A - Gray cast iron for cylinder liner and method for manufacturing cylinder liner using the same - Google Patents
Gray cast iron for cylinder liner and method for manufacturing cylinder liner using the same Download PDFInfo
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- CN106032560A CN106032560A CN201510103667.9A CN201510103667A CN106032560A CN 106032560 A CN106032560 A CN 106032560A CN 201510103667 A CN201510103667 A CN 201510103667A CN 106032560 A CN106032560 A CN 106032560A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention provides a gray cast iron for a cylinder liner and a method for manufacturing the cylinder liner using the same. The gray cast iron for the cylinder liner is provided that maintains fatigue strength and thermal shock property by adjusting component contents. The gray cast iron includes carbon (C) in an amount of about 3.2 to 3.7 weight % (wt %); silicon (Si) in an amount of about 2.0 to 2.8 wt %; manganese (Mn) in an amount of about 0.50 to 1.0 wt %; phosphorus (P) in an amount of about 0.20 wt % or less, and greater than about 0 wt %; sulfur (S) in an amount of about 0.10 wt % or less, and greater than about 0 wt %; chromium (Cr) in an amount of about 0.50 wt % or less, and greater than about 0 wt %; copper (Cu) in an amount of about 0.20 to 0.80 wt %; molybdenum (Mo) in an amount of about 0.10 to 0.40 wt %; and the balance of iron (Fe), based on the total weight of the gray cast iron.
Description
Technical field
The present invention relates to the ash for cylinder jacket (Cylinder head gasket, cylinder liner, cylinder liner)
Mouth cast iron (gray cast iron) and the method using grey cast-iron manufacture cylinder jacket.Especially, logical
Overregulate molten steel compositions for manufacturing grey cast-iron (molten steel compositions, molten steel compositions,
Molten steel composition) content, the grey cast-iron for cylinder jacket can remain tired strong
Degree and thermal shock resistance properties.
Background technology
Owing to grey cast-iron cost is relatively low and has the performance of excellence, the most it is used widely
The cylinder block of electromotor, cylinder head and cylinder jacket in vehicle.When being used and being manufactured, car
Those building blocks may be used for the material of the compromise hot strength of such as material, fatigue strength etc.
The productivity of performance and such as cost, machinability etc., therefore, it can with suitable horizontal combination ash
The various components of mouth cast iron.
Recently, due to increase, the enhancing etc. of environmental management of vehicle yield, added across
More body, lid and the load of set.Therefore, added for can improve material property and
Maintain the needs of the novel grey cast-iron of the productivity.
Meanwhile, the cylinder jacket of electromotor can be to insert in cylinder block and configure the crucial portion of combustor
Part.Cylinder jacket in correlation technique mainly has the hot strength of about 250MPa by use
General gray cast iron material is formed.Although above-mentioned grey cast-iron goes for wherein combustion pressure and negative
The regular price gasoline electromotor that lotus is relatively low, but work as high yield electromotor or the diesel engine being used for recently developing
During machine, the deterioration of durability can be caused.
In order to overcome the problems referred to above, such as, by alloying element being added to traditional 250MPa
In level cast iron, manufacture 400MPa level cast iron, and its part has been used for large-sized diesel
Electromotor etc..But, compared with traditional material, its manufacturing cost is higher.Additionally, according to tradition skill
Art, it has been proposed that utilize potassium steel waste material for manufacturing the technology of the method for high-strength gray cast iron.
But, although utilize waste material that high intensity can be maintained to reduce production cost simultaneously, but costliness may be added
Alloying element, thus increase manufacturing cost.
Information above disclosed in this background parts is only used for strengthening the understanding of the background to the present invention,
Therefore, it can comprise and be not formed in this country the most
The information of the prior art known.
Summary of the invention
At preferred aspect, the invention provides the content by regulating alloy compositions, it is possible to substantially
Maintain fatigue strength and the grey cast-iron for cylinder jacket of thermal shock resistance properties.Especially, do not adding
In the case of adding the alloying element of costliness, grey cast-iron compositions (gray cast iron composition)
In alloy compositions can be with stabilizing pearlite and improve the hard of basal body structure (matrix structure)
Degree.Further, the invention provides use grey cast-iron compositions for the method manufacturing cylinder jacket.
According to an exemplary embodiment of the present invention, it is provided that for the grey cast-iron of cylinder jacket.
Gross weight based on grey cast-iron, grey cast-iron may include that with about 3.2 weight % (wt%) extremely
The carbon (C) of the amount of 3.7 weight % (wt%), with the silicon (Si) of the amount of about 2.0wt% to 2.8wt%,
With the manganese (Mn) of the amount of about 0.50wt% to 1.0wt%, with about 0.20wt% or lower and greater than about
The phosphorus (P) of the amount of 0wt%, with the sulfur (S) of about 0.10wt% or lower and the amount of greater than about 0wt%,
With the chromium (Cr) of about 0.50wt% or lower and the amount of greater than about 0wt%, with about 0.20wt% extremely
The copper (Cu) of the amount of 0.80wt%, with the molybdenum (Mo) of the amount of about 0.10wt% to 0.40wt% and
The ferrum (Fe) of surplus.Especially, grey cast-iron compositions can meet equation 1 below.
0.8≤Cu+1.5Cr+1.2Mo≤1.5 ... ... ... [formula 1]
In equation 1, Cu, Cr and Mo refer to respectively Cu, Cr and Mo component with wt%
Content.
Grey cast-iron can have about 300MPa or higher hot strength.Grey cast-iron can have
There is about 140MPa or higher fatigue strength.
Also providing for, grey cast-iron can be made up of said components in a combination thereof thing, or substantially
It is made up of said components.Such as, grey cast-iron as described in this article can be based on grey cast-iron
Gross weight is formed by following or be substantially made up of following: with about 3.2 weight % (wt%) to 3.7 weights
The carbon (C) of the amount of amount % (wt%)；Silicon (Si) with the amount of about 2.0wt% to 2.8wt%；With about
The manganese (Mn) of the amount of 0.50wt% to 1.0wt%；With about 0.20wt% or lower and greater than about 0wt%
The phosphorus (P) of amount；Sulfur (S) with about 0.10wt% or lower and the amount of greater than about 0wt%；With
The chromium (Cr) of the amount of about 0.50wt% or lower and greater than about 0wt%；With about 0.20wt% extremely
The copper (Cu) of the amount of 0.80wt%；Molybdenum (Mo) with the amount of about 0.10wt% to 0.40wt%；And
The ferrum (Fe) of surplus.
Another illustrative embodiments according to the present invention, it is provided that for manufacturing the side of cylinder jacket
Method.Described method may include that manufacture gross weight based on grey cast-iron includes following molten steel (steel
Water, molten steel, molten steel): with about 3.2 weight % (wt%) to 3.7 weight % (wt%)
The carbon (C) of amount, with the silicon (Si) of the amount of about 2.0wt% to 2.8wt%, with about 0.50wt% to 1.0wt%
Amount manganese (Mn), with the phosphorus (P) of about 0.20wt% or lower and the amount of greater than about 0wt%,
With the sulfur (S) of about 0.10wt% or lower and the amount of greater than about 0wt%, with about 0.50wt% or more
The chromium (Cr) of the amount of low and greater than about 0wt%, with the copper of the amount of about 0.20wt% to 0.80wt%
(Cu), with molybdenum (Mo) and the ferrum (Fe) of surplus of the amount of about 0.10wt% to 0.40wt%；
And cast molten steel by centrifugal casting.Especially, the component in molten steel compositions can expire
Foot formula 1 as described above.
After the centrifugal casting of molten steel, cylinder jacket can have about 300MPa or higher and draw
Stretch intensity.After the centrifugal casting of molten steel, cylinder jacket can have about 140MPa or higher
Fatigue strength.
Further provided is that and can manufacture by grey cast-iron or by method as described in this article
Vehicle part.
Hereinafter also disclose other aspects of the present invention.
Accompanying drawing explanation
When read in conjunction with the accompanying drawings, by described in detail below, by more clearly understand the above of the present invention and
Other targets, feature and other advantages, in the accompanying drawings:
Fig. 1 shows the exemplary gray mouth for cylinder jacket according to exemplary embodiment of the invention
The exemplary microsctructural photograph of cast iron；And
Fig. 2 shows the microsctructural photograph of the exemplary grey cast-iron according to comparative example.
Detailed description of the invention
It should be understood that term as used in this article " vehicle " or " vehicle " or other classes
The motor vehicles of broad sense are included, as included sport vehicle (SUV), public vapour like term
Car, truck, the passenger carrying vehicle (passenger automobile) of various commerial vehicle；Including various ships
Water carrier with ship；Airborne vehicle etc.；And including motor vehicle driven by mixed power (hybrid vehicle), electricity
Motor-car, plug-in hybrid electric vehicle (plug-in hybrid electric vehicle), hydrogen are dynamic
Power vehicle and other alternative fuel vehicles (such as, are derived from the fuel of resource in addition to oil).
As referenced herein, motor vehicle driven by mixed power is the vehicle with two or more power sources, example
As, petrol power and electric power vehicle.
Term used herein is not merely to describe the purpose of specific illustrative embodiments, and not
It is intended to limit the present invention.As it is used in the present context, unless the context clearly indicates otherwise, no
Then singulative " ", " a kind of " and " being somebody's turn to do " are intended to also include plural form.To manage further
Solving, when used in this specification, term " includes " and/or " comprising " illustrates described feature, whole
Number (overall), step, operation, element (key element) and/or the existence of component (assembly), but not
Get rid of other features one or more, integer (overall), step, operation, element (key element), group
Divide (assembly) and/or the existence of its group or interpolation.As it is used in the present context, term "and/or"
Including the associated one or more any and all combination listed in project.
Unless concrete statement or based on context it is clear that otherwise, as it is used in the present context, will
Term " about " is interpreted as in the art in the range of proper tolerances, such as, at 2 of meansigma methods
In standard deviation.Can " about " be interpreted as described value 10%, 9%, 8%, 7%, 6%,
5%, in 4%, 3%, 2%, 1%, 0.5%, 0.1%, 0.05% or 0.01%.Unless according to up and down
Literary composition is the clearest, and all numerical value the most provided herein are modified by term " about ".
Hereinafter, the illustrative embodiments of the present invention it is more fully described with reference to the accompanying drawings.But,
The present invention is not limited to exemplary embodiments disclosed below, but will implement in a variety of manners.This
The illustrative embodiments of invention makes the present invention open thoroughly, and provides the exemplary reality of the present invention
Execute mode so that those skilled in the art can easily understand that the scope of the present invention.
In an illustrative embodiments, the invention provides grey cast-iron.Based on grey cast-iron
Gross weight, grey cast-iron may include that with about 3.2 weight % (wt%) to 3.7 weight % (wt%)
The carbon (C) of amount；Silicon (Si) with the amount of about 2.0wt% to 2.8wt%；With about 0.50wt% extremely
The manganese (Mn) of the amount of 1.0wt%；With about 0.20wt% or lower and the phosphorus of the amount of greater than about 0wt%
(P)；Sulfur (S) with about 0.10wt% or lower and the amount of greater than about 0wt%；With about 0.50wt%
Or the chromium (Cr) of the amount of lower and greater than about 0wt%；With the amount of about 0.20wt% to 0.80wt%
Copper (Cu)；Molybdenum (Mo) with the amount of about 0.10wt% to 0.40wt%；And the ferrum (Fe) of surplus.
Gross weight based on grey cast-iron, the amount of carbon (C) can be about 3.2wt%'s to 3.7wt%
In the range of.Carbon can be by forming flake graphite and reducing when condensing as used in this article
Carbide is for improving the essential elements of hardness and wearability.Such as, can by carbon content and silicone content
To calculate carbon equivalent (Ceq=C+1/3Si), and when carbon equivalent is close to (such as, close) about 4.3wt%
Process point (processing stand, process points, process point) time, the molten of motlten metal can be reduced
Put and mobility can be improved.But, when the amount of carbon equivalent is more than process point, tool may be increased
There is the crystallization content of the graphite of soft and intensity, thus reduce the intensity of cast iron.Additionally, work as carbon equivalent
Amount less than process point time, the mobility of motlten metal may be reduced, thus cause casting defect, and
And also it is possible to reduce the amount of flake graphite, thus reduce greasy property.Therefore, carbon content is permissible
In the range of about 3.2wt% to about 3.7wt%.When carbon content is less than above-mentioned scope for example, less than about
During 3.2wt%, it is likely to result in casting defect, and when carbon content is greater than about more than above-mentioned scope
During 3.7wt%, may reduce intensity and fatigue life.
Gross weight based on grey cast-iron, the amount of silicon (Si) can be at about 2.0wt% to about 2.8wt%
In the range of.As used in this article silicon can be determine together with carbon carbon equivalent essential element it
One, and can contribute to form graphite and improve the element of non-oxidizability.Due to when by carbon amounts
When increasing with the silicone content in the carbon equivalent of silicon amount calculating, the formation of graphite can be promoted, even if therefore
Under identical carbon amounts, it is also possible to increase the crystallization content of graphite.Additionally, by being formed in an oxidizing environment
Si base oxidation-resistant film, silicon can increase heat resistance and improve the thermal shock resistance properties of material.Therefore,
By being limited in by silicone content in the range of about 2.0wt% to 2.8wt%, can suitably obtain casting
Property and antioxygenic property.
Gross weight based on grey cast-iron, the amount of manganese (Mn) can be at about 0.50wt% to 1.0wt%
In the range of.Manganese can be to combine to form the element of MnS with sulfur (S) as used in this article,
And MnS can be that mutually and stable carbide is to improve intensity for lubrication.But, when Fe content is little
When the scope for example, less than about 0.5wt% proposed, possible insufficient formation MnS, accordingly, it is possible to
Cannot ensure the lubricity of aspiration level.When Fe content is greater than about 1.0wt% more than the scope proposed
Time, the crystallization of graphite may be stoped and the formation of rough carbide may be promoted, accordingly, it is possible to fall
Low friction performance.Therefore, Fe content may be embodied in the range of about 0.50wt% to 1.0wt%, because of
This, can form the lubrication phase of the MnS of appropriate amount, thus improve frictional behaviour.
Gross weight based on grey cast-iron, the amount of phosphorus (P) can at about 0.20wt% or lower and
In the range of greater than about 0wt%.Although phosphorus can be considered impurity, but when adding substantial amounts of phosphorus,
Phosphorus can be formed in basal body structure has Fe3Steadite phase (the steadite of the high rigidity of P composition
Phase) thus improve wearability.When the steadite of appropriate amount is substantially uniformly distributed over matrix mutually
Time in structure, it is provided that beneficial effect.But, owing to substantial amounts of rough steadite reduces mutually
Machinability, therefore can be limited in the content of phosphorus in about 0.2wt%.
Gross weight based on grey cast-iron, the amount of chromium (Cr) can at about 0.50wt% or lower and
In the range of greater than about 0wt%.The amount of copper (Cu) can be at the model of about 0.20wt% to 0.80wt%
In enclosing, and the amount of molybdenum (Mo) can be in the range of about 0.10wt% to 0.40wt%.As at this
In literary composition use, copper (Cu), chromium (Cr) and molybdenum (Mo) can be stabilizing pearlite and
Improve the element of the hardness of basal body structure, it is thus possible, for instance increased by solid solution and deposition enhancement effect
Add the hardness of product.But, when its addition is more than scheduled volume, may deterioration machinability.
Especially, copper can be one of most important element of stabilizing pearlite, and adds appropriate amount
Copper can be crucial.Additionally, due to molybdenum during partly solid is dissolved in basal body structure so that
Increase at relatively high temperatures resistance to soft (the soft resistance) of basal body structure, therefore when producing
Parts when being exposed to thermal shock, due to the molybdenum of appropriate amount, it is possible to improve durability.Therefore,
The best ratio of Cr, Cu and Mo content is already had accounted for by many tests, therefore, can
Cr to be most preferably limited to the content of the largest of about 0.5wt%, Cu most preferably can be limited to
Content in the range of about 0.2wt% to 0.8wt%, and Mo most preferably can be limited to about
Content in the range of 0.1wt% to 0.4wt%.
In an exemplary embodiment of the present invention, it is possible to use typical centre spinning method is used
In having the molten steel of above-mentioned composition (composition) to manufacture and there is the fatigue significantly improved by force
Degree and the cylinder jacket of thermal shock resistance properties.Especially, when regulating the content of every kind of component in molten steel,
Can regulate Cu, Cr and Mo with the content of wt% to maintain about 300MPa or higher
The hot strength of cylinder jacket, and maintain about 140MPa or higher fatigue strength.Such as, combination
Thing (composition) can meet equation 1 below.
0.8≤Cu+1.5Cr+1.2Mo≤1.5 ... ... [formula 1]
In equation 1, except as otherwise noted, the most for convenience of description, will be by Cu+1.5Cr+
The value that 1.2Mo calculates is referred to as " A ".In equation 1, Cu, Cr and Mo refer to Cu, Cr respectively
And Mo component with the content of wt%.
Value A calculated by formula 1 is may determine that by the content of Cu, Cr and Mo.Cu、Cr
And Mo can be dissolved in basal body structure with solid, and its part could be for forming micro-carbonization
The element of thing (micro-carbide).When A on duty meets the scope of about 0.8 to 1.5, can make
The reduction of machinability minimizes, and can suitably obtain target material performance such as hot strength and
Fatigue strength.When A on duty is greater than about 1.5 more than the scope proposed, it is possible to create rough has
Evil carbide, and when A on duty is less than scope for example, less than about 0.8 proposed, may will not realize
Target material performance.
Embodiment
Hereinafter, with reference to comparative example and inventive embodiments, the present invention will be described.
The working condition of the cylinder jacket according to commercial production produces final product, according to final product
The product perparation of specimen.Then, measure hardness, hot strength, fatigue strength, thermal fatigue life and
Machinability.
As shown in Table 1, in inventive embodiments 1 and 2 and comparative example 1 to 5, preparation
There is the molten steel of the constituent content of regulation, then manufactured every kind of cylinder by centre spinning method
Set.Additionally, prepare sample by the cylinder jacket manufactured.
[table 1]
Meanwhile, after the sample making preparation flattens, use Brinell's machine (Brinell machine)
Measure hardness, by measuring hot strength by KS D0801 8A sample processing cylinder jacket, and will
Fatigue strength is defined as to be had the sample of non-notch shape in manufacture and carries out rotary bending fatigue examination
After testing when fatigue life be 1,000,000 times circulation or higher time load.Additionally, at thermal mechanical fatigue
Under the conditions of under conditions of the about beam ratio (constraint ratio) of about 40% at about 100 DEG C to 350 DEG C
Temperature interval under carry out thermal fatigue life test by repeating heating and cooling, and when carry out
During the rough lapping of the internal diameter of described set, calculate machinability according to life tools.Show in table 2
Result from measured value.Additionally, use the optical microscope shooting invention of 100 x magnifications to implement
Example and the microstructure of comparative example, and illustrated in fig. 1 and 2.
[table 2]
As shown in table 2, it is to be understood that in inventive embodiments 1 and 2, improve
Mechanical performance.Such as, with compared with the comparative example 1 of traditional material, hardness improves about 5% to 10%,
Hot strength improves about 20%, and fatigue strength improves about 40% to 50%.Furthermore, it is possible to
Being understood by, thermal fatigue life significantly increases about 3 times or higher, and machinability maintains 90%
Or higher level.Additionally, Fig. 1 show according to exemplary embodiment of the invention manufacture for
The exemplary microsctructural photograph of the exemplary grey cast-iron of cylinder jacket, and according to inventive embodiments 1
With the microsctructural photograph of 2 it is understood that be formed uniformly micro-carbon in pearlite matrix structure
Compound.
Additionally, the result of inventive embodiments 1 and 2 with comparative example 2 to 5 is compared, although depositing
Comparative example shows the situation of the hardness of improvement, hot strength and fatigue strength etc. wherein, but
Various performances combined aspects it is understood that the hardness of comparative example 2 to 5, hot strength,
And fatigue strength etc. is less than inventive embodiments 1 and 2.
Meanwhile, Fig. 2 shows that the exemplary microstructure of the traditional grey cast-iron according to comparative example is shone
Sheet.Such as, comparative example 1 is the general gray cast iron material producing traditional 250MPa level cylinder jacket,
And have the hardness of about 93 (HRB), the hot strength of about 260MPa, about 98MPa tired
Labor intensity and when at rough lapping comparative example 1, the reference (100%) of machinability being defined as
The thermal fatigue life of about 135 circulations during life tools.Additionally, as shown in Figure 2, on pearl
Flake graphite is defined on body of light basal body structure.
Meanwhile, comparative example 2 have the present invention propose in the range of (suggestion) value as Cu, Cr
And value A of the total scope of Mo content, but the model that the content of every kind of element proposes in the present invention
Outside enclosing.Such as, Cr content is more than the value proposed so that define substantial amounts of rough Cr base carbonization
Thing, as shown in Figure 2.Therefore, compared with inventive embodiments 1, improve hardness, but do not have
Be significantly improved other materials performance.
Additionally, comparative example 3 includes meeting every kind of element of the scope that the present invention proposes, but as Cu,
Value A of the total scope of Cr and Mo content is more than the value proposed, such as, greater than about 1.5.As
Shown in figure 2, in comparative example 3, owing to excessively forming micro-carbide, therefore show when hardness
When writing increase, machinability significantly reduces.
Further, comparative example includes the every kind of element meeting the scope that the present invention proposes, but does not obtain
Obtain value A of the total scope as Cu, Cr and Mo content in the range of the present invention proposes.
As shown in Figure 2, owing to not being horizontally formed micro-carbide, therefore with comparative example 1 with expectation
Compare, improve material property, but compared with inventive embodiments 1 and 2, fatigue strength and heat exhaustion
Life-span does not meet aspiration level.
Additionally, comparative example 5 have in the range of proposition value of the present invention as Cu, Cr and Mo
Value A of the total scope of content, but the content of Mo is not in the range of the present invention proposes.As at figure
Shown in 2, owing to not being horizontally formed micro-carbide with expectation, the most most of material properties are full
Foot-eye level, but compared with inventive embodiments 1 and 2, thermal fatigue life significantly reduces.
Therefore, in order to by being properly formed micro-carbide in pearlite matrix structure and to expect water
Put down and maintain or improve hardness, hot strength, fatigue strength, thermal fatigue life and machinability,
The content of Cu, Cr and Mo can be controlled so that value A obtained by formula 1 can from
In the range of about 0.8 to 1.5.
According to the various illustrative embodiments of the present invention, cast by being adjusted optimally for manufacturing ash mouth
The molten steel component of ferrum is particularly likely to affect pearlite stability and basal body structure hardness improves
The content of alloy compositions, can manufacture 300MPa level gray cast iron material, with traditional 250MPa
Level grey cast-iron is compared, and this 300MPa level gray cast iron material can have the stretching improving about 20%
Intensity.
Thus, it is possible to obtain the fatigue strength of the about 140MPa of grey cast-iron, with traditional 100
MPa compares, and this fatigue strength can improve about 40%, and by significantly improving thermal shock resistance properties also
The grey cast-iron also even being able to use in high temp/high pressure power combustor can be manufactured.Additionally, due to
Machinability can maintain the level being similar to traditional material, therefore it is expected to notable in terms of production
Advantage.
Although accompanying drawing and various illustrative embodiments by reference to the present invention describe the present invention, but
The invention is not restricted to this, and limit in the dependent claims.Therefore, without departing substantially from by appended
In the case of the spirit and scope that claims limit, the present invention can be entered by those skilled in the art
The various modifications and changes of row.
Claims (8)
1. for a grey cast-iron for cylinder jacket, including:
Gross weight based on described grey cast-iron is with the carbon C of the amount of 3.2wt% to 3.7wt%；
Gross weight based on described grey cast-iron is with the silicon Si of the amount of 2.0wt% to 2.8wt%；
Gross weight based on described grey cast-iron is with the manganese of the amount of 0.50wt% to 1.0wt%
Mn；
Gross weight based on described grey cast-iron is with 0.20wt% or lower and more than 0wt%
The phosphorus P of amount；
Gross weight based on described grey cast-iron is with 0.10wt% or lower and more than 0wt%
The sulfur S of amount；
Gross weight based on described grey cast-iron is with 0.50wt% or lower and more than 0wt%
The chromium Cr of amount；
Gross weight based on described grey cast-iron is with the copper of the amount of 0.20wt% to 0.80wt%
Cu；
Gross weight based on described grey cast-iron is with the molybdenum of the amount of 0.10wt% to 0.40wt%
Mo；And
The ferrum Fe of surplus,
Wherein, described grey cast-iron meets equation 1 below,
0.8≤Cu+1.5Cr+1.2Mo≤1.5 ... ... ... [formula 1]
In equation 1, Cu, Cr and Mo refer to Cu, Cr and Mo component respectively
Content with wt%.
Grey cast-iron the most according to claim 1, wherein, described grey cast-iron has 300MPa
Or higher hot strength.
Grey cast-iron the most according to claim 1, wherein, described grey cast-iron has 140MPa
Or higher fatigue strength.
Grey cast-iron the most according to claim 1, substantially consists of:
Gross weight based on described grey cast-iron is with the carbon C of the amount of 3.2wt% to 3.7wt%；
Gross weight based on described grey cast-iron is with the silicon Si of the amount of 2.0wt% to 2.8wt%；
Gross weight based on described grey cast-iron is with the manganese of the amount of 0.50wt% to 1.0wt%
Mn；
Gross weight based on described grey cast-iron is with 0.20wt% or lower and more than 0wt%
The phosphorus P of amount；
Gross weight based on described grey cast-iron is with 0.10wt% or lower and more than 0wt%
The sulfur S of amount；
Gross weight based on described grey cast-iron is with 0.50wt% or lower and more than 0wt%
The chromium Cr of amount；
Gross weight based on described grey cast-iron is with the copper of the amount of 0.20wt% to 0.80wt%
Cu；
Gross weight based on described grey cast-iron is with the molybdenum of the amount of 0.10wt% to 0.40wt%
Mo；And
The ferrum Fe of surplus.
5., for the method manufacturing cylinder jacket, comprise the following steps:
Manufacture gross weight based on described grey cast-iron and include following molten steel: with 3.2wt%
To 3.7wt% amount carbon C, with the silicon Si of the amount of 2.0wt% to 2.8wt%, with 0.50wt%
To 1.0wt% amount manganese Mn, with 0.20wt% or lower and the phosphorus of amount more than 0wt%
P, with 0.10wt% or lower and more than 0wt% amount sulfur S, with 0.50wt% or lower
And the chromium Cr of the amount more than 0wt%, with the copper Cu of the amount of 0.20wt% to 0.80wt%,
Molybdenum Mo and the ferrum Fe of surplus with the amount of 0.10wt% to 0.40wt%；And
Described molten steel is cast by centrifugal casting,
Wherein, the component of described molten steel meets equation 1 below,
0.8≤Cu+1.5Cr+1.2Mo≤1.5 ... ... ... [formula 1]
In equation 1, Cu, Cr and Mo refer to Cu, Cr and Mo component respectively
Content with wt%.
Method the most according to claim 5, wherein, in the described centrifugal casting of described molten steel
Afterwards, described cylinder jacket has 300MPa or higher hot strength.
Method the most according to claim 5, wherein, in the described centrifugal casting of described molten steel
Afterwards, described cylinder jacket has 140MPa or higher fatigue strength.
8. the vehicle part manufactured by grey cast-iron according to claim 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2014-0139790 | 2014-10-16 | ||
| KR1020140139790A KR20160045182A (en) | 2014-10-16 | 2014-10-16 | Gray cast iron for cylinder liner and method for manufacturing cylinder liner using the same |
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| CN106032560A true CN106032560A (en) | 2016-10-19 |
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| Country | Link |
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| US (1) | US20160108503A1 (en) |
| JP (1) | JP2016079498A (en) |
| KR (1) | KR20160045182A (en) |
| CN (1) | CN106032560A (en) |
| DE (1) | DE102015204244A1 (en) |
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| CN115725891A (en) * | 2021-08-31 | 2023-03-03 | 通用汽车环球科技运作有限责任公司 | High modulus, high strength and low alloy gray cast iron for cylinder liners and automotive applications |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6416860B2 (en) * | 2016-12-23 | 2018-10-31 | 株式会社クボタ | Cast iron, cast iron manufacturing method, and cylinder block |
| KR102542938B1 (en) * | 2017-12-08 | 2023-06-14 | 현대자동차주식회사 | High strength grey cast iron |
| JP6533858B1 (en) * | 2018-07-26 | 2019-06-19 | Ｔｐｒ株式会社 | Cast iron cylinder liner and internal combustion engine |
| CN113234881A (en) * | 2021-04-13 | 2021-08-10 | 浙江汉声精密机械有限公司 | Technique for eliminating defect of gray iron casting Tang Ke |
| CN114574752B (en) * | 2022-02-25 | 2023-02-28 | 宁国东方碾磨材料股份有限公司 | Free-cutting gray cast iron alloy for cylinder block and preparation method thereof |
| CN115109988B (en) * | 2022-06-17 | 2023-10-27 | 华能核能技术研究院有限公司 | Gray cast iron casting and preparation method thereof |
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|---|---|---|---|---|
| JPH05285599A (en) * | 1991-04-11 | 1993-11-02 | Hitachi Metals Ltd | Horizontal continuous casting mold and hollow member produced by this mold |
| JPH06207240A (en) * | 1993-01-07 | 1994-07-26 | Kubota Corp | Cast iron for cylinder liner |
| FR2944284A1 (en) | 2009-04-14 | 2010-10-15 | Sanofi Aventis | N- (7-AZA-BICYCLO) 2.2.1! HEPT-1-YL) -LARYL-METHYL DERIVATIVES -BENZAMIDE, THEIR PREPARATION AND THEIR THERAPEUTIC APPLICATION |
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2014
- 2014-10-16 KR KR1020140139790A patent/KR20160045182A/en not_active Application Discontinuation
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- 2015-01-09 JP JP2015003520A patent/JP2016079498A/en active Pending
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- 2015-03-09 CN CN201510103667.9A patent/CN106032560A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115725891A (en) * | 2021-08-31 | 2023-03-03 | 通用汽车环球科技运作有限责任公司 | High modulus, high strength and low alloy gray cast iron for cylinder liners and automotive applications |
| CN115725891B (en) * | 2021-08-31 | 2023-11-21 | 通用汽车环球科技运作有限责任公司 | High modulus, high strength and low alloy gray cast iron for cylinder liner and automotive applications |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20160045182A (en) | 2016-04-27 |
| JP2016079498A (en) | 2016-05-16 |
| US20160108503A1 (en) | 2016-04-21 |
| DE102015204244A1 (en) | 2016-04-21 |
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Application publication date: 20161019 |