CN104226912B - A kind of casting technique of platen - Google Patents
A kind of casting technique of platen Download PDFInfo
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- CN104226912B CN104226912B CN201410430808.3A CN201410430808A CN104226912B CN 104226912 B CN104226912 B CN 104226912B CN 201410430808 A CN201410430808 A CN 201410430808A CN 104226912 B CN104226912 B CN 104226912B
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Abstract
The invention discloses the casting technique of a kind of platen.Technique includes following step: (1) furnace charge melting: be that 3:1 is placed in melting in electric furnace by steel scrap and the pig iron according to weight ratio, melting 2 3h under conditions of temperature is 1,550 1580 DEG C；(2) moulding: require design molding according to drawing of rough casting paper size, mould includes mold and lower mold, and mold and lower mold are assembled into core shooter, by core shooter by full for molding sand pressure model, molding sand is heating and curing after molding under the conditions of temperature is 80 100 DEG C, standby；(3) cast: by the ferrum liquid in step (1) under the conditions of temperature is 1,320 1350 DEG C, adds inovulant, is poured in the moulding in step (2), and the duration of pouring is 2 4min, after casting complete, is cooled to 300 400 DEG C and takes out platen；(4) heat treatment.
Description
Technical field
The present invention relates to the casting technique of a kind of platen, belong to foundary industry technical field.
Background technology
Platen is a rosette, is the parts of automobile clutch, and normal state is that same clutch disc is combined closely, and becomes an entirety, rotates with electromotor, and power is passed to change speed gear box.
In order to ensure the performance requirement of automobile platen, the chemical composition of automobile platen foundry goods, metallographic structure, graphite form, tensile strength, hardness etc. all there are more strict requirements.Due to almost nil containing the intensity of flake graphite, plasticity, toughness in foundry goods in actual production, there is graphite place to be equivalent to there is hole, micro-crack, it has not only broken up the seriality of matrix, decrease matrix stress effective area, and at graphite flake tip, form stress concentrate, make material form brittle fracture.The quantity of graphite flake is the most, and size is the thickest, is distributed the most uneven, and tensile strength and the plasticity of cast iron are the lowest, and wherein matrix is isolated effect maximum by C type graphite, next to that D+E type graphite.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that the casting pressure plates technique that a kind of qualification rate is high.
The present invention is achieved through the following technical solutions:
A kind of casting technique of platen, including following step:
(1) furnace charge melting: be that 3:1 is placed in melting in electric furnace according to weight ratio by steel scrap and the pig iron, melting 2-3h under conditions of temperature is 1550-1580 DEG C, in the ferrum liquid obtained, sulfur content is less than 0.02%, phosphorus content is less than 0.02%, copper content is less than 0.25%, and phosphorus content is 0.15-0.18%, silicon content 0.2-0.25%, manganese content 0.35-0.45%, nickel content 0.25-0.35%；
(2) moulding: require design molding according to drawing of rough casting paper size, mould includes mold and lower mold, and mold and lower mold are assembled into core shooter, by core shooter by full for molding sand pressure model, molding sand is heating and curing after molding under the conditions of temperature is 80-100 DEG C, standby；
(3) cast: by the ferrum liquid in step (1) under the conditions of temperature is 1320-1350 DEG C, adds inovulant, is poured in the moulding in step (2), and the duration of pouring is 2-4min, after casting complete, is cooled to 300-400 DEG C and takes out platen；
(4) heat treatment: platen is incubated under the conditions of 300-400 DEG C 50-80min, it is warming up to 860-900 DEG C, insulation 120-150min, is cooled to 350-380 DEG C, is incubated 80-100min, rise again again to 650-680 DEG C, insulation 100-120min, fast cooling, to 300-400 DEG C, keeps 50-80min, natural cooling, obtains finished product platen after polishing.
The casting technique of described a kind of platen, described molding sand is made up of the raw material of following parts by weight: silica sand 100 parts, acrylic resin 10-12 part, tertiary amine 1-1.5 part, kieselguhr 6-9 part, silane coupler 0.5-1.2 part and water 10-15 part.
The casting technique of described a kind of platen, in described silica sand, the content of silicon dioxide is 88-92%.
The casting technique of described a kind of platen, described molding sand through the following steps that obtain: after silica sand and water mix homogeneously, be slowly added to acrylic resin and kieselguhr, be stirring evenly and then adding into silane coupler, it is eventually adding tertiary amine, quickly obtains molding sand after stirring mixing 1-3min.
The casting technique of described a kind of platen, the addition of described inovulant is the 0.15-0.2% of ferrum liquid weight.
The casting technique of described a kind of platen, described inovulant is silicon strontium inovulant.
The beneficial effect that the present invention is reached:
The casting pressure plates technique of the present invention is simple, use upper/lower die then by penetrating the moulding that sand machine obtains, it is easier to reach cast average, after casting complete, carry out heat treatment, change the crystal structure of platen, improve the hardness of platen, exist without C type graphite in the platen tissue obtained, D+E type content of graphite therein is less than 5%, the content of pearlite is more than 95%, the platen tensile strength obtained is 220-250Mpa, and hardness is 210-230HB, graphite a length of 4-6 level.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.Following example are only used for clearly illustrating technical scheme, and can not limit the scope of the invention with this.
Embodiment 1
In the present embodiment, the casting technique of a kind of platen, including following step:
(1) furnace charge melting: be that 3:1 is placed in melting in electric furnace according to weight ratio by steel scrap and the pig iron, melting 2h under conditions of temperature is 1580 DEG C, in the ferrum liquid obtained, sulfur content is less than 0.02%, phosphorus content is less than 0.02%, copper content is less than 0.25%, and phosphorus content is 0.18%, silicon content 0.25%, manganese content 0.35%, nickel content 0.25%；
(2) moulding: require design molding according to drawing of rough casting paper size, mould includes mold and lower mold, and mold and lower mold are assembled into core shooter, by core shooter by full for molding sand pressure model, molding sand is heating and curing after molding under the conditions of temperature is 100 DEG C, standby；
(3) cast: by the ferrum liquid in step (1) under the conditions of temperature is 1350 DEG C, adds silicon strontium inovulant, and the addition of described inovulant is the 0.2% of ferrum liquid weight, it is poured in the moulding in step (2), the duration of pouring is 2min, after casting complete, is cooled to 400 DEG C and takes out platen；
(4) heat treatment: platen is incubated under the conditions of 400 DEG C 50min, is warming up to 900 DEG C, is incubated 120min, is cooled to 380 DEG C, insulation 80min, then rise again to 680 DEG C, it is incubated 100min, fast cooling to 400 DEG C, keep 50min, natural cooling, after polishing, obtain finished product platen.
The casting technique of described a kind of platen, described molding sand is made up of the raw material of following parts by weight: silica sand 100 parts, acrylic resin 12 parts, tertiary amine 1.5 parts, 9 parts of kieselguhr, silane coupler 1.2 parts and 15 parts of water.In described silica sand, the content of silicon dioxide is 92%.Described molding sand is through the following steps that obtain: after silica sand and water mix homogeneously, is slowly added to acrylic resin and kieselguhr, is stirring evenly and then adding into silane coupler, be eventually adding tertiary amine, quickly obtains molding sand after stirring mixing 3min.
Embodiment 2
In the present embodiment, the casting technique of a kind of platen, including following step:
(1) furnace charge melting: be that 3:1 is placed in melting in electric furnace according to weight ratio by steel scrap and the pig iron, melting 3h under conditions of temperature is 1550 DEG C, in the ferrum liquid obtained, sulfur content is less than 0.02%, phosphorus content is less than 0.02%, copper content is less than 0.25%, and phosphorus content is 0.15%, silicon content 0.2%, manganese content 0.45%, nickel content 0.35%；
(2) moulding: require design molding according to drawing of rough casting paper size, mould includes mold and lower mold, and mold and lower mold are assembled into core shooter, by core shooter by full for molding sand pressure model, molding sand is heating and curing after molding under the conditions of temperature is 80 DEG C, standby；
(3) cast: by the ferrum liquid in step (1) under the conditions of temperature is 1320 DEG C, adds silicon strontium inovulant, and the addition of described inovulant is the 0.15% of ferrum liquid weight, it is poured in the moulding in step (2), the duration of pouring is 4min, after casting complete, is cooled to 300 DEG C and takes out platen；
(4) heat treatment: platen is incubated under the conditions of 300 DEG C 80min, is warming up to 860 DEG C, is incubated 150min, is cooled to 350 DEG C, insulation 100min, then rise again to 650 DEG C, it is incubated 120min, fast cooling to 300 DEG C, keep 80min, natural cooling, after polishing, obtain finished product platen.
The casting technique of described a kind of platen, described molding sand is made up of the raw material of following parts by weight: silica sand 100 parts, acrylic resin 10 parts, tertiary amine 1 part, 6 parts of kieselguhr, silane coupler 0.5 part and 10 parts of water.In described silica sand, the content of silicon dioxide is 88%.Described molding sand is through the following steps that obtain: after silica sand and water mix homogeneously, is slowly added to acrylic resin and kieselguhr, is stirring evenly and then adding into silane coupler, be eventually adding tertiary amine, quickly obtains molding sand after stirring mixing 1min.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, on the premise of without departing from the technology of the present invention principle; can also make some improvement and deformation, these improve and deformation also should be regarded as protection scope of the present invention.
Claims (6)
1. a casting technique for platen, is characterized in that, including following step:
(1) furnace charge melting: be that 3:1 is placed in melting in electric furnace according to weight ratio by steel scrap and the pig iron, melting 2-3h under conditions of temperature is 1550-1580 DEG C, in the ferrum liquid obtained, sulfur content is less than 0.02%, phosphorus content is less than 0.02%, copper content is less than 0.25%, and phosphorus content is 0.15-0.18%, silicon content 0.2-0.25%, manganese content 0.35-0.45%, nickel content 0.25-0.35%；
(2) moulding: require design molding according to drawing of rough casting paper size, mould includes mold and lower mold, and mold and lower mold are assembled into core shooter, by core shooter by full for molding sand pressure model, molding sand is heating and curing after molding under the conditions of temperature is 80-100 DEG C, standby；
(3) cast: by the ferrum liquid in step (1) under the conditions of temperature is 1320-1350 DEG C, adds inovulant, is poured in the moulding in step (2), and the duration of pouring is 2-4min, after casting complete, is cooled to 300-400 DEG C and takes out platen；
(4) heat treatment: platen is incubated under the conditions of 300-400 DEG C 50-80min, it is warming up to 860-900 DEG C, insulation 120-150min, is cooled to 350-380 DEG C, is incubated 80-100min, rise again again to 650-680 DEG C, insulation 100-120min, fast cooling, to 300-400 DEG C, keeps 50-80min, natural cooling, obtains finished product platen after polishing.
The casting technique of a kind of platen the most according to claim 1, it is characterized in that, described molding sand is made up of the raw material of following parts by weight: silica sand 100 parts, acrylic resin 10-12 part, tertiary amine 1-1.5 part, kieselguhr 6-9 part, silane coupler 0.5-1.2 part and water 10-15 part.
The casting technique of a kind of platen the most according to claim 2, is characterized in that, in described silica sand, the content of silicon dioxide is 88-92%.
4. according to the casting technique of a kind of platen described in Claims 2 or 3, it is characterized in that, described molding sand through the following steps that obtain: after silica sand and water mix homogeneously, it is slowly added to acrylic resin and kieselguhr, it is stirring evenly and then adding into silane coupler, it is eventually adding tertiary amine, quickly obtains molding sand after stirring mixing 1-3min.
The casting technique of a kind of platen the most according to claim 1, is characterized in that, the addition of described inovulant is the 0.15-0.2% of ferrum liquid weight.
The casting technique of a kind of platen the most according to claim 5, is characterized in that, described inovulant is silicon strontium inovulant.
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| CN201410430808.3A CN104226912B (en) | 2014-08-29 | 2014-08-29 | A kind of casting technique of platen |
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| CN201410430808.3A CN104226912B (en) | 2014-08-29 | 2014-08-29 | A kind of casting technique of platen |
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| CN104226912B true CN104226912B (en) | 2016-08-10 |
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| CN104959548A (en) * | 2015-07-20 | 2015-10-07 | 柳州市建西机械铸造厂 | Casting method for pressure plate |
| CN107252876A (en) * | 2017-06-28 | 2017-10-17 | 安徽华飞机械铸锻有限公司 | A kind of casting method of sternpost |
| CN107287521A (en) * | 2017-06-28 | 2017-10-24 | 安徽华飞机械铸锻有限公司 | A kind of gear casting production process |
| CN107511456A (en) * | 2017-08-03 | 2017-12-26 | 六安万邦机械科技有限公司 | A kind of casting technique of evaporative pattern |
| CN107513659A (en) * | 2017-09-08 | 2017-12-26 | 常德市达鑫电气有限公司 | A kind of platen manufacture method and platen |
| WO2019061239A1 (en) * | 2017-09-29 | 2019-04-04 | 吴江市液铸液压件铸造有限公司 | Process for fabricating spherical end cap casting |
| CN107790643A (en) * | 2017-09-29 | 2018-03-13 | 吴江市液铸液压件铸造有限公司 | A kind of multi-way valve body liquid casts hydraulic part |
| CN107790639A (en) * | 2017-09-29 | 2018-03-13 | 吴江市液铸液压件铸造有限公司 | A kind of processing technology of spherical end cover casting |
| CN107716844A (en) * | 2017-09-29 | 2018-02-23 | 吴江市液铸液压件铸造有限公司 | A kind of processing technology of automobile output shaft casting |
| CN107699777A (en) * | 2017-09-30 | 2018-02-16 | 和县华顺铸造有限公司 | A kind of bearing cap casting technique |
| CN107755623A (en) * | 2017-10-27 | 2018-03-06 | 湖州正德轻工机械有限公司 | Automobile clutch pressure plate casting method |
| CN108085581A (en) * | 2018-01-23 | 2018-05-29 | 合肥康之恒机械科技有限公司 | A kind of iron casting casting method |
| CN110480271A (en) * | 2019-08-24 | 2019-11-22 | 浙江瓯赛汽车部件铸造有限公司 | A kind of processing technology of clutch compressing disc |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100450664C (en) * | 2007-01-09 | 2009-01-14 | 辽宁福鞍铸业集团有限公司 | Production of large and super-critical steel-casting by using alkali phenolic aldehyde resin art |
| RU2427444C1 (en) * | 2010-05-20 | 2011-08-27 | Открытое Акционерное Общество "Российские Железные Дороги" | Method of producing piston rings and cylinder sleeve billets |
| CN101890478B (en) * | 2010-07-16 | 2012-09-26 | 吴江市液铸液压件铸造有限公司 | Production process for casting spherical end cover |
| CN101890477A (en) * | 2010-07-16 | 2010-11-24 | 吴江市液铸液压件铸造有限公司 | Casting production technology of valve body |
| CN101875090A (en) * | 2010-07-16 | 2010-11-03 | 吴江市液铸液压件铸造有限公司 | Flange casting production process |
| CN101890479A (en) * | 2010-07-16 | 2010-11-24 | 吴江市液铸液压件铸造有限公司 | Cast iron cylinder block casting process |
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