CN106555100A - The preparation method of boron cast iron cylinder sleeve - Google Patents
The preparation method of boron cast iron cylinder sleeve Download PDFInfo
- Publication number
- CN106555100A CN106555100A CN201510625933.4A CN201510625933A CN106555100A CN 106555100 A CN106555100 A CN 106555100A CN 201510625933 A CN201510625933 A CN 201510625933A CN 106555100 A CN106555100 A CN 106555100A
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- CN
- China
- Prior art keywords
- cylinder sleeve
- cast iron
- preparation
- iron cylinder
- boron cast
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a kind of preparation method of boron cast iron cylinder sleeve, each composition and percentage by weight are C：3.5-3.7%, Si：2.5-2.8%, Mn：0.7-1.0%, B：0.04-0.045%, Cr：0.008-0.15%, balance of Fe.The preparation method of the boron cast iron cylinder sleeve of the present invention, not only high degree of automation, and low energy consumption, low stain, obtained foundry goods mechanical strength and hardness are good, the suitable popularization and application in production running, boron cast iron cylinder sleeve simple structure, design is ingenious, designed using various outer diameter surface, the combination installation and removal of the preparation method of easy boron cast iron cylinder sleeve arrange the protrusion of 3 layers of differing heights on surface, effectively increase the adhesion between part, the gap reduced between part, extends the service life of product, reduces oil consumption.
Description
Technical field
The present invention relates to engine fittings technical field, and in particular to a kind of preparation method of boron cast iron cylinder sleeve.
Background technology
Cylinder sleeve is cylinder jacket, is set in the cylinder barrel of cylinder body, collectively constitutes combustion chamber with piston and cylinder cap.Obviously, cylinder sleeve is the necessary accessory of engine chamber, and quality of the cylinder liner height directly affects the oil consumption of combustion chamber, affects the service life of engine.Existing cylinder sleeve typically adopts monoblock type, arranges raised on its surface, and for increasing the adhesion between bi-material, this structure extends the service life of engine to a certain extent, but is not met by use demand.
The content of the invention
Goal of the invention：For the deficiencies in the prior art, present invention aim at providing a kind of preparation method of boron cast iron cylinder sleeve so as to which, with good intensity and adhesion, oil consumption is low, the features such as long service life.
Technical scheme：In order to realize foregoing invention purpose, the technical solution used in the present invention is：
A kind of preparation method of boron cast iron cylinder sleeve, each composition of boron cast iron cylinder sleeve and percentage by weight are C：3.5-3.7%, Si：2.5-2.8%, Mn：0.7-1.0%, B：0.04-0.045%, Cr：0.008-0.15%, balance of Fe；Preparation process is：
1）Melting：The pig iron, steel scrap, foundry returns are taken by composition, appropriate alloy is added, the melting in intermediate frequency furnace so as to be fused into molten iron；
2）Mould is sprayed：Sprayed coating in a mold, wherein, spraying mold 400 ± 10r/min of rotating speed, spraying 240 ± 10mm/sec of the speed of travel, sprays 0.1 ~ 02MPa of air pressure, spraying 0.3 ~ 0.5MPa of pump pressure, sprayed coating 45 ± 5s of viscosity, sprayed coating moisture 80 ± 1%, sprayed coating 800 ± 20g/10s of spray volume；
3）Cast：The silicon titanate innoculant for accounting for that weight of molten iron percentage is 0.5 ± 0.1% is added to melt iron, is subsequently poured in mould；Setting cast cool time, allow molten iron in mould into shaping；Poring rate 500r/min, duration of pouring 65s, cooling velocity 500r/min, cooling water spraying time are adjusted according to mold temperature；
4）The demoulding：Blank is extracted from mould, is processed after carrying out；Then, the remaining coating cleared up on mould, carries out spraying Posterior circle use.
The preparation method of described boron cast iron cylinder sleeve, smelting temperature are 1550 ± 20 DEG C.
The preparation method of described boron cast iron cylinder sleeve, 390 ± 20 DEG C of spraying mold temperature.
The preparation method of described boron cast iron cylinder sleeve, each composition of boron cast iron cylinder sleeve and percentage by weight are C：3.6-3.7%, Si：2.6-2.8%, Mn：0.8-1.0%, B：0.04-0.045%, Cr：0.009-0.15%, balance of Fe.
The preparation method of described boron cast iron cylinder sleeve, each composition of boron cast iron cylinder sleeve and percentage by weight are C：3.6-3.7%, Si：2.7-2.8%, Mn：0.9-1.0%, B：0.04-0.045%, Cr：0.01-0.15%, balance of Fe.
Beneficial effect：Compared with prior art, the preparation method of the boron cast iron cylinder sleeve of the present invention, not only high degree of automation, and low energy consumption, low stain, obtained foundry goods mechanical strength and hardness are good, the suitable popularization and application in production running, prepared boron cast iron cylinder sleeve simple structure, is designed ingenious, is designed using various outer diameter surface, the easily combination installation and removal of the preparation method of boron cast iron cylinder sleeve, the protrusion of 3 layers of differing heights is set on surface, the adhesion between part is effectively increased, the gap reduced between part, the service life of product is extended, oil consumption is reduced.
Description of the drawings
Fig. 1 is the structural representation of the preparation method of boron cast iron cylinder sleeve；
Fig. 2 is the surface texture schematic diagram of the preparation method of boron cast iron cylinder sleeve.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, the preparation method of boron cast iron cylinder sleeve, mainly includes liner body 1 and liner backs 2, and the protrusion that three layer height of upper, middle and lower is not waited, as lower floor's protrusion 10, middle level protrusion 11 and upper strata protrusion 12 are provided with liner backs 2；Lower floor's protrusion 10, middle level protrusion 11 and upper strata protrusion 12 can be regular or irregularly shaped for cylindricality, taper, scarf, spill, ripple type, zigzag, spherical, umbrella shape, mushroom-shaped etc., the conventional or shape that is of little use, three layers of protrusion can also can be mutually different raised or two of which identical protrusion for the protrusion of same shape, it is preferred that different, wherein lower floor's protrusion height 10 is less than 0.1mm, protrusion 11 height in middle level is 0.1-0.9mm, upper strata protrusion height is more than 0.9mm, less than 1.3mm.The protrusion of 3 layers of differing heights is set on surface, the adhesion between part is effectively increased, the gap reduced between part extends the service life of product, reduces oil consumption.
Concave surface is equipped with the both sides of liner backs 2, as the first concave surface 3 and the second concave surface 4, first concave surface 3 extends to the upper port 8 of liner body 1, second concave surface 4 all extends to the lower port 9 of liner body 1, first domatic 5 is set in the inner side of upper port 8, the the 2nd domatic 6 is set in the outside of upper port 8, the 3rd concave surface 7 is provided with the inner wall edge of lower port 9.The external diameter of the first concave surface 3, the second concave surface 4 and liner backs 2 increases successively, is designed using various outer diameter surface, the combination installation and removal of the preparation method of easy boron cast iron cylinder sleeve.
Each composition of the boron cast iron cylinder sleeve and percentage by weight are C：3.5-3.7%, Si：2.5-2.8%, Mn：0.7-1.0%, B：0.04-0.045%, Cr：0.008-0.15%, balance of Fe；Preparation process is：
1）Melting：The pig iron, steel scrap, foundry returns are taken by composition, appropriate alloy is added, the melting in intermediate frequency furnace so as to be fused into molten iron；Smelting temperature is 1550 ± 20 DEG C.
2）Mould is sprayed：Sprayed coating in a mold, wherein, spraying mold 400 ± 10r/min of rotating speed, spraying 240 ± 10mm/sec of the speed of travel, sprays 0.1 ~ 02MPa of air pressure, spraying 0.3 ~ 0.5MPa of pump pressure, sprayed coating 45 ± 5s of viscosity, sprayed coating moisture 80 ± 1%, sprayed coating 800 ± 20g/10s of spray volume；390 ± 20 DEG C of spraying mold temperature.
3）Cast：The silicon titanate innoculant for accounting for that weight of molten iron percentage is 0.5 ± 0.1% is added to melt iron, is subsequently poured in mould；Setting cast cool time, allow molten iron in mould into shaping；Poring rate 500r/min, duration of pouring 65s, cooling velocity 500r/min, cooling water spraying time are adjusted according to mold temperature；
4）The demoulding：Blank is extracted from mould, is processed after carrying out；Then, the remaining coating cleared up on mould, carries out spraying Posterior circle use.
The preparation method of boron cast iron cylinder sleeve, each composition and percentage by weight are preferably C：3.6-3.7%, Si：2.6-2.8%, Mn：0.8-1.0%, B：0.04-0.045%, Cr：0.009-0.15%, balance of Fe.Preferably C：3.6-3.7%, Si：2.7-2.8%, Mn：0.9-1.0%, B：0.04-0.045%, Cr：0.01-0.15%, balance of Fe.
The casting flaws such as the preparation method pore-free of the boron cast iron cylinder sleeve, slag inclusion, cast(ing) surface is every square centimeter to be uniformly distributed 10-12 protrusion, and metallographic structure meets JB/T5082-91《Internal combustion engine boron cast-iron cylinder jacket metallographic structure》Require, mechanical strength is not less than HT200, hardness HRB90-104.
Claims (5)
1. a kind of preparation method of boron cast iron cylinder sleeve, it is characterised in that：Each composition of boron cast iron cylinder sleeve and percentage by weight are C：3.5-3.7%, Si：2.5-2.8%, Mn：0.7-1.0%, B：0.04-0.045%, Cr：0.008-0.15%, balance of Fe；Preparation process is：
1）Melting：The pig iron, steel scrap, foundry returns are taken by composition, appropriate alloy is added, the melting in intermediate frequency furnace so as to be fused into molten iron；
2）Mould is sprayed：Sprayed coating in a mold, wherein, spraying mold 400 ± 10r/min of rotating speed, spraying 240 ± 10mm/sec of the speed of travel, sprays 0.1 ~ 02MPa of air pressure, spraying 0.3 ~ 0.5MPa of pump pressure, sprayed coating 45 ± 5s of viscosity, sprayed coating moisture 80 ± 1%, sprayed coating 800 ± 20g/10s of spray volume；
3）Cast：The silicon titanate innoculant for accounting for that weight of molten iron percentage is 0.5 ± 0.1% is added to melt iron, is subsequently poured in mould；Setting cast cool time, allow molten iron in mould into shaping；Poring rate 500r/min, duration of pouring 65s, cooling velocity 500r/min, cooling water spraying time are adjusted according to mold temperature；
4）The demoulding：Blank is extracted from mould, is processed after carrying out；Then, the remaining coating cleared up on mould, carries out spraying Posterior circle use.
2. the preparation method of boron cast iron cylinder sleeve according to claim 1, it is characterised in that：Smelting temperature is 1550 ± 20 DEG C.
3. the preparation method of boron cast iron cylinder sleeve according to claim 1, it is characterised in that：390 ± 20 DEG C of spraying mold temperature.
4. the preparation method of boron cast iron cylinder sleeve according to claim 1, it is characterised in that：Each composition of boron cast iron cylinder sleeve and percentage by weight are C：3.6-3.7%, Si：2.6-2.8%, Mn：0.8-1.0%, B：0.04-0.045%, Cr：0.009-0.15%, balance of Fe.
5. the preparation method of boron cast iron cylinder sleeve according to claim 1, it is characterised in that：Each composition of boron cast iron cylinder sleeve and percentage by weight are C：3.6-3.7%, Si：2.7-2.8%, Mn：0.9-1.0%, B：0.04-0.045%, Cr：0.01-0.15%, balance of Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510625933.4A CN106555100A (en) | 2015-09-28 | 2015-09-28 | The preparation method of boron cast iron cylinder sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510625933.4A CN106555100A (en) | 2015-09-28 | 2015-09-28 | The preparation method of boron cast iron cylinder sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106555100A true CN106555100A (en) | 2017-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510625933.4A Pending CN106555100A (en) | 2015-09-28 | 2015-09-28 | The preparation method of boron cast iron cylinder sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106555100A (en) |
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2015
- 2015-09-28 CN CN201510625933.4A patent/CN106555100A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170405 |
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| WD01 | Invention patent application deemed withdrawn after publication |