CN111575429A - Lanthanum-containing nodulizer and preparation method thereof - Google Patents
Lanthanum-containing nodulizer and preparation method thereof Download PDFInfo
- Publication number
- CN111575429A CN111575429A CN202010519546.3A CN202010519546A CN111575429A CN 111575429 A CN111575429 A CN 111575429A CN 202010519546 A CN202010519546 A CN 202010519546A CN 111575429 A CN111575429 A CN 111575429A
- Authority
- CN
- China
- Prior art keywords
- parts
- weight
- oxide
- lanthanum
- metal
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
- C22C1/1047—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Composite Materials (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a lanthanum-containing nodulizer, which belongs to the technical field of casting and comprises the following materials in parts by weight: 44-50 parts by weight of silicon; 4.5 to 7.5 parts by weight of magnesium; 0.5 to 3 parts by weight of lanthanum; 1-5 parts by weight of calcium; 1-3.55 parts by weight of aluminum; 25-35 parts by weight of iron; 0.5-2 parts by weight of manganese; 3-5 parts by weight of metal oxide, wherein the metal oxide is a combination of two or three of cerium oxide, yttrium oxide and rubidium oxide; the grain size of the nodulizer is 9-13 mm, and the sulfur content in the nodulizer is less than 2.5. The invention adopts the synergistic effect of various metal oxides, improves the nodulizing rate of the nodulizer to the graphite and reduces the white cast depth of the nodulizer to the cast iron.
Description
Technical Field
The invention belongs to the technical field of casting, and particularly relates to a lanthanum-containing nodulizer and a preparation method thereof.
Background
There are many types of nodulizers in China, but the most commonly used nodulizers are prepared from alloys of rare earth metals. It is well known that the key technical link for producing nodular cast iron castings is the spheroidization process and the selection of metal components in a nodulizer, and the function of spheroidizing elements is of great importance.
The spheroidization process is the conversion of metal components into spherical shapes, which in cast iron contain some amount of carbon, as will be understood by well-known ball milling process technology: carbon will bind to iron and the morphology of the carbon element in the solidified cast iron is critical for the properties of the iron casting. It is also noted that: the residual quantity of the rare earth elements also has obvious influence on the spheroidization effect of the spheroidizing agent. At present, white iron in the prior art is common, and the performance of the white iron is embodied as hard and brittle, so that the practicability of the white iron is poor. The improvement is achieved by the fact that a large number of types of nodulizers exist in the prior art, but further research on the nodulizers is still needed from the aspects of cost saving, nodulizing effect, reduction of chilling tendency and the like.
Disclosure of Invention
The invention discloses a lanthanum-containing nodulizer aiming at the problems in the prior art, which adopts the synergistic effect of various metal oxides to improve the nodulizing rate of the nodulizer on graphite and reduce the white cast depth of the nodulizer on cast iron.
In addition, the synergistic effect among the metal oxides of the present invention is good and can inhibit the interference of the spheroidizing elements, and the present invention is realized by the following steps:
a lanthanum-containing nodulizer comprises the following materials in parts by weight: 44-50 parts by weight of silicon; 4.5 to 7.5 parts by weight of magnesium; 0.5 to 3 parts by weight of lanthanum; 1-5 parts by weight of calcium; 1-3.55 parts by weight of aluminum; 25-35 parts by weight of iron; 0.5-2 parts by weight of manganese; 3-5 parts by weight of metal oxide, wherein the metal oxide is a combination of two or three of cerium oxide, yttrium oxide and rubidium oxide; the grain size of the nodulizer is 9-13 mm, and the sulfur content in the nodulizer is less than 2.5.
Further, when the metal oxide is two combinations of cerium oxide, yttrium oxide or cerium oxide, rubidium oxide or yttrium oxide and rubidium oxide, the ratio of cerium oxide, yttrium oxide or cerium oxide, rubidium oxide or yttrium oxide and rubidium oxide is 1: 1.
further, when the metal oxide is a combination of three oxides of cerium oxide, yttrium oxide and rubidium oxide, the ratio of cerium oxide, yttrium oxide and rubidium oxide is 1: 1: 1.
furthermore, the components of 4.5-7.5 parts by weight of magnesium, 0.5-3 parts by weight of lanthanum, 1-5 parts by weight of calcium and 1-3.55 parts by weight of aluminum are respectively from metal magnesium, metal lanthanum, metal calcium and metal aluminum.
Further, the manganese component in an amount of 0.5 to 2 parts by weight is derived from a ferromanganese alloy; the 25-35 parts by weight of iron is from 75A ferrosilicon and ferromanganese.
The invention also discloses a preparation method of the lanthanum-containing nodulizer, which comprises the following steps: selecting silicon, magnesium, lanthanum, calcium, aluminum, iron, manganese and metal oxides in corresponding parts by mass, namely crushing the components by using a conical crushing roller, grinding the components into powder, sieving the powder and preparing the powder by using a medium-frequency induction furnace at a high temperature, wherein the components are metal magnesium, metal lanthanum, metal calcium, metal aluminum, manganese-iron alloy and 75A silicon iron.
Further, the preparation method comprises the following steps: smelting by using a 1-ton medium-frequency induction furnace; the smelting temperature is 1250-.
Further, the preparation method comprises the following steps: the distance between each group of rolling shafts of the conical crushing roller is equal, and the screening mesh number of the nodulizer is 60-70 meshes.
The beneficial effects of the invention and the prior art are as follows:
1) the metal oxides have good synergistic effect, can inhibit the interference of anti-spheroidizing elements, greatly reduce the silicon content and the rare earth content in the components of the spheroidizing agent, can effectively eliminate the attachment of carbides of thin-wall parts, and improve the spheroidizing efficiency;
2) according to the invention, by introducing the metal rare earth elements of cerium oxide, yttrium oxide and rubidium oxide, the spheroidization rate of graphite by the spheroidizing agent is improved, and meanwhile, the white cast depth of cast iron by the spheroidizing agent can be reduced, thus being beneficial to spheroidization and improving the strength, hardness and heat resistance of the alloy.
3) The strength, hardness and heat resistance of the alloy can be improved by the synergistic cooperation of the added magnesium, lanthanum and calcium;
4) in the method, the crushing speed of the nodulizer can be increased by the aid of the conical crushing rollers, crushing efficiency is improved, and the uniform intervals among the crushing rollers are equal, so that the nodulizer with uniform particle sizes can be prepared.
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
Selecting 44 parts by weight of silicon; 6 parts by weight of magnesium; 2.5 parts by weight of lanthanum; 3 parts by weight of calcium; 2.6 parts by weight of aluminum; 30 parts by weight of iron; 2 parts by weight of manganese; 4 parts by weight of metal oxide, namely metal magnesium, metal lanthanum, metal calcium, metal aluminum, ferromanganese alloy, 75A ferrosilicon, cerium oxide, yttrium oxide and rubidium oxide, crushing the components by using a conical crushing roller, grinding the components into powder, sieving the powder by a sieve of 60-70 meshes, and smelting the powder by a 1-ton medium-frequency induction furnace; the melting temperature is 1250-.
Example 2
Selecting 44 parts by weight of silicon; 4.5 parts by weight of magnesium; 0.5 parts by weight of lanthanum; 1 part by weight of calcium; 1 part by weight of aluminum; 25 parts by weight of iron; 0.5 parts by weight of manganese; 3 parts by weight of metal oxide, namely metal magnesium, metal lanthanum, metal calcium, metal aluminum, manganese iron alloy, 75A ferrosilicon, cerium oxide, yttrium oxide and rubidium oxide, wherein the proportion of the cerium oxide, the yttrium oxide and the rubidium oxide is 1: 1: 1, crushing the components by using a conical crushing roller, grinding the components into powder, sieving the powder by using a 60-70-mesh sieve, and smelting the powder by using a 1-ton medium-frequency induction furnace; the melting temperature is 1250-.
Example 3
Selecting 50 parts by weight of silicon; 7.5 parts by weight of magnesium; 3 parts by weight of lanthanum; 5 parts by weight of calcium; 3.55 parts by weight of aluminum; 35 parts by weight of iron; 2 parts by weight of manganese; 5 parts by weight of metal oxide, namely metal magnesium, metal lanthanum, metal calcium, metal aluminum, ferromanganese alloy, 75A ferrosilicon, cerium oxide, yttrium oxide and rubidium oxide, wherein the proportion of the cerium oxide, the yttrium oxide and the rubidium oxide is 1: 1: 1, crushing the components by using a conical crushing roller, grinding the components into powder, sieving the powder by using a 60-70-mesh sieve, and smelting the powder by using a 1-ton medium-frequency induction furnace; the melting temperature is 1250-.
Example 4
Selecting 47 parts by weight of silicon; 6 parts by weight of magnesium; 2 parts by weight of lanthanum; 3 parts by weight of calcium; 2 parts by weight of aluminum; 32 parts by weight of iron; 1.5 parts by weight of manganese; 4 parts by weight of metal oxide, namely metal magnesium, metal lanthanum, metal calcium, metal aluminum, ferromanganese alloy, 75A ferrosilicon, cerium oxide and yttrium oxide, wherein the weight parts of the cerium oxide and the yttrium oxide are all 2 parts, the components are crushed by a conical crushing roller, ground into powder, sieved by a 60-70 mesh sieve, and smelted by a 1-ton medium-frequency induction furnace; the melting temperature is 1250-.
Comparative example 1
Selecting 44 parts by weight of silicon; 6 parts by weight of magnesium; 2.5 parts by weight of lanthanum; 3 parts by weight of calcium; 2.6 parts by weight of aluminum; 30 parts by weight of iron; 2 parts by weight of manganese, namely crushing the components by using a conical crushing roller, grinding the components into powder, sieving the powder by using a 60-70 mesh sieve, and smelting the powder by using a 1-ton medium-frequency induction furnace; the melting temperature is 1250-. The comparative example 1 is different from the example 1 in that any metal oxide of cerium oxide, yttrium oxide, rubidium oxide is not added.
Comparative example 2
Selecting 44 parts by weight of silicon; 4.5 parts by weight of magnesium; 0.5 parts by weight of lanthanum; 1 part by weight of calcium; 1 part by weight of aluminum; 25 parts by weight of iron; 0.5 parts by weight of manganese; 3 parts by weight of metal oxide, namely metal magnesium, metal lanthanum, metal calcium, metal aluminum, ferromanganese, 75A ferrosilicon and cerium oxide with corresponding contents by weight, crushing the components by adopting a conical crushing roller, grinding the components into powder, sieving the powder by a sieve of 60-70 meshes, and smelting the powder by a 1-ton medium-frequency induction furnace; the melting temperature is 1250-. The comparative example 2 is different from the example 2 in that yttrium oxide and rubidium oxide were not added, and only one of them was contained.
Comparative example 3
Selecting 50 parts by weight of silicon; 7.5 parts by weight of magnesium; 3 parts by weight of lanthanum; 5 parts by weight of calcium; 3.55 parts by weight of aluminum; 35 parts by weight of iron; 2 parts by weight of manganese; 10 parts by weight of metal oxide, namely metal magnesium, metal lanthanum, metal calcium, metal aluminum, manganese iron alloy, 75A ferrosilicon, cerium oxide, yttrium oxide and rubidium oxide, wherein the proportion of the cerium oxide, the yttrium oxide and the rubidium oxide is 1: 1: 1, crushing the components by using a conical crushing roller, grinding the components into powder, sieving the powder by using a 60-70-mesh sieve, and smelting the powder by using a 1-ton medium-frequency induction furnace; the melting temperature is 1250-. The difference between this comparative example 1 and example 1 is that an excess of metal oxides of cerium oxide, yttrium oxide and rubidium oxide was added.
The results of the comparison of examples 1 to 2 and comparative examples 1 to 2 show that: the spheroidizing agents of examples 1 to 3 of the present invention had spheroidization rates of graphite 5 times that of comparative examples 1 to 3. The comparison of the results of example 3 and comparative example 3 shows that the addition amount of the excessive metal oxide is not improved, and therefore, the optimum ratio of cerium oxide, yttrium oxide and rubidium oxide is 1: 1: 1, the optimal weight is 3-5 parts of metal oxide.
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 (8)
1. A lanthanum-containing nodulizer comprises the following materials in parts by weight:
44-50 parts by weight of silicon; 4.5 to 7.5 parts by weight of magnesium; 0.5 to 3 parts by weight of lanthanum; 1-5 parts by weight of calcium; 1-3.55 parts by weight of aluminum; 25-35 parts by weight of iron; 0.5-2 parts by weight of manganese; 3-5 parts by weight of metal oxide, wherein the metal oxide is a combination of two or three of cerium oxide, yttrium oxide and rubidium oxide; the grain size of the nodulizer is 9-13 mm, and the sulfur content in the nodulizer is less than 2.5.
2. The lanthanum-containing nodularizer according to claim 1, wherein when the metal oxide is cerium oxide, yttrium oxide or cerium oxide, rubidium oxide or two combinations of yttrium oxide and rubidium oxide, the ratio of cerium oxide, yttrium oxide or cerium oxide, rubidium oxide or yttrium oxide and rubidium oxide is 1: 1.
3. the lanthanum-containing nodularizer according to claim 1, wherein when the metal oxide is a combination of three oxides of cerium oxide, yttrium oxide and rubidium oxide, the ratio of cerium oxide to yttrium oxide to rubidium oxide is 1: 1: 1.
4. the lanthanum-containing nodulizer according to claim 1, wherein the components of the magnesium 4.5-7.5 parts by weight, the lanthanum 0.5-3 parts by weight, the calcium 1-5 parts by weight and the aluminum 1-3.55 parts by weight are respectively magnesium metal, lanthanum metal, calcium metal and aluminum metal.
5. The lanthanum-containing nodulizer according to claim 1, wherein the manganese component in an amount of 0.5-2 parts by weight is derived from ferromanganese; the 25-35 parts by weight of iron is from 75A ferrosilicon and ferromanganese.
6. The lanthanum-containing nodulizer of claim 1, prepared by a method comprising: selecting silicon, magnesium, lanthanum, calcium, aluminum, iron, manganese and metal oxides in corresponding parts by mass, namely crushing the components by using a conical crushing roller, grinding the components into powder, sieving the powder and preparing the powder by using a medium-frequency induction furnace at a high temperature, wherein the components are metal magnesium, metal lanthanum, metal calcium, metal aluminum, manganese-iron alloy and 75A silicon iron.
7. The lanthanum-containing nodulizer according to claim 6, wherein the preparation method comprises the following steps: smelting by using a 1-ton medium-frequency induction furnace; the smelting temperature is 1250-.
8. The lanthanum-containing nodulizer according to claim 6, wherein the preparation method comprises the following steps: the distance between each group of rolling shafts of the conical crushing roller is equal, and the screening mesh number of the nodulizer is 60-70 meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010519546.3A CN111575429A (en) | 2020-06-09 | 2020-06-09 | Lanthanum-containing nodulizer and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010519546.3A CN111575429A (en) | 2020-06-09 | 2020-06-09 | Lanthanum-containing nodulizer and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111575429A true CN111575429A (en) | 2020-08-25 |
Family
ID=72127451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010519546.3A Pending CN111575429A (en) | 2020-06-09 | 2020-06-09 | Lanthanum-containing nodulizer and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111575429A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112899429A (en) * | 2021-01-14 | 2021-06-04 | 内蒙古星晟工程技术有限公司 | Spheroidizing agent and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1687464A (en) * | 2005-03-31 | 2005-10-26 | 龙南县龙钇重稀土材料有限责任公司 | Composite nodulizer of yttrium based heavy rare earths magnesium |
| US20070134149A1 (en) * | 2005-12-07 | 2007-06-14 | Asahi Tec Corporation | Spheroidizing agent of graphite |
| CN105671236A (en) * | 2016-04-06 | 2016-06-15 | 欧玛(中国)汽车部件有限公司 | La nodulizer for nodular cast iron |
| CN107326139A (en) * | 2017-06-27 | 2017-11-07 | 苏州楚博生物技术有限公司 | A kind of rare earth magnesium nodularizer |
| CN109504814A (en) * | 2018-12-27 | 2019-03-22 | 江苏亚峰合金材料有限公司 | The low rare-earth nodularizer of novel low silicon and preparation method |
| CN110438281A (en) * | 2019-08-16 | 2019-11-12 | 哈尔滨理工大学 | A kind of magnesium-rare earth nodulizer and the preparation method and application thereof without Si |
-
2020
- 2020-06-09 CN CN202010519546.3A patent/CN111575429A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1687464A (en) * | 2005-03-31 | 2005-10-26 | 龙南县龙钇重稀土材料有限责任公司 | Composite nodulizer of yttrium based heavy rare earths magnesium |
| US20070134149A1 (en) * | 2005-12-07 | 2007-06-14 | Asahi Tec Corporation | Spheroidizing agent of graphite |
| CN105671236A (en) * | 2016-04-06 | 2016-06-15 | 欧玛(中国)汽车部件有限公司 | La nodulizer for nodular cast iron |
| CN107326139A (en) * | 2017-06-27 | 2017-11-07 | 苏州楚博生物技术有限公司 | A kind of rare earth magnesium nodularizer |
| CN109504814A (en) * | 2018-12-27 | 2019-03-22 | 江苏亚峰合金材料有限公司 | The low rare-earth nodularizer of novel low silicon and preparation method |
| CN110438281A (en) * | 2019-08-16 | 2019-11-12 | 哈尔滨理工大学 | A kind of magnesium-rare earth nodulizer and the preparation method and application thereof without Si |
Non-Patent Citations (2)
| Title |
|---|
| 盛达: "稀土在铸铁中应用六十年的进展与展望", 《稀土》 * |
| 芮争家等: "稀土在铸铁中的作用及应用", 《水利电力机械》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112899429A (en) * | 2021-01-14 | 2021-06-04 | 内蒙古星晟工程技术有限公司 | Spheroidizing agent and preparation method thereof |
| CN112899429B (en) * | 2021-01-14 | 2023-03-03 | 内蒙古星晟工程技术有限公司 | Spheroidizing agent and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101660097B (en) | Wear-resisting alloy steel with high boron, high chrome and low carbon and preparation method thereof | |
| CN103498107A (en) | High-boron high-chromium low-carbon high-temperature-resistant wear-resisting alloy steel and manufacturing method thereof | |
| CN102717035B (en) | Low Si-Mg ratio and low RE-Mg nodularizer | |
| CN112853190B (en) | High-entropy cast iron and preparation method thereof | |
| Riposan et al. | The importance of rare earth contribution from nodulizing alloys and their subsequent effect on the inoculation of ductile iron | |
| CN103498108A (en) | High-boron high-chromium low-carbon wear-resisting alloy steel with good red hardness and manufacturing method thereof | |
| CN102382924B (en) | Preparation method of nodulizing agent for nodular cast iron | |
| CN103060668A (en) | Carbide-containing ductile iron and its making method | |
| CN102400032B (en) | Large-cross-section nodular cast iron | |
| CN102392094B (en) | Spheroidizing agent for spheroidal graphite cast iron, and preparation method thereof | |
| CN113699300A (en) | Inoculant for nodular cast iron flywheel shell and preparation method thereof | |
| CN112680650A (en) | High-strength nodular cast iron and preparation method thereof | |
| CN114381649B (en) | High-strength high-toughness nodular cast iron material and casting method thereof | |
| CN1101682A (en) | Low alloy white cast iron foundery grinding ball for nodular iron ore powder | |
| CN111575429A (en) | Lanthanum-containing nodulizer and preparation method thereof | |
| CN112725681B (en) | Iron-cobalt-nickel-manganese-copper high-entropy cast iron and preparation method and application thereof | |
| CN110964968B (en) | Efficient vermiculizer for vermicular graphite cast iron, and preparation and production methods thereof | |
| CN104593663B (en) | A kind of wear-resistant white cast iron and preparation method thereof | |
| CN103525969A (en) | Nodular cast iron rare-earth magnesium silicon nodularizer | |
| CN110423937B (en) | Alloyed gray cast iron resisting corrosion of high-temperature aluminum and zinc liquid and smelting process thereof | |
| CN112626410A (en) | High-toughness high-wear-resistance boron-containing white cast iron | |
| CN109594007B (en) | Vermicular graphite cast iron and preparation process and application thereof | |
| CN114369756B (en) | As-cast QT700-8 material and casting method and application thereof | |
| CN102373365B (en) | Large-section nodular cast iron | |
| CN114657451A (en) | Hypereutectic high-chromium cast iron and suspension and modification composite treatment 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200825 |