CN105755359A - Production technology of material applicable to cylinder body and cylinder cover of diesel engine - Google Patents
Production technology of material applicable to cylinder body and cylinder cover of diesel engine Download PDFInfo
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- CN105755359A CN105755359A CN201610111025.8A CN201610111025A CN105755359A CN 105755359 A CN105755359 A CN 105755359A CN 201610111025 A CN201610111025 A CN 201610111025A CN 105755359 A CN105755359 A CN 105755359A
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- Prior art keywords
- molten iron
- iron
- carburant
- inovulant
- foundry returns
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Materials 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 relates to a production technology of a material applicable to the cylinder body and cylinder cover of a diesel engine, belonging to the field of casting technology. The technology comprises seven steps: equipment preparation, dosing, feeding, melting, adjustment of chemical components of molten iron, inoculation and pouring. By adopting the technology, the carbon saturation degree Sc of the molten iron of the cylinder body and cylinder cover material of the diesel engine is controlled to 0.9-0.93, the carbon equivalent CE is controlled to 3.95-4.1, and the molten iron fluidity and casting manufacturability are guaranteed; and meanwhile, the ripeness grade RG of the molten iron can reach 113%, the inoculation effect is guaranteed, and the potential of the material is fully developed. The relative hardness RH of the obtained cylinder body and cylinder cover material of the diesel engine can reach 0.84, and the cutting property is excellent. After one year of application of the technology, the cost can be reduced by 300 yuan for each ton of casting.
Description
Technical field
The invention belongs to casting technology field, be specifically related to a kind of low cost, high efficiency, material property high-quality, stable
Diesel motor cylinder, cylinder head material and production technology thereof.
Background technology
The material of diesel engines at present gray iron is mainly HT300, and molten iron chemical composition content is as follows: C:(2.9-
3.3) %；Si:(1.4-1.7) %；Mn:(0.8-1.0) %；P<0.15%；S < 0.12%, uses copper, tin, chromium to carry out Alloying Treatment,
Between carbon equivalent ce 3.8-3.85, eutectic degree Sc is relatively low, and Production Practice of Casting Technologies is bad.Existing diesel motor cylinder, cylinder cap
The electro-smelting production technology melting ingredient of material molten iron mainly uses the pig iron, steel scrap, the big major metal material of foundry returns three, auxiliary
Material mainly has ferromanganese, ferrosilicon, low-sulfur carburant, and alloy element mainly uses copper, tin, chromium.
Casting pig is held in both hands, in Ф 30mm examination, the tensile strength recorded and is referred to as into the ratio of the tensile strength calculated by eutectic degree
Ripe degree RG.Electric induction furnace melting diesel engine cylinder block, maturity RG92.7% of cylinder head material at present.Casting pig is held in both hands in Ф 30mm examination
On the hardness recorded and the ratio going out normal consistency from calculation of Tensile Strength be referred to as relative hardness RH.Electric induction furnace melting diesel oil at present
The relative hardness RH of machine gray iron material is 0.94.
There is following defect in prior art:
1, diesel engine cylinder block, the eutectic degree Sc of cylinder head material and carbon equivalent ce are the highest, and Production Practice of Casting Technologies is bad.
2, diesel engine cylinder block, cylinder head material maturity RG relatively low, pregnant effect is bad, and production technology level is low, material
The potentiality of itself do not give full play to.
3, diesel engine cylinder block, cylinder head material relative hardness RH higher, strength of gray cast iron soft is high, and cutting ability is not
Good.
4, in three big major metal materials, the pig iron and steel scrap proportioning are higher, cause gray iron castings production cost high, raw
The heredity of iron and steel scrap inconsistency affect diesel engine cylinder block, cylinder head casting quality, and low-sulfur carburant becomes with the ton of alloying
This is higher, and casting cost is difficult to control to.
5, the ratio between each element is not regulated and controled by chemical composition, Partial Elements content high but to material capability
Not contribution；Alloying element in steel scrap is not efficiently used.
The most how overcoming the deficiencies in the prior art is the problem that current casting technology field needs solution badly.
Summary of the invention
The invention aims to solve the deficiencies in the prior art, it is provided that one is applicable to diesel motor cylinder, cylinder
The production technology of the material of lid, the molten iron CE using this technique to produce is high, and casting manufacturability is good, the advantage of low cost, and using should
Diesel motor cylinder that technique produces and cylinder head material has uniform in material, intensity is high, hardness is low and excellent cutting performance excellent
Point.
In order to reduce company's production cost, improve diesel engine cylinder block and cylinder head material mechanical performance, improve product competitiveness,
Make low-carbon (LC), environment-friendly and green casting technique, through research and development several times, test, adjust, sum up, have devised following diesel oil
Engine cylinder-body, cylinder head material and production technology thereof.
The technical solution used in the present invention is as follows:
The present invention is unless otherwise stated, representated by percentage sign be mass percent.
The production technology of a kind of material being applicable to diesel motor cylinder, cylinder cap, comprises the steps:
Step (1), equipment prepares: equipment uses medium-frequency induction furnace；
Step (2), dispensing: in parts by weight, steel scrap 37-40 part, foundry returns 20-24 part, iron filings cake 38-41 part, cast iron
Carburant 1.5-1.8 part；
Step (3), charging: first the 28-32% in described cast iron carburant is added in furnace bottom, sequentially add iron and cut cake, give up
Steel and foundry returns, remaining carburant should add with foundry returns and add before foundry returns residue 9-11%, it is desirable to have all the time
Carburant pushed down by foundry returns；
Step (4), fusing: foundry returns add after immediately power transmission fusing, during fusing use full power, uninterruptedly melt, electric furnace melt
Refining temperature to control more than 1530 DEG C, closes power and allow molten iron time of repose carry out after 5-15 minute again after reaching this temperature
Take off Slag treatment；
Step (5), adjusts molten iron chemical composition: after molten iron time of repose to 5-15 minute, sampling carries out chemical composition inspection immediately
Test, add ferrosilicon and/or ferromanganese according to assay；Carry out pregnant when molten iron chemical composition after adjustment reaches claimed below again
Educating, molten iron chemical composition requires: C 3.4-3.47%, Si 1.72-1.85%, Mn 0.65-0.75%, P≤0.08%, S 0.05-
0.1%, N 0.0065%-0.011%, surplus is Fe；
Breeding: carry out in inoculation casting ladle, molten iron goes out during casting ladle addition inovulant in electric furnace, and inovulant is with iron
Current pour in casting ladle together, and molten iron adds inovulant when measuring 79-87%, and inovulant uses FeSi75Al2.0-C or the silicon in strontium
Iron；When inovulant uses FeSi75Al2.0-C, addition is the 0.3%～0.5% of weight of molten iron, when inovulant uses ferrosilicon containing strontium
Addition is weight of molten iron 0.25%～0.4%；Breed the molten iron temperature in rear casting ladle: 1410-1440 DEG C；Step (7), cast:
Using casting machine to pour into a mould, carry out late inoculation with molten iron stream in casting process, post inoculant uses ferrosilicon containing strontium, adds
Amount is the 0.03% ~ 0.08% of pouring molten iron weight.
It is further preferred that described cast iron carburant is ZT-2 cast iron carburant.
It is further preferred that the 10 ton hour Medium frequency inductions that described medium-frequency induction furnace is Inductotherm Corp. of the U.S. melt
Change electric furnace.
It is further preferred that described casting machine is the full-automobile casting machine of PUMA15.
It is further preferred that the production technology of described diesel motor cylinder, cylinder head material, comprise the steps:
Step (1), equipment prepares: equipment uses the 10 ton hour Medium frequency induction smelting electrical furnaces of Inductotherm Corp. of the U.S.；
Step (2), dispensing: in parts by weight, steel scrap 38 parts, foundry returns 22 parts, iron filings cake 40 parts, ZT-2 cast iron carburant
1.5-1.8 part；
Step (3), charging: first 30% in described cast iron carburant is added in furnace bottom, sequentially adds iron and cut cake, steel scrap
And foundry returns, remaining carburant should add with foundry returns and add before foundry returns residue 10%, it is desirable to has all the time and melts down
Carburant pushed down by material；
Step (4), fusing: foundry returns add after immediately power transmission fusing, during fusing use full power, uninterruptedly melt, electric furnace melt
Refining temperature to control more than 1530 DEG C, closes power and allow molten iron time of repose take off after 8 minutes again after reaching this temperature
Slag treatment；
Step (5), adjusts molten iron chemical composition: after molten iron time of repose to 8 minute, sampling carries out chemical composition inspection, root immediately
Ferrosilicon and/or ferromanganese is added according to assay；Molten iron chemical composition after adjustment breeds when reaching claimed below again, molten iron
Chemical composition requires: C 3.4-3.47%, Si 1.72-1.85%, Mn 0.65-0.75%, P≤0.08%, S 0.05-0.1%, N
0.0065%-0.011%, surplus is Fe；
Step (6), breeds: inoculation is carried out in the casting ladle that capacity is 1.6 tons, and molten iron goes out the process to casting ladle in electric furnace
Middle addition inovulant, inovulant pours in casting ladle with molten iron stream, and molten iron measures 1.19-1.21 ton and adds inovulant, waters
Iron water amount in bag controls between 1.4 tons-1.5 tons, and inovulant uses FeSi75Al2.0-C or ferrosilicon containing strontium；Inovulant is adopted
With FeSi75Al2.0-C(GB/T2272-2009) time addition be the 0.3%～0.5% of weight of molten iron, inovulant use the silicon in strontium
During iron, addition is weight of molten iron 0.25%～0.4%；Breed the molten iron temperature in rear casting ladle: 1410-1440 DEG C；
Step (7), cast: use the full-automobile casting machine of PUMA15 to pour into a mould, carry out secondary with molten iron stream in casting process
Breeding, post inoculant uses ferrosilicon containing strontium, and addition is the 0.03% ~ 0.08% of pouring molten iron weight.
Feed way of the present invention improves the charging density of iron charge in stove, can effectively improve the melting efficiency of electric furnace.
Equipment maximum to be remained fusing power in fusion process of the present invention, forbids that power is stopped in midway, until in electric furnace
Molten iron temperature reach more than 1530 DEG C.It is then shut off furnace power and stands 5-15 minute.
Above diesel motor cylinder, the production technology of cylinder head material use the iron filings cake block of up to 40% to replace life completely
Iron, reduces production cost, and iron filings cake block is typically more cheap 30-40% than the pig iron, uses iron filings cake block to replace the pig iron to also eliminate the pig iron
Heredity, the Mn content in iron filings cake block is higher, by use uniformity good and containing Mn amount higher steel scrap can reduce manganese
The addition of iron or be not added with ferromanganese, reduces production cost further.
Use and study through pilot development several times, use ZT-2 cast iron carburant, coupon under equal conditions, can be improved
30 units of tensile strength, 10 units of hardness.
Controlling nitrogen content can make the quantity of pearlite, form and spacing that the contribution of tensile strength and hardness becomes maximum
And controlled, cancel copper, tin, chromium alloying technique, use diesel engine cylinder block, the eutectic degree of cylinder head material molten iron that this technique produces
Sc controls between 0.9-0.93, and carbon equivalent ce controls between 3.95-4.1, it is ensured that molten iron flow and casting manufacturability.
Diesel engine cylinder block of the present invention, maturity RG of cylinder head material molten iron can reach 113%, it is ensured that pregnant effect, material
The potentiality of matter itself are given full play to.Diesel engine cylinder block, the relative hardness RH of cylinder head material can reach 0.84, cutting ability
Excellent.This technique has passed through application more than a year, can make the cost that foundry goods per ton reduces by 300 yuan.
Compared with prior art, it has the beneficial effect that the present invention
1, the use of the pig iron cancelled by the iron filings cake using vast scale, reduces steel scrap consumption, greatly reduces production cost.
2, improve eutectic degree Sc and carbon equivalent ce, improve Production Practice of Casting Technologies.
3, maturity RG of molten iron can reach 113%, it is ensured that pregnant effect, and the potentiality of material itself have obtained fully
Play.
4, the relative hardness RH of molten iron can reach 0.84, and cutting ability is excellent.
5, use high-sulfur, high nitrogen carburant, coordinate and adjust manganese, sulfur content, in the casting technique condition that carbon equivalent ce is identical
Under can improve can material tensile strength and hardness, eliminate tin, only adopt copper, chromium carries out low alloying, with reducing production cost.
6, feed way improves furnace melting efficiency.
7, the invention provides the excellent diesel engine cylinder block of a kind of low cost, environmental protection, material capability and cylinder head material and
Production technology, the molten iron flow using this technique to produce is good, and casting manufacturability is good, reduces Technical Reform of Engine Castings per ton and is fused into
This, improve diesel engine cylinder block, the pregnant effect of cylinder cap molten iron, improve processing characteristics.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
It will be understood to those of skill in the art that the following example is merely to illustrate the present invention, and should not be regarded as limiting this
Bright scope.Unreceipted concrete technology or condition person in embodiment, according to the technology described by the document in this area or condition
Or carry out according to product description.Agents useful for same or instrument unreceipted production firm person, be and can be obtained by purchase
Conventional products.
Cast iron carburant is purchased from the people live in plenty in Shandong founding materials Co., Ltd, and concrete model is ZT-2 cast iron carburant.
Medium-frequency induction furnace is purchased from Inductotherm Corp. of the U.S., is 10 ton hour Medium frequency induction smelting electrical furnaces.
Casting machine is the full-automobile casting machine of PUMA15.
Embodiment 1
A kind of diesel motor cylinder, the production technology of cylinder head material, comprise the steps:
Step (1), equipment prepares: equipment uses medium-frequency induction furnace；
Step (2), dispensing: in parts by weight, steel scrap 37 parts, foundry returns 20 parts, iron filings cake 38 parts, ZT-2 cast iron carburant
1.5 part；
Step (3), charging: first 28% in described cast iron carburant is added in furnace bottom, sequentially adds iron and cut cake, steel scrap
And foundry returns, remaining carburant should add with foundry returns and add before foundry returns residue 9%, it is desirable to has all the time and melts down
Carburant pushed down by material；
Step (4), fusing: foundry returns add after immediately power transmission fusing, during fusing use full power, uninterruptedly melt, electric furnace melt
Refining temperature to control more than 1530 DEG C, closes power and allow molten iron time of repose take off after 5 minutes again after reaching this temperature
Slag treatment；
Step (5), adjusts molten iron chemical composition: after molten iron time of repose to 5 minute, sampling carries out chemical composition inspection, root immediately
Ferrosilicon and/or ferromanganese is added according to assay；Molten iron chemical composition after adjustment breeds when reaching claimed below again, molten iron
Chemical composition requires: C 3.4-3.47%, Si 1.72-1.85%, Mn 0.65-0.75%, P≤0.08%, S 0.05-0.1%, N
0.0065%-0.011%, surplus is Fe；
Step (6), breeds: carry out in inoculation casting ladle, and molten iron goes out during casting ladle addition inovulant in electric furnace, pregnant
Educating agent and pour in casting ladle with molten iron stream, molten iron adds inovulant when measuring 79%, and inovulant uses FeSi75Al2.0-C, adds
Entering amount is the 0.3% of weight of molten iron；Breed the molten iron temperature in rear casting ladle: 1410-1440 DEG C；
Step (7), cast: use casting machine to pour into a mould, carry out late inoculation, post inoculant with molten iron stream in casting process
Using ferrosilicon containing strontium, addition is the 0.03% of pouring molten iron weight.
Embodiment 2
A kind of diesel motor cylinder, the production technology of cylinder head material, comprise the steps:
Step (1), equipment prepares: equipment uses medium-frequency induction furnace；
Step (2), dispensing: in parts by weight, steel scrap 40 parts, foundry returns 24 parts, iron filings cake 41 parts, ZT-2 cast iron carburant
1.8 part；
Step (3), charging: first 32% in described cast iron carburant is added in furnace bottom, sequentially adds iron and cut cake, steel scrap
And foundry returns, remaining carburant should add with foundry returns and add before foundry returns residue 11%, it is desirable to has all the time and melts down
Carburant pushed down by material；
Step (4), fusing: foundry returns add after immediately power transmission fusing, during fusing use full power, uninterruptedly melt, electric furnace melt
Refining temperature to control more than 1530 DEG C, closes power and allow molten iron time of repose take off after 15 minutes again after reaching this temperature
Slag treatment；
Step (5), adjusts molten iron chemical composition: after molten iron time of repose to 15 minute, sampling carries out chemical composition inspection immediately,
Ferrosilicon and/or ferromanganese is added according to assay；Molten iron chemical composition after adjustment breeds when reaching claimed below again, iron
Hydrochemical Composition requires: C 3.4-3.47%, Si 1.72-1.85%, Mn 0.65-0.75%, P≤0.08%, S 0.05-0.1%, N
0.0065%-0.011%, surplus is Fe；
Step (6), breeds: carry out in inoculation casting ladle, and molten iron goes out during casting ladle addition inovulant in electric furnace, pregnant
Educating agent and pour in casting ladle with molten iron stream, molten iron adds inovulant when measuring 87%, and inovulant uses FeSi75Al2.0-C, adds
Entering amount is the 0.5% of weight of molten iron；Breed the molten iron temperature in rear casting ladle: 1410-1440 DEG C；
Step (7), cast: use casting machine to pour into a mould, carry out late inoculation, post inoculant with molten iron stream in casting process
Using ferrosilicon containing strontium, addition is the 0.08% of pouring molten iron weight.
Embodiment 3
A kind of diesel motor cylinder, the production technology of cylinder head material, comprise the steps:
Step (1), equipment prepares: equipment uses medium-frequency induction furnace；
Step (2), dispensing: in parts by weight, steel scrap 38 parts, foundry returns 21 parts, iron filings cake 40 parts, ZT-2 cast iron carburant
1.6 part；
Step (3), charging: first 31% in described cast iron carburant is added in furnace bottom, sequentially adds iron and cut cake, steel scrap
And foundry returns, remaining carburant should add with foundry returns and add before foundry returns residue 9.5%, it is desirable to have back all the time
Carburant pushed down by furnace charge；
Step (4), fusing: foundry returns add after immediately power transmission fusing, during fusing use full power, uninterruptedly melt, electric furnace melt
Refining temperature to control more than 1530 DEG C, closes power and allow molten iron time of repose take off after 10 minutes again after reaching this temperature
Slag treatment；
Step (5), adjusts molten iron chemical composition: after molten iron time of repose to 10 minute, sampling carries out chemical composition inspection immediately,
Ferrosilicon and/or ferromanganese is added according to assay；Molten iron chemical composition after adjustment breeds when reaching claimed below again, iron
Hydrochemical Composition requires: C 3.4-3.47%, Si 1.72-1.85%, Mn 0.65-0.75%, P≤0.08%, S 0.05-0.1%, N
0.0065%-0.011%, surplus is Fe；
Step (6), breeds: carry out in inoculation casting ladle, and molten iron goes out during casting ladle addition inovulant in electric furnace, pregnant
Educating agent and pour in casting ladle with molten iron stream, molten iron adds inovulant when measuring 82%, and inovulant uses FeSi75Al2.0-C, adds
Entering amount is the 0.4% of weight of molten iron, breeds the molten iron temperature in rear casting ladle: 1410-1440 DEG C；
Step (7), cast: use casting machine to pour into a mould, carry out late inoculation, post inoculant with molten iron stream in casting process
Using ferrosilicon containing strontium, addition is the 0.03% ~ 0.08% of pouring molten iron weight.
Embodiment 4
A kind of diesel motor cylinder, the production technology of cylinder head material, comprise the steps:
Step (1), equipment prepares: equipment uses medium-frequency induction furnace；
Step (2), dispensing: in parts by weight, steel scrap 39 parts, foundry returns 23 parts, iron filings cake 39.5 parts, cast iron carburant
1.7 part；
Step (3), charging: first 31% in described cast iron carburant is added in furnace bottom, sequentially adds iron and cut cake, steel scrap
And foundry returns, remaining carburant should add with foundry returns and add before foundry returns residue 10.5%, it is desirable to have back all the time
Carburant pushed down by furnace charge；
Step (4), fusing: foundry returns add after immediately power transmission fusing, during fusing use full power, uninterruptedly melt, electric furnace melt
Refining temperature to control more than 1530 DEG C, closes power and allow molten iron time of repose take off after 12 minutes again after reaching this temperature
Slag treatment；
Step (5), adjusts molten iron chemical composition: after molten iron time of repose to 12 minute, sampling carries out chemical composition inspection immediately,
Ferrosilicon and/or ferromanganese is added according to assay；Molten iron chemical composition after adjustment breeds when reaching claimed below again, iron
Hydrochemical Composition requires: C 3.4-3.47%, Si 1.72-1.85%, Mn 0.65-0.75%, P≤0.08%, S 0.05-0.1%, N
0.0065%-0.011%, surplus is Fe；
Step (6), breeds: carry out in inoculation casting ladle, and molten iron goes out during casting ladle addition inovulant in electric furnace, pregnant
Educating agent and pour in casting ladle with molten iron stream, molten iron adds inovulant when measuring 83%, inovulant uses ferrosilicon containing strontium, addition
It it is weight of molten iron 0.25%；Breed the molten iron temperature in rear casting ladle: 1410-1440 DEG C；
Step (7), cast: use casting machine to pour into a mould, carry out late inoculation, post inoculant with molten iron stream in casting process
Using ferrosilicon containing strontium, addition is the 0.03% ~ 0.08% of pouring molten iron weight.
Embodiment 5
Embodiment 5 is with the difference of embodiment 4: the addition of step (6) inovulant ferrosilicon containing strontium is weight of molten iron 0.4%.
Embodiment 6
Embodiment 5 is with the difference of embodiment 4: the addition of step (6) inovulant ferrosilicon containing strontium is weight of molten iron 0.3%.
Embodiment 7
A kind of diesel motor cylinder, the production technology of cylinder head material, comprise the steps:
Step (1), equipment prepares: equipment uses the 10 ton hour Medium frequency induction smelting electrical furnaces of Inductotherm Corp. of the U.S.；
Step (2), dispensing: in parts by weight, steel scrap 38 parts, foundry returns 22 parts, iron filings cake 40 parts, ZT-2 cast iron carburant
1.5 part；
Step (3), charging: first 30% in described cast iron carburant is added in furnace bottom, sequentially adds iron and cut cake, steel scrap
And foundry returns, remaining carburant should add with foundry returns and add before foundry returns residue 10%, it is desirable to has all the time and melts down
Carburant pushed down by material；
Step (4), fusing: foundry returns add after immediately power transmission fusing, during fusing use full power, uninterruptedly melt, electric furnace melt
Refining temperature to control more than 1530 DEG C, closes power and allow molten iron time of repose take off after 8 minutes again after reaching this temperature
Slag treatment；
Step (5), adjusts molten iron chemical composition: after molten iron time of repose to 8 minute, sampling carries out chemical composition inspection, root immediately
Ferrosilicon and/or ferromanganese is added according to assay；Molten iron chemical composition after adjustment breeds when reaching claimed below again, molten iron
Chemical composition requires: C 3.4-3.47%, Si 1.72-1.85%, Mn 0.65-0.75%, P≤0.08%, S 0.05-0.1%, N
0.0065%-0.011%, surplus is Fe；
Step (6), breeds: inoculation is carried out in the casting ladle that capacity is 1.6 tons, and molten iron goes out the process to casting ladle in electric furnace
Middle addition inovulant, inovulant pours in casting ladle with molten iron stream, and molten iron measures 1.19 tons and adds inovulant, in casting ladle
Iron water amount controls at 1.4 tons, and inovulant uses FeSi75Al2.0-C or ferrosilicon containing strontium；When inovulant uses FeSi75Al2.0-C
Addition is the 0.3% of weight of molten iron, and when inovulant uses ferrosilicon containing strontium, addition is weight of molten iron 0.25%；Breed in rear casting ladle
Molten iron temperature: 1410-1440 DEG C；
Step (7), cast: use the full-automobile casting machine of PUMA15 to pour into a mould, carry out secondary with molten iron stream in casting process
Breeding, post inoculant uses ferrosilicon containing strontium, and addition is the 0.03% of pouring molten iron weight.
Embodiment 8
A kind of diesel motor cylinder, the production technology of cylinder head material, comprise the steps:
Step (1), equipment prepares: equipment uses the 10 ton hour Medium frequency induction smelting electrical furnaces of Inductotherm Corp. of the U.S.；
Step (2), dispensing: in parts by weight, steel scrap 38 parts, foundry returns 22 parts, iron filings cake 40 parts, ZT-2 cast iron carburant
1.8 part；
Step (3), charging: first 30% in described cast iron carburant is added in furnace bottom, sequentially adds iron and cut cake, steel scrap
And foundry returns, remaining carburant should add with foundry returns and add before foundry returns residue 10%, it is desirable to has all the time and melts down
Carburant pushed down by material；
Step (4), fusing: foundry returns add after immediately power transmission fusing, during fusing use full power, uninterruptedly melt, electric furnace melt
Refining temperature to control more than 1530 DEG C, closes power and allow molten iron time of repose take off after 8 minutes again after reaching this temperature
Slag treatment；
Step (5), adjusts molten iron chemical composition: after molten iron time of repose to 8 minute, sampling carries out chemical composition inspection, root immediately
Ferrosilicon and/or ferromanganese is added according to assay；Molten iron chemical composition after adjustment breeds when reaching claimed below again, molten iron
Chemical composition requires: C 3.4-3.47%, Si 1.72-1.85%, Mn 0.65-0.75%, P≤0.08%, S 0.05-0.1%, N
0.0065%-0.011%, surplus is Fe；
Step (6), breeds: inoculation is carried out in the casting ladle that capacity is 1.6 tons, and molten iron goes out the process to casting ladle in electric furnace
Middle addition inovulant, inovulant pours in casting ladle with molten iron stream, and molten iron measures 1.21 tons and adds inovulant, in casting ladle
Iron water amount controls at 1.5 tons, and inovulant uses FeSi75Al2.0-C or ferrosilicon containing strontium；When inovulant uses FeSi75Al2.0-C
Addition is the 0.5% of weight of molten iron, and when inovulant uses ferrosilicon containing strontium, addition is weight of molten iron 0.4%；Breed in rear casting ladle
Molten iron temperature: 1410-1440 DEG C；
Step (7), cast: use the full-automobile casting machine of PUMA15 to pour into a mould, carry out secondary with molten iron stream in casting process
Breeding, post inoculant uses ferrosilicon containing strontium, and addition is the 0.08% of pouring molten iron weight.
Embodiment 9
A kind of diesel motor cylinder, the production technology of cylinder head material, comprise the steps:
Step (1), equipment prepares: equipment uses the 10 ton hour Medium frequency induction smelting electrical furnaces of Inductotherm Corp. of the U.S.；
Step (2), dispensing: in parts by weight, steel scrap 38 parts, foundry returns 22 parts, iron filings cake 40 parts, ZT-2 cast iron carburant
1.6 part；
Step (3), charging: first 30% in described cast iron carburant is added in furnace bottom, sequentially adds iron and cut cake, steel scrap
And foundry returns, remaining carburant should add with foundry returns and add before foundry returns residue 10%, it is desirable to has all the time and melts down
Carburant pushed down by material；
Step (4), fusing: foundry returns add after immediately power transmission fusing, during fusing use full power, uninterruptedly melt, electric furnace melt
Refining temperature to control more than 1530 DEG C, closes power and allow molten iron time of repose take off after 8 minutes again after reaching this temperature
Slag treatment；
Step (5), adjusts molten iron chemical composition: after molten iron time of repose to 8 minute, sampling carries out chemical composition inspection, root immediately
Ferrosilicon and/or ferromanganese is added according to assay；Molten iron chemical composition after adjustment breeds when reaching claimed below again, molten iron
Chemical composition requires: C 3.4-3.47%, Si 1.72-1.85%, Mn 0.65-0.75%, P≤0.08%, S 0.05-0.1%, N
0.0065%-0.011%, surplus is Fe；
Step (6), breeds: inoculation is carried out in the casting ladle that capacity is 1.6 tons, and molten iron goes out the process to casting ladle in electric furnace
Middle addition inovulant, inovulant pours in casting ladle with molten iron stream, and molten iron measures 1.2 tons and adds inovulant, in casting ladle
Iron water amount controls between 1.42 tons-1.45 tons, and inovulant uses FeSi75Al2.0-C or ferrosilicon containing strontium；Inovulant uses
During FeSi75Al2.0-C, addition is the 0.4% of weight of molten iron, and when inovulant uses ferrosilicon containing strontium, addition is weight of molten iron
0.32%；Breed the molten iron temperature in rear casting ladle: 1410-1440 DEG C；
Step (7), cast: use the full-automobile casting machine of PUMA15 to pour into a mould, carry out secondary with molten iron stream in casting process
Breeding, post inoculant uses ferrosilicon containing strontium, and addition is the 0.06% of pouring molten iron weight.
The general principle of the present invention, principal character and advantages of the present invention have more than been shown and described.The technology of the industry
Personnel, it should be appreciated that the present invention is not restricted to the described embodiments, simply illustrating this described in above-described embodiment and specification
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these become
Change and improvement both falls within scope of the claimed invention.Claimed scope by appending claims and
Equivalent defines.
Claims (7)
1. the production technology of the material being applicable to diesel motor cylinder, cylinder cap, it is characterised in that comprise the steps:
Step (1), equipment prepares: equipment uses medium-frequency induction furnace；
Step (2), dispensing: in parts by weight, steel scrap 37-40 part, foundry returns 20-24 part, iron filings cake 38-41 part, cast iron
Carburant 1.5-1.8 part；
Step (3), charging: first the 28-32% in described cast iron carburant is added in furnace bottom, sequentially add iron and cut cake, give up
Steel and foundry returns, remaining carburant should add with foundry returns and add before foundry returns residue 9-11%, it is desirable to have all the time
Carburant pushed down by foundry returns；
Step (4), fusing: foundry returns add after immediately power transmission fusing, during fusing use full power, uninterruptedly melt, electric furnace melt
Refining temperature to control more than 1530 DEG C, closes power and allow molten iron time of repose carry out after 5-15 minute again after reaching this temperature
Take off Slag treatment；
Step (5), adjusts molten iron chemical composition: after molten iron time of repose to 5-15 minute, sampling carries out chemical composition inspection immediately
Test, add ferrosilicon and/or ferromanganese according to assay；Carry out pregnant when molten iron chemical composition after adjustment reaches claimed below again
Educating, molten iron chemical composition requires: C 3.4-3.47%, Si 1.72-1.85%, Mn 0.65-0.75%, P≤0.08%, S 0.05-
0.1%, N 0.0065%-0.011%, surplus is Fe；
Step (6), breeds: carry out in inoculation casting ladle, and molten iron goes out during casting ladle addition inovulant in electric furnace, pregnant
Educating agent and pour in casting ladle with molten iron stream, molten iron adds inovulant when measuring 79-87%, and inovulant uses FeSi75Al2.0-C
Or ferrosilicon containing strontium；When inovulant uses FeSi75Al2.0-C, addition is the 0.3%～0.5% of weight of molten iron, and inovulant uses and contains
During strontium ferrosilicon, addition is weight of molten iron 0.25%～0.4%；Breed the molten iron temperature in rear casting ladle: 1410-1440 DEG C；
Step (7), cast: use casting machine to pour into a mould, carry out late inoculation, post inoculant with molten iron stream in casting process
Using ferrosilicon containing strontium, addition is the 0.03% ~ 0.08% of pouring molten iron weight.
It is applicable to the production technology of the material of diesel motor cylinder, cylinder cap the most according to claim 1, it is characterised in that
Described cast iron carburant is ZT-2 cast iron carburant.
It is applicable to the production technology of the material of diesel motor cylinder, cylinder cap the most according to claim 1, it is characterised in that
Described medium-frequency induction furnace is the 10 ton hour Medium frequency induction smelting electrical furnaces of Inductotherm Corp. of the U.S..
It is applicable to the production technology of the material of diesel motor cylinder, cylinder cap the most according to claim 1, it is characterised in that
Described casting machine is the full-automobile casting machine of PUMA15.
It is applicable to the production technology of the material of diesel motor cylinder, cylinder cap the most according to claim 1, it is characterised in that
Comprise the steps:
Step (1), equipment prepares: equipment uses the 10 ton hour Medium frequency induction smelting electrical furnaces of Inductotherm Corp. of the U.S.；
Step (2), dispensing: in parts by weight, steel scrap 38 parts, foundry returns 22 parts, iron filings cake 40 parts, ZT-2 cast iron carburant
1.5-1.8 part；
Step (3), charging: first 30% in described cast iron carburant is added in furnace bottom, sequentially adds iron and cut cake, steel scrap
And foundry returns, remaining carburant should add with foundry returns and add before foundry returns residue 10%, it is desirable to has all the time and melts down
Carburant pushed down by material；
Step (4), fusing: foundry returns add after immediately power transmission fusing, during fusing use full power, uninterruptedly melt, electric furnace melt
Refining temperature to control more than 1530 DEG C, closes power and allow molten iron time of repose take off after 8 minutes again after reaching this temperature
Slag treatment；
Step (5), adjusts molten iron chemical composition: after molten iron time of repose to 8 minute, sampling carries out chemical composition inspection, root immediately
Ferrosilicon and/or ferromanganese is added according to assay；Molten iron chemical composition after adjustment breeds when reaching claimed below again, molten iron
Chemical composition requires: C 3.4-3.47%, Si 1.72-1.85%, Mn 0.65-0.75%, P≤0.08%, S 0.05-0.1%, N
0.0065%-0.011%, surplus is Fe；
Step (6), breeds: inoculation is carried out in the casting ladle that capacity is 1.6 tons, and molten iron goes out the process to casting ladle in electric furnace
Middle addition inovulant, inovulant pours in casting ladle with molten iron stream, and molten iron measures 1.19-1.21 ton and adds inovulant, waters
Iron water amount in bag controls between 1.4 tons-1.5 tons, and when inovulant uses FeSi75Al2.0-C, addition is weight of molten iron
0.3%～0.5%, when inovulant uses ferrosilicon containing strontium, addition is weight of molten iron 0.25%～0.4%；Breed the molten iron in rear casting ladle
Temperature: 1410-1440 DEG C；
Step (7), cast: use the full-automobile casting machine of PUMA15 to pour into a mould, carry out secondary with molten iron stream in casting process
Breeding, post inoculant uses ferrosilicon containing strontium, and addition is the 0.03% ~ 0.08% of pouring molten iron weight.
6. the bavin that the production technology of the material being applicable to diesel motor cylinder, cylinder cap described in any one of claim 1-5 prepares
Oil turbine cylinder body.
7. the bavin that the production technology of the material being applicable to diesel motor cylinder, cylinder cap described in any one of claim 1-5 prepares
Oil turbine cylinder cap.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106563796A (en) * | 2016-10-26 | 2017-04-19 | 宁夏共享模具有限公司 | Iron casting process control system |
| CN108952990A (en) * | 2018-06-27 | 2018-12-07 | 山西中条山机电设备有限公司 | A kind of high-strength alloy cast-iron head and its production technology |
| CN110253005A (en) * | 2019-06-06 | 2019-09-20 | 郑石竹 | A kind of preparation method and system of the optimization casting shrinkage cavity of control iron liquid eutectic degree |
| CN110747389A (en) * | 2019-11-29 | 2020-02-04 | 泛凯斯特汽车零部件(江苏)有限公司 | Casting made of gray cast iron and manufacturing method thereof |
| CN111334634A (en) * | 2020-03-18 | 2020-06-26 | 苏州勤堡精密机械有限公司 | Gray cast iron casting process with high tensile strength and accurate feeding |
| CN111451444A (en) * | 2020-05-21 | 2020-07-28 | 宜宾普什联动科技有限公司 | Casting method of high-horsepower engine box body casting |
| CN111482556A (en) * | 2020-05-21 | 2020-08-04 | 宜宾普什联动科技有限公司 | Casting method of engine cylinder block casting |
| CN112226680A (en) * | 2020-09-16 | 2021-01-15 | 扬州晶玖汽车配件有限公司 | Engine cylinder block casting material and preparation method thereof |
| CN113667884A (en) * | 2021-08-14 | 2021-11-19 | 昆明云内动力股份有限公司 | Gray cast iron casting smelting material and casting method thereof |
| CN114574752A (en) * | 2022-02-25 | 2022-06-03 | 宁国东方碾磨材料股份有限公司 | Free-cutting gray cast iron alloy for cylinder block and preparation method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106563796A (en) * | 2016-10-26 | 2017-04-19 | 宁夏共享模具有限公司 | Iron casting process control system |
| CN108952990A (en) * | 2018-06-27 | 2018-12-07 | 山西中条山机电设备有限公司 | A kind of high-strength alloy cast-iron head and its production technology |
| CN110253005A (en) * | 2019-06-06 | 2019-09-20 | 郑石竹 | A kind of preparation method and system of the optimization casting shrinkage cavity of control iron liquid eutectic degree |
| CN110253005B (en) * | 2019-06-06 | 2021-07-30 | 漳州海力机械制造有限公司 | Preparation method and system for controlling molten iron eutectic degree to optimize casting shrinkage cavity |
| CN110747389A (en) * | 2019-11-29 | 2020-02-04 | 泛凯斯特汽车零部件(江苏)有限公司 | Casting made of gray cast iron and manufacturing method thereof |
| CN111334634A (en) * | 2020-03-18 | 2020-06-26 | 苏州勤堡精密机械有限公司 | Gray cast iron casting process with high tensile strength and accurate feeding |
| CN111451444A (en) * | 2020-05-21 | 2020-07-28 | 宜宾普什联动科技有限公司 | Casting method of high-horsepower engine box body casting |
| CN111482556A (en) * | 2020-05-21 | 2020-08-04 | 宜宾普什联动科技有限公司 | Casting method of engine cylinder block casting |
| CN112226680A (en) * | 2020-09-16 | 2021-01-15 | 扬州晶玖汽车配件有限公司 | Engine cylinder block casting material and preparation method thereof |
| CN113667884A (en) * | 2021-08-14 | 2021-11-19 | 昆明云内动力股份有限公司 | Gray cast iron casting smelting material and casting method thereof |
| CN114574752A (en) * | 2022-02-25 | 2022-06-03 | 宁国东方碾磨材料股份有限公司 | Free-cutting gray cast iron alloy for cylinder block and preparation method thereof |
| CN114574752B (en) * | 2022-02-25 | 2023-02-28 | 宁国东方碾磨材料股份有限公司 | Free-cutting gray cast iron alloy for cylinder block and preparation method thereof |
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