CN105401063B - A kind of the ductile cast iron as-cast cylinder jacket and its production technology of centrifugal casting production - Google Patents

A kind of the ductile cast iron as-cast cylinder jacket and its production technology of centrifugal casting production Download PDF

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Publication number
CN105401063B
CN105401063B CN201510831366.8A CN201510831366A CN105401063B CN 105401063 B CN105401063 B CN 105401063B CN 201510831366 A CN201510831366 A CN 201510831366A CN 105401063 B CN105401063 B CN 105401063B
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cast
cylinder jacket
casting
production
iron
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CN105401063A (en
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张亮亮
刘栋
赵广华
王勇
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Central Plains Nei Pei Group PLC
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Central Plains Nei Pei Group PLC
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B22D13/04—Centrifugal casting; Casting by using centrifugal force of shallow solid or hollow bodies, e.g. wheels or rings, in moulds rotating around their axis of symmetry
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • 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
    • 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
    • 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
    • C21D2211/006—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
    • C21D2211/009—Pearlite

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

The present invention relates to the ductile cast iron as-cast cylinder jacket and its production technology of a kind of centrifugal casting production, by weight percentage, its materials chemistry composition is：Carbon 2.7~3.2%, silicon 1.8~2.2%, 0 ＜ phosphorus ＜ 0.1%, 0.03 ＜ sulphur ＜ 0.06%, manganese 0.3~0.8%, boron 0.005~0.01%, copper 1.5~1.7%, bismuth 0.06~0.08%, rare earth 0.06~0.08%, aluminium 0.002~0.004%, surplus is Fe.The cylinder jacket metallographic of the present invention is more than+95% pearlite of nodular graphite+a small amount of ferritic ductile cast iron as-cast cylinder jacket, the cylinder jacket tensile strength reaches more than 500MPa, hardness is more than 230HB, elongation percentage is more than 2.0%, has the advantages that low cost with short production cycle, elongation percentage and tensile strength height, wearability are good.

Description

A kind of the ductile cast iron as-cast cylinder jacket and its production technology of centrifugal casting production
Technical field
The invention belongs to cylinder sleeve technology field, and in particular to a kind of ductile cast iron as-cast cylinder jacket of centrifugal casting production And its production technology.
Background technology
Current small-bore cylinder liner material is generally common grey iron or alloy cast iron, and such cylinder jacket relies primarily on reduction carbon Intensity and the requirement of wearability and its casting technique be complicated, percent defective is higher to meet for equivalent and alloy strengthening.Therefore, common ash Cast iron or alloy cast iron can not meet the production requirement of energy-saving and environmental protection cylinder jacket.
The content of the invention
, should present invention aims at a kind of the ductile cast iron as-cast cylinder jacket and its production technology of centrifugal casting production is provided Cylinder jacket has higher elongation percentage, tensile strength and good wearability.
To achieve the above object, the technical scheme that the present invention takes is as follows：
A kind of ductile cast iron as-cast cylinder jacket of centrifugal casting production, by weight percentage, cylinder jacket chemical composition is： Carbon 2.7~3.2%, silicon 1.8~2.2%, 0 ＜ phosphorus ＜ 0.1%, 0.03 ＜ sulphur ＜ 0.06%, manganese 0.3~0.8%, boron 0.005~ 0.01%th, copper 1.5~1.7%, bismuth 0.06~0.08%, cerium 0.06~0.08%, aluminium 0.002~0.004%, surplus is iron.
The production technology of the ductile cast iron as-cast cylinder jacket of above-mentioned centrifugal casting production, comprises the following steps：
（1）Using medium-frequency induction furnace melting, the raw material and melting raw material weighed in proportion in addition to bismuth, cerium and aluminium is total The carborundum of quality 0.5~3%, smelting temperature is 1470~1520 DEG C；Mode bred using following current when going out iron liquid add and account for iron liquid Weight 0.3~0.5%, the mixture being made up of carborundum and cerium, bismuth；
（2）Cast：Using water-cooled metal mould wet coating material centrifugal casting technique produce cylinder sleeve cast part, cast temperature 1430~ 1460 DEG C, casting machine 1300~1600r/min of rotating speed, 200 DEG C~230 DEG C of mold preheating temperature adds aluminium powder into wet coating material （Aluminium in raw material is added in the form of aluminium powder, and the role of aluminium powder is：When the iron liquid of high temperature is entered in mould, meeting and wet coating Material and aluminium powder contact, graphite forming core can be promoted by entering iron liquid after a small amount of aluminium powder fusing；Used aluminium powder is Henan Province ocean Aluminum Co., Ltd produces, model FLQG2#, 15~20 microns of average grain diameter, and purity is more than 99.5%）, aluminium powder is accounted for wet coating material With the 0.5% of aluminium powder gross mass, 1~2mm of paint thickness, casting weighs 3 ± 0.2Kg, 6 ± 1mm of casting section thickness, and casting endoporus 35 ± 1mm, 850 DEG C~950 DEG C of control casting mold clearing temperature；
（3）Cylinder Sleeve Castings are transferred to rapidly in 900 DEG C of vacuum drying oven after depanning（Model ZC2-65）Insulation 1~2 hour, Then furnace cooling, which is cooled to after 750 DEG C, again produces Cylinder Sleeve Castings air cooling of coming out of the stove.
Step（1）The carborundum granularity that middle first time adds is 1 ~ 2mm；Second carborundum granularity added for 0.5 ~ 1mm。
Compared with existing common malleable cast iron cylinder jacket, the beneficial effects of the invention are as follows：
Isothermal holding is carried out by the high temperature casting for forming water-cooled metal mould centrifugal casting, so as to form metallographic for bulk More than+95% pearlite of graphite+a small amount of ferritic ductile cast iron as-cast cylinder jacket, the cylinder jacket tensile strength reaches 500MPa More than, hardness is more than 230HB, and elongation percentage is more than 2.0%, relative to traditional malleable cast iron material cylinder jacket, cylinder tackling of the present invention Have the advantages that low with short production cycle, cost, elongation percentage and tensile strength height, wearability are good.
Brief description of the drawings
Fig. 1 is the photo that ductile cast iron as-cast cylinder jacket finished product wear surface graphite of the present invention amplifies 100 times, from Fig. 1 In it can be seen that the cylinder jacket finished product wear surface graphite type be essentially bulk；
Fig. 2 is the metallographic photograph that ductile cast iron as-cast cylinder jacket finished product wear surface matrix of the present invention amplifies 100 times Piece；
Fig. 3 is the metallographic photograph that ductile cast iron as-cast cylinder jacket finished product wear surface matrix of the present invention amplifies 500 times Piece；It can be seen that the cylinder jacket finished product wear surface matrix is by more than 95% pearlite+a small amount of ferrite group from Fig. 2, Fig. 3 Into.
Embodiment
The present invention is described in further detail below by way of preferred embodiment, but protection scope of the present invention is not limited to In this.
Embodiment 1
A kind of ductile cast iron as-cast cylinder jacket of centrifugal casting production, by weight percentage, its materials chemistry composition is：
The production method of the ductile cast iron as-cast cylinder jacket of above-mentioned centrifugal casting production, comprises the following steps：
1）Dispensing and melting：Using 500kg medium-frequency induction furnace meltings, weigh in proportion in addition to Ce, Bi and Al The carborundum of raw material and melting raw material gross mass 0.5%（Carbon content 40%~45%, silicone content 55%~60%, 1~2mm of granularity）Match somebody with somebody Raw material processed, is then smelted into iron liquid in 500kg medium-frequency induction furnaces, and smelting temperature is 1470 DEG C；Following current is used when going out iron liquid The mode of breeding adds the mixture for accounting for iron liquid weight 0.3%, being made up of carborundum, Ce and Bi（0.5~1mm of carborundum granularity）；
2）Casting：Using water-cooled metal mould wet coating material centrifugal casting technique produce cylinder sleeve cast part, 1430 DEG C of cast temperature, Casting machine rotating speed 1500r/min, 200 DEG C of mold preheating temperature, aluminium powder is added into wet coating material（Aluminium in raw material is with the shape of aluminium powder Formula is added, and the role of aluminium powder is：When the iron liquid of high temperature is entered in mould, it can be contacted with wet coating material and aluminium powder, a small amount of aluminium powder Graphite forming core can be promoted by entering iron liquid after fusing；Used aluminium powder produces for Henan Province Yuanyang Aluminum Industry Co., Ltd., model FLQG2#, 15~20 microns of average grain diameter, purity is more than 99.5%）, aluminium powder is accounted for the 0.5% of wet coating material and aluminium powder gross mass, painting Expect 1~2mm of thickness, casting weighs 3 ± 0.2Kg, 6 ± 1mm of casting section thickness, casting endoporus 35mm, control casting mold clearing temperature 850 ℃；
3）Cylinder Sleeve Castings are transferred to rapidly to 900 DEG C of vacuum drying oven after depanning（Model ZC2-65）Middle insulation 1 hour, then Furnace cooling, which is cooled to after 750 DEG C, again produces Cylinder Sleeve Castings air cooling of coming out of the stove.
The cylinder jacket finished product metallographic is more than+95% pearlite of temper carbon+a small amount of ferrite, and tensile strength reaches 550MPa, hardness reaches 260HB, and elongation percentage is 2.2%.
Embodiment 2
A kind of ductile cast iron as-cast cylinder jacket of centrifugal casting production, by weight percentage, its materials chemistry composition is：
The production method of the ductile cast iron as-cast cylinder jacket of above-mentioned centrifugal casting production, it comprises the following steps：
1）Dispensing and melting：Using 500kg medium-frequency induction furnace meltings, weigh in proportion in addition to Ce, Bi and Al The carborundum of raw material and melting raw material gross mass 3%（Carbon content 40%~45%, silicone content 55%~60%, 1~2mm of granularity）Prepare Raw material, is then smelted into iron liquid in 500kg medium-frequency induction furnaces, and smelting temperature is 1520 DEG C；It is pregnant using following current during molten iron discharging The mode of educating adds the mixture for accounting for iron liquid weight 0.5%, being made up of carborundum, Ce and Bi（0.5~1mm of carborundum granularity）；
2）Casting：Using water-cooled metal mould wet coating material centrifugal casting technique produce cylinder sleeve cast part, 1460 DEG C of cast temperature, Casting machine rotating speed 1600r/min, 230 DEG C of mold preheating temperature, aluminium powder is added into wet coating material（Aluminium in raw material is with the shape of aluminium powder Formula is added, and the role of aluminium powder is：When the iron liquid of high temperature is entered in mould, it can be contacted with wet coating material and aluminium powder, a small amount of aluminium powder Graphite forming core can be promoted by entering iron liquid after fusing；Used aluminium powder produces for Henan Province Yuanyang Aluminum Industry Co., Ltd., model FLQG2#, 15~20 microns of average grain diameter, purity is more than 99.5%）, aluminium powder is accounted for the 0.5% of wet coating material and aluminium powder gross mass, painting Expect 1~2mm of thickness, casting weighs 3 ± 0.2Kg, 6 ± 1mm of casting section thickness, casting endoporus 34mm, control casting mold clearing temperature 950 ℃；
3）Cylinder Sleeve Castings are transferred to rapidly to 900 DEG C of vacuum drying oven after depanning（Model ZC2-65）Middle insulation 1.5 hours, so Furnace cooling, which is cooled to after 750 DEG C, afterwards again produces Cylinder Sleeve Castings air cooling of coming out of the stove.
The cylinder jacket finished product metallographic is more than+95% pearlite of nodular graphite+a small amount of ferrite, and tensile strength reaches 540MPa, hardness reaches 280HB, and elongation percentage is 2.1%.

Claims (2)

1. a kind of production technology of the ductile cast iron as-cast cylinder jacket of centrifugal casting production, it is characterised in that with percentage by weight Count, the cylinder jacket chemical composition is：Carbon 2.7~3.2%, silicon 1.8~2.2%, 0 ＜ phosphorus ＜ 0.1%, 0.03 ＜ sulphur ＜ 0.06%, manganese 0.3~0.8%, boron 0.005~0.01%, copper 1.5~1.7%, bismuth 0.06~0.08%, cerium 0.06~0.08%, aluminium 0.002~ 0.004%, surplus is iron；
Production stage is as follows：
（1）Using medium-frequency induction furnace melting, the raw material in addition to bismuth, cerium and aluminium is weighed in proportion and melting raw material is accounted for The carborundum of gross mass 0.5~3%, smelting temperature is 1470~1520 DEG C；Mode bred using following current when going out iron liquid add and account for iron Liquid weight 0.3~0.5%, the mixture being made up of carborundum and cerium, bismuth；
（2）Cast：Cylinder sleeve cast part, cast temperature 1430~1460 are produced using water-cooled metal mould wet coating material centrifugal casting technique DEG C, casting machine 1300~1600r/min of rotating speed, 200 DEG C~230 DEG C of mold preheating temperature adds aluminium powder into wet coating material, makes aluminium Powder accounts for the 0.5% of wet coating material and aluminium powder gross mass, 1~2mm of paint thickness, and casting weighs 3 ± 0.2Kg, 6 ± 1mm of casting section thickness, casting Part 35 ± 1mm of endoporus, 850 DEG C~950 DEG C of control casting mold clearing temperature；
（3）Cylinder Sleeve Castings are transferred in 900 DEG C of vacuum drying oven after depanning and are incubated 1~2 hour, then furnace cooling is cooled to 750 Cylinder Sleeve Castings air cooling of coming out of the stove is produced again after DEG C.
2. the production technology of the ductile cast iron as-cast cylinder jacket of centrifugal casting production according to claim 1, its feature exists In step（1）The carborundum granularity that middle first time adds is 1 ~ 2mm；The carborundum granularity of second of addition is 0.5 ~ 1mm.
CN201510831366.8A 2015-11-25 2015-11-25 A kind of the ductile cast iron as-cast cylinder jacket and its production technology of centrifugal casting production Active CN105401063B (en)

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CN108441756A (en) * 2018-06-13 2018-08-24 中原内配集团安徽有限责任公司 A kind of wearability low-carbon cylinder jacket
CN110923565A (en) * 2019-12-17 2020-03-27 赵明 High-wear-resistance diesel engine matrix cylinder sleeve and production process thereof
CN113699435A (en) * 2021-08-26 2021-11-26 中原内配集团安徽有限责任公司 Wear-resistant high-strength cylinder sleeve and casting process thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1064425A (en) * 1992-02-03 1992-09-16 大连机车车辆工厂配件分厂 Alloy cast iron cylinder jacke centre spinning method and equipment

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0649585A (en) * 1992-07-29 1994-02-22 Kubota Corp Cast iron for cylinder liner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1064425A (en) * 1992-02-03 1992-09-16 大连机车车辆工厂配件分厂 Alloy cast iron cylinder jacke centre spinning method and equipment

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