CN106048396A - Low-temperature-resistant high-nickel austenite spheroidal graphite cast iron and preparing method thereof - Google Patents
Low-temperature-resistant high-nickel austenite spheroidal graphite cast iron and preparing method thereof Download PDFInfo
- Publication number
- CN106048396A CN106048396A CN201610542774.6A CN201610542774A CN106048396A CN 106048396 A CN106048396 A CN 106048396A CN 201610542774 A CN201610542774 A CN 201610542774A CN 106048396 A CN106048396 A CN 106048396A
- Authority
- CN
- China
- Prior art keywords
- nickel
- iron
- cast iron
- molten iron
- resistant high
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- C22C37/04—Cast-iron alloys containing spheroidal graphite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
-
- 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
- C22C37/08—Cast-iron alloys containing chromium with nickel
-
- 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
-
- 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
Abstract
The invention discloses low-temperature-resistant high-nickel austenite spheroidal graphite cast iron and a preparing method thereof. The low-temperature-resistant high-nickel austenite spheroidal graphite cast iron comprises, by weight percent, 2.1%-2.2% of carbon, 1.6%-1.8% of silicon, 34%-34.5% of nickel, 2.0%-2.1% of chrome and 1.5%-1.7% of manganese; and the carbon equivalent ranges from 4.1%-4.4%, the content of copper is smaller than 0.5% by weight percent, the content of phosphorus is smaller than 0.05% by weight percent, the content of sulphur is smaller than 0.03% by weight percent, and lead and aluminum are not contained. Low-temperature-resistant high-nickel austenite spheroidal graphite of the low-temperature-resistant high-nickel austenite spheroidal graphite cast iron can be obtained on an austenite matrix, basically contains no flake graphite, wormlike graphite and chunky graphite and is all metallographic structures of the spheroidal graphite, the content of the spheroidal graphite in the metallographic structures exceeds 80%, the size of the graphite is divided into six stages, and materials have the excellent tensile property, the heat expansion resistant property and the low-temperature-resistant property.
Description
Technical field
The present invention relates to spheroidal graphite cast-iron, particularly the technical field of high-nickel austenite nodular cast iron.
Background technology
Spheroidal graphite cast-iron is a kind of high-strength cast iron material, and main nodularization and the inoculation passed through is in the structure of cast iron
Obtain spherical graphite, thus be effectively increased the mechanical performance of cast iron, particularly plasticity and toughness.Spheroidal graphite cast-iron combination property
Close to steel, there is high intensity, high tenacity, high-wearing feature, can be complicated at stressing conditions, intensity, toughness, wearability require high
Use under environment, reach the effect of " with ferrum for steel ".Spheroidal graphite cast-iron has developed rapidly as being only second to casting pig, application ten at present
Divide cast iron materials widely.
High-nickel austenite nodular cast iron refers to that nickel content is 13 ~ 36%, obtains austenitic matrix, and wherein stone under as cast condition
Ink is in spherical cast iron, for the special kinds in spheroidal graphite cast-iron.At configuration aspects austenite ductile cast iron, there is atom compact reactor
Long-pending centroid cubic lattice structure, has stable austenite structure at normal temperatures, therefore has than common spheroidal graphite cast-iron and silicon
The highest thermo-chemical stability of molybdenum spheroidal graphite cast-iron is at aspect of performance, at aspect of performance, its combine spheroidal graphite cast-iron, high nickel cast iron,
In place of the advantage of austenitic cast iron, possess excellence thermal-shock resistance, heat creep resistance, corrosion resistance, high-temperature oxidation resistance and
Low thermal expansivity and low-temperature impact toughness, can be widely applied to manufacture sea water pump, valve, pressurizer shell, exhaustor, valve seating
Etc. heat-resisting, anti-corrosion parts product, application prospect is the most wide.
Summary of the invention
It is an object of the invention to obtain a kind of metallographic structure perfect, processing performance is excellent, low low temperature resistant of production cost
High-nickel austenite nodular cast iron, the present invention also aims to obtain a kind of preparation process simple and easy to control, and preparation cost is relatively low, can
Obtain the preparation method of this high-nickel austenite nodular cast iron.
Technical scheme is as follows:
A kind of low temperature resistant high-nickel austenite nodular cast iron, including following components: carbon, 1.6～the 1.8wt%'s of 2.1～2.2wt%
The chromium of the nickel of silicon, 34～34.5wt%, 2.0～2.1wt%, the manganese of 1.5 ~ 1.7wt%, and its carbon equivalent is 4.1～4.4%, copper
Content is less than 0.5wt%, and the content of phosphorus is less than 0.05wt%, and the content of sulfur is less than 0.03wt%, does not contains lead and aluminum.
Herein, what carbon equivalent referred to is the summation of the content of carbon by each alloying element conversion in cast iron, and it greatly reflects
Drawing abillity and application performance.
The requirement of the chemical composition to high-nickel austenite nodular cast iron is had, such as the one in ductile Ni-resist cast iron in GB
QTANi35Cr3, its chemical composition in GB/T26648-2011 requires as follows:
But for cast iron materials, the wherein difference of concrete component content between different component, the metallographic structure that reality is produced
The impact of form, materials application performance, difficulty of processing and end product quality is great.
As in ductile Ni-resist cast iron, the content of carbon not only determines quantity and the distributional pattern of graphite, and in processing
The impact of the Production Practice of Casting Technologies such as the mobility of material, contractility, chilling tendency is very big, if carbon content is too low, and the spheroidal graphite obtained
The intensity of cast iron is relatively low, and carbon content is too high, and graphite can be made to become chunky shape to be distributed, and is all unfavorable for obtaining the nickelic spheroidal graphite of function admirable
Cast iron.
In ductile Ni-resist cast iron, the content of silicon can affect the thermostability of material, and it contains with the carbon in ductile Ni-resist cast iron simultaneously
Amount and nickel content can work in coordination with the form affecting Graphite in Cast Iron, when when between carbon, silicon, nickel three, content collocation is incorrect, and graphite meeting
Occur with the form of chunky shape.
On the one hand in ductile Ni-resist cast iron, the content of nickel affects the application performance of material, such as non-oxidizability, thermal expansivity, separately
On the one hand formation and the form of austenite in material, and the form of graphite are also affected, when the content of wherein nickel is too small, austenite
Can not be formed at general temperature, its non-oxidizability is the most poor, and when its content is excessive, production cost is higher, and in material, graphite is not
Can occur with spherical-like morphology.
Chromium in ductile Ni-resist cast iron is a kind of important element, and a small amount of chromium can be fused to austenitic matrix, is conducive to Austria
Stablizing of family name's body, and more preferable thermostability and corrosion resistance can be obtained with nickel synergism, chromium is strong carbide shape but then
Becoming element, it can form evanohm distribution of carbides in intergranular, affect the cutting ability of material, the elongation of reduction material
Rate and impact resistance, can increase the shrinkage porosite tendency of ductile Ni-resist cast iron simultaneously, increase casting difficulty.
Additionally, the segregation of the manganese in ductile Ni-resist cast iron can generate sclerotic tissue, phosphorus is typically presented in iron phosphide eutectic
In crystal boundary, when content is excessive, both of which can affect the mechanical property of material.
Present invention further proposes the preparation method of a kind of low temperature resistant high-nickel austenite nodular cast iron, including following step
Rapid:
(1) ferrochrome is added at the bottom of smelting furnace, sequentially add high-purity pig iron, rustless steel scrap and foundry returns, melt, obtain
First molten iron；
(2) the first molten iron is warming up to 1410 ~ 1460 DEG C, adds thereafter cathode copper, ferromanganese, elemental nickel, obtain the second molten iron；
(3) the second molten iron is continuously heating to 1500 DEG C ~ 1550 DEG C, carries out spheroidising and inoculation, obtain the 3rd molten iron；
(4) the 3rd molten iron is poured into a mould, i.e. obtain described high-nickel austenite nodular cast iron；
Wherein said ferrochrome, high-purity pig iron, rustless steel scrap, foundry returns, cathode copper, ferromanganese, elemental nickel and spheroidising use
Nodulizer, the total amount of inovulant that uses in inoculation meet that described high-nickel austenite nodular cast iron is included is following
Component: the chromium of the nickel of the silicon of carbon, 1.6～1.8wt%, 34～34.5wt%, 2.0～2.1wt% of 2.1～2.2wt%, 1.5 ~
The manganese of 1.7wt%, and its carbon equivalent is 4.1～4.4%, the content of copper is less than 0.5wt%, and the content of phosphorus is less than 0.05wt%, sulfur
Content is less than 0.03wt%, does not contains lead and aluminum.
Foundry returns described herein be in low temperature resistant high-nickel austenite nodular cast iron preparation process produce waste casting, water
The old metal such as mouth, rising head.
Smelting furnace is preferably used mandreless spinning, adds each composition in smelting furnace the purest, the most not
Lead and aluminum can be mixed into, if molten iron is mixed into the lead of 0.003%, then it is possible to Wei Shi graphite occurs in microscopic structure, make the mechanics of materials
Performance substantially reduces, if being mixed into aluminum, then may make to occur in material needle pore defect, and other trace element such as Pb, Ti, As etc. are the most no
Should be mixed into wherein, the interference of these trace harmful elements is one of reason producing flake graphite.
Because nickel has extremely strong inspiratory, for preventing molten iron air-breathing, nickel addition in step (2) should be and is eventually adding,
Thereafter molten iron thermal insulation deslagging to be added coverture carries out melting.
In above-mentioned steps, add each composition in smelting furnace except in addition to basic addition, also can be at spectral measurement hot metal composition
After being adjusted property add.
The fusing point of ductile Ni-resist cast iron is higher, and the mobility of molten iron is poor, therefore for ensureing enough pouring temperatures,
Overtemperature before molten iron is come out of the stove is preferably high than general spheroidal graphite cast-iron 50 ~ 100 DEG C.
In high-nickel austenite nodular cast iron fusion process, the air-breathing tendency of molten iron is more than general spheroidal graphite cast-iron, particularly melts down
When material content is the most, its air-breathing tendency is bigger, therefore, has rust, has the furnace charge of greasy dirt or humidity can only put into the heat not having ferrum liquid
In stove, it is impossible to direct plunge into use.Additionally, should be specifically noted that the furnace charge that can not use rust redly, because of wherein containing hydroxide
Ferrum, its stability is very strong, is not easily decomposed below 320 DEG C, and hydrogen is not easily formed water analysis and goes out and evaporate.
Because of graphite, to fuse into the high ferrum liquor ratio of nickel content relatively slow, and thereafter form generation with stable by its impact substantially,
Therefore for making the graphite in the pig iron and foundry returns can be substantially soluble in ferrum liquid and generating stable spherical in follow-up technique,
Both compositions have the most i.e. carried out shove charge as first batch of material in the present invention.If after late detection component content
Need scalability in molten iron to add the furnace charge of this kind of graphitiferous, then after it adds, at least should be incubated 10 points upon an over-temperature condition
Clock.
In fusion process, should avoid the highest overtemperature and long temperature retention time, foundry returns also should not be the most anti-
Multiple use, these factors all can cause the degree of supercooling of cast iron to increase, make carbide content in tissue increase.
Preferred: the ferrochrome in described step (1) is high carbon ferro-chrome, wherein the mass fraction of chromium is 61%～65%.
It is also preferred that: the high-purity pig iron in described step (1) is low-sulfur high-purity pig iron, wherein sulfur content≤
0.03wt%。
It is also preferred that: the ferromanganese in described step (2) is high carbon ferromanganese.
It is also preferred that: the described elemental nickel in described step (2) is electrolytic nickel.
It is also preferred that: described step (3) includes procedure below:
1) use and pour method and carry out spheroidising, first nodulizer is added the side in magnesium iron bag, thereafter by the first inovulant
Uniform fold is on nodulizer；
2) the second molten iron is continuously heating to molten iron discharging when 1520 DEG C ~ 1570 DEG C, makes molten iron go out in the side not adding nodulizer
Water, complete to nodularization；
3) removed step 2) after the scum silica frost on molten iron surface, be added thereto to the second inovulant, i.e. obtain after having reacted
3rd molten iron.
It may further be preferable that use dam-type to pour method in step 1) carry out spheroidising, nodulizer adds magnesium iron bag
Interior dykes and dams side, during molten iron discharging, molten iron is facing to the side being unkitted nodulizer.
Above-mentioned preparation method it is also preferred that: described nodulizer be Mg content be the nickel magnesium alloy of 15 ~ 30wt%, its use
Amount is the 1% ~ 2% of described second molten iron gross mass.
The most described nodulizer is Ni70Mg30 nickel magnesium nodulizer or/and Ni85Mg15 nickel magnesium nodulizer.
Described nodulizer is further preferably Ni85Mg15 nickel magnesium nodulizer, and it is cast with described high-nickel austenite spheroidal graphite
In ferrum other component and nodularization temperature etc. match, collaborative after available Oxygen potential is higher, the more preferable nickelic Ovshinsky of mechanical property
Body spheroidal graphite cast-iron.
Above-mentioned preparation method it is also preferred that: described first inovulant is 75% ferrosilicon, and its consumption is described second molten iron
The 1% ~ 2% of gross mass, described second inovulant is 75% ferrosilicon, and its consumption is the 1/3 ~ 1/2 of the first inovulant.
In this preparation method, the process of inoculation have employed twice and breeds, and wherein adds breeding of the first inovulant
Breeding for the bag end, add the second inovulant breeds for instant inoculation, in this preparation method, and process that the bag end breeds and nodularization
The process processed starts simultaneously at, and mutually promotes, has both saved the energy and cost, has reached again the effect of integrated potentiation, instantaneous pregnant
Educate further intensive inoculation effect, slow down decaying spheroidisation, made nickelic Austria that metallographic structure is perfect, application performance is excellent
Family name's body spheroidal graphite cast-iron.
Above-mentioned preparation method it is also preferred that: described in described step (4) cast temperature be 1520 DEG C～1450 DEG C.
In cast, preferably first moulding by casting chill block, observe fracture situation, be further carried out watering on a large scale
Note.
The invention have the benefit that
(1) the high-nickel austenite nodular cast iron application performance that obtains is excellent, high-nickel austenite nodular cast iron itself possess excellent
On optimum energy, also there is preferable tensile property, preferable heat resistanceheat resistant expansion character；
(2) significantly reduce production cost, decrease production difficulty；
(3) foundry returns is recycled, and drastically increases energy utilization rate, energy-conserving and environment-protective；
(4) coordinate the content of this each component of low temperature resistant high-nickel austenite nodular cast iron, have employed special preparation process and preparation
Condition, spheroidising and the excellent effect of inoculation, can obtain being substantially free of flake graphite, anthelmintic on austenitic matrix
Shape graphite, chunky graphite, and the metallographic structure of all globular graphites, surveyed by austenitic cast iron GB (GB/T 26648)
Examination, the graphite size obtained is 6 grades, uniformly, stablizes；
(5) under relatively low production cost with difficulty of processing, always containing of the spherical Spheroidal Graphite In Cast Irons of high-nickel austenite obtained
Amount can be more than 80%, if using Ni85Mg15 nodulizer further, the content of globular graphite can be more than 90%；
(6) the high-nickel austenite nodular cast iron resistance to low temperature obtained is excellent.
Accompanying drawing explanation
Fig. 1 is that the present invention uses Ni70Mg30 as metallographic structure figure during nodulizer.
Fig. 2 is that the present invention uses Ni85Mg15 as metallographic structure figure during nodulizer.
Detailed description of the invention
Embodiment 1
(1) 6kg ferrochrome is added mandreless spinning furnace bottom, sequentially add 115kgQ12 high-purity pig iron and 100kg returns
Furnace charge, melts, and obtains the first molten iron；
(2) the first molten iron being warming up to 1410 DEG C, stokehold chemical examination is done in sampling, adds thereafter ferromanganese 2kg, electrolytic nickel 82kg, obtains
Second molten iron；
(3) the second molten iron being continuously heating to 1500 DEG C, be ready for spheroidising and inoculation, its process is: by 4.5kg
Ni70Mg30 nodulizer adds magnesium iron bag dykes and dams side, thereafter by 1.8kg75% ferrosilicon uniform fold on nodulizer, the second ferrum
Water is continuously heating to molten iron discharging when 1520 DEG C in smelting furnace mandreless spinning, and iron water amount is the 2/3 of total iron water amount, ferrum
Water carries out water outlet in the side not adding nodulizer, goes out to remain molten iron again to nodularization completely；
(4) remove the scum silica frost on the molten iron surface after step (3), taken wedge test piece, observe nodularization the most successful；
(5) in the molten iron completing step (4), add 0.6kg75% ferrosilicon and carry out late inoculation, after having reacted, i.e. obtain
Three molten iron, pour into a mould the 3rd molten iron at 1450 DEG C, i.e. obtain described low temperature resistant high-nickel austenite nodular cast iron；
After tested, its Oxygen potential is 82%, and metallographic structure as shown in Figure 1, is wherein substantially free of flake graphite, vermiform stone
Ink, chunky graphite, and all globular graphites, globular graphite total content is more than 80%, and graphite size is 6 grades；
Specifeca tion speeification is as follows:
Tensile strength Ra 370～450MPa yield strength Rp0.2 220～240MPa
Percentage elongation A 7～10% Brinell hardness 150～180HBW.
Embodiment 2
(1) 10kg ferrochrome is added mandreless spinning furnace bottom, sequentially add 150kgQ12 high-purity pig iron, 50kg rustless
Steel scrap and 200kg foundry returns, melt, and obtains the first molten iron after fusing completely；
(2) the first molten iron being warming up to 1450 DEG C, stokehold chemical examination is done in sampling, adds thereafter cathode copper 1kg, ferromanganese 4kg, electrolytic nickel
140kg, obtains the second molten iron；
(3) the second molten iron being continuously heating to 1510 DEG C, be ready for spheroidising and inoculation, its process is: will
7.6kgNi85Mg15 nodulizer adds magnesium iron bag dykes and dams side, thereafter by 3kg75% ferrosilicon uniform fold on nodulizer, second
Molten iron is continuously heating to molten iron discharging when 1530 DEG C in mandreless spinning, and iron water amount is the 2/3 of total iron water amount, and molten iron exists
The side not adding nodulizer carries out water outlet, goes out to remain molten iron again to nodularization completely；
(4) remove the scum silica frost on the molten iron surface after step (3), taken wedge test piece, observe nodularization the most successful；
(5) in the molten iron completing step (4), add 1kg75% ferrosilicon and carry out late inoculation, after having reacted, i.e. obtain the 3rd
Molten iron, pours into a mould the 3rd molten iron at 1500 DEG C DEG C, i.e. obtains described low temperature resistant high-nickel austenite nodular cast iron；
After tested, its Oxygen potential is 98%, and metallographic structure as shown in Figure 2, is wherein substantially free of flake graphite, vermiform stone
Ink, chunky graphite, and all globular graphites, globular graphite total content is 95%, and graphite size is 6 grades；
Many sample testings, Specifeca tion speeification is as follows:
Extension test result
Thermal expansion test result
Embodiment 3
(1) 6kg ferrochrome is added at the bottom of smelting furnace, sequentially add 115kgQ12 high-purity pig iron and 100kg foundry returns, melt
Change, obtain the first molten iron；
(2) the first molten iron being warming up to 1460 DEG C, stokehold chemical examination is done in sampling, adds thereafter cathode copper 1kg, ferromanganese 2kg, electrolytic nickel
82kg, obtains the second molten iron；
(3) the second molten iron being continuously heating to 1550 DEG C, be ready for spheroidising and inoculation, its process is: by 4.5kg
Ni85Mg15 nodulizer adds magnesium iron bag dykes and dams side, thereafter by 1.8kg75% ferrosilicon uniform fold on nodulizer, the second ferrum
Water is continuously heating to molten iron discharging when 1570 DEG C in smelting furnace, and iron water amount is the 2/3 of total iron water amount, and molten iron is not adding nodulizer
Side carries out water outlet, goes out to remain molten iron again to nodularization completely；
(4) remove the scum silica frost on the molten iron surface after step (3), taken wedge test piece, observe nodularization the most successful；
(5) in the molten iron completing step (4), add 0.6kg75% ferrosilicon and carry out late inoculation, after having reacted, i.e. obtain
Three molten iron, pour into a mould the 3rd molten iron at 1520 DEG C, i.e. obtain described low temperature resistant high-nickel austenite nodular cast iron；
After tested, its Oxygen potential is 94%, is substantially free of flake graphite, quasiflake graphite, chunky graphite in metallographic structure,
And all globular graphites, globular graphite total content is 92%, and graphite size is 6 grades.
Although reference be made herein to invention has been described for the explanatory embodiment of the present invention, and above-described embodiment is only this
Bright preferably embodiment, embodiments of the present invention are also not restricted to the described embodiments, it should be appreciated that people in the art
Member can be designed that a lot of other amendments and embodiment, and these amendments and embodiment will fall in principle disclosed in the present application
Within scope and spirit.
Claims (10)
1. a low temperature resistant high-nickel austenite nodular cast iron, it is characterised in that: include following components: the carbon of 2.1～2.2wt%,
The chromium of the nickel of silicon, 34～34.5wt%, 2.0～2.1wt% of 1.6～1.8wt%, the manganese of 1.5 ~ 1.7wt%, and its carbon equivalent is
4.1～4.4%, the content of copper is less than 0.5wt%, and the content of phosphorus is less than 0.05wt%, and the content of sulfur is less than 0.03wt%, does not contains lead
And aluminum.
2. the preparation method of a low temperature resistant high-nickel austenite nodular cast iron, it is characterised in that: comprise the following steps:
(1) ferrochrome is added at the bottom of smelting furnace, sequentially add high-purity pig iron, rustless steel scrap and foundry returns, melt, obtain
First molten iron；
(2) the first molten iron is warming up to 1410 ~ 1460 DEG C, adds thereafter cathode copper, ferromanganese, elemental nickel, obtain the second molten iron；
(3) the second molten iron is continuously heating to 1500 DEG C ~ 1550 DEG C, carries out spheroidising and inoculation, obtain the 3rd molten iron；
(4) the 3rd molten iron is poured into a mould, i.e. obtain described low temperature resistant high-nickel austenite nodular cast iron；
Wherein said ferrochrome, high-purity pig iron, rustless steel scrap, foundry returns, cathode copper, ferromanganese, elemental nickel and spheroidising use
Nodulizer, the inovulant that uses in inoculation meets and makes described low temperature resistant high-nickel austenite nodular cast iron include following
Component: the chromium of the nickel of the silicon of carbon, 1.6～1.8wt%, 34～34.5wt%, 2.0～2.1wt% of 2.1～2.2wt%, 1.5 ~
The manganese of 1.7wt%, and its carbon equivalent is 4.1～4.4%, the content of copper is less than 0.5wt%, and the content of phosphorus is less than 0.05wt%, sulfur
Content is less than 0.03wt%, does not contains lead and aluminum.
The preparation method of low temperature resistant high-nickel austenite nodular cast iron the most according to claim 2, it is characterised in that: described chromium
Ferrum is high carbon ferro-chrome, and wherein the mass fraction of chromium is 61%～65%.
The preparation method of low temperature resistant high-nickel austenite nodular cast iron the most according to claim 2, it is characterised in that: described height
The pure pig iron is low-sulfur high-purity pig iron, wherein content≤the 0.03wt% of sulfur.
The preparation method of low temperature resistant high-nickel austenite nodular cast iron the most according to claim 2, it is characterised in that: described manganese
Ferrum is high carbon ferromanganese.
The preparation method of low temperature resistant high-nickel austenite nodular cast iron the most according to claim 2, it is characterised in that: described list
Matter nickel is electrolytic nickel.
The preparation method of low temperature resistant high-nickel austenite nodular cast iron the most according to claim 2, it is characterised in that: described step
Suddenly (3) include procedure below:
1) use and pour method and carry out spheroidising, first nodulizer is added the side in magnesium iron bag, thereafter by the first inovulant
Uniform fold is on nodulizer；
2) the second molten iron is continuously heating to molten iron discharging when 1520 DEG C ~ 1570 DEG C, makes molten iron go out in the side not adding nodulizer
Water, complete to nodularization；
3) removed step 2) after the scum silica frost on molten iron surface, be added thereto to the second inovulant, i.e. obtain after having reacted
3rd molten iron.
The preparation method of low temperature resistant high-nickel austenite nodular cast iron the most according to claim 7, it is characterised in that: described ball
Agent be Mg content be the nickel magnesium alloy of 15 ~ 30wt%, its consumption is the 1% ~ 2% of described second molten iron gross mass.
The preparation method of low temperature resistant high-nickel austenite nodular cast iron the most according to claim 7, it is characterised in that: described
One inovulant is 75% ferrosilicon, and its consumption is the 1% ~ 2% of described second molten iron gross mass, and described second inovulant is 75% ferrosilicon,
Its consumption is the 1/3 ~ 1/2 of the first inovulant.
The preparation method of low temperature resistant high-nickel austenite nodular cast iron the most according to claim 2, it is characterised in that: described
Described in step (4), the temperature of cast is 1520 DEG C～1450 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610542774.6A CN106048396B (en) | 2016-07-12 | 2016-07-12 | A kind of low temperature resistant high-nickel austenite nodular cast iron and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610542774.6A CN106048396B (en) | 2016-07-12 | 2016-07-12 | A kind of low temperature resistant high-nickel austenite nodular cast iron and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106048396A true CN106048396A (en) | 2016-10-26 |
| CN106048396B CN106048396B (en) | 2018-05-22 |
Family
ID=57185221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610542774.6A Active CN106048396B (en) | 2016-07-12 | 2016-07-12 | A kind of low temperature resistant high-nickel austenite nodular cast iron and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106048396B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699433A (en) * | 2021-09-07 | 2021-11-26 | 鹰普机械（宜兴）有限公司 | High-performance high-nickel austenitic ductile iron |
| TWI764846B (en) * | 2021-10-26 | 2022-05-11 | 中國鋼鐵股份有限公司 | High-carbon steel material containing chromium and method for producing the same |
| CN114804671A (en) * | 2022-04-28 | 2022-07-29 | 中国恩菲工程技术有限公司 | Method for preparing nodular cast iron grinding ball from iron-rich nickel slag and preparing cementing material in cooperation with nodular cast iron grinding ball |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1826421A (en) * | 2003-07-18 | 2006-08-30 | 日立金属株式会社 | Austenite heat-resistant spheroidal graphite cast iron |
| CN1927505A (en) * | 2006-09-26 | 2007-03-14 | 西峡县西泵特种铸造有限公司 | High nickel austenite spheroidal graphite cast iron automobile exhaust branch pipe and casting method |
-
2016
- 2016-07-12 CN CN201610542774.6A patent/CN106048396B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1826421A (en) * | 2003-07-18 | 2006-08-30 | 日立金属株式会社 | Austenite heat-resistant spheroidal graphite cast iron |
| CN1927505A (en) * | 2006-09-26 | 2007-03-14 | 西峡县西泵特种铸造有限公司 | High nickel austenite spheroidal graphite cast iron automobile exhaust branch pipe and casting method |
Non-Patent Citations (4)
| Title |
|---|
| 田长浒: "《钒钛球墨铸铁》", 31 December 1984 * |
| 程凤军 等: ""球墨铸铁中碎块状石墨的形成原因及防止措施"", 《现代铸铁》 * |
| 程武超 等: ""高镍奥氏体球墨铸铁饱和度和碳当量的验证"", 《铸造技术》 * |
| 赵新武: ""高镍D5B奥氏体球铁排气管的生产工艺"", 《铸造技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699433A (en) * | 2021-09-07 | 2021-11-26 | 鹰普机械（宜兴）有限公司 | High-performance high-nickel austenitic ductile iron |
| TWI764846B (en) * | 2021-10-26 | 2022-05-11 | 中國鋼鐵股份有限公司 | High-carbon steel material containing chromium and method for producing the same |
| CN114804671A (en) * | 2022-04-28 | 2022-07-29 | 中国恩菲工程技术有限公司 | Method for preparing nodular cast iron grinding ball from iron-rich nickel slag and preparing cementing material in cooperation with nodular cast iron grinding ball |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106048396B (en) | 2018-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1923412B (en) | High nickel austenite spheroidal graphite cast-iron gas exhaust branch pipe casting technique | |
| CN105401066B (en) | Low tin silicon molybdenum vermicular cast iron and preparation method thereof | |
| CN107354370B (en) | A kind of casting ferrite with nodular cast iron and preparation method thereof | |
| CN106811676A (en) | A kind of high-intensity high-tenacity as cast condition QT700 10 and its production method | |
| CN102230140B (en) | Martensitic wear resistant steel production technology | |
| CN102851575B (en) | Oxidation-resistant alloying grey cast iron and preparation method thereof | |
| CN102851574B (en) | Heatproof alloy vermicular cast iron and method for preparing same | |
| CN107043841B (en) | A kind of spheroidization and inoculation treatment process of spheroidal graphite cast-iron | |
| CN106048396B (en) | A kind of low temperature resistant high-nickel austenite nodular cast iron and preparation method thereof | |
| CN102071351A (en) | Vermicularizing treatment process of vanadium-titanium vermicular graphite cast iron | |
| CN108754297A (en) | A kind of vermicular cast iron of seawater corrosion resistance and preparation method thereof | |
| CN104480377B (en) | Vermicular graphite cast iron single cylinder diesel engine body with high vermicular graphite rate and preparation method thereof | |
| CN110029266A (en) | A kind of cast iron silicon-zirconium-manganese-chromium inovulant and preparation method thereof | |
| CN103572178A (en) | High-temperature-resistant steel and production method thereof | |
| CN103131942A (en) | Vermicular graphite cast iron with high percent of vermiculation of combustion motor cylinder body and cylinder cover and preparation method | |
| CN107354369B (en) | A kind of spheroidal graphite cast-iron containing molybdenum and preparation method thereof used under 500 DEG C of high temperature | |
| WO2018166247A1 (en) | Development method for high-strength and high-toughness nodular cast iron for wind electricity | |
| CN108866427A (en) | The manufacturing method of large section low-temperature high-toughness Ferrite nodular iron casting | |
| RU2395366C1 (en) | Procedure for production of casts out of alloyed iron | |
| CN109930059A (en) | Low-temperature high-strength high-ductility spheroidal graphite cast-iron and preparation method thereof and railway locomotive components | |
| CN103451512A (en) | Method of obtaining as-cast pearlitic ductile iron by adding alloy elements | |
| CN114411049B (en) | Low-cost and high-strength ferritic nodular cast iron and preparation method and application thereof | |
| Labrecque et al. | Optimizing the mechanical properties of thin-wall ductile iron castings | |
| CN110423937A (en) | The alloying gray cast iron and its smelting technology of a kind of high temperature resistant aluminium, liquid zinc corrosion | |
| Darmawan et al. | Effect of magnesium on the strength, stiffness and toughness of nodular cast iron |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Zhenbo Inventor after: Li Qiang Inventor after: Li Rongfei Inventor after: Ye Yongping Inventor after: Li Peng Inventor after: He Wei Inventor after: Hu Xiaohong Inventor before: Li Zhenbo Inventor before: Liu Rui Inventor before: Li Rongfei Inventor before: Ye Yongping Inventor before: Li Peng Inventor before: He Wei Inventor before: Hu Xiaohong |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 610000 No. 3 Century Avenue, Chengdu Economic and Technological Development Zone, Sichuan Province Patentee after: China Petroleum Group, Chengdu Compressor Co., Ltd. Address before: 610000 No. 3 Century Avenue, Chengdu Economic and Technological Development Zone, Sichuan Province Patentee before: Chengdu Compressor Factory of CNPC Jichai Power General Factory |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201015 Address after: 100032 Liupuwei, Xicheng District, Beijing Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC JICHAI POWER Co.,Ltd. Address before: 610000 No. 3 Century Avenue, Chengdu economic and Technological Development Zone, Sichuan, China Patentee before: CNPC JICHAI POWER COMPANY LIMITED CHENGDU COMPRESSOR BRANCH |
|
| TR01 | Transfer of patent right |