CN106244911A - Automobile steering device housing solution strengthening ferrite ductile cast iron and production method thereof - Google Patents
Automobile steering device housing solution strengthening ferrite ductile cast iron and production method thereof Download PDFInfo
- Publication number
- CN106244911A CN106244911A CN201610755473.1A CN201610755473A CN106244911A CN 106244911 A CN106244911 A CN 106244911A CN 201610755473 A CN201610755473 A CN 201610755473A CN 106244911 A CN106244911 A CN 106244911A
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- solution strengthening
- steering device
- device housing
- automobile steering
- cast iron
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Classifications
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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
-
- 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
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
- C22C33/12—Making cast-iron alloys including procedures for adding magnesium by fluidised injection
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a kind of automobile steering device housing solution strengthening ferrite ductile cast iron, its chemical composition is by weight percentage: carbon C 3.10～3.50%, silicon Si 3.20～3.70%, manganese Mn≤0.50%, phosphorus P≤0.05%, sulfur S≤0.015%, rare earth RE≤0.03%, magnesium Mg0.03～0.06%, surplus is ferrum Fe.Its solution strengthening production method includes: electro-smelting operation, stocks process the processes such as requirement, molten iron processing method, late inoculation, cast, after cast molten iron through mulling, coremaking, moulding, knockout, clear up, check, protect, the program such as warehouse-in, obtain satisfactory automobile steering device housing solution strengthening ferrite ductile cast iron.Production process of the present invention need not add the pearlite alloys such as the metal such as copper, stannum and ferromanganese again, by using silicon solution strengthening ferrite, by being met the serviceability of material and the needs of processing characteristics by the ferrite after solution strengthening, reduce production cost simultaneously, meet the needs of market and enterprise.
Description
Technical field:
The present invention relates to the production method of a kind of spheroidal graphite cast-iron, particularly relate to a kind of automobile steering device housing solution strengthening ferrum
Ferritic spheroidal graphite cast-iron and solution strengthening production method thereof.
Background technology:
Along with the development of Domestic Automotive Industry, the combination property of spheroidal graphite cast-iron is required more by automobile steering device housing, valve body piece
Come the highest, there is high-strength tenacity, good anti-fatigue performance, excellent machinability have become as domestic and international main frame and join
The target that set factory is pursued.
Summary of the invention:
The technical problem to be solved is: provide a kind of automobile steering device housing solution strengthening ferrite ductile cast iron
And solution strengthening production method, overturn traditional closing aurification and ensure content of pearlite in alloy and by the hundred of content of pearlite in alloy
The adjustment of proportion by subtraction meets the production technology of the material melting of different trade mark magnesium iron hardness and other mechanical properties, uses silicon solid solution
Reinforced ferrite, by being met the serviceability of material and the needs of processing characteristics, simultaneously by the ferrite after solution strengthening
Reduce production cost, meet the needs of market and enterprise.
The present invention solves that technical problem is adopted the technical scheme that:
A kind of automobile steering device housing solution strengthening ferrite ductile cast iron, its chemical composition is by weight percentage:
Carbon C 3.10～3.50%, silicon Si3.20～3.70%, manganese Mn≤0.50%, phosphorus P≤0.05%, sulfur S≤0.015%, rare earth RE≤
0.03%, magnesium Mg0.03～0.06%, surplus is ferrum Fe；
This automobile steering device housing is with in solution strengthening ferrite ductile cast iron:
Matrix based on ferrite, cementite ＜ 1%；
Body mechanical property: all meet solution strengthening ferritic spheroidal graphite cast iron Europe DIN EN 1563--2012 standard.
The production method of automobile steering device housing solution strengthening ferrite ductile cast iron recited above, its concrete technology
Flow process is as follows:
A, electro-smelting operation: use 5 tons or 6 tons of intermediate frequency furnaces melt stocks, melting down after skim more than 1400 DEG C sampling, essence
Refining temperature is 1500 DEG C ± 10 DEG C, quiescence in high temperature more than 5 minutes；
B, stocks require: stocks composition is qualified, temperature is qualified and after clean slag can water outlet, tapping temperature >=1420 DEG C；
C, molten iron process:
1. nodulizer: FeSiMg6RE2 selected by nodulizer, and granularity 10～25mm, addition is the 1.0%～1.2% of ferrum liquid weight；
2. pressure bag inovulant: pressure bag inovulant select FeSi75, granularity 5～25mm, addition be ferrum liquid weight 0.6～
1.0%；
3. nodularization bag: nodularization bag requires that internal diameter d meets with wrapping deep h: about d/h=1:1.8, bottom is dam-type nodularization room, nodularization
After bag is built, use ladle dryer to dry, dry thoroughly, before using, scald bag to more than 600 DEG C by stocks；
4. spheroidising: employing is poured method and carried out spheroidising, charging order is nodulizer, pressure bag inovulant, then needs to shakeout
And appropriate compacting, leaving water temperature >=1420 DEG C, the spheroidizing reacion time is 50s～80s, and nodularization turns after terminating to need clean slag, covering again
Fortune；
D, late inoculation:
Molten iron is late inoculation to be carried out when ladle-to-ladle, and FeSi75 selected by post inoculant, and granularity 2～3mm, addition is molten iron weight
The 0.2% of amount；Need clean slag, thermometric before cast and take the spectrum sample final hot metal composition of checking；
E, casting process: use the cast of production line automatic pouring machine；
1. the duration of pouring:
Each nodularization bag controls the duration of pouring: start to calculate, less than 10 minutes from water outlet；Terminate to calculate from nodularization, do not surpass
Spend 8 minutes；
2. pouring temperature: pouring temperature head temperature according to the size of product and structure control at 1370～1420 DEG C；Pouring temperature end
Case temperature according to the size of product and structure control at 1320～1350 DEG C；
3. current-following inoculation: use the FeSi75 current-following inoculation of granularity 0.2～0.8 mm in casting process, addition is with stream molten iron
The 0.08% of weight；
F, other:
After cast molten iron through mulling, coremaking, moulding, knockout, clear up, check, protect, the program such as warehouse-in, met the requirements
Automobile steering device housing solution strengthening ferrite ductile cast iron.
The positive effect of the present invention is as follows:
1, use the production method of the present invention, production process need not add the pearlite such as the metal such as copper, stannum and ferromanganese again
Alloy, i.e. can be mass-produced automobile steering device housing and valve body, effectively reduces casting cost.
2, use the production method of the present invention, by controlling chemical composition and the tapping temperature of stocks, effectively reduce ball
The addition of agent, reduce casting cost while effectively reduce Mg and RE residual excessive thus to Shrinkage Porosity and segregation
Deng adverse effect.
3, the automobile steering device housing solution strengthening ferrite ductile cast iron that the present invention is produced, with traditional ball
Ferrum (QT450-10, QT500-7, QT600-3) compares: elongation percentage improve more than 50%, hardness fluctuations amplitude reduction 50～
75%, it is stable that yield tensile ratio rises to 0.72～0.82, product mechanical property and anti-fatigue performance from 0.55～0.65, processing characteristics
Excellence, the spheroidal graphite cast-iron that can be widely used for automobile steering device housing and valve body produces.
4, the automobile steering device housing solution strengthening ferrite ductile cast iron that the present invention is produced, mechanical property is excellent
Good, performance fully meets solution strengthening ferritic spheroidal graphite cast iron Europe DIN EN 1563--2012 standard.
Detailed description of the invention:
Below in conjunction with specific embodiment, the present invention is made further explanation and description:
Embodiment 1: a kind of automobile steering device housing solution strengthening ferrite ductile cast iron, its chemical composition by weight hundred
Proportion by subtraction is: carbon C 3.10%, silicon Si 3.70%, manganese Mn 0.50%, phosphorus P 0.05%, sulfur S 0.015%, rare earth RE 0.03%, magnesium Mg
0.03 %, surplus is ferrum Fe；
This automobile steering device housing is with in solution strengthening ferrite ductile cast iron:
Matrix based on ferrite, cementite ＜ 1%；
Body mechanical property: all meet solution strengthening ferritic spheroidal graphite cast iron Europe DIN EN 1563--2012 standard.
The production method of automobile steering device housing solution strengthening ferrite ductile cast iron recited above, its concrete technology
Flow process is as follows:
A, electro-smelting operation: use 5 tons or 6 tons of intermediate frequency furnaces melt stocks, melting down after skim more than 1400 DEG C sampling, essence
Refining temperature is 1500 DEG C ± 10 DEG C, quiescence in high temperature more than 5 minutes；
B, stocks require: stocks composition is qualified, temperature is qualified and after clean slag can water outlet, tapping temperature >=1420 DEG C；
C, molten iron process:
1. nodulizer: FeSiMg6RE2 selected by nodulizer, and granularity 10～25mm, addition is the 1.0%～1.2% of ferrum liquid weight；
2. pressure bag inovulant: pressure bag inovulant select FeSi75, granularity 5～25mm, addition be ferrum liquid weight 0.6～
1.0%；
3. nodularization bag: nodularization bag requires that internal diameter d meets with wrapping deep h: about d/h=1:1.8, bottom is dam-type nodularization room, nodularization
After bag is built, use ladle dryer to dry, dry thoroughly, before using, scald bag to more than 600 DEG C by stocks；
4. spheroidising: employing is poured method and carried out spheroidising, charging order is nodulizer, pressure bag inovulant, then needs to shakeout
And appropriate compacting, leaving water temperature >=1420 DEG C, the spheroidizing reacion time is 50s～80s, and nodularization turns after terminating to need clean slag, covering again
Fortune；
D, late inoculation:
Molten iron is late inoculation to be carried out when ladle-to-ladle, and FeSi75 selected by post inoculant, and granularity 2～3mm, addition is molten iron weight
The 0.2% of amount；Need clean slag, thermometric before cast and take the spectrum sample final hot metal composition of checking；
E, casting process: use the cast of production line automatic pouring machine；
1. the duration of pouring:
Each nodularization bag controls the duration of pouring: start to calculate, less than 10 minutes from water outlet；Terminate to calculate from nodularization, do not surpass
Spend 8 minutes；
2. pouring temperature: pouring temperature head temperature according to the size of product and structure control at 1370～1420 DEG C；Pouring temperature end
Case temperature according to the size of product and structure control at 1320～1350 DEG C；
3. current-following inoculation: use the FeSi75 current-following inoculation of granularity 0.2～0.8 mm in casting process, addition is with stream molten iron
The 0.08% of weight；
F, other:
After cast molten iron through mulling, coremaking, moulding, knockout, clear up, check, protect, the program such as warehouse-in, met the requirements
Automobile steering device housing solution strengthening ferrite ductile cast iron.
Embodiment 2: production method and the embodiment 1 of the present embodiment are essentially identical, and something in common does not repeats, and difference exists
In: a kind of automobile steering device housing solution strengthening ferrite ductile cast iron, its chemical composition is by weight percentage: carbon
C 3.50%, silicon Si 3.20%, manganese Mn 0.20%, phosphorus P 0.03%, sulfur S 0.010%, rare earth RE 0.01%, magnesium Mg 0.06%, remaining
Amount is ferrum Fe.
Embodiment 3: production method and the embodiment 1 of the present embodiment are essentially identical, and something in common does not repeats, and difference exists
In: a kind of automobile steering device housing solution strengthening ferrite ductile cast iron, its chemical composition is by weight percentage: carbon
C 3.20%, silicon Si 3.50%, manganese Mn 0.30%, phosphorus P 0.04%, sulfur S 0.005%, rare earth RE 0.02%, magnesium Mg 0.04%, remaining
Amount is ferrum Fe.
Embodiment 4: production method and the embodiment 1 of the present embodiment are essentially identical, and something in common does not repeats, and difference exists
In: a kind of automobile steering device housing solution strengthening ferrite ductile cast iron, its chemical composition is by weight percentage: carbon
C 3.45%, silicon Si 3.55%, manganese Mn 0.25%, phosphorus P 0.01%, sulfur S 0.012%, rare earth RE 0.025%, magnesium Mg 0.05%,
Surplus is ferrum Fe.
Embodiment 5: production method and the embodiment 1 of the present embodiment are essentially identical, and something in common does not repeats, and difference exists
In: a kind of automobile steering device housing solution strengthening ferrite ductile cast iron, its chemical composition is by weight percentage: carbon
C 3.30%, silicon Si 3.60%, manganese Mn 0.35%, phosphorus P 0.03%, sulfur S 0.008%, rare earth RE 0.015%, magnesium Mg 0.045%,
Surplus is ferrum Fe.
Embodiment 6: production method and the embodiment 1 of the present embodiment are essentially identical, and something in common does not repeats, and difference exists
In: a kind of automobile steering device housing solution strengthening ferrite ductile cast iron, its chemical composition is by weight percentage: carbon
C 3.35%, silicon Si 3.45%, manganese Mn≤0.25%, phosphorus P≤0.02%, sulfur S≤0.010%, rare earth RE≤0.015%, magnesium
Mg0.04%, surplus is ferrum Fe.
The above, be all common instance of the present invention, is not that the present invention makees any pro forma restriction, every
Any simple modification, equivalent variations and the modification made above example according to the technical spirit of the present invention, all still falls within this
Within the protection domain of inventive technique scheme.
Claims (2)
1. an automobile steering device housing solution strengthening ferrite ductile cast iron, it is characterised in that: this automobile steering device housing
By the chemical composition of solution strengthening ferrite ductile cast iron it is by weight percentage: carbon C 3.10～3.50%, silicon Si3.20
～3.70%, manganese Mn≤0.50%, phosphorus P≤0.05%, sulfur S≤0.015%, rare earth RE≤0.03%, magnesium Mg0.03～0.06%, surplus
For ferrum Fe；
This automobile steering device housing is with in solution strengthening ferrite ductile cast iron:
Matrix based on ferrite, cementite ＜ 1%；
Body mechanical property: all meet solution strengthening ferritic spheroidal graphite cast iron Europe DIN EN 1563--2012 standard.
2. the production method of solution strengthening ferrite ductile cast iron of the automobile steering device housing described in claim 1, it is concrete
Technological process is as follows:
A, electro-smelting operation: use 5 tons or 6 tons of intermediate frequency furnaces melt stocks, melting down after skim more than 1400 DEG C sampling, essence
Refining temperature is 1500 DEG C ± 10 DEG C, quiescence in high temperature more than 5 minutes；
B, stocks require: stocks composition is qualified, temperature is qualified and after clean slag can water outlet, tapping temperature >=1420 DEG C；
C, molten iron process:
1. nodulizer: FeSiMg6RE2 selected by nodulizer, and granularity 10～25mm, addition is the 1.0%～1.2% of ferrum liquid weight；
2. pressure bag inovulant: pressure bag inovulant select FeSi75, granularity 5～25mm, addition be ferrum liquid weight 0.6～
1.0%；
3. nodularization bag: nodularization bag requires that internal diameter d meets with wrapping deep h: about d/h=1:1.8, bottom is dam-type nodularization room, nodularization
After bag is built, use ladle dryer to dry, dry thoroughly, before using, scald bag to more than 600 DEG C by stocks；
4. spheroidising: employing is poured method and carried out spheroidising, charging order is nodulizer, pressure bag inovulant, then needs to shakeout
And appropriate compacting, leaving water temperature >=1420 DEG C, the spheroidizing reacion time is 50s～80s, and nodularization turns after terminating to need clean slag, covering again
Fortune；
D, late inoculation:
Molten iron is late inoculation to be carried out when ladle-to-ladle, and FeSi75 selected by post inoculant, and granularity 2～3mm, addition is molten iron weight
The 0.2% of amount；Need clean slag, thermometric before cast and take the spectrum sample final hot metal composition of checking；
E, casting process: use the cast of production line automatic pouring machine；
1. the duration of pouring:
Each nodularization bag controls the duration of pouring: start to calculate, less than 10 minutes from water outlet；Terminate to calculate from nodularization, do not surpass
Spend 8 minutes；
2. pouring temperature: pouring temperature head temperature according to the size of product and structure control at 1370～1420 DEG C；Pouring temperature end
Case temperature according to the size of product and structure control at 1320～1350 DEG C；
3. current-following inoculation: use the FeSi75 current-following inoculation of granularity 0.2～0.8 mm in casting process, addition is with stream molten iron
The 0.08% of weight；
F, other:
After cast molten iron through mulling, coremaking, moulding, knockout, clear up, check, protect, the program such as warehouse-in, met the requirements
Automobile steering device housing solution strengthening ferrite ductile cast iron.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610755473.1A CN106244911B (en) | 2016-08-30 | 2016-08-30 | Automobile steering device shell solution strengthening ferrite ductile cast iron and its production method |
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|---|---|---|---|
| CN201610755473.1A CN106244911B (en) | 2016-08-30 | 2016-08-30 | Automobile steering device shell solution strengthening ferrite ductile cast iron and its production method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107686936A (en) * | 2017-08-23 | 2018-02-13 | 广东中天创展球铁有限公司 | A kind of gooseneck material kettle cast iron and preparation method thereof |
| CN109402495A (en) * | 2018-11-28 | 2019-03-01 | 精诚工科汽车系统有限公司 | Alloying element addition method for determination of amount and ductile cast iron casting and its casting and mold in ductile cast iron casting with uniform wall thickness |
| CN110093555A (en) * | 2019-04-25 | 2019-08-06 | 河南广瑞汽车部件股份有限公司 | High-performing car steering gear housing solution strengthening ferritic spheroidal graphite cast iron and production method |
| CN110578084A (en) * | 2019-10-19 | 2019-12-17 | 锦州捷通铁路机械股份有限公司 | Production process of as-cast full-ferrite nodular cast iron material |
| CN112111688A (en) * | 2020-09-16 | 2020-12-22 | 河南广瑞汽车部件股份有限公司 | Nodular cast iron capable of effectively reducing shrinkage cavity and shrinkage porosity tendency and production method thereof |
| CN112126845A (en) * | 2020-09-16 | 2020-12-25 | 河南广瑞汽车部件股份有限公司 | QT500-14 solid solution strengthening ferrite ductile iron for automobile steering gear shell and production method thereof |
| CN114480954A (en) * | 2021-11-29 | 2022-05-13 | 武汉市科发铁合金有限公司 | Three-body composite casting wear-resistant lining plate and manufacturing method thereof |
| CN116479317A (en) * | 2023-04-25 | 2023-07-25 | 中国第一汽车股份有限公司 | QT600-10 lifting ring and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107686936A (en) * | 2017-08-23 | 2018-02-13 | 广东中天创展球铁有限公司 | A kind of gooseneck material kettle cast iron and preparation method thereof |
| CN109402495A (en) * | 2018-11-28 | 2019-03-01 | 精诚工科汽车系统有限公司 | Alloying element addition method for determination of amount and ductile cast iron casting and its casting and mold in ductile cast iron casting with uniform wall thickness |
| CN110093555A (en) * | 2019-04-25 | 2019-08-06 | 河南广瑞汽车部件股份有限公司 | High-performing car steering gear housing solution strengthening ferritic spheroidal graphite cast iron and production method |
| CN110578084A (en) * | 2019-10-19 | 2019-12-17 | 锦州捷通铁路机械股份有限公司 | Production process of as-cast full-ferrite nodular cast iron material |
| CN112111688A (en) * | 2020-09-16 | 2020-12-22 | 河南广瑞汽车部件股份有限公司 | Nodular cast iron capable of effectively reducing shrinkage cavity and shrinkage porosity tendency and production method thereof |
| CN112126845A (en) * | 2020-09-16 | 2020-12-25 | 河南广瑞汽车部件股份有限公司 | QT500-14 solid solution strengthening ferrite ductile iron for automobile steering gear shell and production method thereof |
| CN112111688B (en) * | 2020-09-16 | 2021-12-10 | 河南广瑞汽车部件股份有限公司 | Nodular cast iron capable of effectively reducing shrinkage cavity and shrinkage porosity tendency and production method thereof |
| CN114480954A (en) * | 2021-11-29 | 2022-05-13 | 武汉市科发铁合金有限公司 | Three-body composite casting wear-resistant lining plate and manufacturing method thereof |
| CN116479317A (en) * | 2023-04-25 | 2023-07-25 | 中国第一汽车股份有限公司 | QT600-10 lifting ring and production method thereof |
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