CN106756453A - A kind of thick and large section gray cast iron cylinder jacket organizational controls method - Google Patents
A kind of thick and large section gray cast iron cylinder jacket organizational controls method Download PDFInfo
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- CN106756453A CN106756453A CN201611065299.4A CN201611065299A CN106756453A CN 106756453 A CN106756453 A CN 106756453A CN 201611065299 A CN201611065299 A CN 201611065299A CN 106756453 A CN106756453 A CN 106756453A
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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
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- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
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Abstract
The invention discloses a kind of thick and large section gray cast iron cylinder jacket organizational controls method, following steps are specifically included：Step 1, dispensing：It is primary raw material from high-quality steel scrap, foundry pig iron and foundry return, carburant, ferrosilicon, ferromanganese, ferrophosphorus, sulphur iron, ferro-boron, copper and vanadium iron is matched somebody with somebody further according to iron liquid composition range；Step 2, melting：Using intermediate frequency furnace melting, following steps are specifically included：A) feed intake fusing；B) superheating and standing；C) inoculation；Step 3, cast：The molten iron that temperature is 1340~1350 DEG C is injected in sand mold and is molded, when 1/5~1/3 molten iron is poured into a mould, be uniformly added into the inovulant that granularity is 0.4~1mm；Step 4, cools down stage by stage.By controlling the outside cooling condition of cylinder jacket difference solidification stages, cooling velocity is controlled, improve the tissue and performance uniformity of cylinder jacket, reduction microshrinkage is loose, and is easy to grasp and operates.
Description
Technical field
The invention belongs to casting technology field, it is related to a kind of thick and large section gray cast iron cylinder jacket organizational controls method.
Background technology
The core component gray cast iron cylinder jacket of boat diesel engine, long-term work is in work condition environments such as high temperature, high speed, high pressures
Under, the quality of its performance and inherent quality directly affects the life and reliability of boat diesel engine, and its performance mainly depends on
In the graphite form and matrix at gray cast iron cylinder jacket thick and large section position.More than 3 tons of gray cast iron cylinder jacket casting weight, length
Degree is more than 150mm more than 2500mm, thickest, it is desirable to which graphite form is sheet A types, and 2~4 grades of length does not allow appearance not
(A type graphite length is long or thick for good graphite form；D types, E type graphite；Blocky graphite)；Matrix is sheet pearly-lustre
Body, iron phosphide eutectic and carbide in matrix should be evenly distributed.
In actual production, inside thick and large section castings of gray cast iron, it may appear that A type graphite length is long or thick, and
The loose phenomenon of microshrinkage so that edge and centre structural homogenity are poor, thick and large section edge can also go out sometimes in addition
Existing D type graphite, this has just had a strong impact on the mechanical property of cast iron.
In order to control the structural state of thick and large section, except using conventional rising head, chill etc. in existing processing method
Outside mode, the cooling velocity of thick and large section gray iron casting is controlled also by way of improving molding sand and coating, shorten its cooling
Time, graphite is set to be grown up without the sufficient time.
Chinese patent (the patent No.：ZL201410512427.X, patent name：One kind improves thick and large section Graphite Type in Gray Iron
The method of grade, publication number：104263888, publication date：2015.01.07 a kind of heat conduction higher of utilization chrome ore) is disclosed
Coefficient and heat storage coefficient, the method for improving thick and large section gray cast iron (150mm × 150mm × 150mm) graphite grade, but this side
Method is more than for the cylinder sleeve cast part of 2500mm for weight more than 3 tons, length, DeGrain.
Additionally, also having angle manufacture gray cast iron cylinder jacket of the part producer from casting method, Chinese patent (patent
Number：ZL201510084208.0, patent name：Marine low speed diesel engine cylinder sleeve cast method, publication number：104762547, it is public
Open day：2015.07.08 a kind of marine low speed diesel engine cylinder sleeve cast method) is disclosed, graphite, hard phase shape can be improved
State and distribution, but without the open content influenceed on thick and large section tissue graphite form and matrix.
Chinese patent (the patent No.：ZL200510027454.9, patent name：The casting method of marine large-diameter cylinder liner)
A kind of casting method of marine large-diameter cylinder liner is disclosed, wherein being not directed to how to control thick and large section structural state.
The above method does not refer to the uniformity of control gray cast iron cylinder jacket casting thick and large section site tissue and performance
Method, gray cast iron cylinder jacket casting thick and large section tissue and performance by factors such as growth of graphite mode, distributional patterns due to being influenceed
And it is unqualified, its basic reason is the control of raw material, chemical composition, bonded hard ferrite magnet, inoculated technology and cooling condition, is caused
There is a problem of that microstructure is uneven and microshrinkage is loose inside cylinder jacket thick and large section.
The content of the invention
It is an object of the invention to provide a kind of thick and large section gray cast iron cylinder jacket organizational controls method, thick and large section is solved
Even tissue sex chromosome mosaicism and the loose problem of microshrinkage.
The technical solution adopted in the present invention is that a kind of thick and large section gray cast iron cylinder jacket organizational controls method is specific to wrap
Include following steps：
Step 1, dispensing：
From high-quality steel scrap, foundry pig iron and foundry return be primary raw material, further according to iron liquid composition range with carburant,
Ferrosilicon, ferromanganese, ferrophosphorus, sulphur iron, ferro-boron, copper and vanadium iron, make each alloying component control in following scope：Carbon：3.0~3.3%；
Silicon：1.1~1.2%；Manganese：0.65~0.75%；Phosphorus 0.20~0.25%；Sulphur：0.04~0.08%；Boron：0.02~0.03%；
Copper：1.20~1.50%；Vanadium 0.05~0.15%, the above is all weight percentage, and remaining is iron；
Step 2, melting：Using intermediate frequency furnace melting, following steps are specifically included：A) feed intake fusing；B) superheating and standing；C) it is pregnant
Educate treatment；
Step 3, cast：The molten iron that temperature is 1340~1350 DEG C is injected in sand mold and is molded, when 1/5~1/3 iron of cast
During water, the inovulant that granularity is 0.4~1mm is uniformly added into；
Step 4, cools down stage by stage.
The features of the present invention is also resided in,
Wherein raw material proportioning is in step 1：The pig iron of+30% foundry return of 60% steel scrap+10%.
The feed intake detailed processes of fusing of step a) are wherein in step 2：The pig iron is added into furnace bottom, part steel scrap is added,
Half carburant is added during molten metal bath to appear, is continued plus steel scrap, when load melting 1/3~1/2, add remaining carburetting
Agent, adds foundry returns after steel scrap is added, and all sequentially adds ferrosilicon, ferromanganese, ferrophosphorus, sulphur iron, ferro-boron, copper and vanadium after fusing
Iron；
The detailed process of step b) superheating and standings is wherein in step 2：After being melted through step a, molten iron temperature is heated to
1500~1520 DEG C, 5~10min is incubated, is cooled to 1460~1480 DEG C of tapping temperature；
The detailed process of step c) inoculations is wherein in step 2：When tap a blast furnace 1/5~1/3 when be uniformly added into granularity for 3
The inovulant of~7mm, the addition of inovulant is melt out iron 0.3~0.5%.
Wherein step 2 the step of c) in inovulant be rare earth calcium barium composite inoculant.
Inovulant is rare earth calcium barium composite inoculant wherein in step 3, and the addition of inovulant is melt out iron 0.1
~0.3%.
The detailed process that wherein step 4 is cooled down stage by stage：Graphite chilling block rapid cooling is used first, solidifies cylinder jacket outer surface
Crust, sets up intensity；Then when cylinder sleeving temperature is 780 DEG C~830 DEG C, knockout of unpacking, by the cooling of cylinder jacket thick and large section
To room temperature, the cylinder sleeve cast part of target materials is obtained final product.
The beneficial effects of the invention are as follows by controlling the outside cooling condition of cylinder jacket difference solidification stages, control cooling
Speed, improves the tissue and performance uniformity of cylinder jacket, and reduction microshrinkage is loose, and is easy to grasp and operates.
Brief description of the drawings
Fig. 1 is cylinder jacket thick and large section sampling schematic diagram of the invention；
Fig. 2 is that the cylinder jacket that a kind of thick and large section gray cast iron cylinder jacket organizational controls method example 2 of the invention is produced is thick
Metallographic structure (100 times) figure of position (at E) is surveyed in big cross section；
Fig. 3 is thick by the cylinder jacket that a kind of thick and large section gray cast iron cylinder jacket organizational controls method example 2 of the invention is produced
Metallographic structure (100 times) figure in big cross section centre (at F)；
Fig. 4 is thick by the cylinder jacket that a kind of thick and large section gray cast iron cylinder jacket organizational controls method example 2 of the invention is produced
Metallographic structure (100 times) figure at big cross section exterior measuring position (at G).
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
A kind of thick and large section gray cast iron cylinder jacket organizational controls method of the present invention, specifically includes following steps：
Step 1, dispensing：It is primary raw material from high-quality steel scrap, foundry pig iron and foundry return, raw material proportioning is：60%
The pig iron of the foundry return of steel scrap+30%+10%, further according to iron liquid composition range with carburant (carburant is cast iron carburant), silicon
Iron, ferromanganese, ferrophosphorus, sulphur iron, ferro-boron, copper and vanadium iron, make each alloying component control in following scope：Carbon：3.0~3.3%；
Silicon：1.1~1.2%；Manganese：0.65~0.75%；Phosphorus 0.20~0.25%；Sulphur：0.04~0.08%；Boron：0.02~0.03%；
Copper：1.20~1.50%；Vanadium 0.05~0.15%, the above is all weight percentage, and remaining is iron；
Carburant be incorporated as iron liquid there is provided a large amount of Dispersed precipitates heterogeneous crystallization nuclei, reduce the supercooling of iron liquid
Degree, promotes graphite structure of the generation based on A type graphite, is evenly distributed；By controlling the degree of purity of molten metal in fusion process,
Harmful element content is reduced, suppresses influence of the harmful element to graphite form, be conducive to improving and organize.
Step 2, melting：Using intermediate frequency furnace melting, following steps are specifically included：
A) feed intake fusing：The pig iron is added into furnace bottom, part steel scrap is added, adds half to increase during molten metal bath to appear
Carbon agent, continues plus steel scrap, when load melting 1/3~1/2, adds remaining carburant, foundry returns is added after steel scrap is added, entirely
Ferrosilicon, ferromanganese, ferrophosphorus, sulphur iron, ferro-boron, copper and vanadium iron are sequentially added after portion's fusing；
B) superheating and standing：After being melted through step a, molten iron temperature is heated to 1500~1520 DEG C, is incubated 5~10min, drop
Temperature is to 1460~1480 DEG C of tapping temperature；
C) inoculation：When tap a blast furnace 1/5~1/3 when be uniformly added into the inovulant that granularity is 3~7mm, the addition of inovulant
Measure to melt out the 0.3~0.5% of iron, inovulant is rare earth calcium barium composite inoculant；
Step 3, cast：The molten iron that temperature is 1340~1350 DEG C is injected in sand mold and is molded, when 1/5~1/3 iron of cast
During water, the inovulant that granularity is 0.4~1mm is uniformly added into, inovulant is rare earth calcium barium composite inoculant, the addition of inovulant
To melt out the 0.1~0.3% of iron；
The composite inoculant added in step 2 and step 3 breaks the continuous net-shaped distribution of iron phosphide eutectic, it is turned into equal substantially
The bulk or point-like of even distribution, trace element therein are conducive to the formation of A type graphite.
Step 4, cools down stage by stage：Graphite chilling block rapid cooling is used first, cylinder jacket outer surface is solidified crust, set up strong
Degree；Then when cylinder sleeving temperature is 780 DEG C~830 DEG C, cylinder jacket thick and large section is cooled to room temperature by knockout of unpacking, and makes gas
Cylinder sleeve thick and large section solidifies, and obtains the cylinder sleeve cast part of target materials.
By controlling the outside cooling condition of cylinder jacket difference solidification stages in step 4, cooling velocity is controlled, improve gas
The tissue and performance uniformity of cylinder sleeve, reduction microshrinkage are loose, and are easy to grasp and operate.
Embodiment 1
The each component and percentage by weight of thick and large section cylinder cover material be：Carbon 3.0%；Silicon 1.15%；Manganese 0.65%；Phosphorus
0.20%；Sulphur 0.04%；Boron 0.02%；Copper 1.2%；Vanadium 0.05%, remaining is Fe.By above-mentioned material according to given component
Dispensing is carried out, then melting is carried out with middle frequency furnace, the pig iron is added into furnace bottom during melting, add part steel scrap, it is to appear molten
Half carburant is added when melting molten metal, is continued plus steel scrap, when load melting 1/3, add remaining carburant, steel scrap to be added
After add foundry returns, all sequentially add ferrosilicon, ferromanganese, ferrophosphorus, sulphur iron, ferro-boron, copper and vanadium iron after fusing；Again by molten iron temperature
Be heated to 1500 DEG C, be incubated 5min, be cooled to 1460 DEG C of tapping temperature, when tap a blast furnace 1/5 when be uniformly added into the rare earth that granularity is 3mm
Calcium barium composite inoculant, the addition of inovulant is melt out iron 0.3%；Then the molten iron that temperature is 1340 DEG C is injected
In sand mold be molded, when pour into a mould 1/5 molten iron when, be uniformly added into granularity be 0.4mm rare earth calcium barium composite inoculant, inovulant plus
It is melt out iron 0.1% to enter amount；Finally, casting is cooled down；Carried out by the multi-point temperature measurement thermocouple of pre-plugged
Real time temperature measurement, when cylinder sleeving temperature is 780 DEG C, cylinder jacket thick and large section is cooled to room temperature by knockout of unpacking, and makes cylinder jacket thick
Big cross section solidifies, and obtains the cylinder sleeve cast part of target materials.
Embodiment 2
The each component and percentage by weight of thick and large section cylinder cover material be：Carbon 3.2%；Silicon 1.1%；Manganese 0.7%；Phosphorus
0.22%；Sulphur 0.06%；Boron 0.022%；Copper 1.5%；Vanadium 0.1%, remaining is Fe.By above-mentioned material according to given component
Dispensing is carried out, then melting is carried out with middle frequency furnace, the pig iron is added into furnace bottom during melting, add part steel scrap, it is to appear molten
Half carburant is added when melting molten metal, is continued plus steel scrap, when load melting 1/2, add remaining carburant, steel scrap to be added
After add foundry returns, all sequentially add ferrosilicon, ferromanganese, ferrophosphorus, sulphur iron, ferro-boron, copper and vanadium iron after fusing；Again by molten iron temperature
Be heated to 1515 DEG C, be incubated 10min, be cooled to 1480 DEG C of tapping temperature, when tap a blast furnace 1/3 when to be uniformly added into granularity dilute for 7mm
Native calcium barium composite inoculant, the addition of inovulant is melt out iron 0.5%；Then the molten iron that temperature is 1345 DEG C is noted
Enter in sand mold and be molded, when 1/3 molten iron is poured into a mould, be uniformly added into the rare earth calcium barium composite inoculant that granularity is 1mm, inovulant plus
It is melt out iron 0.3% to enter amount；Finally, casting is cooled down, is carried out by the multi-point temperature measurement thermocouple of pre-plugged
Real time temperature measurement, when cylinder sleeving temperature is 790 DEG C, cylinder jacket thick and large section is cooled to room temperature by knockout of unpacking, and makes cylinder jacket thick
Big cross section solidify, obtain the cylinder sleeve cast part of target materials, casting section thickness 151mm, on the inside of wall thickness, center, outside left
Sampling, carries out the detection of metallographic and mechanical property, and Fig. 1 is seen in sample position, and metallographic structure is shown in Fig. 2,3 and 4 (in Fig. 2,3,4 respectively
Figure (a) represents graphite form；(b) matrix), test result is shown in Table 1.
Table 1
From the analysis result in table 1, using thick and large section microstructure of grey cast iron control method of the invention, can be expired
" graphite form is sheet A types, 2~4 grades of length to foot；Matrix is sheet pearlite, iron phosphide eutectic and carbonization in matrix
Thing should be evenly distributed " technical requirements, and the method is easily operated, is easy to control.
Embodiment 3
The each component and percentage by weight of thick and large section cylinder cover material be：Carbon 3.3%；Silicon 1.2%；Manganese 0.75%；Phosphorus
0.25%；Sulphur 0.08%；Boron 0.03%；Copper 1.35%；Vanadium 0.15%, remaining is Fe.By above-mentioned material according to given group
Dividing carries out dispensing, then carries out melting with middle frequency furnace, and the pig iron is added into furnace bottom during melting, adds part steel scrap, to appear
Half carburant is added during molten metal bath, is continued plus steel scrap, when load melting 2/5, add remaining carburant, wait to add useless
Foundry returns is added after steel, all ferrosilicon, ferromanganese, ferrophosphorus, sulphur iron, ferro-boron, copper and vanadium iron is sequentially added after fusing；Again by molten iron temperature
Degree is heated to 1520 DEG C, is incubated 8min, is cooled to 1470 DEG C of tapping temperature, when tap a blast furnace 1/4 when to be uniformly added into granularity dilute for 5mm
Native calcium barium composite inoculant, the addition of inovulant is melt out iron 0.4%；Then the molten iron that temperature is 1350 DEG C is noted
Enter shaping in sand mold, when 1/4 molten iron is poured into a mould, be uniformly added into the rare earth calcium barium composite inoculant that granularity is 0.8mm, inovulant
Addition is melt out iron 0.2%；Finally, casting is cooled down, is entered by the multi-point temperature measurement thermocouple of pre-plugged
Row real time temperature measurement, when cylinder sleeving temperature is 830 DEG C, cylinder jacket thick and large section is cooled to room temperature by knockout of unpacking, and makes cylinder jacket
Thick and large section solidifies, and obtains the cylinder sleeve cast part of target materials.
A kind of the characteristics of each step of thick and large section gray cast iron cylinder jacket organizational controls method of the present invention is：
1) material composition control：By steel scrap recarburization process, pig iron consumption is reduced, thick graphite structure is lost in weakening the pig iron
The influence of transmissibility and harmful element to tissue and performance.The iron liquid that is incorporated as of carburant provides the heterogeneous of a large amount of Dispersed precipitates
Crystallization nuclei, reduces the degree of supercooling of iron liquid, promotes graphite structure of the generation based on A type graphite, and is evenly distributed, from basic
The upper form for improving graphite, improves the performance of alloy cast iron.The degree of purity of raw material is organized to it and performance also has very big simultaneously
Influence, thick graphite has certain genotype in pig iron original structure, in usual fusion process, the thick graphite in the pig iron
Can not be completely melt, cause c-type graphite occur in new synthetic cast iron tissue, so as to influence tissue and performance.A certain amount of V energy
Promote and refine pearlite, and tiny, equally distributed iron phosphide eutectic can improve the wearability and mechanical property of casting, if melt
Degree of purity is not high, can aggravate carbide and the unfavorable distribution of iron phosphide eutectic.Therefore the pig iron of high-quality, steel scrap should be selected should select surface matter
The steel scrap of amount and high purity.
2) superheating and standing：Superheating and standing is conducive to absorption and the homogenization of carburant, is conducive to the refinement of graphite, is conducive to
The degree of purity of iron liquid is improved, but iron liquid can then reduce iron liquid nucleation ability in high temperature (more than 1520 DEG C) long-time heat preservation, make
Deteriorate into graphite form, produce bad graphite form (D types, E types graphite), therefore the temperature of superheating and standing, time should be carried out
Control.
3) inoculation (technique for having inoculation in step 2 of the invention and step 3)：Inoculation is to graphite shape
The influence of state is larger, the curing condition its role is to change cast iron eutectic crystallization, reaches elimination spoken parts in traditional operas, promotes graphitization, thin
Change crystal grain, refine flake graphite and undercooled graphite is changed into non-directional uniform A type graphite, improve performance and even tissue
Property.But inoculation fade can cause casting graphite form unstable, easily there are D type undercooled graphites.Phosphorus in gray cast iron cylinder jacket
The crystal boundary of structure of cast iron can be present in the form of iron phosphide eutectic, and in the big net distribution of continuous coarse, seriously isolate matrix, significantly drop
The mechanical strength of low cast iron, increases fragility, and the rare earth in composite inoculant can break the continuous net-shaped distribution of iron phosphide eutectic, make its base
This turns into equally distributed block or point-like, so that improve mechanical strength, reduces fragility；The trace elements such as calcium, barium are conducive to A types
The formation of graphite.
4) cool down stage by stage：For this thick and large section cylinder jacket (thick and large section >=150mm diesel engines that the present invention is used
Cylinder jacket), cooled slow, the time that graphite has abundance grows up, thicker, has a strong impact on the mechanical property of cast iron；Cooling velocity mistake
Hurry up, then can cause the generation of D type graphite, so as to influence its performance.The present invention is by controlling the outer of cylinder jacket difference solidification stages
Portion's cooling condition carries out emphasis cooling stage by stage, i.e., use graphite chilling block rapid cooling first, makes cylinder jacket outer surface quick solidification knot
Shell, sets up intensity, when surface solidification thickness degree reaches to a certain degree, when internal large area is in mushy zone, carries out simultaneously solidifying
Gu cooling treatment, makes cylinder jacket thick and large section solidify simultaneously, so as to improve structural homogenity, microshrinkage is reduced loose.
Claims (6)
1. a kind of thick and large section gray cast iron cylinder jacket organizational controls method, it is characterised in that：Specifically include following steps：
Step 1, dispensing：
It is primary raw material from high-quality steel scrap, foundry pig iron and foundry return, carburant, silicon is matched somebody with somebody further according to iron liquid composition range
Iron, ferromanganese, ferrophosphorus, sulphur iron, ferro-boron, copper and vanadium iron, make each alloying component control in following scope：Carbon：3.0~3.3%；
Silicon：1.1~1.2%；Manganese：0.65~0.75%；Phosphorus 0.20~0.25%；Sulphur：0.04~0.08%；Boron：0.02~0.03%；
Copper：1.20~1.50%；Vanadium 0.05~0.15%, the above is all weight percentage, and remaining is iron；
Step 2, melting：Using intermediate frequency furnace melting, following steps are specifically included：A) feed intake fusing；B) superheating and standing；C) womb
Reason；
Step 3, cast：The molten iron that temperature is 1340~1350 DEG C is injected in sand mold and is molded, when 1/5~1/3 molten iron is poured into a mould,
It is uniformly added into the inovulant that granularity is 0.4~1mm；
Step 4, cools down stage by stage.
2. a kind of thick and large section gray cast iron cylinder jacket organizational controls method according to claim 1, it is characterised in that：It is described
Raw material proportioning is in step 1：The pig iron of+30% foundry return of 60% steel scrap+10%.
3. a kind of thick and large section gray cast iron cylinder jacket organizational controls method according to claim 1, it is characterised in that：It is described
The feed intake detailed processes of fusing of step a) are in step 2：The pig iron is added into furnace bottom, part steel scrap, melting gold to appear is added
Half carburant is added during category liquid, is continued plus steel scrap, when load melting 1/3~1/2, add remaining carburant, wait to add useless
Foundry returns is added after steel, all ferrosilicon, ferromanganese, ferrophosphorus, sulphur iron, ferro-boron, copper and vanadium iron is sequentially added after fusing；
The detailed process of step b) superheating and standings is in the step 2：After being melted through step a, molten iron temperature is heated to 1500
~1520 DEG C, 5~10min is incubated, is cooled to 1460~1480 DEG C of tapping temperature；
The detailed process of step c) inoculations is in the step 2：When tap a blast furnace 1/5~1/3 when be uniformly added into granularity for 3~
The inovulant of 7mm, the addition of inovulant is melt out iron 0.3~0.5%.
4. a kind of thick and large section gray cast iron cylinder jacket organizational controls method according to claim 3, it is characterised in that：It is described
Inovulant is rare earth calcium barium composite inoculant in the step of step 2 c).
5. a kind of thick and large section gray cast iron cylinder jacket organizational controls method according to claim 1, it is characterised in that：It is described
Inovulant is rare earth calcium barium composite inoculant in step 3, and the addition of inovulant is melt out iron 0.1~0.3%.
6. a kind of thick and large section gray cast iron cylinder jacket organizational controls method according to claim 1, it is characterised in that：It is described
The detailed process that step 4 is cooled down stage by stage：Graphite chilling block rapid cooling is used first, cylinder jacket outer surface is solidified crust, set up strong
Degree；Then when cylinder sleeving temperature is 780 DEG C~830 DEG C, cylinder jacket thick and large section is cooled to room temperature by knockout of unpacking, and is obtained final product
The cylinder sleeve cast part of target materials.
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Cited By (4)
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| CN109014048A (en) * | 2018-10-19 | 2018-12-18 | 淄柴动力有限公司 | The casting production process and device of boron cast iron cylinder sleeve |
| CN113462954A (en) * | 2021-06-12 | 2021-10-01 | 山东华盛农业药械有限责任公司 | Material formula of wear-resistant cylinder sleeve of gasoline engine |
| CN113652598A (en) * | 2021-08-04 | 2021-11-16 | 苏州勤堡精密机械有限公司 | Zirconium-cerium alloy gray iron casting |
| CN109014048B (en) * | 2018-10-19 | 2024-07-02 | 淄柴动力有限公司 | Casting production process and device for boron cast iron cylinder sleeve |
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| CN109014048A (en) * | 2018-10-19 | 2018-12-18 | 淄柴动力有限公司 | The casting production process and device of boron cast iron cylinder sleeve |
| CN109014048B (en) * | 2018-10-19 | 2024-07-02 | 淄柴动力有限公司 | Casting production process and device for boron cast iron cylinder sleeve |
| CN113462954A (en) * | 2021-06-12 | 2021-10-01 | 山东华盛农业药械有限责任公司 | Material formula of wear-resistant cylinder sleeve of gasoline engine |
| CN113652598A (en) * | 2021-08-04 | 2021-11-16 | 苏州勤堡精密机械有限公司 | Zirconium-cerium alloy gray iron casting |
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| CN106756453B (en) | 2018-06-22 |
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