CN113136473A - Preparation method of novel low-silicon low-magnesium nodulizer - Google Patents
Preparation method of novel low-silicon low-magnesium nodulizer Download PDFInfo
- Publication number
- CN113136473A CN113136473A CN202110353470.6A CN202110353470A CN113136473A CN 113136473 A CN113136473 A CN 113136473A CN 202110353470 A CN202110353470 A CN 202110353470A CN 113136473 A CN113136473 A CN 113136473A
- Authority
- CN
- China
- Prior art keywords
- magnesium
- parts
- iron
- low
- iron alloy
- 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
- 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
- C21C1/105—Nodularising additive agents
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention discloses a preparation method of a novel low-silicon low-magnesium nodulizer, belonging to the field of casting, wherein the low-silicon low-magnesium nodulizer is prepared from the following components in parts by mass: 80-90 parts of pig iron, 1-2 parts of zirconia, 3-6 parts of aluminum-iron alloy, 3-6 parts of calcium-iron alloy, 1-2 parts of magnesium-iron alloy and 2-3 parts of composite modifier; when the zirconium oxide and the molten iron are mixed, a novel low-silicon low-magnesium nodulizer is formed by a high-melting-point compound, the structure and the performance of the iron casting are changed, a fibrous high-melting-point region is formed in the structure of the iron casting, and the precipitation of graphite of the iron casting can be promoted.
Description
Technical Field
The invention belongs to the field of casting, and particularly relates to a preparation method of a novel low-silicon low-magnesium nodulizer.
Background
It is generally known that in the casting field, the nodulizer commonly used by those skilled in the art is a rare earth magnesium nodulizer, and since calcium-magnesium alloys are generally used in the nodulizer, wherein the content of calcium is stable, but the fluctuation of the content of magnesium is large, the addition amount of the specific nodulizer is generally defined according to different magnesium contents, the white cast tendency of the calcium-magnesium alloys is small, but the treatment conditions in the treatment process are severe, such as the temperature requirement of the treatment conditions is high, and the slag amount downstream of the treatment is large. Later technicians in this field have tried to use pure magnesium alloys, where the magnesium content absorption is high, but the application is not widespread in view of high safety factor, more severe processing conditions and production costs.
In addition, too high content of magnesium oxide in the nodulizer also affects the nodulizer, affects the components of the nodulizer, causes unstable components of the nodulizer, and also has too high content of magnesium oxide, so that the nodulizer is poor in treatment and large in addition amount, and causes the problems of fast decline after the nodulizing treatment, large chilling tendency and the like. Therefore, it is a challenge for those skilled in the art to develop a novel low magnesium nodulizer.
Disclosure of Invention
The invention discloses a novel low-silicon low-magnesium nodulizer and a preparation method thereof, aiming at the problems in the prior art, the components of the nodulizer are zirconium oxide and a high-melting-point compound formed by molten iron, and the mixture of a light rare earth composite modifier and a heavy rare earth composite modifier is adopted to replace magnesium element to improve the impact toughness of an iron casting in the nodulizer.
The invention is realized by the following steps:
the preparation method of the novel low-silicon low-magnesium nodulizer is characterized in that the low-silicon low-magnesium nodulizer is prepared from the following components in parts by mass: 80-90 parts of pig iron, 1-2 parts of zirconia, 3-6 parts of aluminum-iron alloy, 3-6 parts of calcium-iron alloy, 1-2 parts of magnesium-iron alloy and 2-3 parts of composite modifier, wherein the composite modifier is a mixture of light rare earth composite modifier and heavy rare earth composite modifier; the preparation method specifically comprises the following steps:
placing 80-90 parts of pig iron and 1-2 parts of zirconia into a medium-frequency induction furnace, setting the temperature of the medium-frequency induction furnace at 1450-1500 ℃, continuing stirring for 4-5 hours until the pig iron and the zirconia are in a molten mixed state, cooling to 900-1000 ℃ after uniformly stirring, and preserving heat for later use;
step two, preparing a magnesium-iron alloy, weighing magnesium powder and iron powder, placing the magnesium powder and the iron powder in absolute ethyl alcohol, uniformly stirring by ultrasonic waves or uniformly stirring at a high speed, uniformly calcining at a high temperature, and cooling after calcining at the high temperature to form a magnesium-iron alloy ingot;
step three, mixing the magnesium-iron alloy ingot obtained in the step two, 3-6 parts of aluminum-iron alloy and 3-6 parts of calcium-iron alloy, extruding the mixture into an ingot, and crushing the ingot into fine blocks to obtain aluminum-calcium-iron intermediate alloy blocks;
and step four, mixing the intermediate alloy block of the aluminum, calcium and iron with 2-3 parts of composite modifier, placing the mixture into the molten mixture obtained in the step one after uniform mixing, continuously heating the intermediate frequency induction furnace to 1450-1500 ℃, uniformly stirring, cooling to room temperature, repeating the process until the temperature is 1450-1500 ℃, cooling again, repeating for three times, finally heating the intermediate frequency induction furnace to 1850-1900 ℃ until the temperature is completely molten, and rapidly cooling in the protective atmosphere of inert gas to obtain the novel low-silicon low-magnesium spheroidizing agent.
Further, the magnesium-iron alloy is prepared from magnesium powder and iron powder, the mass ratio of the magnesium powder to the iron powder is 9:1, and the magnesium powder and the iron powder are both powder metals smaller than 200 meshes.
Further, the high-speed stirring conditions in the second step are as follows: placing the mixture in a high-speed stirrer for stirring for 15 min at the rotating speed of: 1300-1600 r/min; the ultrasonic stirring time is 30 min.
Furthermore, the particle size of the fine blocks in the third step is 30-50 mm.
Further, the mass parts of the aluminum-iron alloy, the calcium-iron alloy and the magnesium-iron alloy are 3:3: 1.
Further, the light rare earth composite alterant contains a cerium rare earth alterant, the heavy rare earth composite alterant contains an yttrium rare earth alterant, and the mass ratio of the light rare earth composite alterant to the heavy rare earth composite alterant is 1: 1.
Further, the inert gas is nitrogen.
The beneficial effects of the invention and the prior art are as follows:
when the zirconium oxide and the molten iron are mixed, a novel low-silicon low-magnesium nodulizer is formed by a high-melting-point compound, the structure and the performance of the iron casting are changed, and a fibrous high-melting-point region is formed in the structure of the iron casting, so that the precipitation of graphite of the iron casting can be promoted;
the aluminum-iron alloy, the calcium-iron alloy and the magnesium-iron alloy are fused with each other to form an aluminum-calcium-iron intermediate alloy substance which can be used as a deoxidizer in the casting process, so that the wear resistance of cast iron is improved;
the cerium-containing rare earth modifier and the yttrium-containing rare earth modifier are mixed, so that the synergistic effect of the light rare earth composite modifier and the heavy rare earth composite modifier can be fully exerted, and the inoculation modification effect of the casting is improved.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention more clear, the present invention is further described in detail by the following examples. It should be noted that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
In the embodiment, the low-silicon low-magnesium nodulizer is prepared from the following components in parts by mass: 82 parts of pig iron, 1 part of zirconia, 6 parts of aluminum-iron alloy, 6 parts of calcium-iron alloy, 2 parts of magnesium-iron alloy and 2 parts of composite modifier, wherein the composite modifier is a mixture of light rare earth composite modifier and heavy rare earth composite modifier; the preparation method specifically comprises the following steps:
placing 82 parts of pig iron and 1 part of zirconia in a medium-frequency induction furnace, setting the temperature of the medium-frequency induction furnace at 1450-1500 ℃ until the pig iron and the zirconia are in a molten mixed state, continuing stirring for 4-5 hours, cooling to 900-1000 ℃ after uniformly stirring, and preserving heat for later use;
step two, preparing a magnesium-iron alloy, weighing magnesium powder and iron powder, placing the magnesium powder and the iron powder in absolute ethyl alcohol, ultrasonically stirring uniformly, calcining at high temperature after uniformity, and cooling after high-temperature calcination to form a magnesium-iron alloy ingot;
step three, mixing 2 parts of magnesium-iron alloy ingot, 6 parts of aluminum-iron alloy and 3-6 parts of calcium-iron alloy (the mass parts of the aluminum-iron alloy, the calcium-iron alloy and the magnesium-iron alloy are 3:3: 1), extruding into ingot, crushing into fine blocks, and obtaining the intermediate alloy block of aluminum, calcium and iron;
and step four, mixing the intermediate alloy block of the aluminum, calcium and iron with 2 parts of the composite modifier, placing the mixture into the molten mixture obtained in the step one after the mixture is uniformly mixed, continuously heating the intermediate frequency induction furnace to 1450-1500 ℃, uniformly stirring, cooling to room temperature, repeating the process until the temperature is 1450-1500 ℃, cooling again, repeating for three times, finally heating the intermediate frequency induction furnace to 1850-1900 ℃ until the temperature is completely molten, and rapidly cooling in the protective atmosphere of nitrogen to obtain the novel low-silicon low-magnesium nodulizer. Specific experimental comparison results are shown in table 1.
Comparative example 1
In the embodiment, the low-silicon low-magnesium nodulizer is prepared from the following components in parts by mass: 82 parts of pig iron, 6 parts of aluminum-iron alloy, 6 parts of calcium-iron alloy, 2 parts of magnesium-iron alloy and 2 parts of composite modifier, wherein the composite modifier is a mixture of light rare earth composite modifier and heavy rare earth composite modifier; the preparation method specifically comprises the following steps:
step one, placing 82 parts of pig iron in a medium-frequency induction furnace, setting the temperature of the medium-frequency induction furnace at 1450-1500 ℃ until the pig iron is in a molten mixed state, continuing stirring for 4-5 hours, cooling to the temperature of 900-1000 ℃ after stirring uniformly, and preserving heat for later use;
step two, preparing a magnesium-iron alloy, weighing magnesium powder and iron powder, placing the magnesium powder and the iron powder in absolute ethyl alcohol, ultrasonically stirring uniformly, calcining at high temperature after uniformity, and cooling after high-temperature calcination to form a magnesium-iron alloy ingot;
step three, mixing 2 parts of magnesium-iron alloy ingot, 6 parts of aluminum-iron alloy and 3-6 parts of calcium-iron alloy (the mass parts of the aluminum-iron alloy, the calcium-iron alloy and the magnesium-iron alloy are 3:3: 1), extruding into ingot, crushing into fine blocks, and obtaining the intermediate alloy block of aluminum, calcium and iron;
and step four, mixing the intermediate alloy block of the aluminum, calcium and iron with 2 parts of the composite modifier, placing the mixture into the molten mixture obtained in the step one after the mixture is uniformly mixed, continuously heating the intermediate frequency induction furnace to 1450-1500 ℃, uniformly stirring, cooling to room temperature, repeating the process until the temperature is 1450-1500 ℃, cooling again, repeating for three times, finally heating the intermediate frequency induction furnace to 1850-1900 ℃ until the temperature is completely molten, and rapidly cooling in the protective atmosphere of nitrogen to obtain the novel low-silicon low-magnesium nodulizer.
The comparative example is different from example 1 in that 1 part of zirconia is not added in the comparative example, and the specific experimental comparison results are shown in table 1.
Example 2
In the embodiment, the low-silicon low-magnesium nodulizer is prepared from the following components in parts by mass: 80 parts of pig iron, 1 part of zirconia, 3 parts of aluminum-iron alloy, 3 parts of calcium-iron alloy, 1 part of magnesium-iron alloy and 2 parts of composite modifier, wherein the composite modifier is a mixture of cerium-containing rare earth modifier and heavy rare earth composite modifier, and the mass part ratio of the light rare earth composite modifier to the heavy rare earth composite modifier is 1: 1; the preparation method specifically comprises the following steps:
placing 80 parts of pig iron and 1 part of zirconia in a medium-frequency induction furnace, setting the temperature of the medium-frequency induction furnace at 1450-1500 ℃ until the pig iron and the zirconia are in a molten mixed state, continuing stirring for 4-5 hours, cooling to 900-1000 ℃ after uniformly stirring, and preserving heat for later use;
step two, preparing a magnesium-iron alloy, weighing magnesium powder and iron powder, placing the magnesium powder and the iron powder in absolute ethyl alcohol, ultrasonically stirring uniformly, calcining at high temperature after uniformity, and cooling after high-temperature calcination to form a magnesium-iron alloy ingot;
step three, mixing 1 part of magnesium-iron alloy ingot, 3 parts of aluminum-iron alloy and 3 parts of calcium-iron alloy (the mass parts of the aluminum-iron alloy, the calcium-iron alloy and the magnesium-iron alloy are 3:3: 1), extruding into an ingot, crushing into fine blocks, and obtaining an aluminum-calcium-iron intermediate alloy block;
and step four, mixing the intermediate alloy block of the aluminum, calcium and iron with 2 parts of the composite modifier, placing the mixture into the molten mixture obtained in the step one after the mixture is uniformly mixed, continuously heating the intermediate frequency induction furnace to 1450-1500 ℃, uniformly stirring, cooling to room temperature, repeating the process until the temperature is 1450-1500 ℃, cooling again, repeating for three times, finally heating the intermediate frequency induction furnace to 1850-1900 ℃ until the temperature is completely molten, and rapidly cooling in the protective atmosphere of nitrogen to obtain the novel low-silicon low-magnesium nodulizer.
Example 3
In the embodiment, the low-silicon low-magnesium nodulizer is prepared from the following components in parts by mass: 90 parts of pig iron, 2 parts of zirconia, 6 parts of aluminum-iron alloy, 6 parts of calcium-iron alloy, 2 parts of magnesium-iron alloy and 3 parts of composite modifier, wherein the composite modifier is a mixture of light rare earth composite modifier and heavy rare earth composite modifier; the preparation method specifically comprises the following steps:
placing 90 parts of pig iron and 2 parts of zirconia in a medium-frequency induction furnace, setting the temperature of the medium-frequency induction furnace at 1450-1500 ℃ until the pig iron and the zirconia are in a molten mixed state, continuing stirring for 4-5 hours, cooling to 900-1000 ℃ after uniformly stirring, and preserving heat for later use;
step two, preparing magnesium-iron alloy, weighing magnesium powder and iron powder, placing the magnesium powder and the iron powder in absolute ethyl alcohol, placing the mixture in a high-speed stirrer, and stirring for 15 min at the rotating speed of: 1300-1600 r/min, uniformly calcining at high temperature, and cooling after high-temperature calcination to form a magnesium-iron alloy ingot;
step three, mixing 6 parts of magnesium-iron alloy ingot, 6 parts of aluminum-iron alloy and 6 parts of calcium-iron alloy (the mass parts of the aluminum-iron alloy, the calcium-iron alloy and the magnesium-iron alloy are 3:3: 1), extruding into an ingot, crushing into fine blocks, and obtaining the intermediate alloy block of aluminum, calcium and iron;
and step four, mixing the intermediate alloy block of the aluminum, calcium and iron with 3 parts of composite modifier, placing the mixture into the molten mixture obtained in the step one after the mixture is uniformly mixed, continuously heating the intermediate frequency induction furnace to 1450-1500 ℃, uniformly stirring, cooling to room temperature, repeating the process until the temperature is 1450-1500 ℃, cooling again, repeating for three times, finally heating the intermediate frequency induction furnace to 1850-1900 ℃ until the temperature is completely molten, and rapidly cooling in the protective atmosphere of nitrogen to obtain the novel low-silicon low-magnesium nodulizer. Specific experimental comparison results are shown in table 1.
Example 4
In the embodiment, the low-silicon low-magnesium nodulizer is prepared from the following components in parts by mass: 88 parts of pig iron, 2 parts of zirconia, 3 parts of aluminum-iron alloy, 3 parts of calcium-iron alloy, 1 part of magnesium-iron alloy and 2 parts of composite modifier, wherein the composite modifier is a mixture of light rare earth composite modifier and heavy rare earth composite modifier; the preparation method specifically comprises the following steps:
putting 88 parts of pig iron and 2 parts of zirconia into a medium-frequency induction furnace, setting the temperature of the medium-frequency induction furnace at 1450-1500 ℃ until the pig iron and the zirconia are in a molten mixed state, continuing stirring for 4-5 hours, cooling to 900-1000 ℃ after uniformly stirring, and preserving heat for later use;
step two, preparing magnesium-iron alloy, weighing magnesium powder and iron powder, placing the magnesium powder and the iron powder in absolute ethyl alcohol, placing the mixture in a high-speed stirrer, and stirring for 15 min at the rotating speed of: 1300-1600 r/min, uniformly calcining at high temperature, and cooling after high-temperature calcination to form a magnesium-iron alloy ingot;
step three, mixing 1 part of magnesium-iron alloy ingot, 3 parts of aluminum-iron alloy and 3 parts of calcium-iron alloy (the mass parts of the aluminum-iron alloy, the calcium-iron alloy and the magnesium-iron alloy are 3:3: 1), extruding into an ingot, crushing into fine blocks, and obtaining an aluminum-calcium-iron intermediate alloy block;
and step four, mixing the intermediate alloy block of the aluminum, calcium and iron with 2 parts of the composite modifier, placing the mixture into the molten mixture obtained in the step one after the mixture is uniformly mixed, continuously heating the intermediate frequency induction furnace to 1450-1500 ℃, uniformly stirring, cooling to room temperature, repeating the process until the temperature is 1450-1500 ℃, cooling again, repeating for three times, finally heating the intermediate frequency induction furnace to 1850-1900 ℃ until the temperature is completely molten, and rapidly cooling in the protective atmosphere of nitrogen to obtain the novel low-silicon low-magnesium nodulizer. Specific experimental comparison results are shown in table 1.
TABLE 1
| Example 1 | Comparative example 1 | Example 2 | Example 3 | Example 4 | |
| Deterioration life | 5 to 6 months | 1 to 2 months | 5 to 6 months | 5 to 6 months | 5 to 6 months |
| Wear/month | 3mm | 9mm | 3mm | 3mm | 3mm |
The comparison shows that the zirconium oxide is added to change the structure of the iron casting, the formed high-melting-point compound forms a novel low-silicon low-magnesium nodulizer, the nodulizing effect is good, and the obtained iron casting has better wear resistance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.
Claims (7)
1. The preparation method of the novel low-silicon low-magnesium nodulizer is characterized in that the low-silicon low-magnesium nodulizer is prepared from the following components in parts by mass: 80-90 parts of pig iron, 1-2 parts of zirconia, 3-6 parts of aluminum-iron alloy, 3-6 parts of calcium-iron alloy, 1-2 parts of magnesium-iron alloy and 2-3 parts of composite modifier, wherein the composite modifier is a mixture of light rare earth composite modifier and heavy rare earth composite modifier; the preparation method specifically comprises the following steps:
placing 80-90 parts of pig iron and 1-2 parts of zirconia into a medium-frequency induction furnace, setting the temperature of the medium-frequency induction furnace at 1450-1500 ℃, continuing stirring for 4-5 hours until the pig iron and the zirconia are in a molten mixed state, cooling to 900-1000 ℃ after uniformly stirring, and preserving heat for later use;
step two, preparing a magnesium-iron alloy, weighing magnesium powder and iron powder, placing the magnesium powder and the iron powder in absolute ethyl alcohol, uniformly stirring by ultrasonic waves or uniformly stirring at a high speed, uniformly calcining at a high temperature, and cooling after calcining at the high temperature to form a magnesium-iron alloy ingot;
step three, mixing the magnesium-iron alloy ingot obtained in the step two, 3-6 parts of aluminum-iron alloy and 3-6 parts of calcium-iron alloy, extruding the mixture into an ingot, and crushing the ingot into fine blocks to obtain aluminum-calcium-iron intermediate alloy blocks;
and step four, mixing the intermediate alloy block of the aluminum, calcium and iron with 2-3 parts of composite modifier, placing the mixture into the molten mixture obtained in the step one after uniform mixing, continuously heating the intermediate frequency induction furnace to 1450-1500 ℃, uniformly stirring, cooling to room temperature, repeating the process until the temperature is 1450-1500 ℃, cooling again, repeating for three times, finally heating the intermediate frequency induction furnace to 1850-1900 ℃ until the temperature is completely molten, and rapidly cooling in the protective atmosphere of inert gas to obtain the novel low-silicon low-magnesium spheroidizing agent.
2. The preparation method of the novel low-silicon and low-magnesium nodulizer according to claim 1, wherein the magnesium-iron alloy is prepared from magnesium powder and iron powder, the mass ratio of the magnesium powder to the iron powder is 9:1, and the magnesium powder and the iron powder are both powder metals with a particle size of less than 200 meshes.
3. The method for preparing a novel low-silicon low-magnesium nodulizer according to claim 1, wherein the conditions of high-speed stirring in the second step are as follows: placing the mixture in a high-speed stirrer for stirring for 15 min at the rotating speed of: 1300-1600 r/min; the ultrasonic stirring time is 30 min.
4. The preparation method of the novel low-silicon low-magnesium nodulizer according to claim 1, wherein the particle size of the fine blocks in the third step is 30-50 mm.
5. The preparation method of the novel low-silicon low-magnesium nodulizer according to claim 1, wherein the mass parts of the aluminum-iron alloy, the calcium-iron alloy and the magnesium-iron alloy are 3:3: 1.
6. The preparation method of the novel low-silicon low-magnesium nodulizer according to claim 1, wherein the light rare earth composite modifier comprises a cerium rare earth modifier, the heavy rare earth composite modifier comprises an yttrium rare earth modifier, and the weight ratio of the light rare earth composite modifier to the heavy rare earth composite modifier is 1: 1.
7. The method for preparing a novel low-silicon low-magnesium nodulizer according to claim 1, wherein the inert gas is nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110353470.6A CN113136473A (en) | 2021-04-01 | 2021-04-01 | Preparation method of novel low-silicon low-magnesium nodulizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110353470.6A CN113136473A (en) | 2021-04-01 | 2021-04-01 | Preparation method of novel low-silicon low-magnesium nodulizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113136473A true CN113136473A (en) | 2021-07-20 |
Family
ID=76811396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110353470.6A Pending CN113136473A (en) | 2021-04-01 | 2021-04-01 | Preparation method of novel low-silicon low-magnesium nodulizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113136473A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10237528A (en) * | 1997-02-25 | 1998-09-08 | Aisin Takaoka Ltd | Agent and method for spheroidizing of nodular graphite cast iron |
| CN102717035A (en) * | 2012-07-09 | 2012-10-10 | 江苏多为泵业股份有限公司 | Low Si-Mg ratio and low RE-Mg nodularizer |
| CN109762955A (en) * | 2019-02-26 | 2019-05-17 | 江苏亚峰合金材料有限公司 | A kind of dedicated nodulizer of wind power plant casting |
-
2021
- 2021-04-01 CN CN202110353470.6A patent/CN113136473A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10237528A (en) * | 1997-02-25 | 1998-09-08 | Aisin Takaoka Ltd | Agent and method for spheroidizing of nodular graphite cast iron |
| CN102717035A (en) * | 2012-07-09 | 2012-10-10 | 江苏多为泵业股份有限公司 | Low Si-Mg ratio and low RE-Mg nodularizer |
| CN109762955A (en) * | 2019-02-26 | 2019-05-17 | 江苏亚峰合金材料有限公司 | A kind of dedicated nodulizer of wind power plant casting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112281006B (en) | Form regulation and control method for iron-rich phase in regenerated aluminum alloy | |
| CN109957630B (en) | Inoculant with protective film | |
| CN107641725B (en) | A kind of ferrosilite based ceramic metal and preparation method thereof | |
| CN113136473A (en) | Preparation method of novel low-silicon low-magnesium nodulizer | |
| CN107498014B (en) | One kind containing ZrO2Automobile TWIP steel covering slag and its application | |
| JP2002317219A (en) | Production method for spheroidal graphite cast iron product as-cast | |
| CN110106448B (en) | Low-expansion alloy material and preparation method thereof | |
| JPS60159155A (en) | Case hardened steel for warm forging having excellent resistance to formation of coarse grains | |
| CN113106185A (en) | Preparation process of environment-friendly composite inoculant | |
| CN110565029A (en) | Production process of S31254 super austenitic stainless steel | |
| CN111570734A (en) | Silicon-carbon-calcium inoculant and preparation method thereof | |
| CN113106186A (en) | Preparation method of inoculant for tough cast iron | |
| CN103794321A (en) | Praseodymium-iron-boron permanent magnet material for paint and preparation method | |
| CN114147213A (en) | Preparation method for powder injection molding based on high-nitrogen nickel-free stainless steel | |
| CN111041334A (en) | Rare earth silicon-nitrogen-titanium alloy and preparation method and application thereof | |
| CN116287820A (en) | Inoculant for improving tensile strength of iron casting and preparation method thereof | |
| CN110964972A (en) | Rare earth silicon-nitrogen-vanadium alloy and preparation method and application thereof | |
| CN111636025A (en) | High-entropy alloy containing Ti and C and preparation method thereof | |
| CN112481512B (en) | Method for treating yellowing of aluminum alloy ingot surface | |
| CN1125263A (en) | Method for forming nascent silicon phase in hypoeutectic aluminiumsilicon alloy | |
| CN116926399B (en) | Special ceramic material and preparation method and application thereof | |
| CN115846603B (en) | Covering slag for smelting low-carbon steel in intermediate frequency furnace and preparation method and application thereof | |
| CN114959176B (en) | Composite pellet for purifying molten steel and method for purifying molten steel | |
| CN115896524B (en) | Method for improving segregation and strength of cast superalloy through micro-nano particles | |
| CN116287527A (en) | Barium-containing high-magnesium composite nodulizer and preparation method thereof |
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: 20210720 |
|
| RJ01 | Rejection of invention patent application after publication |