CN106282787A - A kind of cast steel material and the manufacture method of foundry goods thereof - Google Patents
A kind of cast steel material and the manufacture method of foundry goods thereof Download PDFInfo
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- CN106282787A CN106282787A CN201610646137.3A CN201610646137A CN106282787A CN 106282787 A CN106282787 A CN 106282787A CN 201610646137 A CN201610646137 A CN 201610646137A CN 106282787 A CN106282787 A CN 106282787A
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- 239000000463 material Substances 0.000 title claims abstract description 69
- 229910001208 Crucible steel Inorganic materials 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims description 30
- 239000000203 mixture Substances 0.000 claims abstract description 49
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 32
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 29
- 238000005266 casting Methods 0.000 claims abstract description 26
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 25
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 16
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 13
- 238000004458 analytical method Methods 0.000 claims abstract description 11
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 10
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 10
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 145
- 239000010959 steel Substances 0.000 claims description 145
- 239000004576 sand Substances 0.000 claims description 40
- 239000000126 substance Substances 0.000 claims description 37
- 238000010438 heat treatment Methods 0.000 claims description 35
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 34
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 34
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 29
- 229910052799 carbon Inorganic materials 0.000 claims description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 21
- 238000004364 calculation method Methods 0.000 claims description 21
- 239000011572 manganese Substances 0.000 claims description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 238000010792 warming Methods 0.000 claims description 16
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 15
- 229910000805 Pig iron Inorganic materials 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 239000010703 silicon Substances 0.000 claims description 13
- -1 silicon barium Aluminum Chemical compound 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 8
- 238000010183 spectrum analysis Methods 0.000 claims description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000010079 rubber tapping Methods 0.000 claims description 6
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- OOJQNBIDYDPHHE-UHFFFAOYSA-N barium silicon Chemical compound [Si].[Ba] OOJQNBIDYDPHHE-UHFFFAOYSA-N 0.000 claims description 4
- 238000004886 process control Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 239000000725 suspension Substances 0.000 abstract description 9
- 239000011651 chromium Substances 0.000 description 8
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- 239000000470 constituent Substances 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 5
- 229910052737 gold Inorganic materials 0.000 description 5
- 239000010931 gold Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 229910017083 AlN Inorganic materials 0.000 description 2
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007499 fusion processing Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- COHCXWLRUISKOO-UHFFFAOYSA-N [AlH3].[Ba] Chemical compound [AlH3].[Ba] COHCXWLRUISKOO-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention provides the cast steel material of a kind of high intensity, excellent toughness, low cost, its composition consists of by weight percentage: C:0.32 0.40%, Si:0.25 0.45%, Mn:0.50 0.80%, P :≤0.035%, S :≤0.035%, N:0.02 0.03%, Al:0.020 0.060%, Mo :≤0.10%, V :≤0.05%, Ni :≤0.20%, Cu :≤0.20%, Cr :≤0.25%, and remaining is Fe and inevitable impurity.Cast steel material of the present invention is not in the case of increasing the wall thickness of engineering truck axle housing and suspension, cross section ratio and not increasing manufacturing cost, and lift bridge housing and the intensity of strut mount and toughness, to improve bearing capacity；Be combined with finite element analysis can the casting thickness of suitable thinning product, play light-weighted purpose, reduce manufacturing cost simultaneously.
Description
Technical field
The present invention relates to vehicle axle housing and equalizing type of suspension field, especially relate to is medium and heavy truck and loader
Deng engineering truck axle housing and the cast steel material of suspension and the manufacture method of foundry goods thereof.
Background technology
Make a general survey of domestic project vehicle cast-steel axle shell parts, its material used be generally QT500-7, ZG310-570,
SCW550 etc. in ZG270-500, ZG25Mn, ZG40Cr, Japan's JIS G5102 (1991) standard.The machinery of each material trademark
Performance, is shown in Fig. 1.The chemical composition of each material trademark, is shown in Fig. 2.Maximum from Fig. 1 and Fig. 2, QT500-7 material fragility, and carbon
Equivalent is the highest, it is impossible to welding；Though ZG40Cr mechanical performance is the highest, but chromium element need to be added, and heat treatment normalizing 830-860 DEG C+
Being tempered 520-680 DEG C, material and heat treatment cost are high；During ZG25Mn and SCW550 casting smelting molten steel, need mild steel, and need
Adding more manganese element, heat treatment temperature is high, and material and heat treatment cost are high, but mechanical performance is general；ZG270-500 and
Though ZG310-570 material cost and heat treatment cost are relatively low, but mechanical performance does not has advantage, more typically.Along with country " energy-conservation,
Reduce discharging " total strategy requirement, each automobile factory all makes great efforts research and implementing, and axle housing conduct in terms of parts lightweight
Important spare part, is important lightweight object, and to ensure lightweight loss of weight to be carried out on the premise of performance, the most effectively
Means be improve material performance.And auto parts and components manufacturer is in order to guarantee the profit and survive, improving material property
Under premise, manufacturing cost can not be greatly improved again, in the urgent need to a kind of high intensity, excellent toughness, the cast steel material of low cost and
Manufacturing process.
Summary of the invention
It is an object of the invention to overcome above-mentioned deficiency, it is provided that high intensity, excellent toughness, a kind of cast steel material of low cost
And the manufacture method of foundry goods.
For achieving the above object, the technical solution of the present invention is: cast steel material, and its chemical composition is by weight percentage
Consist of:
C:0.32-0.40%, Si:0.25-0.45%, Mn:0.50-0.80%, P :≤0.035%, S :≤0.035%, N:0.02-
0.03%, Al:0.020-0.060%, Mo :≤0.10%, V :≤0.05%, Ni :≤0.20%, Cu :≤0.20%, Cr :≤0.25%,
Remaining is Fe and inevitable impurity.
Preferably, its raw material includes the following components calculated by weight:
No. 35 steel: 55-63 part, ZG270-500 steel: 30-35 part, the pig iron: 0.41-0.48 part, ferrosilicon: 0.06-0.34 part, silicon barium
Aluminum: 0.08-0.1 part, aluminum steel 0.049-0.06 part, nitrided ferromanganese: 0.5-0.77 part, low-carbon ferromanganese: 0-0.25 part.
Preferably, iron content weight/mass percentage composition >=97% of ZG270-500 steel and No. 35 steel, the pig iron is GB/T 718-2005
Z18 in standard, ferrosilicon is the FeSi75Al0.5-B in GB/T 2272-2009 standard, and silicon barium aluminium alloy is YB/T 066-
FeAl30Ba6Si20 in 2008 standards, low-carbon ferromanganese is the FeMn84C0.7 in GB/T 3795-2006 standard；Nitrided ferromanganese
Main chemical compositions be: Mn:72%-75%, N:3.5-4%, C :≤0.50%, Si :≤3.50%, P :≤0.30%, S :≤
0.02%, remaining is Fe.No. 35 steel can be steel scrap, and the present invention is with No. 35 steel, ZG270-500 foundry returns for the main material of raw material, the pig iron
Main carburetting, ferrosilicon mainly increases silicon, and silicon barium aluminum mainly increases aluminum and silicon and deoxidation, the main deoxidation of aluminum steel, the main nitrogen pick-up of nitrided ferromanganese
And manganese, low-carbon ferromanganese is mainly as in fusion process, the chemical composition nitrogen content of molten steel reaches desired value, and manganese is too much because of scaling loss,
When need to increase Fe content, low-carbon ferromanganese is used to increase molten steel Fe content.
The manufacture method of the foundry goods of a kind of above-mentioned cast steel material, comprises the steps:
A. toward putting into ZG270-500 steel 30-35 part by weight in intermediate frequency furnace and No. 35 steel 55-63 parts are smelted into molten steel, addition removes
Slag agent deslagging；
B. toward intermediate frequency furnace puts into pig iron 0.41-0.48 part and ferrosilicon 0.06-0.34 part, to be melted after, add deslagging agent deslagging；
C. put into nitrided ferromanganese 0.5-0.77 part and low-carbon ferromanganese 0-0.25 part toward intermediate frequency furnace, carry out nitrogen pick-up and increase manganese；
D. put into silicon barium aluminum 0.08-0.1 part toward intermediate frequency furnace, carry out increasing aluminum, increasing silicon and deoxidation, the molten steel in intermediate frequency furnace is heated to
After 1640-1650 DEG C, stop intermediate frequency heating；
E. put into aluminum steel 0.049-0.06 part toward steel ladle, the molten steel in intermediate frequency furnace is poured steel ladle and taps, toward molten steel
Bag puts into deslagging agent deslagging；
F. casting sand mold by steel ladle, cast temperature 1550-1580 DEG C, the time cast from tapping to controls at 10 minutes
Within, rear gained foundry goods of having cast is cast steel material foundry goods.
Preferably, the sand mold of step e is V method moulding, also comprises the steps:
G., after step f has been cast 10-15 minute, sand mold stops taking out negative pressure；After having cast 30-50 minute, sand mold is unpacked
Knockout, removal core and dead head obtain foundry goods；(through substantial amounts of knowhow, after foundry goods molten steel waters completely, stand in sand mold
After solidification cooling 10-15 minute, casting strength is it has been established that can stop taking out negative pressure.Will not set up because of casting strength, and stop
Only take out negative pressure, cause the foundry goods in sand mold rise type fleshiness, deform, collapse sand)；
H. to foundry goods ball blast 12-15 minute；Remove the oxide skin of cast(ing) surface, sand grains, coating shell；
I. loading in car type furnace by foundry goods, car type furnace is warming up to 860-880 DEG C, is incubated 140-160 minute, stops heating, half-open
Fire door is cooled to 400-500 DEG C, turns off fire door, is warming up to 640-660 DEG C, is incubated 170-190 minute, and then car type furnace stops
Heating, comes out of the stove foundry goods, and air cooling is to room temperature；(present invention is the most different with the Technology for Heating Processing of SCW550 and ZG40Cr, first
Secondly holding temperature is different, and normalizing is that foundry goods is directly come out of the stove air cooling after temperature retention time terminates, and the normalizing of the present invention is to protect
The temperature time terminates the first slow cooling in the stove of half-open fire door of rear foundry goods, controls the speed cooled, after being down to 500 DEG C, turns off
Fire door carries out temper, makes foundry goods after ensureing the premise that normalizing metallographic structure is qualified, can guarantee that again the case hardness of foundry goods,
Foundry goods has good machining property；Owing to normalizing and tempering are carried out continuously, it is not result in that heat-treatment furnace normalizing is complete
Cheng Hou, in-furnace temperature is reduced close to room temperature, shortens the time of tempering, reduces the cost of heat treatment.)
J. to foundry goods ball blast 15-20 minute, casting finished products is formed.
Owing to, in fusion process, using the mode adding silicon barium aluminium alloy and nitrided ferromanganese to add Al and N, to form nitrogen
Change aluminum phase, play crystal grain thinning, improve intensity and the effect of toughness.
Preferably, the ZG270-500 steel in step a is steel cuttings, and in step a, ZG270-500 steel and No. 35 steel put into intermediate frequency
The method of stove is: first put into ZG270-500 steel cuttings 15-17.5 part toward intermediate frequency furnace, to be melted after, then put into ZG270-500 steel cuttings
15-17.5 part and No. 35 steel 55-63 parts.First put into the ZG270-500 steel cuttings of half, be to quickly melt molten steel, adding
The melting of No. 35 steel steel scraps of bulk of fast follow-up interpolation.
Preferably, further comprise the steps of: b1. between step b and step c and the liquid steel sampling in intermediate frequency furnace is carried out first timeization
Studying spectral analysis, according to the chemical composition of analysis result contrast cast steel material, the material addition calculating not enough composition is raw
Become for the first time " burdening calculation result advice note "；Step c and d can add according to the material of " burdening calculation result advice note " for the first time
Dosage requires to add nitrided ferromanganese, carbon ferromanganese, silicon barium aluminum.Though each furnace charge adds melting by weight, but in actual production process
In, because accidental factor causes smelting time to extend, alloying element scaling loss amount can be caused to increase, in order to confirm the chemical composition of molten steel
Whether in controlling claimed range, need each constituent content of sample examination molten steel, as certain constituent content is not controlling claimed range
In, then laboratorian can calculate the required weight increasing certain alloy by dispensing formula, fills on " burdening calculation result advice note ",
Then blast-furnace man carries out, by the alloy species on " burdening calculation result advice note " and weight, interpolation of weighing.
Preferably, further comprise the steps of: c1. between step c and step d and the liquid steel sampling in intermediate frequency furnace is carried out second timeization
Studying spectral analysis, the material addition calculating not enough composition according to the chemical composition of analysis result contrast cast steel material generates
For the second time " burdening calculation result advice note ", step d can be according to the material addition of second time " burdening calculation result advice note "
Require silicon barium aluminum；The whole process control of step c1 completed in 5 minutes.Control in 5 minutes, mainly prevent chemical examination time mistake
Long, in causing stove, each melting loss of elements amount is big, causes ladle chemistry content defective.
The manufacture method of the foundry goods of a kind of above-mentioned cast steel material, comprises the steps:
(1) having the molten steel of above-mentioned cast steel material composition by intermediate frequency furnace preparation, cast sand mold by steel ladle, sand mold is that V method is made
Type, cast temperature 1550-1580 DEG C；
(2) having cast 10-15 minute, sand mold stops taking out negative pressure；After having cast 30-50 minute, knockout that sand mold is unpacked, go
Desanding core and dead head obtain foundry goods,
(3) to foundry goods ball blast 12-15 minute；Remove the oxide skin of cast(ing) surface, sand grains, coating shell；
(4) loading in car type furnace by foundry goods, car type furnace is warming up to 860-880 DEG C, is incubated 140-160 minute, stops heating, half-open
Fire door is cooled to 400-500 DEG C, turns off fire door, is warming up to 640-660 DEG C, is incubated 170-190 minute, then stops heating,
Being come out of the stove by foundry goods, air cooling is to room temperature；
(5) to foundry goods ball blast 15-20 minute, casting finished products is formed.
Preferably, load in car type furnace after step (4) medium casting folds 5 layers the most successively according to bonnet.Foundry goods fold high 5 layers with
On, it is easily caused lower 3 layers of foundry goods and deforms in heat treatment process and the dangerous increase of collapse of setting, folded high less than 5 layers, cause one
The minimizing of the foundry goods quantity of furnace treatment reason, heat treatment relative cost increases.
By using above-mentioned technical scheme, the invention has the beneficial effects as follows:
1) cast steel material of the present invention is in the case of the wall thickness not increasing engineering truck axle housing and suspension and cross section ratio, promotes
Axle housing body and the intensity of strut mount and toughness, because containing aluminium nitride in cast steel material, aluminum has crystal grain thinning or stops crystal grain
The effect grown up, aluminum separates out the effect that with crystal grain thinning, can prevent temper brittleness with the form of aluminium nitride in austenitic area, thus
Improve the loading capacity of engineering truck, extend the service life of axle housing body.
2) in the case of equal bearing capacity, the cast steel material of the present invention can the casting thickness of suitable thinning product, rise
To light-weighted purpose, its casting intermittent fever is reduced few, and the critical thickness of cast steel is 35mm, and when casting more than 35mm, shrinkage cavity shrinkage porosity is sent out
Raw ratio is greatly increased, and the shrinkage cavity shrinkage porosity phenomenon of casting can be greatly reduced.
3) cast steel material and the process for manufacturing cast article of the present invention are simple.The raw material of molten steel can be steel scrap, steel cuttings etc.
Obtaining convenient, low cost, heat treatment is simpler than quenched other heat treatment such as grade, low cost.It is easy to steel-smelting water management chemical analysis,
Specific Technology for Heating Processing enables the axle housing of the present invention to have stable metallographic structure, and product does not haves pore, crackle etc.
Defect, thus the inherent quality of stable prod, it is ensured that the service life of axle housing.
4) specific Technology for Heating Processing makes axle housing case hardness at 160-210HB, without increasing cost during machining, uses
Special alloy-steel cutter, it is simple to processing.
Accompanying drawing explanation
Fig. 1 is the mechanical performance of each vehicle cast steel material trade mark；
Fig. 2 is the chemical composition of each vehicle cast steel material trade mark；
Fig. 3 is process of thermal treatment curve chart of the present invention；
Fig. 4 is the stress-strain diagram of the embodiment of the present invention 1；
Fig. 5 is the stress-strain diagram of the embodiment of the present invention 2.
Detailed description of the invention
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Embodiment 1:
Cast steel material, its chemical composition consists of by weight percentage:
C:0.32-0.40%, Si:0.25-0.45%, Mn:0.50-0.80%, P :≤0.035%, S :≤0.035%, N:0.02-
0.03%, Al:0.020-0.060%, Mo :≤0.10%, V :≤0.05%, Ni :≤0.20%, Cu :≤0.20%, Cr :≤0.25%,
Remaining is Fe and inevitable impurity.
The manufacture method of the bridge shell casting of above-mentioned cast steel material, comprises the steps:
A. toward in intermediate frequency furnace by weight putting into the ZG270-500 steel of 15 parts, after being smelted into molten steel, continue to put into 15 parts
ZG270-500 steel and No. 35 steel of 60 parts, be smelted into molten steel, adds deslagging agent deslagging；Wherein ZG270-500 steel be steel cuttings and/
Or foundry returns, No. 35 steel are No. 35 steel scraps, iron content weight/mass percentage composition >=97% of ZG270-500 steel and No. 35 steel；
B. toward intermediate frequency furnace puts into the pig iron of 0.41 part and 0.06 part of ferrosilicon, carry out carburetting and increase silicon, to be melted after, add slagging-off
Agent deslagging；The pig iron is the Z18 in GB/T 718-2005 standard, and ferrosilicon is in GB/T 2272-2009 standard
FeSi75Al0.5-B；
B1. the liquid steel sampling in intermediate frequency furnace is carried out chemical composition spectrum analysis for the first time, contrasts cast steel material according to analysis result
The chemical composition ranges of material, the material addition calculating not enough composition generates for the first time " burdening calculation result advice note "；Though it is each
Furnace charge adds melting by weight, but in actual production process, because accidental factor causes smelting time to extend, can cause alloy
Melting loss of elements amount increases, in order to confirm that the chemical composition of molten steel, whether in controlling claimed range, needs each of sample examination molten steel
Constituent content, such as certain constituent content not in controlling claimed range, then laboratorian can calculate certain conjunction of required increase by dispensing formula
The weight of gold, fills on " burdening calculation result advice note ", and then blast-furnace man is by the conjunction on " burdening calculation result advice note "
Gold kind and weight carry out interpolation of weighing；
C. put into the nitrided ferromanganese of 0.55 part according to the requirement of for the first time " burdening calculation result advice note " toward intermediate frequency furnace, increase
Nitrogen and increasing manganese；Nitrided ferromanganese chemical composition is Mn:74%, N:3.2%, C:0.43%, Si:2.3%, P:0.21%, S:0.02%, remaining
For Fe.
C1. the liquid steel sampling in intermediate frequency furnace is carried out second time chemical composition spectrum analysis, determines that analysis result meets
State the chemical composition of cast steel material；Whole process control completed in 5 minutes；
D. put into the silicon barium aluminum of 0.08 part at first 1 minute input intermediate frequency furnace of tapping, carry out increasing aluminum, increasing silicon and deoxidation；Silicon barium aluminum closes
Gold is the FeAl30Ba6Si20 in YB/T 066-2008 standard, after the molten steel in intermediate frequency furnace is heated to 1640 DEG C, in stopping
Frequently stove heating；
E. putting into aluminum steel 0.049 part toward steel ladle, the molten steel in intermediate frequency furnace is poured steel ladle and taps, aluminum steel can be to steel
Water carries out final deoxidizing, puts into deslagging agent deslagging toward steel ladle；
F. casting sand mold by steel ladle, sand mold is V method moulding, cast temperature 1550 DEG C, the time cast from tapping to 9 points
Clock, rear gained foundry goods of having cast is cast steel material foundry goods；
The chemical composition of foundry goods is after testing: C:0.35%, Si:0.25%, Mn:0.60%, P:0.024%, S:0.016%, N:
0.02%, Al:0.046%, Mo:0.03%, V:0.004%, Ni:0.01%, Cu:0.03%, Cr:0.15%, remaining is for Fe and can not keep away
The impurity exempted from；
G., after step f has been cast 10 minutes, sand mold stops taking out negative pressure；After having cast 30 minutes, knockout that sand mold is unpacked, go
Desanding core and dead head obtain foundry goods,
H. to foundry goods ball blast 12 minutes；Remove the oxide skin of cast(ing) surface, sand grains, coating shell；
I. loading in car type furnace after foundry goods folds 5 layers the most successively according to bonnet, car type furnace is warming up to 860 DEG C, is incubated 140 minutes,
Stopping heating, half-open fire door is cooled to 400 DEG C, turns off fire door, is warming up to 640 DEG C, is incubated 170 minutes, and then car type furnace stops
Only heating, comes out of the stove foundry goods, and air cooling is to room temperature；
J. to foundry goods ball blast 15 minutes, axle housing body casting finished products is formed.
Such as Fig. 4, after testing, the mechanical performance of axle housing body is tensile strength 817Mpa, yield strength 415Mpa, elongation of having no progeny
Rate 14.6%, the contraction percentage of area 22%；Mechanical performance is considerably beyond common axle housing.
Embodiment 2:
The cast steel material of equalizing type of suspension, its chemical composition consists of by weight percentage:
C:0.32-0.40%, Si:0.25-0.45%, Mn:0.50-0.80%, P :≤0.035%, S :≤0.035%, N:0.02-
0.03%, Al:0.020-0.060%, Mo :≤0.10%, V :≤0.05%, Ni :≤0.20%, Cu :≤0.20%, Cr :≤0.25%,
Remaining is Fe and inevitable impurity.
The manufacture method of the equalizing type of suspension foundry goods of above-mentioned cast steel material, comprises the steps:
A. toward in intermediate frequency furnace by weight putting into the ZG270-500 steel of 17.5 parts, after being smelted into molten steel, continue to put into 17.5 parts
ZG270-500 steel and No. 35 steel of 55 parts, be smelted into molten steel, adds deslagging agent deslagging；Wherein ZG270-500 steel is steel cuttings, 35
Number steel is No. 35 steel scraps, the iron content weight/mass percentage composition 97.5% of ZG270-500 steel and No. 35 steel；
B. toward intermediate frequency furnace puts into the pig iron of 0.45 part and 0.25 part of ferrosilicon, carry out carburetting and increase silicon, to be melted after, add slagging-off
Agent deslagging；The pig iron is the Z18 in GB/T 718-2005 standard, and ferrosilicon is in GB/T 2272-2009 standard
FeSi75Al0.5-B；
B1. the liquid steel sampling in intermediate frequency furnace is carried out chemical composition spectrum analysis for the first time, contrasts cast steel material according to analysis result
The chemical composition ranges of material, the material addition calculating not enough composition generates for the first time " burdening calculation result advice note "；Though it is each
Furnace charge adds melting by weight, but in actual production process, because accidental factor causes smelting time to extend, can cause alloy
Melting loss of elements amount increases, in order to confirm that the chemical composition of molten steel, whether in controlling claimed range, needs each of sample examination molten steel
Constituent content, such as certain constituent content not in controlling claimed range, then laboratorian can calculate certain conjunction of required increase by dispensing formula
The weight of gold, fills on " burdening calculation result advice note ", and then blast-furnace man is by the conjunction on " burdening calculation result advice note "
Gold kind and weight carry out interpolation of weighing；
C. the nitrided ferromanganese of 0.5 part and 0.25 part are put into according to the requirement of for the first time " burdening calculation result advice note " toward intermediate frequency furnace
Low-carbon ferromanganese, carry out nitrogen pick-up and increase manganese；Nitrided ferromanganese chemical composition is Mn:72%, N:4%, C:0.20%, Si:3.1%, P:
0.30%, S:0.01%, remaining is Fe；Low-carbon ferromanganese is the FeMn84C0.7 in GB/T 3795-2006 standard；
C1. the liquid steel sampling in intermediate frequency furnace is carried out second time chemical composition spectrum analysis, determines that analysis result meets above-mentioned casting
The chemical composition of Steel material；Whole process control completed in 5 minutes；Chemical composition according to analysis result contrast cast steel material
The material addition calculating not enough composition generates second time " burdening calculation result advice note "；
D. put into the silicon barium aluminum of 0.08 part according to the requirement of second time " burdening calculation result advice note " toward intermediate frequency furnace, increase
Aluminum, increasing silicon and deoxidation；Silicon barium aluminium alloy is the FeAl30Ba6Si20 in YB/T 066-2008 standard, by the molten steel in intermediate frequency furnace
After being heated to 1650 DEG C, stop intermediate frequency heating；
E. putting into aluminum steel 0.050 part toward steel ladle, the molten steel in intermediate frequency furnace is poured steel ladle and taps, aluminum steel can be to steel
Water carries out final deoxidizing, puts into deslagging agent deslagging toward steel ladle；
F. casting sand mold by steel ladle, sand mold is V method moulding, cast temperature 1580 DEG C, and the time cast from tapping to is
10 minutes, rear gained foundry goods of having cast was cast steel material foundry goods；
The chemical composition of foundry goods is after testing: C:0.37%, Si:0.30%, Mn:0.70, P:0.021%, S:0.020%, N:
0.023%, Al:0.043%, Mo:0.04%, V:0.006%, Ni:0.01%, Cu:0.043%, Cr:0.16%, remaining is Fe and can not
The impurity avoided；
G., after step f has been cast 15 minutes, sand mold stops taking out negative pressure；After having cast 45 minutes, knockout that sand mold is unpacked, go
Desanding core and dead head obtain foundry goods；
H. to foundry goods ball blast 15 minutes；Remove the oxide skin of cast(ing) surface, sand grains, coating shell；
I. loading in car type furnace after foundry goods folds 5 layers the most successively according to bonnet, car type furnace is warming up to 880 DEG C, is incubated 160 minutes,
Stopping heating, half-open fire door is cooled to 500 DEG C, turns off fire door, is warming up to 660 DEG C, is incubated 190 minutes, and then car type furnace stops
Only heating, comes out of the stove foundry goods, and air cooling is to room temperature；
J. to foundry goods ball blast 20 minutes, axle housing body casting finished products is formed.
Such as Fig. 5, after testing, the mechanical performance of equalizing type of suspension is tensile strength 827Mpa, and yield strength 403Mpa is had no progeny and stretched
Long rate 14%, the contraction percentage of area 21%, mechanical performance is considerably beyond common equalizing type of suspension.
Embodiment 3:
Cast steel material, its chemical composition consists of by weight percentage:
C:0.32-0.40%, Si:0.25-0.45%, Mn:0.50-0.80%, P :≤0.035%, S :≤0.035%, N:0.02-
0.03%, Al:0.020-0.060%, Mo :≤0.10%, V :≤0.05%, Ni :≤0.20%, Cu :≤0.20%, Cr :≤0.25%,
Remaining is Fe and inevitable impurity.
The manufacture method of the bridge shell casting of above-mentioned cast steel material, comprises the steps:
A. toward in intermediate frequency furnace by weight putting into the ZG270-500 steel of 32 parts and No. 35 steel of 63 parts, be smelted into molten steel, addition removes
Slag agent deslagging；Wherein ZG270-500 steel is steel cuttings, No. 35 steel be No. 35 steel scraps, ZG270-500 steel and No. 35 steel containing weight of iron
Percentage composition 98%；
B. toward intermediate frequency furnace puts into the pig iron of 0.43 part and 0.12 part of ferrosilicon, carry out carburetting and increase silicon, to be melted after, add slagging-off
Agent deslagging；The pig iron is the Z18 in GB/T 718-2005 standard, and ferrosilicon is in GB/T 2272-2009 standard
FeSi75Al0.5-B；
C. toward nitrided ferromanganese and the low-carbon ferromanganese of 0.10 part of intermediate frequency furnace input 0.6 part, carry out nitrogen pick-up and increase manganese；Nitrided ferromanganese
Studying and be divided into Mn:75%, N:3.5%, C:0.50%, Si:3.5%, P:0.12%, S:0.01%, remaining is Fe；Low-carbon ferromanganese is GB/T
FeMn84C0.7 in 3795-2006 standard；
D. put into the silicon barium aluminum of 0.09 part according to the requirement of second time " burdening calculation result advice note " toward intermediate frequency furnace, increase
Aluminum, increasing silicon and deoxidation；Silicon barium aluminium alloy is the FeAl30Ba6Si20 in YB/T 066-2008 standard, by the molten steel in intermediate frequency furnace
After being heated to 1645 DEG C, stop intermediate frequency heating；
E. putting into aluminum steel 0.060 part toward steel ladle, the molten steel in intermediate frequency furnace is poured steel ladle and taps, aluminum steel can be to steel
Water carries out final deoxidizing, puts into deslagging agent deslagging toward steel ladle；
F. casting sand mold by steel ladle, sand mold is V method moulding, cast temperature 1560 DEG C, and the time cast from tapping to is 8
Minute, rear gained foundry goods of having cast is cast steel material foundry goods；
The chemical composition of foundry goods is after testing: C:0.32%, Si:0.26%, Mn:0.50, P:0.027%, S:0.035%, N:
0.025%, Al:0.020%, Mo:0.1%, V:0.03%, Ni:0.12%, Cu:0.08%, Cr:0.25%, remaining is for Fe and can not keep away
The impurity exempted from；
G., after step f has been cast 12 minutes, sand mold stops taking out negative pressure；After having cast 40 minutes, knockout that sand mold is unpacked, go
Desanding core and dead head obtain foundry goods；
H. to foundry goods ball blast 13 minutes；Remove the oxide skin of cast(ing) surface, sand grains, coating shell；
I. loading in car type furnace after foundry goods folds 5 layers the most successively according to bonnet, car type furnace is warming up to 870 DEG C, is incubated 150 minutes,
Stopping heating, half-open fire door is cooled to 460 DEG C, turns off fire door, is warming up to 650 DEG C, is incubated 180 minutes, and then car type furnace stops
Only heating, comes out of the stove foundry goods, and air cooling is to room temperature；
J. to foundry goods ball blast 18 minutes, axle housing body casting finished products is formed.
Embodiment 4:
The raw material of cast steel material includes the following components calculated by weight:
No. 35 steel: 58 parts, ZG270-500 steel: 34 parts, the pig iron: 0.48 part, ferrosilicon: 0.34 part, silicon barium aluminum: 0.1 part, aluminum steel
0.06 part, nitrided ferromanganese: 0.77 part, low-carbon ferromanganese: 0.25 part.
Iron content weight/mass percentage composition >=97% of ZG270-500 steel and No. 35 steel, the pig iron is in GB/T 718-2005 standard
Z18, ferrosilicon is the FeSi75Al0.5-B in GB/T 2272-2009 standard, and silicon barium aluminium alloy is YB/T 066-2008 standard
In FeAl30Ba6Si20, low-carbon ferromanganese is the FeMn84C0.7 in GB/T 3795-2006 standard；Mainization of nitrided ferromanganese
Study and be divided into Mn:72%-75%, N:0.35-4%, C :≤0.50%, Si :≤3.50%, P :≤0.30%, S :≤0.02%, remaining is
Fe。
The manufacture method of a kind of above-mentioned cast steel material equalizing type of suspension foundry goods, comprises the steps:
(1) by intermediate frequency furnace, above-mentioned material melting preparation is had the molten steel of following chemical composition of hundred parts of ratios by weight:
C:0.40%, Si:0.45%, Mn:0.80, P:0.035%, S:0.021%, N:0.03%, Al:0.060%, Mo:0.07%, V:
0.05%, Ni:0.2%, Cu:0.2%, Cr:0.12%, remaining is Fe and inevitable impurity；
Molten steel steel ladle is cast sand mold, and sand mold is V method moulding, cast temperature 1568 DEG C；
(2) having cast 12 minutes, sand mold stops taking out negative pressure；After having cast 35 minutes, knockout that sand mold is unpacked, removal core
Foundry goods is obtained with dead head,
(3) to foundry goods ball blast 12 minutes；
(4) loading in car type furnace by foundry goods, car type furnace is warming up to 866 DEG C, is incubated 140 minutes, stops heating, and half-open fire door cools down
To 400 DEG C, turning off fire door, be warming up to 640 DEG C, be incubated 190 minutes, then stop heating, come out of the stove by foundry goods, air cooling is to room
Temperature；
(5) to foundry goods ball blast 15 minutes, casting finished products is formed.
Above-described, only presently preferred embodiments of the present invention, it is impossible to limit the scope that this practicality is implemented, every depend on
Impartial change that scope of the present invention patent is made and decoration, all should still fall within the range of the present invention contains.
Claims (10)
1. cast steel material, its chemical composition consists of by weight percentage:
C:0.32-0.40%, Si:0.25-0.45%, Mn:0.50-0.80%, P :≤0.035%, S :≤0.035%, N:0.02-
0.03%, Al:0.020-0.060%, Mo :≤0.10%, V :≤0.05%, Ni :≤0.20%, Cu :≤0.20%, Cr :≤0.25%,
Remaining is Fe and inevitable impurity.
Cast steel material the most according to claim 1, it is characterised in that its raw material includes the following components calculated by weight:
No. 35 steel: 55-63 part, ZG270-500 steel: 30-35 part, the pig iron: 0.41-0.48 part, ferrosilicon: 0.06-0.34 part, silicon barium
Aluminum: 0.08-0.1 part, aluminum steel 0.049-0.06 part, nitrided ferromanganese: 0.5-0.77 part, low-carbon ferromanganese: 0-0.25 part.
Cast steel material the most according to claim 2, it is characterised in that ZG270-500 steel and No. 35 steel containing weight of iron hundred
Dividing content >=97%, the pig iron is the Z18 in GB/T 718-2005 standard, and ferrosilicon is in GB/T 2272-2009 standard
FeSi75Al0.5-B, silicon barium aluminium alloy is the FeAl30Ba6Si20 in YB/T 066-2008 standard, and low-carbon ferromanganese is GB/T
FeMn84C0.7 in 3795-2006 standard；The main chemical compositions of nitrided ferromanganese is: Mn:72%-75%, N:3.5-4%, C :≤
0.50%, Si :≤3.50%, P :≤0.30%, S :≤0.02%, remaining is Fe.
4. the manufacture method of the foundry goods of the cast steel material described in a claim 1-3 any one, it is characterised in that include as
Lower step:
A. toward putting into ZG270-500 steel 30-35 part by weight in intermediate frequency furnace and No. 35 steel 55-63 parts are smelted into molten steel, addition removes
Slag agent deslagging；
B. toward intermediate frequency furnace puts into pig iron 0.41-0.48 part and ferrosilicon 0.06-0.34 part, to be melted after, add deslagging agent deslagging；
C. put into nitrided ferromanganese 0.5-0.77 part and low-carbon ferromanganese 0-0.25 part toward intermediate frequency furnace, carry out nitrogen pick-up and increase manganese；
D. put into silicon barium aluminum 0.08-0.1 part toward intermediate frequency furnace, carry out increasing aluminum, increasing silicon and deoxidation, the molten steel in intermediate frequency furnace is heated to
After 1640-1650 DEG C, stop intermediate frequency heating；
E. put into aluminum steel 0.049-0.06 part toward steel ladle, the molten steel in intermediate frequency furnace is poured steel ladle and taps, toward molten steel
Bag puts into deslagging agent deslagging；
F. casting sand mold by steel ladle, cast temperature 1550-1580 DEG C, the time cast from tapping to controls at 10 minutes
Within, rear gained foundry goods of having cast is cast steel material foundry goods.
The manufacture method of foundry goods the most according to claim 4, it is characterised in that the sand mold of step e is V method moulding, also wraps
Include following steps:
G., after step f has been cast 10-15 minute, sand mold stops taking out negative pressure；After having cast 30-50 minute, sand mold is unpacked
Knockout, removal core and dead head obtain foundry goods；
H. to foundry goods ball blast 12-15 minute；
I. loading in car type furnace by foundry goods, car type furnace is warming up to 860-880 DEG C, is incubated 140-160 minute, stops heating, half-open
Fire door is cooled to 400-500 DEG C, turns off fire door, is warming up to 640-660 DEG C, is incubated 170-190 minute, and then car type furnace stops
Heating, comes out of the stove foundry goods, and air cooling is to room temperature；
J. to foundry goods ball blast 15-20 minute, casting finished products is formed.
The manufacture method of foundry goods the most according to claim 4, it is characterised in that the ZG270-500 steel in step a is steel
Bits, in step a, the method for ZG270-500 steel and No. 35 steel input intermediate frequency furnaces is: first put into ZG270-500 steel cuttings toward intermediate frequency furnace
15-17.5 part, to be melted after, then put into ZG270-500 steel cuttings 15-17.5 part and No. 35 steel 55-63 parts.
The manufacture method of foundry goods the most according to claim 4, it is characterised in that also include step between step b and step c
Rapid: b1. carries out chemical composition spectrum analysis for the first time to the liquid steel sampling in intermediate frequency furnace, contrast cast steel material according to analysis result
Chemical composition, the material addition calculating not enough composition generates for the first time " burdening calculation result advice note "；Step c and d can
Material addition according to " burdening calculation result advice note " for the first time requires to add nitrided ferromanganese, carbon ferromanganese, silicon barium aluminum.
The manufacture method of foundry goods the most according to claim 7, it is characterised in that also include step between step c and step d
Rapid: c1. carries out second time chemical composition spectrum analysis to the liquid steel sampling in intermediate frequency furnace, contrasts cast steel material according to analysis result
Chemical composition calculate the material addition of not enough composition and generate second time " burdening calculation result advice note ", step d can basis
The material addition of " burdening calculation result advice note " requires silicon barium aluminum for the second time；The whole process control of step c1 is in 5 minutes
Complete.
9. the manufacture method of the foundry goods of the cast steel material described in a claim 1-3 any one, it is characterised in that include as
Lower step:
(1) having the molten steel of above-mentioned cast steel material chemical composition by intermediate frequency furnace preparation, molten steel steel ladle is cast sand mold, sand mold
For V method moulding, cast temperature 1550-1580 DEG C；
(2) having cast 10-15 minute, sand mold stops taking out negative pressure；After having cast 30-50 minute, knockout that sand mold is unpacked, go
Desanding core and dead head obtain foundry goods,
(3) to foundry goods ball blast 12-15 minute；
(4) loading in car type furnace by foundry goods, car type furnace is warming up to 860-880 DEG C, is incubated 140-160 minute, stops heating, half-open
Fire door is cooled to 400-500 DEG C, turns off fire door, is warming up to 640-660 DEG C, is incubated 170-190 minute, then stops heating,
Being come out of the stove by foundry goods, air cooling is to room temperature；
(5) to foundry goods ball blast 15-20 minute, casting finished products is formed.
The manufacture method of foundry goods the most according to claim 9, it is characterised in that step (4) medium casting depends on down according to bonnet
Load in car type furnace after secondary folded 5 layers.
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| CN109234640A (en) * | 2018-11-16 | 2019-01-18 | 泉州市恒通机械配件有限公司 | A kind of cast steel and its production technology |
| CN110938775A (en) * | 2019-12-23 | 2020-03-31 | 泉州市恒通机械配件有限公司 | High-strength cast steel and manufacturing method thereof |
| CN111893398A (en) * | 2020-09-21 | 2020-11-06 | 江苏鼎泰工程材料有限公司 | Production method of casting for high-speed train brake carrier beam |
| CN111910133A (en) * | 2020-09-21 | 2020-11-10 | 江苏鼎泰工程材料有限公司 | Steel for brake carrier bar of high-speed train and casting |
| CN112338150A (en) * | 2020-10-20 | 2021-02-09 | 宁夏朗盛精密制造技术有限公司 | Micro-seismic pouring process for pump valve steel castings |
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Effective date of registration: 20180122 Address after: 364104 Fujian Yongding County, Fu City Town, Xi Cun village after the cave No. 11 Applicant after: Lu Senjia Address before: 364000 Longyan high tech Industrial Development Zone, Fujian Applicant before: Longyan Shengfeng Machinery Manufacturing Co., Ltd. |
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