CN108796354A - The manufacture formula and technique of pressure distributor - Google Patents
The manufacture formula and technique of pressure distributor Download PDFInfo
- Publication number
- CN108796354A CN108796354A CN201810718960.XA CN201810718960A CN108796354A CN 108796354 A CN108796354 A CN 108796354A CN 201810718960 A CN201810718960 A CN 201810718960A CN 108796354 A CN108796354 A CN 108796354A
- Authority
- CN
- China
- Prior art keywords
- molten iron
- iron
- pressure distributor
- stoste
- inoculation
- 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.)
- Pending
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
- C22C37/10—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
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
-
- 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
- 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
Abstract
The manufacture formula and technique of a kind of pressure distributor disclosed in this invention, including the following ingredients that form by mass percentage：C：3.7-3.9%；Si：1.8-2.0%；Mn：0.7-0.9%；P：≤ 0.05%；S：≤ 0.06%；Cr：0.08%；Mo:0.35%；Cu:0.6-0.8%；Re：0.02%；Mg:0.35%；V:0.30%；Ni：0.12-0.14%；Lanthanide rare：0.02-0.5%；Surplus is iron.Then successively through cast iron melting, spheroidising, when secondary Instantaneous inoculants, directly pours into a mould, and finally skims, then cover one layer of deslagging agent and carry out poly- slag, heat preservation, soaking time is unpacked after 6 hours.Using compound instant inoculation technique inoculation, the quantity of raising graphite nodule, carbide≤3% strengthened matrix, promote matrix；To improve casting matrix consistency, eliminate shrinkage cavity shrinkage porosity, raising intensity, hardness, wearability, the service life for making casting qualified rate be increased to 98 or more and product；And economize on coal economize on electricity consumption reduction, production cost reduce, and the finished product efficiency of production is higher.
Description
Technical field
The present invention relates to the technical field that pressure distributor makes, the manufacture formulas and work of especially a kind of pressure distributor
Skill.
Background technology
In the prior art, pressure distributor is one of key fitment in Chinese molding machine, again will be all made of when being cast
It will directly be poured into a mould in molten iron stoste injection sandbox after carrying out a spheroidising after molten iron stoste melting, after casting complete
Carry out normalizing, tempering and Tempering and Quenching successively, a normalizing and double tempering used in Tempering and Quenching, then again into
Row cooling, to finally obtain the product of distributor；Since its heat treatment needs a large amount of electricity and coal to carry out for a long time
Processing, so that the comparable height of production cost, and a large amount of uses of coal so that supplier can largely mine coal, and lead
Land resource type and the deterioration of the ecological environment are caused, groundwater resources are destroyed, the water supply for aggravating water-deficient area is nervous；Exhaust gas is caused to be arranged
It puts, endangers atmospheric environment, forest spontaneous combustion probability is significantly increased, the effect of the trees that jeopardize forests greening；Especially in
State leads to the long range transporting coal lattice of " transporting the coal in the North to the South, Xi Meidong is defeated " due to huge spatial diversity between coal production and consumption
Office, the coal dust generated in transport are flown upward, and have not only lost the ecological environment around along a large amount of coal, but also pollution；Formed with acid rain,
Sulfur dioxide and the air pollution due to coal combustion that flue dust is main harm；And it uses at above-mentioned moulding process and existing needs heat
Under the finished product rate of the formula manufacture of reason is at a fairly low, and mechanical equipment is not achieved in its tensile strength, elongation percentage and hardness
In best requirement, to affect the service life and performance of product.
Invention content
The one kind designed the purpose of the present invention is to solve the deficiency of above-mentioned technology economize on coal economize on electricity consumption reduction, production cost
Reduce, manufacture the manufacture formula and technique of the pressure distributor of no pollution.
A kind of manufacture formula of pressure distributor designed by the present invention, including form by mass percentage it is following at
Point：C：3.7-3.9%；Si：1.8-2.0%；Mn：0.7-0.9%；P：≤ 0.05%；S：≤ 0.06%；Cr：0.08%；Mo:
0.35%；Cu:0.6-0.8%；Re：0.02%；Mg:0.35%；V:0.30%；Ni：0.12-0.14%；Lanthanide rare：
0.02-0.5%；Surplus is iron.
Further preferably, lanthanide rare constituent mass percentage chemical composition is：Cerium：21-23%, praseodymium：7-9%, neodymium：
18-20%, dysprosium：13-15%, remaining is lanthanum：7-9%, the sum of above lanthanide rare each component are 100%.
A kind of manufacturing process of pressure distributor includes that distribution is formed using the manufacture formula of above-mentioned pressure distributor
Device is as follows：
Selected V, Zr, Si, Mn, P, S, Cr, Mo, Cu and iron are added in medium-frequency induction furnace and heat by A, cast iron melting
Melting, which is carried out, to 1500 DEG C -1560 DEG C obtains molten iron stoste；
B, spheroidising is placed in closed nodularization of the nodularization temperature at 1480 DEG C -1520 DEG C after molten iron stoste is come out of the stove
In stove, then the lanthanide rare nodulizer of compound completion is covered in molten iron stoste, melted with molten iron punching and stands 5-8 minutes,
To carry out rotten and inoculation to molten iron stoste；
C, secondary Instantaneous inoculants are pouring into a mould the molten iron stoste of about 30-40 after the spheroidising of bottom in balling furnace
When with flowing in casting ladle during pour inovulant and carry out inoculation, poured in 30 seconds from the timing of inoculation start to process
Note is completed, and temperature when cast is maintained at 1410 DEG C -1380 DEG C；
D, it finally skims, then covers one layer of deslagging agent and carry out poly- slag, heat preservation, soaking time is unpacked after 6 hours.
Further preferably, including using the physics type of cooling casting cooling velocity is controlled, specific method is using in sandbox
Interior setting chill carries out physics cooling.
Further preferably, inovulant is compounded to form using C, Re, Mg.
Further preferably, instantaneous treated that molten iron measures its chemical element using casting direct-reading spectrometer contains through secondary
Amount, qualified molten iron are then poured by constant temperature casting device in the cavity of sandbox.
The manufacture formula and technique of pressure distributor designed by the present invention, using compound instant inoculation technique womb
Reason, the quantity for improving graphite nodule, carbide≤3% strengthened matrix, promote matrix；To improve casting matrix group
Consistency is knitted, shrinkage cavity shrinkage porosity is eliminated, improves intensity, hardness, wearability, casting qualified rate made to be increased to 98 or more and product
Service life；And economize on coal economize on electricity consumption reduction, production cost reduce, and the finished product efficiency of production is higher.
Specific implementation mode
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
The every other embodiment that art personnel are obtained, shall fall within the protection scope of the present invention.
Embodiment 1：
A kind of the manufacture formula and technique of pressure distributor, are formed the specific of distributor described in the present embodiment
Steps are as follows：
A, cast iron melting selects V：0.30%, Ni：0.12%, Si：1.8%, Mn：0.7%, P：0.05%, S：
0.06%,；Cr：0.08%；Mo:0.35%；Cu:0.6% and iron be added in medium-frequency induction furnace and be heated to 1500 DEG C and melted
Refining obtains molten iron stoste；
B, spheroidising is placed in nodularization temperature in 1480 DEG C of closed balling furnace, so after molten iron stoste is come out of the stove
The lanthanide rare nodulizer of compound completion is covered in molten iron stoste afterwards, melted with molten iron punching and stands 5 minutes, with to molten iron original
Liquid carries out rotten and inoculation；
C, secondary Instantaneous inoculants, by after the spheroidising of bottom in balling furnace about 30 molten iron stoste cast when with
Inovulant is poured during flowing in casting ladle and carries out inoculation, is being poured in 30 seconds from the timing of inoculation start to process
Temperature when at, cast is maintained at 1410 DEG C；
D, it finally skims, then covers one layer of deslagging agent and carry out poly- slag, heat preservation, soaking time is unpacked after 6 hours.
In the present embodiment, including using physics type of cooling control casting cooling velocity, specific method is using in sandbox
Interior setting chill carries out physics cooling.
In the present embodiment, inovulant uses C：3.7%, Re：0.02%；Mg:0.35% is compounded to form.
In the present embodiment, instantaneous treated that molten iron measures its chemical element using casting direct-reading spectrometer contains through secondary
Amount, qualified molten iron are then poured by constant temperature casting device in the cavity of sandbox.
In the present embodiment, lanthanide rare constituent mass percentage chemical composition is：Cerium：21%, praseodymium：7%, neodymium：18%,
Dysprosium：13%, remaining is lanthanum：7%, the sum of above lanthanide rare each component is 100%.
The product performance index comparison being manufactured through above-mentioned Recipe is as follows：
The newly developed process ruggedness of testing inspection and hardness surmount prior art processes by contrast, are subtracting heat treatment work
In the case of sequence, reach the technique effect of economize on electricity consumption reduction of economizing on coal, production cost reduction, no pollution.
Embodiment 2：
A kind of the manufacture formula and technique of pressure distributor described in the present embodiment, processing step and formula and implementation
Example 1 is roughly the same, but is not both：It is formed distributor and is as follows：
A, cast iron melting selects V：0.30%, Ni：0.13%, Si：1.9%, Mn：0.8%, P：0.03%, S：
0.04%,；Cr：0.08%；Mo:0.35%；Cu:0.7% and iron be added in medium-frequency induction furnace and be heated to 1540 DEG C and melted
Refining obtains molten iron stoste；
B, spheroidising is placed in nodularization temperature in 1500 DEG C of closed balling furnace, so after molten iron stoste is come out of the stove
The lanthanide rare nodulizer of compound completion is covered in molten iron stoste afterwards, melted with molten iron punching and stands 7 minutes, with to molten iron original
Liquid carries out rotten and inoculation；
C, secondary Instantaneous inoculants, by after the spheroidising of bottom in balling furnace about 35 molten iron stoste cast when with
Inovulant is poured during flowing in casting ladle and carries out inoculation, is being poured in 30 seconds from the timing of inoculation start to process
Temperature when at, cast is maintained at 1400 DEG C；
D, it finally skims, then covers one layer of deslagging agent and carry out poly- slag, heat preservation, soaking time is unpacked after 6 hours.
In the present embodiment, inovulant uses C：3.8%, Re：0.02%；Mg:0.35% is compounded to form.
Lanthanide rare constituent mass percentage chemical composition is：Cerium：23%, praseodymium：9%, neodymium：20%, dysprosium：15%, remaining
For lanthanum：9%, the sum of above lanthanide rare each component is 100%.
The product performance index comparison being manufactured through above-mentioned Recipe is as follows：
The newly developed process ruggedness of testing inspection and hardness surmount prior art processes by contrast, are subtracting heat treatment work
In the case of sequence, reach the technique effect of economize on electricity consumption reduction of economizing on coal, production cost reduction, no pollution.
Embodiment 3：
A kind of the manufacture formula and technique of pressure distributor described in the present embodiment, processing step and formula and implementation
Example 1 and embodiment 2 are roughly the same, but are not both：It is formed distributor and is as follows：
A, cast iron melting selects V：0.30%, Ni：0.14%, Si：2.0%, Mn：0.9%, P：0.01%, S：
0.02%,；Cr：0.08%；Mo:0.35%；Cu:0.8% and iron be added in medium-frequency induction furnace and be heated to 1560 DEG C and melted
Refining obtains molten iron stoste；
B, spheroidising is placed in nodularization temperature in 1520 DEG C of closed balling furnace, so after molten iron stoste is come out of the stove
The lanthanide rare nodulizer of compound completion is covered in molten iron stoste afterwards, melted with molten iron punching and stands 8 minutes, with to molten iron original
Liquid carries out rotten and inoculation；
C, secondary Instantaneous inoculants, by after the spheroidising of bottom in balling furnace about 30 molten iron stoste cast when with
Inovulant is poured during flowing in casting ladle and carries out inoculation, is being poured in 30 seconds from the timing of inoculation start to process
Temperature when at, cast is maintained at 1380 DEG C；
D, it finally skims, then covers one layer of deslagging agent and carry out poly- slag, heat preservation, soaking time is unpacked after 6 hours.
In the present embodiment, inovulant uses C：3.9%, Re：0.02%；Mg:0.35% is compounded to form.
In the present embodiment, lanthanide rare constituent mass percentage chemical composition is：Cerium：22%, praseodymium：8%, neodymium：19%,
Dysprosium：14%, remaining is lanthanum：8%, the sum of above lanthanide rare each component is 100%.
The product performance index comparison being manufactured through above-mentioned Recipe is as follows：
The newly developed process ruggedness of testing inspection and hardness surmount prior art processes by contrast, are subtracting heat treatment work
In the case of sequence, reach the technique effect of economize on electricity consumption reduction of economizing on coal, production cost reduction, no pollution.
In summary three embodiments obtain, obtain the pure iron liquid of high temperature using the method for double melting, improve former iron
Liquid phosphorus content reduces silicone content, ensures enough pregnant amounts, can stabilize and increase nodularization effect, obtain enough and smaller
The technique effect of graphite nodule.
In addition, carbon promotes graphitization, chilling tendency is reduced.Phosphorus content influences nodularization effect, phosphorus content to a certain extent
Height, graphite is more, improves magnesium absorption rate, is conducive to spheroidization of graphite, and graphite nodule is small and rounding.Meanwhile carbon improves iron liquid flowing
Property, increase volume expansion, reduces Shrinkage Porosity defect.Influence of the carbon to spheroidal graphite cast-iron mechanical property is mainly by it to metal
The influence of matrix is worked.For cast condition ductile iron, the mass fraction of carbon, when more than 3.0%, increasing phosphorus content can increase
Add ferrite, improves elongation after fracture, but hardness and tensile strength decline in succession.From magnesium spheroidal graphite cast-iron phosphorus content, residual magnesium content
With the relationship map analysis of graphite shape, as cast condition magnesium spheroidal graphite cast-iron should select relatively high carbon amounts, in order to ensure sufficient amount of stone
Tampon, and smaller graphite nodule is obtained, phosphorus content is typically chosen in 3.7%~3.9% range, and the residual magnesium content needed is stablized
0 35%, it can either ensure nodularization, and good casting character and mechanical property can be obtained.
Silicon is the element for strongly facilitating graphitization and cementite decomposition.Silicon can refine graphite, be conducive to spheroidization of graphite, simultaneously
Obtain tiny round and smooth graphite nodule.This effect of silicon is the most apparent to breed silicon.Silicon increases, and volume expansion increases, and reduces contracting
Pine improves mobility.But so that pearlite and ferritic ratio is changed due to the effect of silicon in spheroidal graphite cast-iron, increase silicon
Ferritic quantity can be increased, thus reduce intensity, hardness, improve plasticity.The selection of silicon content should be to ensure enough resist
It is principle that tensile strength obtains higher elongation after fracture again simultaneously, should ensure that matrix has enough pearlite, while again
Ensure with the presence of a certain amount of ferrite matrix.Therefore, silicon content is typically chosen mass fraction 1.8%~2.0%.
Manganese is the element for stablizing and refining pearlite.A certain amount of manganese is added in pearlite ductile iron can eliminate iron
Ferritic especially eliminates " buphthalmos " columnar ferrite tissue.With the increase of manganese content,>When 0.6%, has to intensity and significantly carry
Height, general control is within 0.7-0.9%, to obtain higher tensile strength, it is necessary to and guarantee has enough content of pearlite in alloy,
In this case, accurately and reliably method is exactly to add alloy element copper.
Chromium increases the quenching degree of steel, significantly improves intensity, hardness and wearability, also increases the corrosion resistance of steel and anti-oxidant
Ability.
Control sulphur is the key that stablize nodularization, improve quality.Sulphur can be increased in Cast Iron in Cupola, according to melting condition
Difference increases sulphur ratio generally in≤0.06% range.Therefore, other than the raw material sulfur content such as control coke, metal charge,
The original iron melt of cupola melting to take in stove or external desulfurzation measure.
Magnesium plays main spheroidizing, contains certain residual magnesium amount in iron liquid, just can guarantee that nodularization is good and inhibits ball
Change decline.It should generally control in 0.35% range.
Copper can refine graphite nodule, increase the number of graphite, stablize, refinement pearlite, reduce or ferrite is inhibited to be formed.
As copper content increases, intensity can be significantly improved, it is in a slight decrease to elongation after fracture.The mass fraction selection of copper is generally
0.6%-0.8% is advisable, and controls standard 0.7%.
Since Cr, V is added in above-mentioned formula and technique, N i make so as to improve the atom active of C and N element
The air mass that each atom is formed can form strong interaction with dislocation, and pinning dislocation generates yield point elongation, and generates preferable
Yield strength.
Rare earth, since the metallic atomic radius of the above rare earth element is big and rare earth has higher activity, it is easy to fill up
The gap of storeroom, meanwhile, rare earth element is easily and the element compounds such as oxygen, sulphur generate the high compound of fusing point, and compound rare-earth adds
The dispersibility and compatibility for entering to improve material to a certain extent make material be uniformly mixed and also improve the fire-retardant of enhancement layer
Property.
The present invention is not limited to above-mentioned preferred forms, anyone can show that other are various under the inspiration of the present invention
The product of form, however, make any variation in its technique, it is every that there is technical solution identical or similar to the present application,
It is within the scope of the present invention.
Claims (6)
1. a kind of manufacture formula of pressure distributor, which is characterized in that including the following ingredients formed by mass percentage：C：
3.7-3.9%；S i：1.8-2.0%；Mn：0.7-0.9%；P：≤ 0.05%；S：≤ 0.06%；Cr：0.08%；Mo:
0.35%；Cu:0.6-0.8%；Re：0.02%；Mg:0.35%；V:0.30%；N i：0.12-0.14%；Lanthanide rare：
0.02-0.5%；Surplus is iron.
2. the manufacture formula of pressure distributor according to claim 1, which is characterized in that lanthanide rare constituent mass percentage
It is than chemical composition：Cerium：21-23%, praseodymium：7-9%, neodymium：18-20%, dysprosium：13-15%, remaining is lanthanum：7-9%, the above lanthanum
Be the sum of rare earth each component be 100%.
3. a kind of manufacturing process of pressure distributor, which is characterized in that include being matched using the hydraulic separate described in claim 1 and 2
The manufacture formula of device is formed distributor and is as follows：
Selected V, Zr, S i, Mn, P, S, Cr, Mo, Cu and iron are added in medium-frequency induction furnace and are heated to by A, cast iron melting
1500 DEG C -1560 DEG C carry out melting and obtain molten iron stoste；
B, spheroidising is placed in nodularization temperature in 1480 DEG C -1520 DEG C of closed balling furnace after molten iron stoste is come out of the stove,
Then the lanthanide rare nodulizer of compound completion is covered in molten iron stoste, is melted with molten iron punching and stands 5-8 minutes, with to iron
Water stoste carries out rotten and inoculation；
C, secondary Instantaneous inoculants, by the molten iron stoste of about 30-40 after the spheroidising of bottom in balling furnace cast when with
Inovulant is poured during flowing in casting ladle and carries out inoculation, is being poured in 30 seconds from the timing of inoculation start to process
Temperature when at, cast is maintained at 1410 DEG C -1380 DEG C；
D, it finally skims, then covers one layer of deslagging agent and carry out poly- slag, heat preservation, soaking time is unpacked after 6 hours.
4. a kind of manufacturing process of pressure distributor according to claim 3, which is characterized in that including being cooled down using physics
Mode controls casting cooling velocity, and specific method is using the setting chill progress physics cooling in sandbox.
5. a kind of manufacturing process of pressure distributor according to claim 3, which is characterized in that inovulant using C, Re,
Mg is compounded to form.
6. a kind of manufacturing process of pressure distributor according to claim 3, which is characterized in that after secondary instantaneous processing
Molten iron using casting direct-reading spectrometer measure its chemical element content, qualified molten iron is then poured into sand by constant temperature casting device
In the cavity of case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810718960.XA CN108796354A (en) | 2018-07-03 | 2018-07-03 | The manufacture formula and technique of pressure distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810718960.XA CN108796354A (en) | 2018-07-03 | 2018-07-03 | The manufacture formula and technique of pressure distributor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108796354A true CN108796354A (en) | 2018-11-13 |
Family
ID=64073409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810718960.XA Pending CN108796354A (en) | 2018-07-03 | 2018-07-03 | The manufacture formula and technique of pressure distributor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108796354A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63118048A (en) * | 1986-11-07 | 1988-05-23 | Mazda Motor Corp | Sliding member made of cast iron and its manufacture |
| CN102071352A (en) * | 2011-01-17 | 2011-05-25 | 重庆大学 | Vanadium-titanium vermicular cast iron brake drum and preparation method thereof |
| CN105274423A (en) * | 2014-06-13 | 2016-01-27 | 中国科学院金属研究所 | Carbide-containing austempered ductile iron and preparation method thereof |
| US9580777B1 (en) * | 2016-02-08 | 2017-02-28 | Roman Radon | Hypereutectic white iron alloys comprising chromium, boron and nitrogen and articles made therefrom |
-
2018
- 2018-07-03 CN CN201810718960.XA patent/CN108796354A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63118048A (en) * | 1986-11-07 | 1988-05-23 | Mazda Motor Corp | Sliding member made of cast iron and its manufacture |
| CN102071352A (en) * | 2011-01-17 | 2011-05-25 | 重庆大学 | Vanadium-titanium vermicular cast iron brake drum and preparation method thereof |
| CN105274423A (en) * | 2014-06-13 | 2016-01-27 | 中国科学院金属研究所 | Carbide-containing austempered ductile iron and preparation method thereof |
| US9580777B1 (en) * | 2016-02-08 | 2017-02-28 | Roman Radon | Hypereutectic white iron alloys comprising chromium, boron and nitrogen and articles made therefrom |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106191640B (en) | A kind of ductile cast iron material and preparation method thereof | |
| CN104120332B (en) | High-intensity high-tenacity spheroidal graphite cast-iron 600-10 and production technology thereof | |
| CN108624806B (en) | A kind of preparation method of the spheroidal graphite cast-iron of high-intensity and high-tenacity | |
| CN103757172A (en) | Method for preparing nodular cast iron | |
| CN105886883B (en) | Inovulant and preparation method thereof and the application in spheroidal graphite cast-iron | |
| CN101876026A (en) | ADI (Austempered Ductile Iron) piece with high toughness and high strength and manufacturing method thereof | |
| CN103484753A (en) | Novel as-cast 500-7 nodular cast iron | |
| CN103952622B (en) | A kind of vanadium titanium ferrite ductile cast iron automotive hub and production technology thereof | |
| CN104004960B (en) | A kind of low chromium vanadium titanium cast iron abrading-ball and preparation method thereof | |
| CN105441782A (en) | Ductile iron casting and manufacturing method thereof | |
| CN105420592A (en) | Low-temperature-resistant nodular iron casting and preparation method thereof | |
| CN110295312A (en) | A kind of low-temperature ball spheroidal graphite cast iron and its production technology and application | |
| CN109811247A (en) | A kind of cast iron bismuth-containing inovulant and preparation method thereof | |
| CN102400032B (en) | Large-cross-section nodular cast iron | |
| CN106367672A (en) | Nodular cast iron and processing technology thereof | |
| CN101265546B (en) | Method for producing spheroidal graphite cast iron from waste steel | |
| CN102115801B (en) | Method for producing high-quality spheroidal graphite cast iron and spheroidal graphite cast iron prepared thereby | |
| CN105838987A (en) | Preparing method for high-tenacity low-alloy wear-resistant steel for bucket tooth | |
| CN105803300B (en) | Preparation method of CADI nodular cast iron capable of resisting low-temperature impact at-40 DEG C | |
| CN109097670B (en) | A kind of spheroidal graphite cast-iron of high-intensity and high-tenacity | |
| CN103589941B (en) | Method for preparing vermicular graphite cast iron by molten iron spheroidization | |
| CN108203786A (en) | A kind of silicon solid solution high intensity plasticity ferrite ductile cast iron, manufacturing method and railway locomotive parts | |
| CN107287498A (en) | Ferrite nodular cast iron and its gravity foundry technology | |
| CN111455263A (en) | Environment-friendly low-temperature nodular cast iron produced by using low-rare earth alloy and production process thereof | |
| CN109811108A (en) | A kind of inovulant and preparation method thereof containing light rare earth metal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181113 |
|
| RJ01 | Rejection of invention patent application after publication |