CN208071785U - A kind of high intensity spheroidal graphite brake disc and its casting mould - Google Patents
A kind of high intensity spheroidal graphite brake disc and its casting mould Download PDFInfo
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- CN208071785U CN208071785U CN201820239326.3U CN201820239326U CN208071785U CN 208071785 U CN208071785 U CN 208071785U CN 201820239326 U CN201820239326 U CN 201820239326U CN 208071785 U CN208071785 U CN 208071785U
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Abstract
A kind of high intensity spheroidal graphite brake disc and its casting mould,Including running gate system,Upper external model,Sand core,Lower external model,The upper external model,Lower external model by sand core be interposed in and form casting cavity,The running gate system includes the main sprue gate of cavity connection,Main running channel,Secondary cast gate,The main running channel stage casing is equipped with main sprue gate,The main running channel both ends are connect with the cross gate perpendicular to main running channel respectively,The cross gate both ends are equipped with secondary cast gate,The pair cast gate is connect with sprue,The sprue sequentially runs through the centre bore of upper external model,Sand core centre bore is arrived to the centre bore of lower external model,The sprue is equipped with upper annular stopper noz(zle) close to the position of sand core centre bore,Stopper noz(zle) is connected to the casting cavity of upper external model in order,The bottom of sprue is equipped with lower stopper noz(zle),Lower stopper noz(zle) is enabled to be connected to the casting cavity of lower external model.The utility model method has simple for process, moulding convenience, productivity height, the high advantage of product qualification rate.
Description
Technical field
The utility model is related to Mold Making technique, especially a kind of high intensity spheroidal graphite brake disc and its casting mould.
Background technology
Brake disc is vital part in brake system of car, is assembled together with wheel hub, by being done with brake lining
Friction generates huge frictional force, reduces vehicle wheel rotational speed to retarding braking.When running at high speed, automobile emergency brake brake
Disk bears huge abrasion, and the quality of quality directly affects the security performance of braking quality and vehicle.
In the production process of spheroidal graphite cast-iron brake disc, after heat treatment, impeller blasting or machining can be found often
Diameter is about 0.5-3mm, and shape is spherical, ellipticity or Pinhole-shaped inner wall smooth hole, these holes are generally in casting
2-3mm is distributed under epidermis, and here it is so-called subcutaneous blowholes.The tension for being formed as the surface of iron liquid containing magnesium of subcutaneous blowhole
Greatly, it is easy to form oxidation film, on hindering bubbing and the discharge for invading gas to have certain influence, these gases are stranded in skin for this
Under will form stomata.In addition, spheroidal graphite cast-iron mushy freezing feature makes gas passage more early be blocked, it can also promote subcutaneous blowhole
The formation of defect.
Existing mould process, using side into casting by the way of molten iron, product must expect that rate is low, cost of idleness,
Waste of energy.Using side into molten iron, brake lining surrounding cannot accomplish molten iron cooled and solidified simultaneously, form the big office of temperature difference
Face, it is big so as to cause the whole circle hardness deviation of brake lining of brake disc.
Utility model content
The purpose of this utility model is to provide a kind of high intensity spheroidal graphite brake disc and its casting moulds, to solve the above-mentioned back of the body
The problem of being proposed in scape technology.
To achieve the above object, the utility model provides the following technical solutions：A kind of high intensity spheroidal graphite brake disc, by following
Raw material is made by the weight proportion：C3.5~3.8%, Si3.0~3.3%, Mn0.5~0.6%, Nb0.03~0.05%,
Cr0.2~0.35%, Cu0.1~0.2%, Mo0.05~0.07%, core-spun yarn 0.2~0.25%, surplus is for iron and unavoidably
Impurity；
The core-spun yarn includes carbon steel crust and powdery inner core, and the inner core presses the quality percentage by following chemical components
Than being made：Ca15~20%, Si25~30%, high-magnesium aluminum alloy 11~15%, wherein Mg：Al is 2:（0.7~1）, Ti0.7~
1.2%, Ce0.9~1.2%, La0.7~1.0%, Zr2.2~3.0%, V0.35~0.5%, Cu1.2~1.5%, Ba0.5~
0.8%, surplus is iron and inevitable impurity；Molten iron is entered by running gate system by casting mould sprue gate, is poured by master
Road is flowing into its underpart cross gate, then is entering each cast gate by cross gate, is poured by the casting cavity of the upward external model of sprue
Molten iron is noted, then is stopped after molten iron occur in geat and riser to be poured by the casting type intracavitary pouring molten iron of the downward external model of sprue
It only casts, the form removal after its cooling removes the attachment and burr on casting, modifies after size up to high intensity brake disc.
Carbon (C)：In the present invention, as described later, since Si contents are set to height, preferred C3.5~3.8%
Range.
Silicon (Si)：Si has the effect of the ferritizing of the graphitization of C and matrix.The Si contents of common spheroidal graphite cast-iron are
2.5% or so.In the present invention, Si contents are 3.0~3.3%.Further increase oxidative resistance.
Manganese (Mn)：Mn is to keep its innoxious to fix the inevitable impurity i.e. S of material in the form of MnS
Required element.
Niobium (Nb)：Nb is to improve the tensile strength under high temperature by forming fine Carbide Precipitation in the base and bend
Take the element of stress.In the present invention, Nb0.03~0.05% is added.When Nb is more containing quantitative change, the ductility of cast iron is damaged,
And Nb is that carbide generates tendency by force and interferes the element of the spheroidizing of C, and keeps the carbide size in matrix coarse.
Chromium (Cr)：Cr is the element for improving the oxidative resistance under high temperature.In the present invention, add Cr0.2~
0.35%.When Cr is more containing quantitative change, the ductility of cast iron is damaged.
Copper（Cu）：The content for controlling copper, to improve hardening break tendency.In the present invention, copper contains
Amount is 0.1~0.2%.
Molybdenum (Mo)：Mo is the element for improving tensile strength and yield stress under high temperature in matrix by being fused to admittedly.Mo
It is combined into raw carbide with C, hardness rises and ductility reduces.In order not to damage machinability, in the present invention, addition
Mo0.05~0.07%.
The utility model is added with alloy form in core-spun yarn by reasonably being designed chemical composition, by Mg, Al,
Slow down fierce splash when individually adding magnesium, magnesium has significant desulfidation in molten iron.Magnesium is dominant element, one side of rare earth metal
Face can promote spheroidization of graphite, on the other hand overcome the influence of sulphur and impurity element to ensure that nodularization is also necessary, allow iron liquid
In the nucleus not activated grown up, as a result increase nucleus quantity total in iron liquid.Ti, height is added using core-spun yarn simultaneously
The microalloy elements such as magnesium alloy, Ca can refine the graphite form of spheroidal graphite cast-iron, than the fine microstructures of plain cast iron, uniform, cause
It is close, brake disc mechanical property and corrosion resistance are greatly improved, etch resistant properties improve 80% or more.
A kind of casting mould of high intensity spheroidal graphite brake disc, including running gate system, upper external model, sand core, lower external model, institute
State external model, lower external model by sand core be interposed in and form casting cavity, the running gate system includes what cavity connected
Main sprue gate, main running channel, secondary cast gate, the main running channel stage casing are equipped with main sprue gate, the main running channel both ends respectively with perpendicular to
The cross gate of main running channel connects, and the cross gate both ends are equipped with secondary cast gate, and the pair cast gate is connect with sprue, the sprue
Centre bore, the sand core centre bore for sequentially running through upper external model are arrived to the centre bore of lower external model, and the sprue is close to sand core
The position of centre bore is equipped with upper annular stopper noz(zle), and stopper noz(zle) is connected to the casting cavity of upper external model in order, the bottom of sprue
Equipped with lower stopper noz(zle), lower stopper noz(zle) is enabled to be connected to the casting cavity of lower external model.
Preferably, the sprue is equipped with expansion segment and contraction section, expansion segment bottom is equipped with main filter.
Preferably, the annular stopper noz(zle) is equipped with ring-shaped pottery filter, ring-shaped pottery filter inner side and outer side
It is outwardly convex.
The utility model reduces non-metallic inclusion and slag, controls trace harmful elements sulphur in furnace charge, manganese, phosphorus and contains
Amount so that the thin-wall nodular cast iron part abnormal nodularizing phenomenon produced using the casting method of the utility model is eliminated, decaying spheroidisation,
Subcutaneous blowhole rejection rate levels off to zero.
The utility model method has simple for process, moulding convenience, productivity height, the high advantage of product qualification rate.Its sand
Sand core is added in mould, casting is molded jointly by sand mo(u)ld and sand core；Running gate system is located at sand core internal, improves existing cast system
System is normally at the traditional method of external mold.High temperature liquid iron immediately enters position after the sprue cup that casting machine is poured into sand mo(u)ld top
In the ceramic filter energy purifying molten iron in the sprue in sand core, sprue, molten iron is entered by ceramic filter in sand core
Heart hole enters core cavity within the scope of 360 °, once can cast to form two pieces product, therefore improve production efficiency.Drop
Low cost reduces energy consumption；The whole circle difference of hardness of brake lining is reduced, and obtains the product of requirements at the higher level.
Description of the drawings
Fig. 1 is the structural schematic diagram of the prior art,
Fig. 2 is the structural schematic diagram of the utility model；
Fig. 3 is the sectional view of the sprue of the utility model；
Fig. 4 is the enlarged drawing at A in Fig. 3.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
A kind of high intensity spheroidal graphite brake disc casting mould, it is characterized in that using following methods：Molten iron is passed through into running gate system
Entered by casting mould sprue gate, its underpart cross gate is being flowed by main running channel, then each cast gate is entered by cross gate, passed through
The casting cavity pouring molten iron of the upward external model of sprue, then iron is poured into a mould by the casting type intracavitary of the downward external model of sprue
Water after molten iron occur in geat and riser to be poured, stops casting, and the form removal after its cooling removes the attachment and burr on casting,
Up to high intensity brake disc after finishing size.
Please refer to Fig.1-4, the casting mould of high intensity brake disc, including running gate system 1, upper external model 62, sand core 6, under
External model 64, the upper external model 62, lower external model 64 by sand core 6 be interposed in and form casting cavity, the cast system
System includes the main sprue gate 11 of cavity connection, main running channel 2, secondary cast gate 3, and 2 stage casing of main running channel is described equipped with main sprue gate 11
Main running channel both ends are connect with the cross gate 21 perpendicular to main running channel 2 respectively, and 21 both ends of the cross gate are equipped with secondary cast gate 3, described
Secondary cast gate is connect with sprue 4, and the sprue 4 is equipped with expansion segment 41 and contraction section 42, and 41 bottom of expansion segment is equipped with main mistake
Filter disc 43.Contraction section coordinates with expansion segment, can adjust the flow rate of molten iron, and molten iron is allowed to be flowed in mold by best pulsation,
The expansion segment on main filter 43 is conducive to the diffusion of slag simultaneously.
Centre bore 61, the sand core centre bore that sprue 4 sequentially runs through upper external model are arrived to the centre bore 63 of lower external model,
The sprue is equipped with upper annular stopper noz(zle) 65 close to the position of sand core centre bore, and annular stopper noz(zle) and upper external model pours in orders
Mould cavity 61 is connected to, and the bottom of sprue is equipped with lower stopper noz(zle) 66, and lower stopper noz(zle) 66 is enabled to be connected to the casting cavity of lower external model.
The sand core 6 can be combined by the identical sand core model correspondence of two block structures, and annular stopper noz(zle) is equipped with ring
Shape ceramic filter 7,7 inner side and outer side of ring-shaped pottery filter are outwardly convex.Molten iron can be slowed down to casting cavity and mistake
The impact of filter material material, while impurity can be enabled to float, improve filter effect.
Spheroidal graphite cast-iron brake disc casting is carried out using above-mentioned casting mould.
Embodiment 1
A kind of spheroidal graphite cast-iron brake disc is made of following raw material by the weight proportion：C3.5%, Si3.0%, Mn0.5%,
Nb0.05%, Cr0.35%, Cu0.2%, Mo0.05%, core-spun yarn 0.2%, surplus are iron and inevitable impurity；
The core-spun yarn includes carbon steel crust and powdery inner core, and the inner core presses the quality percentage by following chemical components
Than being made：Ca15%, Si25%, high-magnesium aluminum alloy 11%, wherein Mg：Al is 2:1, Ti0.7%, Ce0.9%, La0.7%,
Zr3.0%, V0.5%, Cu1.2%, Ba0.8%, surplus are iron and inevitable impurity.The molten iron of above-mentioned spheroidal graphite cast-iron is passed through
It crosses running gate system by die casting mouth to be entered, its underpart cross gate is being flowed by main running channel, then each pour is entered by cross gate
Mouthful, pass through the casting cavity pouring molten iron of the upward external model of sprue, then the casting type intracavitary by the downward external model of sprue
Pouring molten iron after molten iron occur in geat and riser to be poured, stops casting, and the form removal after its cooling removes the attachment on casting
And burr, it modifies after size up to high intensity brake disc.
Embodiment 2
A kind of spheroidal graphite cast-iron brake disc is made of following raw material by the weight proportion：C3.6%, Si3.2%, Mn0.5%,
Nb0.04%, Cr0.3%, Cu0.2%, Mo0.06%, core-spun yarn 0.23%, surplus are iron and inevitable impurity；
The core-spun yarn includes carbon steel crust and powdery inner core, and the inner core presses the quality percentage by following chemical components
Than being made：Ca18%, Si29%, high-magnesium aluminum alloy 12%, wherein Mg：Al is 2:0.9, Ti1.0%, Ce1.1%, La0.9%,
Zr2.6%, V0.42%, Cu1.3%, Ba0.7%, surplus are iron and inevitable impurity.
The molten iron of above-mentioned spheroidal graphite cast-iron is entered by running gate system by die casting mouth, it is being flowed by main running channel
Lower part cross gate, then each cast gate is entered by cross gate, by the casting cavity pouring molten iron of the upward external model of sprue, then lead to
The casting type intracavitary pouring molten iron for crossing the downward external model of sprue after molten iron occur in geat and riser to be poured, stops casting, waits for it
Form removal after cooling removes attachment and burr on casting, modifies after size up to high intensity brake disc.
Embodiment 3
A kind of spheroidal graphite cast-iron brake disc is made of following raw material by the weight proportion：C3.8%, Si3.3%, Mn0.6%,
Nb0.03%, Cr0.2%, Cu0.1%, Mo0.07%, core-spun yarn 0.2~0.25%, surplus are iron and inevitable impurity；
The core-spun yarn includes carbon steel crust and powdery inner core, and the inner core presses the quality percentage by following chemical components
Than being made：Ca20%, Si30%, high-magnesium aluminum alloy 15%, wherein Mg：Al is 2:0.7, Ti1.2%, Ce1.2%, La1.0%,
Zr2.2%, V0.35%, Cu1.5%, Ba0.5%, surplus are iron and inevitable impurity.
The molten iron of above-mentioned spheroidal graphite cast-iron is entered by running gate system by die casting mouth, it is being flowed by main running channel
Lower part cross gate, then each cast gate is entered by cross gate, by the casting cavity pouring molten iron of the upward external model of sprue, then lead to
The casting type intracavitary pouring molten iron for crossing the downward external model of sprue after molten iron occur in geat and riser to be poured, stops casting, waits for it
Form removal after cooling removes attachment and burr on casting, modifies after size up to high intensity brake disc.
Verification to the utility model technique advance：
Comparative example 1：Using any one formula of the utility model embodiment 1-3, using prior art and mold, side into
Molten iron（As shown in Figure 1）, 272*22 brake discs are cast, it is 65% to obtain material rate, the whole circle difference of hardness 25HB of brake lining（Detection 144
Point）.
Experimental example：Using any one formula of the utility model embodiment 1-3, cast according to the utility model technique and mold
272*22 brake discs are made, it is 78% to obtain material rate, the whole circle difference of hardness 11HB of brake lining（Detect 144 points）.
Its testing result is as shown in table 1：
The verification advanced to the utility model spheroidal graphite cast-iron formula：
Comparative example 2：The existing commercially available spheroidal graphite cast-iron brake disc of certain Korean company.
We carry out other indexs of correlation of the spheroidal graphite cast-iron brake disc prepared in comparative example 2 and above-described embodiment 1-3
Test, performance are as shown in table 2 below：
By upper table it is found that the tensile strength of embodiment 1-3 spheroidal graphite cast-iron brake discs is high, hardness is high, number of graphite ball is more, ball
Black roundness is high, uniformly, Graphite Distribution high uniformity, more than tensile strength 600Mpa, elongation percentage still ensure that 8% with
On；Etch resistant properties improve 80% or more.The material rate that obtains of the utility model products obtained therefrom is better than prior art, and difference of hardness is better than existing
There is technique.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing in the equivalent requirements of the claims will be fallen
All changes in justice and range are embraced therein.Any reference numeral in claim should not be considered as limitation
Involved claim.
Claims (3)
1. a kind of high intensity spheroidal graphite brake disc and its casting mould, including running gate system, upper external model, sand core, lower external model,
Be characterized in that the upper external model, lower external model by sand core be interposed in and form casting cavity, the running gate system includes
The main sprue gate of cavity connection, main running channel, secondary cast gate, the main running channel stage casing are equipped with main sprue gate, the main running channel both ends point
It not being connect with the cross gate perpendicular to main running channel, the cross gate both ends are equipped with secondary cast gate, and the pair cast gate is connect with sprue,
Centre bore, the sand core centre bore that the sprue sequentially runs through upper external model are arrived to the centre bore of lower external model, described directly to pour
Road is equipped with upper annular stopper noz(zle) close to the position of sand core centre bore, and stopper noz(zle) is connected to the casting cavity of upper external model in order, directly
The bottom of running channel is equipped with lower stopper noz(zle), and lower stopper noz(zle) is enabled to be connected to the casting cavity of lower external model.
2. a kind of high intensity spheroidal graphite brake disc according to claim 1 and its casting mould, it is characterised in that described directly to pour
Road is equipped with expansion segment and contraction section, and expansion segment bottom is equipped with main filter.
3. a kind of high intensity spheroidal graphite brake disc according to claim 1 and its casting mould, it is characterised in that the annular
Stopper noz(zle) is equipped with ring-shaped pottery filter, and ring-shaped pottery filter inner side and outer side is outwardly convex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820239326.3U CN208071785U (en) | 2018-02-10 | 2018-02-10 | A kind of high intensity spheroidal graphite brake disc and its casting mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820239326.3U CN208071785U (en) | 2018-02-10 | 2018-02-10 | A kind of high intensity spheroidal graphite brake disc and its casting mould |
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| Publication Number | Publication Date |
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| CN208071785U true CN208071785U (en) | 2018-11-09 |
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| CN201820239326.3U Active CN208071785U (en) | 2018-02-10 | 2018-02-10 | A kind of high intensity spheroidal graphite brake disc and its casting mould |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108160935A (en) * | 2018-02-10 | 2018-06-15 | 富士和机械工业（湖北）有限公司 | A kind of casting technique of high intensity brake disc |
-
2018
- 2018-02-10 CN CN201820239326.3U patent/CN208071785U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108160935A (en) * | 2018-02-10 | 2018-06-15 | 富士和机械工业（湖北）有限公司 | A kind of casting technique of high intensity brake disc |
| CN108160935B (en) * | 2018-02-10 | 2024-01-30 | 富士和机械工业（湖北）有限公司 | Casting process of high-strength brake disc |
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