CN105695856A - Nodular cast iron for high-toughness driving axle housing of high-end load-bearing forklift and production method thereof - Google Patents
Nodular cast iron for high-toughness driving axle housing of high-end load-bearing forklift and production method thereof Download PDFInfo
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- CN105695856A CN105695856A CN201610208785.0A CN201610208785A CN105695856A CN 105695856 A CN105695856 A CN 105695856A CN 201610208785 A CN201610208785 A CN 201610208785A CN 105695856 A CN105695856 A CN 105695856A
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- iron
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- driving axle
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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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- 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
- C22C37/04—Cast-iron alloys containing spheroidal graphite
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- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses nodular cast iron for a high-toughness driving axle housing of a high-end load-bearing forklift. The nodular cast iron comprises, by weight percentage, 3.2-3.4% of C, 1.8-2.1% of Si, 0-0.2% of Mn, 0-0.015% of S, 0-0.03% of P, 0.04-0.06% of Mg, 0-0.015% of Ti, 0.01-0.025% of Re, and the balance Fe. A specific production method includes the following steps that furan resin sand molding is adopted, a medium frequency furnace is used for smelting, a low spheroidizing temperature is adopted, secondary slagging-off is conducted after spheroidizing, metal-stream inoculation is carried out during ladle-to-ladle and pouring, pouring time is controlled, and the nodular cast iron for the high-toughness 650 Kg driving axle housing of the high-end load-bearing forklift is cast and meets requirements. The prepared nodular cast iron body is excellent in mechanical property, the matrix structure is compact, the cost is low, and the nodular cast iron is the optimal as-cast nodular iron QT400-18AL for producing the high-toughness 650 Kg driving axle housing of the high-end load-bearing forklift.
Description
Technical field:
The present invention relates to a kind of load-carrying high-end fork truck high tenacity 650KG driving axle housing spheroidal graphite cast-iron QT400-18AL and production method thereof, belong to load-carrying high tenacity forklift bridge shell production technical field。
Background technology:
Development along with Domestic Automotive Industry, the combination property of spheroidal graphite cast-iron is required more and more higher by load-carrying fork truck high tenacity 650KG driving axle housing class part, want large batch of steady production height trade mark high tenacity cast condition ductile iron part, difficulty is bigger, also taking into account production cost, this is the main cause causing many producers to be difficult to steady production simultaneously。
Summary of the invention:
The technical problem to be solved is: overcome the deficiency of existing production technology, a kind of load-carrying fork truck high tenacity 650KG driving axle housing spheroidal graphite cast-iron and production method thereof are provided, can carry out stablizing lasting production, substantially increase product yield and the quality of technique product, greatly reduce production cost to meet the demand in market and enterprise。
The present invention solves that technical problem is adopted the technical scheme that:
A kind of load-carrying high-end fork truck high tenacity driving axle housing spheroidal graphite cast-iron, its chemical composition is by weight percentage: carbon C3.2～3.4%, silicon Si1.8～2.1%, manganese Mn 0.2%, sulfur S≤0.015%, phosphorus P≤0.03%, magnesium Mg0.04～0.06%, titanium Ti≤0.015%, rhenium Re0.01～0.025%, surplus is ferrum Fe；
In this load-carrying high-end fork truck high tenacity driving axle housing spheroidal graphite cast-iron:
Matrix metallographic: ferrite 85%, cementite 3%, Oxygen potential 85%, graphite size: 6～8 grades；
Body mechanical property: tensile strength sigma b >=400MPa, elongation percentage δ >=18, V-notch single casting sample ballistic work: low temperature-20 ± 2 DEG C, Brinell hardness: 120～175HB, yield strength σ >=240。
The production method of described load-carrying high-end fork truck high tenacity driving axle housing spheroidal graphite cast-iron, its concrete technology flow process is as follows:
A, moulding operation: adopt furan resin-sand, scouring sand is the common silica sand that granularity is 40～70 orders, require clay content≤0.3%, moisture content≤0.3%, firming agent sulfonic acid solid agent, the addition of furan resin-sand is clean sand addition 0.8～1.2%, and sulfonic acid solid agent addition is the 30～60% of furan resin-sand；With alcohol-base paint, all positions contacted with ferrum liquid being brushed, fuse uses furan resin-sand to get by hand, and core requires that aerofluxus is good, die cavity to be cleaned out before mould assembling, and mould assembling gap must not exceed 1mm；
B, middle frequency furnace fusing operation: adopt 5 tons of middle frequency furnace continuous meltings, it is desirable to process is steady, tapping temperature 1450～1500 DEG C, ferrum liquid component requirements is: carbon C3.2～3.4%, silicon Si0.9～1.2%, sulfur S≤0.025%, phosphorus P≤0.03%, Mn≤0.2%, Ti≤0.015%；
C, spectral component analysis: 5 tons of middle frequency furnaces heat up after stablizing, and are stirred by sample spoon, fully in molten iron
After preheating, insert the sampling of below molten iron 150mm depths and carry out spectrum analysis；If composition has deviation, then it is adjusted in electric furnace, until meeting step " B " defined composition；After composition is qualified, ferrum liquid is poured into preparation spheroidising in nodularization bag；
D, spheroidising: adopt the common method that pours to carry out spheroidising, adding order is nodulizer Carson KM-60L, inovulant Carson KY-C, pretreating agent Carson's A level, then with slag rake, these alloys carries out appropriateness consolidation；Tapping temperature 1450～1500 DEG C, then spreads appropriate slagging scorification agent and skims, and the process of skimming must carry out 2 times, then passes through spectral analysis sample；
In E, nodularization bag spectral analysis sample qualified after, pour in pouring ladle, the addition of ladle-to-ladle inovulant is the 0.4% of weight of molten iron, ladle-to-ladle inovulant select Carson KY-C, granularity is 3～8mm；
F, casting process: carry out current-following inoculation in casting process, random inoculant selects granularity to be the Carson of 0.1～0.5mm, and each pouring ladle duration of pouring, single case duration of pouring was 40～60s, and pouring temperature is 1350～1330 DEG C less than 10 minutes；
G, shake out time: after pouring into a mould latter 4 hours, after cast iron shakes out, depletion phase test block carries out Metallographic Analysis；The cast iron that H, metallographic are qualified proceeds to dressing shop and clears up, and tests, and sprays antirust paint, packing
Put in storage。
In step " A ", described firming agent is sulfonic acid solid agent。
The nodulizer Carson KM-60L of the present invention, inovulant Carson KY-C, pretreating agent Carson's A level, ladle-to-ladle inovulant Carson KY-C etc., provide by Chongqing Carson's founding materials company limited and produce。
The present invention actively has the beneficial effect that:
1, the production method of load-carrying of the present invention high-end fork truck high tenacity 650KG driving axle housing spheroidal graphite cast-iron is adopted, substantially increase product yield and product quality, the spheroidal graphite cast-iron that the heavy duty high tenacity forklift bridge shell that can be mass-produced is special, effectively reduces casting cost。
2, the present invention is by adopting relatively low nodularization temperature of coming out of the stove, and is conducive to saving energy consumption, improving the unfailing performance of continuous-stable Foundry Production。
3, the load-carrying fork truck high tenacity 650KG driving axle housing cast condition ductile iron that the present invention produces, owing to adopting the one-tenth of the present invention to be grouped into and the reinforced order in stokehold, and with relatively low spheroidization treatment temperature, body good mechanical performance, matrix is fine and close, can be widely applied to load-carrying high tenacity forklift bridge shell and produces。
4, the load-carrying fork truck high tenacity 650KG driving axle housing cast condition ductile iron that the present invention produces, good mechanical performance, performance can fully meet the technical standard of QT400-18AL。
Detailed description of the invention:
Below in conjunction with specific embodiment, the present invention is made further explanation and description:
Embodiment: a kind of load-carrying high-end fork truck high tenacity driving axle housing spheroidal graphite cast-iron, its chemical composition is by weight percentage: carbon C3.2～3.4%, silicon Si1.8～2.1%, manganese Mn 0.2%, sulfur S≤0.015%, phosphorus P≤0.03%, magnesium Mg0.04～0.06%, titanium Ti≤0.015%, rhenium Re0.01～0.025%, surplus is ferrum Fe；
In this load-carrying high-end fork truck high tenacity driving axle housing spheroidal graphite cast-iron:
Matrix metallographic: ferrite 85%, cementite 3%, Oxygen potential 85%, graphite size: 6～8 grades；
Body mechanical property: tensile strength sigma b >=400MPa, elongation percentage δ >=18, V-notch single casting sample ballistic work: low temperature-20 ± 2 DEG C, Brinell hardness: 120～175HB, yield strength σ >=240。
The production method of load-carrying recited above high-end fork truck high tenacity driving axle housing spheroidal graphite cast-iron, its concrete technology flow process is as follows:
A, moulding operation: adopt furan resin-sand, scouring sand is the common silica sand that granularity is 40～70 orders, require clay content≤0.3%, moisture content≤0.3%, firming agent sulfonic acid solid agent, the addition of furan resin-sand is clean sand addition 0.8～1.2%, and sulfonic acid solid agent addition is the 30～60% of furan resin-sand；With alcohol-base paint, all positions contacted with ferrum liquid being brushed, fuse uses furan resin-sand to get by hand, and core requires that aerofluxus is good, die cavity to be cleaned out before mould assembling, and mould assembling gap must not exceed 1mm；
B, middle frequency furnace fusing operation: adopt 5 tons of middle frequency furnace continuous meltings, it is desirable to process is steady, tapping temperature 1450～1500 DEG C, ferrum liquid component requirements is: carbon C3.2～3.4%, silicon Si0.9～1.2%, sulfur S≤0.025%, phosphorus P≤0.03%, Mn≤0.2%, Ti≤0.015%；
C, spectral component analysis: 5 tons of middle frequency furnaces heat up after stablizing, and are stirred by sample spoon, fully in molten iron
After preheating, insert the sampling of below molten iron 150mm depths and carry out spectrum analysis；If composition has deviation, then it is adjusted in electric furnace, until meeting step " B " defined composition；After composition is qualified, ferrum liquid is poured into preparation spheroidising in nodularization bag；
D, spheroidising: adopt the common method that pours to carry out spheroidising, adding order is nodulizer Carson KM-60L, inovulant Carson KY-C, pretreating agent Carson's A level, then with slag rake, these alloys carries out appropriateness consolidation；Tapping temperature 1450～1500 DEG C, then spreads appropriate slagging scorification agent and skims, and the process of skimming must carry out 2 times, then passes through spectral analysis sample；
In E, nodularization bag spectral analysis sample qualified after, pour in pouring ladle, the addition of ladle-to-ladle inovulant is the 0.4% of weight of molten iron, ladle-to-ladle inovulant select Carson KY-C, granularity is 3～8mm；
F, casting process: carry out current-following inoculation in casting process, random inoculant selects granularity to be the Carson of 0.1～0.5mm, and each pouring ladle duration of pouring, single case duration of pouring was 40～60s, and pouring temperature is 1350～1330 DEG C less than 10 minutes；
G, shake out time: after pouring into a mould latter 4 hours, after cast iron shakes out, depletion phase test block carries out Metallographic Analysis；The cast iron that H, metallographic are qualified proceeds to dressing shop and clears up, and tests, and sprays antirust paint, packing
Put in storage。
Claims (3)
1. a load-carrying high-end fork truck high tenacity driving axle housing spheroidal graphite cast-iron, it is characterized in that: its chemical composition is by weight percentage: carbon C3.2～3.4%, silicon Si1.8～2.1%, manganese Mn 0.2%, sulfur S≤0.015%, phosphorus P≤0.03%, magnesium Mg0.04～0.06%, titanium Ti≤0.015%, rhenium Re0.01～0.025%, surplus is ferrum Fe；
In this load-carrying high-end fork truck high tenacity driving axle housing spheroidal graphite cast-iron:
Matrix metallographic: ferrite 85%, cementite 3%, Oxygen potential 85%, graphite size: 6～8 grades；
Body mechanical property: tensile strength sigma b >=400MPa, elongation percentage δ >=18, V-notch single casting sample ballistic work: low temperature-20 ± 2 DEG C, Brinell hardness: 120～175HB, yield strength σ >=240。
2. the production method of the load-carrying high-end fork truck high tenacity driving axle housing spheroidal graphite cast-iron described in claim 1, its concrete technology flow process is as follows:
A, moulding operation: adopt furan resin-sand, scouring sand is the common silica sand that granularity is 40～70 orders, require clay content≤0.3%, moisture content≤0.3%, firming agent sulfonic acid solid agent, the addition of furan resin-sand is clean sand addition 0.8～1.2%, and sulfonic acid solid agent addition is the 30～60% of furan resin-sand；With alcohol-base paint, all positions contacted with ferrum liquid being brushed, fuse uses furan resin-sand to get by hand, and core requires that aerofluxus is good, die cavity to be cleaned out before mould assembling, and mould assembling gap must not exceed 1mm；
B, middle frequency furnace fusing operation: adopt 5 tons of middle frequency furnace continuous meltings, it is desirable to process is steady, tapping temperature 1450～1500 DEG C, ferrum liquid component requirements is: carbon C3.2～3.4%, silicon Si0.9～1.2%, sulfur S≤0.025%, phosphorus P≤0.03%, Mn≤0.2%, Ti≤0.015%；
C, spectral component analysis: 5 tons of middle frequency furnaces heat up after stablizing, and are stirred by sample spoon, fully in molten iron
After preheating, insert the sampling of below molten iron 150mm depths and carry out spectrum analysis；If composition has deviation, then it is adjusted in electric furnace, until meeting step " B " defined composition；After composition is qualified, ferrum liquid is poured into preparation spheroidising in nodularization bag；
D, spheroidising: adopt the common method that pours to carry out spheroidising, adding order is nodulizer Carson KM-60L, inovulant Carson KY-C, pretreating agent Carson's A level, then with slag rake, these alloys carries out appropriateness consolidation；Tapping temperature 1450～1500 DEG C, then spreads appropriate slagging scorification agent and skims, and the process of skimming must carry out 2 times, then passes through spectral analysis sample；
In E, nodularization bag spectral analysis sample qualified after, pour in pouring ladle, the addition of ladle-to-ladle inovulant is the 0.4% of weight of molten iron, ladle-to-ladle inovulant select Carson KY-C, granularity is 3～8mm；
F, casting process: carry out current-following inoculation in casting process, random inoculant selects granularity to be the Carson of 0.1～0.5mm, and each pouring ladle duration of pouring, single case duration of pouring was 40～60s, and pouring temperature is 1350～1330 DEG C less than 10 minutes；
G, shake out time: after pouring into a mould latter 4 hours, after cast iron shakes out, depletion phase test block carries out Metallographic Analysis；The cast iron that H, metallographic are qualified proceeds to dressing shop and clears up, and tests, and sprays antirust paint, packing
Put in storage。
3. the production method of load-carrying according to claim 2 high-end fork truck high tenacity driving axle housing spheroidal graphite cast-iron, it is characterised in that: in step " A ", described firming agent is sulfonic acid solid agent。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208785.0A CN105695856A (en) | 2016-04-06 | 2016-04-06 | Nodular cast iron for high-toughness driving axle housing of high-end load-bearing forklift and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610208785.0A CN105695856A (en) | 2016-04-06 | 2016-04-06 | Nodular cast iron for high-toughness driving axle housing of high-end load-bearing forklift and production method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086609A (en) * | 2016-07-14 | 2016-11-09 | 安徽樵森电气科技股份有限公司 | A kind of spheroidal graphite cast-iron yoke plate |
| CN106244904A (en) * | 2016-07-14 | 2016-12-21 | 安徽樵森电气科技股份有限公司 | A kind of corrosion-resistant prolongation ring |
| CN111621691A (en) * | 2020-05-12 | 2020-09-04 | 安徽天平机械股份有限公司 | Automobile drive axle housing and casting process thereof |
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| JPH04329823A (en) * | 1991-05-01 | 1992-11-18 | Senshiyuu:Kk | Production of mandrel made of ductile cast iron for crawler |
| JP3204293B2 (en) * | 1996-04-29 | 2001-09-04 | 日立金属株式会社 | Method of manufacturing spheroidal graphite cast iron member |
| JP5113104B2 (en) * | 2009-02-18 | 2013-01-09 | 株式会社栗本鐵工所 | Spheroidal graphite cast iron pipe and manufacturing method thereof |
| CN102965567A (en) * | 2012-11-22 | 2013-03-13 | 日月重工股份有限公司 | Casting thick large-section pearlite nodular cast iron and casting method thereof |
| CN103422009A (en) * | 2013-08-14 | 2013-12-04 | 辉县市汽车配件有限责任公司 | Nodular cast iron for rear axle housing of lorry and production method of nodular cast iron |
| CN104024449A (en) * | 2011-08-17 | 2014-09-03 | 马勒发动机零部件巴西有限公司 | Cylinder liner and cast iron alloy |
-
2016
- 2016-04-06 CN CN201610208785.0A patent/CN105695856A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04329823A (en) * | 1991-05-01 | 1992-11-18 | Senshiyuu:Kk | Production of mandrel made of ductile cast iron for crawler |
| JP3204293B2 (en) * | 1996-04-29 | 2001-09-04 | 日立金属株式会社 | Method of manufacturing spheroidal graphite cast iron member |
| JP5113104B2 (en) * | 2009-02-18 | 2013-01-09 | 株式会社栗本鐵工所 | Spheroidal graphite cast iron pipe and manufacturing method thereof |
| CN104024449A (en) * | 2011-08-17 | 2014-09-03 | 马勒发动机零部件巴西有限公司 | Cylinder liner and cast iron alloy |
| CN102965567A (en) * | 2012-11-22 | 2013-03-13 | 日月重工股份有限公司 | Casting thick large-section pearlite nodular cast iron and casting method thereof |
| CN103422009A (en) * | 2013-08-14 | 2013-12-04 | 辉县市汽车配件有限责任公司 | Nodular cast iron for rear axle housing of lorry and production method of nodular cast iron |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086609A (en) * | 2016-07-14 | 2016-11-09 | 安徽樵森电气科技股份有限公司 | A kind of spheroidal graphite cast-iron yoke plate |
| CN106244904A (en) * | 2016-07-14 | 2016-12-21 | 安徽樵森电气科技股份有限公司 | A kind of corrosion-resistant prolongation ring |
| CN111621691A (en) * | 2020-05-12 | 2020-09-04 | 安徽天平机械股份有限公司 | Automobile drive axle housing and casting process thereof |
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Application publication date: 20160622 |