CN108588544A - A kind of high-performance gray cast iron with comprehensive high-heat performance and mechanical property - Google Patents
A kind of high-performance gray cast iron with comprehensive high-heat performance and mechanical property Download PDFInfo
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- CN108588544A CN108588544A CN201810100371.5A CN201810100371A CN108588544A CN 108588544 A CN108588544 A CN 108588544A CN 201810100371 A CN201810100371 A CN 201810100371A CN 108588544 A CN108588544 A CN 108588544A
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- 229910001060 Gray iron Inorganic materials 0.000 title claims abstract description 59
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 86
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 27
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 20
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 17
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000011159 matrix material Substances 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 3
- 229910052718 tin Inorganic materials 0.000 claims abstract description 3
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 18
- 239000000126 substance Substances 0.000 claims description 3
- 229910001018 Cast iron Inorganic materials 0.000 abstract description 29
- 229910045601 alloy Inorganic materials 0.000 abstract description 15
- 239000000956 alloy Substances 0.000 abstract description 15
- 238000005266 casting Methods 0.000 abstract description 12
- 239000004576 sand Substances 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 239000004615 ingredient Substances 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 81
- 229910002804 graphite Inorganic materials 0.000 description 53
- 239000010439 graphite Substances 0.000 description 53
- 229910052742 iron Inorganic materials 0.000 description 36
- 229910052799 carbon Inorganic materials 0.000 description 28
- 239000011651 chromium Substances 0.000 description 19
- 239000011572 manganese Substances 0.000 description 15
- 229910000831 Steel Inorganic materials 0.000 description 14
- 239000010959 steel Substances 0.000 description 14
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 12
- 239000010949 copper Substances 0.000 description 12
- 239000007769 metal material Substances 0.000 description 12
- 238000011081 inoculation Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 11
- 229910001562 pearlite Inorganic materials 0.000 description 11
- 230000005496 eutectics Effects 0.000 description 10
- 238000010079 rubber tapping Methods 0.000 description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 239000010703 silicon Substances 0.000 description 9
- 238000005275 alloying Methods 0.000 description 8
- 238000001556 precipitation Methods 0.000 description 8
- 229910001566 austenite Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000009826 distribution Methods 0.000 description 6
- 229910001567 cementite Inorganic materials 0.000 description 5
- 210000001787 dendrite Anatomy 0.000 description 5
- 229910000859 α-Fe Inorganic materials 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 4
- VAKIVKMUBMZANL-UHFFFAOYSA-N iron phosphide Chemical compound P.[Fe].[Fe].[Fe] VAKIVKMUBMZANL-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- QIJNJJZPYXGIQM-UHFFFAOYSA-N 1lambda4,2lambda4-dimolybdacyclopropa-1,2,3-triene Chemical compound [Mo]=C=[Mo] QIJNJJZPYXGIQM-UHFFFAOYSA-N 0.000 description 3
- 229910039444 MoC Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005087 graphitization Methods 0.000 description 2
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910017112 Fe—C Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910000905 alloy phase Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- DPTATFGPDCLUTF-UHFFFAOYSA-N phosphanylidyneiron Chemical compound [Fe]#P DPTATFGPDCLUTF-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical 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 discloses a kind of high-performance gray cast iron with comprehensive high-heat performance and mechanical property, belong to new material technology field.The gray cast iron alloy ingredient is calculated according to mass fraction, contains C：3.0%~3.4%, Si：1.6%~2.1%, Cr：0.1%~0.6%, Mo：0.01%~1.2%, Mn：0.5%~1.3%, Cu：0.02~0.2%.Remaining as matrix element Fe and impurity element P<0.05%, S<0.05%, Ni<0.1%, Ti<0.01%, Sn<0.01%, N<0.01%, V<0.01%.The high-performance gray cast iron of the present invention is prepared using sand mould casting method, is not necessarily to Post isothermal treatment, simple for process.The high-performance cast iron room temperature tensile intensity is 250 400MPa, and room temperature thermal conductivity has comprehensive high thermal conductivity and mechanical property up to 52~60W/ (m*K), is suitable for the related stress conducting-heat elements material application field such as Automobile flywheel, brake disc.
Description
Technical field
The invention belongs to new material technology fields, and in particular to a kind of high property with comprehensive high-heat performance and mechanical property
Energy gray cast iron, is mainly used in the associated components such as Automobile flywheel, brake disc, cylinder body and cylinder cap.
Background technology
The development of casting iron technology is to push one of the important motivity of " Industrial Revolution ".With the development of science and technology, cast iron
It has been applied to the industrial circles such as bridge, rail, pipeline and automobile, has become basis most widely used in current metal material
One of material.Gray cast iron is due to its good casting character, wide use space, a variety of achievable mechanical performances and relatively low
Cost (than steel 20%-40%), so that it is had a wide range of applications in the industry.According to the 49th World Casting yield generaI investigation knot
Fruit, in 2014, for global casting total output more than 1.036 hundred million tons, the yield of medium cast iron accounted for the 70.8% of total casting output,
And the yield of gray cast iron has just accounted for the 45.8% of total casting output.
Since gray cast iron properties are good, at low cost, the automotive departments such as auto parts and components such as brake disc, flywheel have been widely used in it
Part.The waste heat that gray cast iron material can generate in rapid dispersion component, holding member are in lower temperature, maintaining member ruler
Very little stability and reduction internal stress.However, the progress with manufacturing technology and advanced automobile development of engine, to cast iron materials
Performance more stringent requirements are proposed, it is desirable that material not only has high intensity, while also having both high heat-conductive characteristic, tradition
Gray cast iron properties cannot be satisfied Hyundai Motor application needs.Therefore, exploitation has comprehensive high-heat performance and mechanical property
The important impetus that will develop as Hyundai Motor of high performance cast iron.
In traditional gray cast iron, heat-conductive characteristic and intensity are a pair of conflicting opposites.Main cause is：It improves
Gray cast iron heat-conductive characteristic makes sheet stone mainly by increasing the volume fraction of A type flake graphites in gray cast iron microscopic structure
Ink become large-sized, length increase, to enhance the heat-conducting effect of graphite, heat is enable to be conducted along graphite flake rapidly；And increase
Add the intensity of gray cast iron to be bound to the volume fraction of graphite to be reduced, and reduce the size of graphite, especially reduces the length of graphite flake
Degree, to reduce gray cast iron internal stress concentration generated on graphite flake in loading process, reduce formation of crack generation and its
The channel of extension.Therefore, to obtain comprehensive high thermal conductivity can be with the high-performance gray cast iron of mechanical property, it is necessary to balance graphite
Volume fraction and size and the distribution for optimizing graphite, while the intensity of matrix is improved as far as possible.
Alloying can improve matrix strength, can also control graphite score, form, improve good Graphite Distribution, be to improve ash
The important channel of cast iron heat-conductive characteristic and mechanical property.The adjustment of the constituent contents such as C, Si can control in gray cast iron in alloy
Content and form of graphite etc., and the optimization of the constituent contents such as Cr, Mo, Mn can improve the distribution of graphite and improve its matrix
Performance.
Carbon element content plays decisive role to the performance of cast iron.In cast iron, carbon is mainly in the form of graphite
In the presence of, and how much the content of carbon directly affects the height of Graphite in Cast Iron content.Carbon element content is to cast iron
Influence generally also can with element silicon, P elements content together, with carbon equivalent (Carbon Equivalent, CE) indicate,
Calculation formula is as follows：
Some researches show that when carbon equivalent increases, can directly result in the decline of casting strength and hardness.
Element silicon is one of important composition element in cast iron, it can effectively facilitate Graphite Precipitation, reduces chilling tendency.
In Fe-C alloy phase diagrams, under equilibrium condition, stability series (Fe- graphite) eutectic temperature is 1154 DEG C, and the steady system (Fe-Fe3C) that is situated between is total to
Brilliant temperature is 1148 DEG C, only 6 DEG C lower than stability series.In practical process of setting, the degree of supercooling and setting rate of cast iron are general
It is relatively large, therefore be easy to that Fe3C cementites are precipitated, cause spoken parts in traditional operas.This just need be added alloying element, expand stability series with
Be situated between the temperature difference for being surely, and carbon is made to be precipitated in the form of graphite.Element silicon plays indispensable role wherein, it can have
Effect inhibits carbon to form cementite with ferro element, to promote carbon to be precipitated in the form of graphite.With silicon content
Raising, stability series eutectic temperature gradually rises, and it is that eutectic temperature constantly declines to be situated between surely, as a result so that two be eutectic temperature difference not
It is disconnected to expand, therefore carbon is more prone to be precipitated in the form of graphite, to promote graphitization, it is suppressed that the generation of Fe3C, i.e.,
Reduce the tendency of air chill.There is document to show when silicon content is when between 1.5%~2.5%, its graphite to cast iron
It is most strong to change function and effect；When silicone content is more than 3%, graphitizing gradually weakens.Although element silicon is to promote Graphite Precipitation
Principal element, it is generally understood that, element silicon is easily solid-solution in austenite or ferrite matrix, significantly reduces the thermal conductivity of graphite
Rate.Research points out, when other conditions are constant, silicon content from 2.5% drop to 1.5% when, the thermal conductivity of cast iron improves
10% or so.
In gray cast iron, most of alloying elements can all hinder Graphite Precipitation, and the work of reduction is all played to the thermal conductivity of cast iron
With.The addition of molybdenum element is also mainly for hindering Graphite Precipitation in previous research.This is because molybdenum element can refine and change
Kind Graphite Distribution situation and refinement pearlite, the reduction of content of graphite and the refinement of size will reduce crackle from graphite flake
Locate the chance of germinating, it is thus possible to improve the mechanical property of gray cast iron.On the other hand, molybdenum element can change carbon member in gray cast iron
The distribution of element, chromium, element silicon causes the precipitation of the ferrite and molybdenum carbide of high heat conductance in the segregation area of molybdenum element.Molybdenum
Element can also refine the size of primary austenite dendrite and eutectic cell.The austenite dendrites of refinement will cause gray cast iron to be come into being
The number of austenite rises and austenite dendrites spacing is reduced.Largely between austenite dendrites and smaller austenite dendrites
Away from graphite length will be made to reduce simultaneously so that its distribution No yield point in eutectic cell.In conclusion the addition of molybdenum element will make
The refinement of graphite form and the decline of volume fraction and the solution strengthening of molybdenum element are beneficial to improve gray cast iron in gray cast iron
Mechanical property.The graphite in narrow segregation area and random orientation caused by the addition possibility of molybdenum element, while making adjacent
Average distance reduction is beneficial to improve its hot property between graphite flake.Molybdenum element is to obtain to have comprehensive high-heat performance and mechanical property
The high-performance gray cast iron important element of energy.
Chromium is that strong carbide is formed and stable element, it can be compound with cementite, constitutes stronger harder pearlite,
To improve cast iron intensity.However from another point of view, the addition of chromium inhibits carbon element to be precipitated in the form of graphite, i.e.,
The thermal conductivity of cast iron is reduced, while also increasing the tendency of cast iron air chill.When chromium is individually added, it will reduce ash
Structure of cast iron uniformity makes pearlitic structrure generate non-uniform microhardness.
Manganese element can promote pearlite to be precipitated, it is thus possible to improve cast iron intensity.Manganese element can also be with element sulphur simultaneously
In conjunction with MnS is formed, as the non-spontaneous forming core nucleus of Graphite Precipitation, promote Graphite Precipitation.P elements, element sulphur are one in cast iron
As be considered as harmful element, but a certain amount of element sulphur can improve the cutting ability of cast iron.Element sulphur can be with manganese element combination shape
At MnS.But excessive MnS can assemble, and form intensive arrangement, while weaken the alloying action of manganese element, reduce casting
Iron intensity.When phosphorus element content is more than 0.1% in casting, it just will appear iron phosphide eutectic.Iron phosphide eutectic is hard and crisp, and it is resistance to that cast iron can be improved
Mill property, certain wear-resisting high-phosphorous iron phosphorus contents are up to 0.6%.Alloying element can be segregated near iron phosphide eutectic, and weaken alloy
Effect.Meanwhile iron phosphide eutectic is nearby mushy freezing, will increase Shrinkage Porosity tendency.
Copper can promote graphitization to be formed, and reduce the chilling tendency of cast iron, while pearlite can be promoted to be formed, and increase pearl
The content of body of light, while pearlite can be refined and strengthen pearlite and ferrite therein, thus increase the hardness of cast iron and strong
Degree.
The purpose of the present invention is exactly to be rationally designed using alloy element, is provided a kind of with comprehensive high-heat performance and mechanics
The high-performance gray cast iron of performance can be applied to the stress heat transfer component such as Hyundai Motor flywheel, brake disc.The high-performance Cast Iron Production
There is simple process and low cost important application value and market potential to be worth.
Invention content
The purpose of the present invention is：It is an object of the invention to by design of alloy, utilize the interaction of alloy element
Effect, provides a kind of high-performance gray cast iron of comprehensive high-heat performance and mechanical property.The gray cast iron has C, Si content appropriate
To obtain A matrix shape graphite forms and content of graphite appropriate, and dividing for graphite is optimized by the alloying of Cr, Mo, Mn
Cloth increases the heat transfer efficiency of graphite and the intensity of matrix.The high-performance cast iron tensile strength is more than 250MPa, while its at room temperature
Thermal conductivity is up to 52-60W/ (m*K).
The technical scheme is that：
A kind of high-performance gray cast iron material with comprehensive high-heat performance and mechanical property of the present invention, chemical composition are pressed
It is C according to mass fraction：3.0%~3.4%, Si：1.6%~2.1%, Cr：0.1%~0.6%, Mo：0.01%~1.2%,
Mn：0.5%~1.3%, Cu：0.02%~0.2%, surplus is matrix element Fe and impurity element, and impurity element total amount is less than
0.3%.
Further, each composition quality score of impurity element is in the high-performance gray cast iron material：P<0.05%, S<
0.05%, Ni<0.1%, Ti<0.01%, Sn<0.01%, N<0.01% and V<0.01%.
The high-performance gray cast iron with comprehensive high-heat performance and mechanical property of the present invention, the gray cast iron microscopic structure
Middle graphite form is equally distributed flake graphite, and matrix is that complete pearlite or pearlite add a small amount of ferrite to constitute, with
The additive amount for molybdenum element increases, and has the precipitated phase of a small amount of eutectiform molybdenum carbide in gray cast iron matrix.
The preparation method of high-performance gray cast iron of the present invention with comprehensive high-heat performance and mechanical property, feature
It is the preparation method using sand casting, iron liquid tapping temperature is 1480 DEG C~1500 DEG C when cast, and pouring temperature is 1300 DEG C
~1360 DEG C, when cast, uses the 75SiFe inovulants that mass percent is added as 0.4-0.6% in the mode of current-following inoculation, pours into a mould
After be air-cooled to room temperature.
It is an advantage of the invention that：The gray cast iron obtains optimal microscopic structure by Alloying Design, comprehensive to reach
High mechanics and thermal conductivity.It is in particular in：(1) graphite form is equally distributed tiny bending A types in its microscopic structure
Flake graphite, the graphite form reduce the effect of isolating to matrix, are conducive to resist the rapid crack in deformation process,
Increase intensity；The A type graphite of fine uniform also reduces the adjacent distance risen between conductive force graphite flake simultaneously, to effectively
Ground increases the thermal conductivity performance of gray cast iron.(2) its matrix is that complete pearlite or pearlite add a small amount of ferrite to constitute, tiny layer
Piece thickness and the staggered pearlite of piece spacing will be so that castings of gray cast iron tensile strength increase.The especially conjunction of molybdenum element
Reason addition will cause molybdenum element solid solution or precipitation eutectiform molybdenum carbide in its matrix to cause invigoration effect, further increase grey casting
Iron intensity.The high-performance cast iron room temperature tensile intensity of the present invention is 250-400MPa, while room temperature thermal conductivity is up to 52-60W/
(m*K), have and obviously integrate high hot property and mechanical property, the thermal shock resistance of gray cast iron is effectively improved, in vapour
The industrial circles such as vehicle have important application value.
Description of the drawings
Fig. 1 is the typical graphite shape appearance figure of the common grey iron embodiment 1 of the present invention；
Fig. 2 is the typical graphite shape appearance figure of the common grey iron embodiment 5 of the present invention；
Fig. 3 is the typical substrates microstructure morphology of the high-performance gray cast iron embodiment 1 of the present invention；
Fig. 4 is the typical substrates microstructure morphology of the high-performance gray cast iron embodiment 5 of the present invention.
Specific implementation mode
The present invention is described in further details below.
The present invention is explained in more detail by following embodiment, in order to which those skilled in the art understand advantages of the present invention and spy
Sign.
Table 1 show the alloying component of embodiment.Wherein Examples 1 to 5 is the height in defined composition range of the present invention
Performance gray cast iron, embodiment 6-9 are non-this patent ingredient gray cast iron, wherein C, Mo, Mn and Si in embodiment 6,7,8 and 9
The content of element is respectively at outside this patent right composition range, and comparative illustration C, Mo, Mn and Si element is to cast iron respectively
Influence.
The step of preparation process of embodiment 1-9 is：
(1) Fe of high-purity, Si, Cr, Mo, Mn are weighed by composition proportion, (it is flat that graphite is added in the metal materials such as Cu when needing
Weigh carbon content), and foundry iron, steel scrap and the 75SiFe inovulants etc. that accordingly match.
(2) the good raw metal of said ratio, the pig iron and steel scrap are put into intermediate frequency furnace to being completely melt as molten iron.
Iron liquid tapping temperature is controlled at 1480 DEG C~1500 DEG C, is added mass percent 0.4-0.6%'s by the way of current-following inoculation
75SiFe inovulants.Pouring temperature is controlled at 1300 DEG C~1360 DEG C, is cooled to room temperature in sand mold mould hollow cold, you can is obtained
Gray cast iron ingot.
The chemical composition (mass percent) of 1 embodiment of table
| Embodiment | C | Si | Cr | Mo | Mn | Cu |
| Embodiment 1 | 3.05 | 1.88 | 0.27 | 0.03 | 1.17 | 0.03 |
| Embodiment 2 | 3.06 | 1.64 | 0.4 | 0.02 | 1.06 | 0.03 |
| Embodiment 3 | 3.05 | 1.95 | 0.14 | 0.27 | 1.04 | 0.028 |
| Embodiment 4 | 3.15 | 1.78 | 0.12 | 0.55 | 1.15 | 0.03 |
| Embodiment 5 | 3.04 | 1.88 | 0.15 | 1.05 | 0.99 | 0.03 |
| Embodiment 6 | 3.6 | 1.89 | 0.14 | 0.02 | 1.15 | 0.03 |
| Embodiment 7 | 3.07 | 1.76 | 0.14 | 2 | 0.66 | 0.03 |
| Embodiment 8 | 2.98 | 1.67 | 0.14 | 0.02 | 0.2 | 0.028 |
| Embodiment 9 | 3.06 | 3.0 | 0.17 | 0.02 | 1.09 | 0.03 |
Embodiment 1：By the Fe of high-purity, Si, Cr, Mo, Mn, the metal materials such as Cu (are added graphite balance carbon to contain when needing
Amount) and foundry iron, steel scrap be put into intermediate frequency furnace after being weighed according to composition proportion shown in alloy 1 in table 1 to completely molten
Turn to molten iron.Iron liquid tapping temperature is controlled at 1480 DEG C, uses the mode of current-following inoculation that mass percent is added as 0.6%
75SiFe inovulants.Pouring temperature is controlled at 1340 DEG C, is cooled to room temperature in sand mold mould, you can obtains gray cast iron ingot.
Embodiment 2：By the Fe of high-purity, Si, Cr, Mo, Mn, the metal materials such as Cu (are added graphite balance carbon to contain when needing
Amount) by the Fe of high-purity, Si, Cr, the metal materials such as Mo, Mn (graphite is added when needing and balances carbon content) and foundry iron,
Steel scrap is put into intermediate frequency furnace after being weighed according to composition proportion shown in alloy 2 in table 1 to being completely melt as molten iron.Iron liquid is come out of the stove
Temperature is controlled at 1480 DEG C, uses the mode of current-following inoculation that mass percent is added as 0.5% 75SiFe inovulants.Cast temperature
Degree control is cooled to room temperature at 1340 DEG C in sand mold mould, you can obtains gray cast iron ingot.
Embodiment 3：By the Fe of high-purity, Si, Cr, Mo, Mn, the metal materials such as Cu (are added graphite balance carbon to contain when needing
Amount) and and foundry iron, steel scrap be put into intermediate frequency furnace to complete after being weighed according to composition proportion shown in alloy 3 in table 1
Fine melt turns to molten iron.Iron liquid tapping temperature is controlled at 1480 DEG C, uses the mode of current-following inoculation that mass percent is added as 0.4%
75SiFe inovulants.Pouring temperature is controlled at 1350 DEG C, is cooled to room temperature in sand mold mould, you can obtains gray cast iron ingot
Material.
Embodiment 4：By the Fe of high-purity, Si, Cr, Mo, Mn, the metal materials such as Cu (are added graphite balance carbon to contain when needing
Amount) and foundry iron, steel scrap be put into intermediate frequency furnace after being weighed according to composition proportion shown in alloy 4 in table 1 to completely molten
Turn to molten iron.Iron liquid tapping temperature is controlled at 1480 DEG C, uses the mode of current-following inoculation that mass percent is added as 0.6%
75SiFe inovulants.Pouring temperature is controlled at 1350 DEG C, is cooled to room temperature in sand mold mould, you can obtains gray cast iron ingot.
Embodiment 5：By the Fe of high-purity, Si, Cr, Mo, Mn, the metal materials such as Cu (are added graphite balance carbon to contain when needing
Amount) and foundry iron, steel scrap be put into intermediate frequency furnace after being weighed according to composition proportion shown in alloy 5 in table 1 to completely molten
Turn to molten iron.Iron liquid tapping temperature is controlled at 1490 DEG C, uses the mode of current-following inoculation that mass percent is added as 0.5%
75SiFe inovulants.Pouring temperature is controlled at 1360 DEG C, is cooled to room temperature in sand mold mould, you can obtains gray cast iron ingot.
Embodiment 6：By the Fe of high-purity, Si, Cr, Mo, Mn, the metal materials such as Cu (are added graphite balance carbon to contain when needing
Amount) and foundry iron, steel scrap according to composition proportion shown in alloy 6 in table 1 weigh after after be put into intermediate frequency furnace to complete
It is molten into molten iron.Iron liquid tapping temperature is controlled at 1490 DEG C, uses the mode of current-following inoculation that mass percent is added as 0.47%
75SiFe inovulants.Pouring temperature is controlled at 1360 DEG C, is cooled to room temperature in sand mold mould, you can obtains gray cast iron ingot
Material.
Embodiment 7：By the Fe of high-purity, Si, Cr, Mo, Mn, the metal materials such as Cu (are added graphite balance carbon to contain when needing
Amount) and foundry iron, steel scrap be put into intermediate frequency furnace after being weighed according to composition proportion shown in alloy 7 in table 1 to completely molten
Turn to molten iron.Iron liquid tapping temperature is controlled at 1500 DEG C, uses the mode of current-following inoculation that mass percent is added as 0.6%
75SiFe inovulants.Pouring temperature is controlled at 1370 DEG C, is cooled to room temperature in sand mold mould, you can obtains gray cast iron ingot.
Embodiment 8：By the Fe of high-purity, Si, Cr, Mo, Mn, the metal materials such as Cu (are added graphite balance carbon to contain when needing
Amount) and foundry iron, steel scrap and the foundry iron, the steel scrap that accordingly match claim according to composition proportion shown in alloy 8 in table 1
It is put into after amount in intermediate frequency furnace to being completely melt as molten iron.Iron liquid tapping temperature is controlled at 1500 DEG C, using current-following inoculation
The 75SiFe inovulants that mass percent is 0.59% are added in mode.Pouring temperature is controlled at 1380 DEG C, cold in sand mold mould
But to room temperature, you can obtain gray cast iron ingot.
Embodiment 9：By the Fe of high-purity, Si, Cr, Mo, Mn, the metal materials such as Cu (are added graphite balance carbon to contain when needing
Amount) and foundry iron, steel scrap and the foundry iron, the steel scrap that accordingly match claim according to composition proportion shown in alloy 8 in table 1
It is put into after amount in intermediate frequency furnace to being completely melt as molten iron.Iron liquid tapping temperature is controlled at 1500 DEG C, using current-following inoculation
The 75SiFe inovulants that mass percent is 0.59% are added in mode.Pouring temperature is controlled at 1360 DEG C, cold in sand mold mould
But to room temperature, you can obtain gray cast iron ingot.
Table 2 show the gray cast iron typical case mechanics and thermal conductivity of embodiment preparation.Fig. 1 to Fig. 4 is respectively 1 He of embodiment
5 typical metallographic microstructure of example and typical micro-organization chart.
The typical performance of 2 embodiment gray cast iron of table
Serial number room temperature tensile intensity (MPa) room temperature thermal conductivity (W/ (m*K))
Claims (2)
1. a kind of high-performance gray cast iron material with comprehensive high-heat performance and mechanical property, chemical composition is according to mass fraction
For C：3.0%~3.4%, Si：1.6%~2.1%, Cr：0.1%~0.6%, Mo：0.01%~1.2%, Mn：0.5%~
1.3%, Cu：0.02%~0.2%, surplus is matrix element Fe and impurity element, and impurity element total amount is less than 0.3%.
2. a kind of high-performance gray cast iron material with comprehensive high-heat performance and mechanical property as described in claim 1, special
Sign is：Each composition quality score of impurity element is in the high-performance gray cast iron material：P<0.05%, S<0.05%, Ni<
0.1%, Ti<0.01%, Sn<0.01%, N<0.01% and V<0.01%.
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| CN109811249A (en) * | 2019-03-01 | 2019-05-28 | 广西玉柴机器股份有限公司 | A kind of 300Mpa gray cast iron material and its production method and the cylinder of diesel engine prepared using the material |
| CN109837453A (en) * | 2019-04-16 | 2019-06-04 | 郑州大学 | A kind of production method of the workbench of planer |
| CN110079726A (en) * | 2019-06-01 | 2019-08-02 | 亚新科国际铸造（山西）有限公司 | A kind of technique improving gray cast iron engine cylinder cover room temperature drawingand pressing fatigue intensity |
| CN113913678A (en) * | 2021-08-31 | 2022-01-11 | 宁国东方碾磨材料股份有限公司 | Wear-resistant belt pulley for automobile or ship and preparation method thereof |
| CN114672719A (en) * | 2022-04-13 | 2022-06-28 | 宜宾普什联动科技有限公司 | Preparation method for high-strength thin-wall gray cast iron containing A-type graphite and gray cast iron |
| CN115415505A (en) * | 2022-08-30 | 2022-12-02 | 南京钢铁股份有限公司 | Casting process of cast iron cooling bottom plate |
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| CN109811249A (en) * | 2019-03-01 | 2019-05-28 | 广西玉柴机器股份有限公司 | A kind of 300Mpa gray cast iron material and its production method and the cylinder of diesel engine prepared using the material |
| CN109837453A (en) * | 2019-04-16 | 2019-06-04 | 郑州大学 | A kind of production method of the workbench of planer |
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| CN110079726A (en) * | 2019-06-01 | 2019-08-02 | 亚新科国际铸造（山西）有限公司 | A kind of technique improving gray cast iron engine cylinder cover room temperature drawingand pressing fatigue intensity |
| CN113913678A (en) * | 2021-08-31 | 2022-01-11 | 宁国东方碾磨材料股份有限公司 | Wear-resistant belt pulley for automobile or ship and preparation method thereof |
| CN114672719A (en) * | 2022-04-13 | 2022-06-28 | 宜宾普什联动科技有限公司 | Preparation method for high-strength thin-wall gray cast iron containing A-type graphite and gray cast iron |
| CN115415505A (en) * | 2022-08-30 | 2022-12-02 | 南京钢铁股份有限公司 | Casting process of cast iron cooling bottom plate |
| CN115415505B (en) * | 2022-08-30 | 2024-01-09 | 南京钢铁股份有限公司 | Casting process of cast iron cooling bottom plate |
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