CN103060664A - Casting technology for grey cast iron material of brake disc - Google Patents
Casting technology for grey cast iron material of brake disc Download PDFInfo
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- CN103060664A CN103060664A CN 201110318472 CN201110318472A CN103060664A CN 103060664 A CN103060664 A CN 103060664A CN 201110318472 CN201110318472 CN 201110318472 CN 201110318472 A CN201110318472 A CN 201110318472A CN 103060664 A CN103060664 A CN 103060664A
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Abstract
The invention relates to a casting technology for a grey cast iron material of a brake disc, and relates to the casting technology, which comprises the following steps: A) burdening, in the step, a cast pig iron, a recirculated iron, a low carbon steel scrap and a manganese silicon copper alloy material are taken as raw materials with the mass percentages of 3.8-4.2% of carbon, 3.0-3.4% of silicon, 0.8-1.2% of manganese, less than or equal to 0.6% of copper, 0.07-0.15% of phosphorus, less than or equal to 0.1% of sulphur, 45-55% of low carbon steel scrap and the balance of iron; B) smelting, which comprises a step of igniting, a step of feeding, a step of heating, a step of doing a speedy bath analysis, a step of adjusting the components and a step of taking out; C) casting; and D) preparing the grey cast iron material of the brake disc. The invention employs high scrap ratio, high silicon-carbon ratio and high-temperature heating for smelting, various kinds of crystalline grains can be refined and uniformized in internal tissue of the castings, the phenomena of loosening and air hole in internal tissue of a blank can be avoided, and the product percent of pass is increased.
Description
Technical field
The present invention relates to a kind of casting technique, particularly a kind of casting technique of retarding disc grey cast iron material.
Background technology
Retarding disc is widely used in the breaking system of various vehicles, and its constructional feature is frivolous, and thickness does not wait.The foundry goods hair of existing retarding disc is bad easily to produce the phenomenon of loose, pore, distortion in casting process, locate 90 ° of retarding disc corners particularly that the large-area appearance of interior tissue is loose, the phenomenon of pore is especially serious, the product percent of pass of producing is only about 40%, directly seriously influenced production, improve production cost, also affected the economic benefit of enterprise simultaneously.Therefore, the high strength casting technique of manufacturer's Reusability routine of existing retarding disc foundry goods solves this problem, but does not all obtain preferably effect.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of casting technique of retarding disc grey cast iron material of anti-convention is provided, is prone to the weak point of the phenomenons such as loose, pore, distortion to solve above-mentioned retarding disc foundry goods.
The technical scheme that solves the problems of the technologies described above is: a kind of casting technique of retarding disc grey cast iron material, and this technique may further comprise the steps:
A, batching: adopting coke, foundry iron, foundry return, low-carbon waste steel, manganese Si-Cu alloy material is starting material, and be by mass percentage: carbon 3.8～4.2%, silicon 3.0～3.4%, manganese 0.8～1.2%, copper≤0.6%, phosphorus 0.07～0.15%, sulphur≤0.1%, low-carbon waste steel 45～55%, iron surplus are prepared burden;
B, melting: starting material are dropped into carry out melting in the smelting furnace, melting technology is as follows:
B.1, igniting;
B.2, feed intake: successively coke, foundry iron, foundry return, low-carbon waste steel, manganese Si-Cu alloy material are dropped in the smelting furnace;
B.3, heating: add hot melting furnace, make the whole molten molten iron solution that are of starting material in the smelting furnace;
B.4, both analysis: the temperature of smelting furnace is risen to 1400 ℃～1460 ℃, get the molten iron liquor sample and do both analysis;
B.5, composition adjustment: carry out the adjustment of stokehold chemical ingredients according to the result after analyzing by the composition of retarding disc grey cast iron material, the composition of described retarding disc grey cast iron material is as follows by mass percentage:
Carbon: 3.20～3.42%, silicon: 2.0～2.4%, manganese: 0.71～0.75%, copper≤0.1%, phosphorus≤0.1%, sulphur 0.72～0.91%, surplus is iron;
B.6, come out of the stove: the temperature of smelting furnace is risen to 1480 ℃～1500 ℃ high temperature, come out of the stove;
C, cast: when temperature is 1460 ℃～1480 ℃, begin cast, be no more than 8 minutes the duration of pouring;
D, make retarding disc grey cast iron material, the composition of this retarding disc grey cast iron material is by mass percentage:
Carbon: 3.20～3.42%, silicon: 2.0～2.4%, manganese: 0.71～0.75%, copper≤0.1%, phosphorus≤0.1%, sulphur: 0.72～0.91%, surplus is iron.
Further technical scheme of the present invention is: in the B.4 both analysis operation of described step B, concrete steps are as follows:
B.4.1, the temperature of smelting furnace is risen to 1400 ℃～1460 ℃, get the molten iron liquor sample and do both analysis, the chemical ingredients of check carbon and silicon;
B.4.2, getting an amount of molten iron liquor sample is cast in the spectrum samples mould again, the molten iron liquor sample obtains the analytical sample of complete chill through Quench in the spectrum samples mould, carries out composition analysis by spectrograph, after obtaining the result, in order to further adjust again the chemical ingredients of molten iron solution.
Again further technical scheme of the present invention is: described smelting furnace is soaring blast furnace.
Further technical scheme of the present invention is: the tissue signature of the described retarding disc grey cast iron material that makes is: perlite 90%～95%+ graphite (A3～5)+a small amount of ferrite; Its mechanical property characteristics is: tensile strength 〉=255N/mm
2, hardness 〉=187HB.
Because adopt technique scheme, the casting technique of the present invention's retarding disc grey cast iron material compared with prior art has following beneficial effect:
1, can avoid the phenomenons such as loosening appears in the blank interior tissue, pore:
Because the constructional feature that the present invention is frivolous according to retarding disc and thickness does not wait, be bold in innovation, in melting technology, use the method for anti-convention, namely be to adopt high scrap ratio 45～55%, high silicon-carbon ratio 0.8:1.1%, " three height " method that high melt is 1480～1500 ℃ is carried out melting, make the graphite size of foundry goods along with high scrap ratio, refinement has appearred in high silicon-carbon ratio and high melt, perlite reaches 90%～95%, the comparatively refinement of perlite eutectic cell, thereby make the inside and outside thickness grain refining of foundry goods interior tissue even, greatly improved the quality of product, it is loose to have avoided the blank interior tissue to occur, the phenomenons such as pore have reached the specification of quality of product.
2, greatly improved the qualification rate of product:
Because the present invention can make the inside and outside thickness grain refining of foundry goods interior tissue even by the melting method of " three height ", reduced internal stress, solved problem on deformation, product percent of pass is brought up to more than 95%, reach the product percent of pass that can not reach with the common process melting, greatly improved the qualification rate of product.
2, reduce production cost, improved economic benefit:
Because the present invention has reduced scrap rate, has reduced the material consumption of the production means, reduced production cost, thereby can increase economic efficiency, accelerate the development of enterprise, for a strength is offered as a tribute in the production of automotive industry.
Below, in conjunction with specific embodiments the technical characterictic of the casting technique of the present invention's retarding disc grey cast iron material is further described.
Specific embodiment
Embodiment one:
A kind of casting technique of retarding disc grey cast iron material, this technique may further comprise the steps:
A, batching: adopting coke, foundry iron, the similar runner bar, low-carbon waste steel, manganese Si-Cu alloy material of melting down is starting material, and be by mass percentage: carbon 3.8%, silicon 3.0%, manganese 0.8%, copper 0.3%, phosphorus 0.07%, sulphur 0.1%, low-carbon waste steel 45%, iron surplus are prepared burden;
B, melting: starting material are dropped into carry out melting in the smelting furnace, described smelting furnace is soaring blast furnace, and melting technology is as follows:
B.1, igniting;
B.2, feed intake: successively coke, foundry iron, foundry return, low-carbon waste steel, manganese Si-Cu alloy material are dropped in the smelting furnace;
B.3, heating: add hot melting furnace, make the whole molten molten iron solution that are of starting material in the smelting furnace;
B.4, both analysis: the temperature of smelting furnace is risen to 1400 ℃ ℃, get the molten iron liquor sample and do both analysis;
B.5, composition adjustment: carry out the adjustment of stokehold chemical ingredients according to the result after analyzing by the composition of retarding disc grey cast iron material, the composition of described retarding disc grey cast iron material is as follows by mass percentage:
Carbon: 3.2%, silicon: 2.0%, manganese: 0.71%, copper 0.1%, phosphorus 0.07%, sulphur 0.72%, surplus is iron;
B.6, come out of the stove: the temperature of smelting furnace is risen to 1480 ℃ of high temperature, come out of the stove;
C, cast: when temperature is 1460 ℃, begin cast, be no more than 8 minutes the duration of pouring;
D, make retarding disc grey cast iron material, the composition of this retarding disc grey cast iron material is by mass percentage:
Carbon: 3.2%, silicon: 2.0%, manganese: 0.71%, copper 0.1%, phosphorus 0.07%, sulphur 0.72%, surplus is iron;
In the B.4 both analysis operation of described step B, concrete steps are as follows:
B.4.1, the temperature of smelting furnace is risen to 1400 ℃, get the molten iron liquor sample and do both analysis, the chemical ingredients of check carbon and silicon;
B.4.2, getting an amount of molten iron liquor sample is cast in the spectrum samples mould again, the molten iron liquor sample obtains the analytical sample of complete chill through Quench in the spectrum samples mould, carries out composition analysis by spectrograph, after obtaining the result, in order to further adjust again the chemical ingredients of molten iron solution.
The described retarding disc grey cast iron material that makes is that the trade mark is the HT250 grey cast iron, and its tissue signature is: perlite 90%+ graphite (A3)+a small amount of ferrite; Its mechanical property characteristics is: tensile strength 〉=255N/mm
2, hardness 〉=187HB.
Embodiment two:
A kind of casting technique of retarding disc grey cast iron material, this technique may further comprise the steps:
A, batching: adopting coke, foundry iron, the similar runner bar, low-carbon waste steel, manganese Si-Cu alloy material of melting down is starting material, and be by mass percentage: carbon 4.0%, silicon 3.2%, manganese 1.0%, copper 0.5%, phosphorus 0.12%, sulphur 0.08%, low-carbon waste steel 50%, iron surplus are prepared burden;
B, melting: starting material are dropped into carry out melting in the smelting furnace, described smelting furnace is soaring blast furnace, and melting technology is as follows:
B.1, igniting;
B.2, feed intake: successively coke, foundry iron, foundry return, low-carbon waste steel, manganese Si-Cu alloy material are dropped in the smelting furnace;
B.3, heating: add hot melting furnace, make the whole molten molten iron solution that are of starting material in the smelting furnace;
B.4, both analysis: the temperature of smelting furnace is risen to 1430 ℃, get the molten iron liquor sample and do both analysis;
B.5, composition adjustment: carry out the adjustment of stokehold chemical ingredients according to the result after analyzing by the composition of retarding disc grey cast iron material, the composition of described retarding disc grey cast iron material is as follows by mass percentage:
Carbon: 3.31%, silicon: 2.2%, manganese: 0.72%, copper 0.1%, phosphorus 0.01%, sulphur 0.81%, surplus is iron;
B.6, come out of the stove: the temperature of smelting furnace is risen to 1490 ℃ of high temperature, come out of the stove;
C, cast: when temperature is 1470 ℃, begin cast, be no more than 8 minutes the duration of pouring;
D, make retarding disc grey cast iron material, the composition of this retarding disc grey cast iron material is by mass percentage:
Carbon: 3.31%, silicon: 2.2%, manganese: 0.72%, copper 0.1%, phosphorus 0.01%, sulphur 0.81%, surplus is iron.
In the B.4 both analysis operation of described step B, concrete steps are as follows:
B.4.1, the temperature of smelting furnace is risen to 1430 ℃, get the molten iron liquor sample and do both analysis, the chemical ingredients of check carbon and silicon;
B.4.2, getting an amount of molten iron liquor sample is cast in the spectrum samples mould again, the molten iron liquor sample obtains the analytical sample of complete chill through Quench in the spectrum samples mould, carries out composition analysis by spectrograph, after obtaining the result, in order to further adjust again the chemical ingredients of molten iron solution.
The described retarding disc grey cast iron material that makes is that the trade mark is the HT250 grey cast iron, and its tissue signature is: perlite 93%+ graphite (A4)+a small amount of ferrite; Its mechanical property characteristics is: tensile strength 〉=255N/mm
2, hardness 〉=187HB.
Embodiment three:
A kind of casting technique of retarding disc grey cast iron material, this technique may further comprise the steps:
A, batching: adopting coke, foundry iron, the similar runner bar, low-carbon waste steel, manganese Si-Cu alloy material of melting down is starting material, and be by mass percentage: carbon 4.2%, silicon 3.4%, manganese 1.2%, copper 0.6%, phosphorus 0.15%, sulphur 0.1%, low-carbon waste steel 55%, iron surplus are prepared burden;
B, melting: starting material are dropped into carry out melting in the smelting furnace, described smelting furnace is soaring blast furnace, and melting technology is as follows:
B.1, igniting;
B.2, feed intake: successively coke, foundry iron, foundry return, low-carbon waste steel, manganese Si-Cu alloy material are dropped in the smelting furnace;
B.3, heating: add hot melting furnace, make the whole molten molten iron solution that are of starting material in the smelting furnace;
B.4, both analysis: the temperature of smelting furnace is risen to 1460 ℃, get the molten iron liquor sample and do both analysis;
B.5, composition adjustment: carry out the adjustment of stokehold chemical ingredients according to the result after analyzing by the composition of retarding disc grey cast iron material, the composition of described retarding disc grey cast iron material is as follows by mass percentage:
Carbon: 3.42%, silicon: 2.4%, manganese: 0.75%, copper 0.1%, phosphorus 0.1%, sulphur 0.91%, surplus is iron;
B.6, come out of the stove: the temperature of smelting furnace is risen to 1500 ℃ of high temperature, come out of the stove;
C, cast: when temperature is 1480 ℃, begin cast, be no more than 8 minutes the duration of pouring;
D, make retarding disc grey cast iron material, the composition of this retarding disc grey cast iron material is by mass percentage:
Carbon: 3.42%, silicon: 2.4%, manganese: 0.75%, copper 0.1%, phosphorus 0.1%, sulphur: 0.91%, surplus is iron.
In the B.4 both analysis operation of described step B, concrete steps are as follows:
B.4.1, the temperature of smelting furnace is risen to 1460 ℃, get the molten iron liquor sample and do both analysis, the chemical ingredients of check carbon and silicon;
B.4.2, getting an amount of molten iron liquor sample is cast in the spectrum samples mould again, the molten iron liquor sample obtains the analytical sample of complete chill through Quench in the spectrum samples mould, carries out composition analysis by spectrograph, after obtaining the result, in order to further adjust again the chemical ingredients of molten iron solution.
The described retarding disc grey cast iron material that makes is that the trade mark is the HT250 grey cast iron, and its tissue signature is: perlite 95%+ graphite (A5)+a small amount of ferrite; Its mechanical property characteristics is: tensile strength 〉=255N/mm
2, hardness 〉=187HB.
As a kind of conversion of embodiment one～embodiment three, the described step B.4 furnace temperature in the both analysis can be arbitrary numerical value in 1400 ℃～1460 ℃.
As a kind of conversion of embodiment one～embodiment three, the furnace temperature during B.6 described step comes out of the stove also can be the arbitrary numerical value in 1480 ℃～1500 ℃.
As a kind of conversion of embodiment one～embodiment three, the temperature in the described step C cast can be the arbitrary numerical value in 1460 ℃～1480 ℃.
Embodiment four～embodiment ten
A kind of casting technique of retarding disc grey cast iron material, the detailed process of this casting technique is with embodiment one～embodiment three, institute's difference is: the by mass percentage to some extent conversion of composition of described raw material quality per-cent, the retarding disc grey cast iron material that makes, concrete transformation range sees attached list one.
Subordinate list one: the component proportions table look-up of raw material ratio and the retarding disc grey cast iron material that makes among embodiment four～embodiment ten
Claims (4)
1. the casting technique of a retarding disc grey cast iron material, it is characterized in that: this technique may further comprise the steps:
A, batching: adopting coke, foundry iron, foundry return, low-carbon waste steel, manganese Si-Cu alloy material is starting material, and be by mass percentage: carbon 3.8～4.2%, silicon 3.0～3.4%, manganese 0.8～1.2%, copper≤0.6%, phosphorus 0.07～0.15%, sulphur≤0.1%, low-carbon waste steel 45～55%, iron surplus are prepared burden;
B, melting: starting material are dropped into carry out melting in the smelting furnace, melting technology is as follows:
B.1, igniting;
B.2, feed intake: successively coke, foundry iron, foundry return, low-carbon waste steel, manganese Si-Cu alloy material are dropped in the smelting furnace;
B.3, heating: add hot melting furnace, make the whole molten molten iron solution that are of starting material in the smelting furnace;
B.4, both analysis: the temperature of smelting furnace is risen to 1400 ℃～1460 ℃, get the molten iron liquor sample and do both analysis;
B.5, composition adjustment: carry out the adjustment of stokehold chemical ingredients according to the result after analyzing by the composition of retarding disc grey cast iron material, the composition of described retarding disc grey cast iron material is as follows by mass percentage:
Carbon: 3.20～3.42%, silicon: 2.0～2.4%, manganese: 0.71～0.75%, copper≤0.1%, phosphorus≤0.1%, sulphur 0.72～0.91%, surplus is iron;
B.6, come out of the stove: the temperature of smelting furnace is risen to 1480 ℃～1500 ℃ high temperature, come out of the stove;
C, cast: when temperature is 1460 ℃～1480 ℃, begin cast, be no more than 8 minutes the duration of pouring;
D, make retarding disc grey cast iron material, the composition of this retarding disc grey cast iron material is by mass percentage:
Carbon: 3.20～3.42%, silicon: 2.0～2.4%, manganese: 0.71～0.75%, copper≤0.1%, phosphorus≤0.1%, sulphur: 0.72～0.91%, surplus is iron.
2. the casting technique of retarding disc grey cast iron material according to claim 1, it is characterized in that: in the B.4 both analysis operation of described step B, concrete steps are as follows:
B.4.1, the temperature of smelting furnace is risen to 1400 ℃～1460 ℃, get the molten iron liquor sample and do both analysis, the chemical ingredients of check carbon and silicon;
B.4.2, getting an amount of molten iron liquor sample is cast in the spectrum samples mould again, the molten iron liquor sample obtains the analytical sample of complete chill through Quench in the spectrum samples mould, carries out composition analysis by spectrograph, after obtaining the result, in order to further adjust again the chemical ingredients of molten iron solution.
3. the casting technique of retarding disc grey cast iron material according to claim 1, it is characterized in that: described smelting furnace is soaring blast furnace.
4. according to claim 1 and 2 or the casting technique of 3 described retarding disc grey cast iron materials, it is characterized in that: the tissue signature of the described retarding disc grey cast iron material that makes is: perlite 90%～95%+ graphite (A3～5)+a small amount of ferrite; Its mechanical property characteristics is: tensile strength 〉=255N/mm
2, hardness 〉=187HB.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110318472 CN103060664A (en) | 2011-10-19 | 2011-10-19 | Casting technology for grey cast iron material of brake disc |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110318472 CN103060664A (en) | 2011-10-19 | 2011-10-19 | Casting technology for grey cast iron material of brake disc |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834853A (en) * | 2014-03-19 | 2014-06-04 | 中国重汽集团济南动力有限公司 | Casting material of brake disc of disc brake and processing technique of brake disc |
| CN106555106A (en) * | 2016-10-13 | 2017-04-05 | 合肥元丰汽车制动系统有限公司 | A kind of Wear-resistant, high-temperature resistant alloy cast iron brake disc preparation technology |
| CN108467986A (en) * | 2018-03-02 | 2018-08-31 | 江苏腾达缸泵机械股份有限公司 | A kind of method of smelting of mold cylinder iron |
| CN110129509A (en) * | 2019-05-16 | 2019-08-16 | 芜湖久弘重工股份有限公司 | The electro-smelting technology of lathe casting is produced under a kind of high carbon conditions |
| WO2024069251A1 (en) * | 2022-09-29 | 2024-04-04 | Tata Motors Limited | A high strength wear and corrosion resistant grey cast iron and a method of manufacturing thereof |
-
2011
- 2011-10-19 CN CN 201110318472 patent/CN103060664A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834853A (en) * | 2014-03-19 | 2014-06-04 | 中国重汽集团济南动力有限公司 | Casting material of brake disc of disc brake and processing technique of brake disc |
| CN103834853B (en) * | 2014-03-19 | 2016-04-13 | 中国重汽集团济南动力有限公司 | A kind of casting material of brake disk and the complete processing of retarding disc |
| CN106555106A (en) * | 2016-10-13 | 2017-04-05 | 合肥元丰汽车制动系统有限公司 | A kind of Wear-resistant, high-temperature resistant alloy cast iron brake disc preparation technology |
| CN108467986A (en) * | 2018-03-02 | 2018-08-31 | 江苏腾达缸泵机械股份有限公司 | A kind of method of smelting of mold cylinder iron |
| CN110129509A (en) * | 2019-05-16 | 2019-08-16 | 芜湖久弘重工股份有限公司 | The electro-smelting technology of lathe casting is produced under a kind of high carbon conditions |
| WO2024069251A1 (en) * | 2022-09-29 | 2024-04-04 | Tata Motors Limited | A high strength wear and corrosion resistant grey cast iron and a method of manufacturing thereof |
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Application publication date: 20130424 |