CN115612782A - Carbon composite cored wire - Google Patents
Carbon composite cored wire Download PDFInfo
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- CN115612782A CN115612782A CN202211326988.1A CN202211326988A CN115612782A CN 115612782 A CN115612782 A CN 115612782A CN 202211326988 A CN202211326988 A CN 202211326988A CN 115612782 A CN115612782 A CN 115612782A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 136
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 60
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 46
- 239000011241 protective layer Substances 0.000 claims abstract description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical group [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 58
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 43
- 239000000203 mixture Substances 0.000 claims description 38
- 239000011230 binding agent Substances 0.000 claims description 17
- 229910002804 graphite Inorganic materials 0.000 abstract description 41
- 239000010439 graphite Substances 0.000 abstract description 41
- 238000000034 method Methods 0.000 abstract description 17
- 229910052710 silicon Inorganic materials 0.000 description 51
- 239000010703 silicon Substances 0.000 description 51
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 47
- 229910052749 magnesium Inorganic materials 0.000 description 47
- 239000011777 magnesium Substances 0.000 description 47
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 42
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 41
- 229910052791 calcium Inorganic materials 0.000 description 41
- 239000011575 calcium Substances 0.000 description 41
- 229910052702 rhenium Inorganic materials 0.000 description 40
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 40
- 229910052742 iron Inorganic materials 0.000 description 21
- 230000000694 effects Effects 0.000 description 16
- 239000002893 slag Substances 0.000 description 13
- 239000002245 particle Substances 0.000 description 12
- 230000008030 elimination Effects 0.000 description 11
- 238000003379 elimination reaction Methods 0.000 description 11
- 238000001556 precipitation Methods 0.000 description 11
- 238000007920 subcutaneous administration Methods 0.000 description 11
- 239000011148 porous material Substances 0.000 description 10
- 150000001247 metal acetylides Chemical class 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 241000519995 Stachys sylvatica Species 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- COHCXWLRUISKOO-UHFFFAOYSA-N [AlH3].[Ba] Chemical compound [AlH3].[Ba] COHCXWLRUISKOO-UHFFFAOYSA-N 0.000 description 1
- WNQQFQRHFNVNSP-UHFFFAOYSA-N [Ca].[Fe] Chemical compound [Ca].[Fe] WNQQFQRHFNVNSP-UHFFFAOYSA-N 0.000 description 1
- XEQZXHPGUAHHPE-UHFFFAOYSA-N [Mn].[Ca].[Si] Chemical compound [Mn].[Ca].[Si] XEQZXHPGUAHHPE-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- OOJQNBIDYDPHHE-UHFFFAOYSA-N barium silicon Chemical compound [Si].[Ba] OOJQNBIDYDPHHE-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical group [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005563 spheronization Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
-
- 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
- C21C7/0025—Adding carbon material
-
- 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
- C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention provides a carbon composite cored wire, which belongs to the technical field of cored wires, and comprises an outer protective layer and a wire core, wherein the wire core comprises the following raw materials in parts by weight: si:35-48 parts; ca:1.5-3.5 parts; mg:15-35 parts; RE:0.5-3.5 parts; c:5-20 parts of SiC:3-10 parts; the invention reduces carbon content of core-spun yarn in the process of feeding yarn, reduces the addition amount, reduces shrinkage porosity, reduces white cast, eliminates carbide, increases the number of graphite balls and improves the spherical shape of graphite balls.
Description
Technical Field
The invention relates to the technical field of core-spun yarns, in particular to a carbon composite core-spun yarn.
Background
The cored wire is formed by coiling alloy powder with a strip-shaped steel strip. The alloy powder can be divided into: calcium-silicon core-spun yarn, calcium-silicon-manganese yarn, barium-silicon yarn, barium-aluminum yarn, calcium-iron yarn, pure calcium yarn and the like.
The cored wire can effectively add smelting materials into molten steel or molten iron in the steelmaking or casting process, the cored wire can be inserted into an ideal position through professional wire feeding equipment, the core wire can be fully dissolved and chemically reacted at the ideal position after the surface of the cored wire is melted, the reaction with air and slag is effectively avoided, the absorption rate of the smelting materials is improved, the cored wire can be widely used as a deoxidizer, a desulfurizer and an alloy additive, the form of molten steel inclusions can be changed, and the quality of steelmaking and casting products is effectively improved.
Core-spun yarn spheroidization generally has two modes: punching and wire feeding.
The punching method comprises the following steps:
the punching method is an old processing mode, and the process has a plurality of problems. 1. The dependence on the operation and skill of workers is large, the responsibility of the workers is poor, the workers are careless, the operation is random, the workers do not strictly according to the process requirements, and the quality is not qualified from time to time. Sometimes, there is even a large relationship with the technical and management personnel being out of the spot, which is a problem that makes the technical and management personnel troublesome.
2. The addition amount of the nodulizer is large, and the absorption rate is low. In order to ensure the stability of the spheroidization quality, the spheroidization grade is not lower than grade 4 and the spheroidization rate is more than 70 percent according to the requirements of national and international standards. In fact, it is difficult to stabilize the quality in production by checking the standard of not less than class 4 in front of the furnace. Along with the push of the casting time, the products poured in front are qualified, the spheroidization grade of the products poured in back is unqualified, the products are scrapped, and the poured products are difficult to distinguish because the products of a plurality of enterprises have no traceability requirement. For products with strict mechanical performance requirements, particularly security components on automobiles or other equipment, major accidents and casualties can occur when products with unqualified materials are used in case of missed inspection. Therefore, in actual production, the front furnace control standard is not lower than grade 3, and even not lower than grade 2 for products with strict requirements, namely, the nodularity is more than 90 percent. In order to ensure that the spheroidization rate meets the requirement, a certain operating space is provided for workers, and the spheroidization dose has to be increased. Some enterprises add up to more than 1.8% of nodulizer.
The absorption of magnesium is unstable due to the large amount of added nodulizer. The product is easy to have the problems of white cast, poor processability, deteriorated graphite form, low spheroidization rate, unqualified material, serious slag hole and air hole of the product and the like. For the lack of skill and production management personnel, problems are found, and even the real reason is difficult to find out. The quality is also difficult to stabilize.
The addition amount of the nodulizer is large, and the cost is high. Dust and magnesium light generated in the reaction process and the severe environment of adding the alloy into the hot molten iron ladle cause that the production environment and the labor intensity are unsatisfactory. The development of enterprises is bound undoubtedly under the large environment with higher and higher national environmental protection requirements.
A wire feeding method:
the wire feeding process is characterized in that an alloy core-spun wire is continuously inserted into the bottom of molten iron by a wire feeding machine, a ladle is treated to be covered, the effective flow of air and a certain low-oxygen environment are separated by the high-pressure effect of the molten iron and the cover, and then the core-spun wire is continuously added in a small quantity at a certain speed, so that a large amount of instantaneous magnesium steam can be avoided, the safe addition of high-magnesium alloy is ensured, the large amount of molten iron overflow and the burning loss of magnesium can be avoided, the absorption rate of magnesium in the molten iron is improved, and the waste caused by the large amount of molten iron overflow can be avoided.
The core-spun yarn is inserted into the ladle at a constant speed by the yarn feeding machine to process molten iron, the whole process can be completely automated, the dependence on operators is small, and even stable production can be realized by only slightly training. The speed and the adding amount of the wire feeding are set before treatment, the spheroidization and inoculation can be automatically carried out by pressing a start button, the control is very accurate, the absorption of magnesium during spheroidization is stable, the residual magnesium amount is accurately controlled, the adding amount of a spheroidizing agent can be stabilized to about 0.9 percent, and the nodular cast iron can be stably treated.
With the continuous popularization and application of the wire feeding spheroidization process in the production of nodular cast iron, the punching-in method is gradually replaced, but the wire feeding spheroidization processing also has defects in the processing process, and the existing cored wire mainly has the following problems when the wire feeding method is adopted for processing:
1) The graphite nodules obtained by the wire feeding method treatment process are not uniformly distributed, the number of the graphite nodules is small, and the graphite nodules are different in diameter;
2) The pearlite content in the matrix tissue is higher;
3) The graphite form of the wire feeding method is poor, and the deformation resistance of the graphite is reduced due to the increase of the cutting effect on the matrix.
Disclosure of Invention
Accordingly, the present invention provides a carbon composite cored wire which exhibits less carbon reduction, reduced amount of added carbon, reduced shrinkage porosity, reduced white spots, elimination of carbides, increased graphite nodule count, and improved graphite nodule shape.
In order to solve the technical problem, the invention provides a carbon composite cored wire which comprises an outer protective layer and a wire core, wherein the wire core comprises the following raw materials in parts by weight: si:35-48 parts; ca:1.5-3.5 parts; mg:15-35 parts; RE:0.5-3.5 parts; c:5-20 parts of SiC:3-10 parts.
Further, the wire core comprises the following raw materials in parts by weight: si:35-45 parts of; ca:1.5-3 parts; mg:15-35 parts; RE:0.5-3 parts; c:5-20 parts.
Further, the wire core comprises the following raw materials in parts by weight: si:45 parts of a binder; ca:2 parts of a mixture; mg:30 parts of a binder; RE:1 part; c: and 20 parts.
Further, the particle size of C is 1.2-2mm.
Further, the wire core comprises the following raw materials in parts by weight: si:35-45 parts of; ca:1.5-3 parts; mg:20-35 parts; RE:0.5-3 parts; siC:3-10 parts.
Further, the wire core comprises the following raw materials in parts by weight: si:45 parts of (1); ca:3 parts of a mixture; mg:35 parts of (B); RE:2 parts of (1); siC:10 parts.
Further, the particle size of the silicon carbide is 0.1 to 0.8mm.
Compared with the prior art, the invention has the beneficial technical effects that:
the carbon powder has the advantages of low melting point, good recarburization effect, strong graphitization capability and the like; the silicon carbide can increase silicon and carbon, improve the reducibility of molten iron and reduce the precipitation of carbides; the core-spun yarn has the advantages that the graphite core is increased, the number of graphite balls is increased, the spheroidization rate is increased, nonmetallic inclusions and molten slag are reduced, shrinkage porosity is eliminated, subcutaneous blowholes are reduced, carbon powder or silicon carbide powder is added into the core powder of the original core-spun yarn, the core-spun yarn shows less carbon reduction in the wire feeding processing, the adding amount is reduced, the shrinkage porosity is reduced, white spots are reduced, carbides are eliminated, the number of the graphite balls is increased, and the capacity of improving the spherical shape of the graphite balls is improved.
Drawings
FIG. 1 is a table of chemical compositions of molten iron after processing a conventional cored wire;
FIG. 2 is a table showing the chemical compositions of molten iron after processing of the carbon composite cored wire of example 2 according to the present invention;
FIG. 3 is a table of data for the ingredients in the spheronization process of the present invention;
fig. 4 is a metallographic photograph of the attachments 1 to 5 in fig. 3.
Detailed Description
The following examples are given to illustrate specific embodiments of the present invention, but the following examples are only intended to illustrate the present invention in detail and do not limit the scope of the present invention in any way. The instruments and devices referred to in the following examples are conventional instruments and devices unless otherwise specified; the industrial raw materials are all conventional industrial raw materials which are sold on the market if not specifically indicated; the processing and manufacturing methods are conventional methods unless otherwise specified.
Example 1:
the carbon composite cored wire comprises an outer protective layer and a wire core, wherein the wire core comprises the following raw materials in parts by weight: si (silicon): 35 parts of (B); ca (calcium): 1.5 parts; mg (magnesium): 15 parts of (1); RE (rhenium): 0.5 part; c (carbon): 5 parts of the raw materials.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the components, 5 parts of instant carbon powder with the granularity of 0.1-2mm is added and mechanically mixed evenly.
The carbon composite cored wire prepared by adopting the raw materials has the advantages of low carbon reduction, less addition amount, reduced shrinkage porosity, reduced white cast, carbide elimination, increased graphite ball number and improved graphite ball shape.
Example 2:
the wire core comprises the following raw materials in parts by weight: si (silicon): 48 parts of a binder; ca (calcium): 3.5 parts; mg (magnesium): 35 parts of a binder; RE (rhenium): 3.5 parts; c (carbon): and 20 parts.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the above components, 20 parts of instant carbon powder with the granularity of 0.1-2mm is added and mechanically mixed evenly.
The carbon composite cored wire prepared by adopting the raw materials has the advantages of low carbon reduction, less addition amount, reduced shrinkage porosity, reduced white cast, carbide elimination, increased graphite ball number and improved graphite ball shape.
Example 3:
the wire core comprises the following raw materials in parts by weight: si (silicon): 45 parts of a binder; ca (calcium): 3 parts of a mixture; mg (magnesium): 35 parts of a binder; RE (rhenium): 3 parts of a mixture; c (carbon): and 20 parts.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the components, 20 parts of instant carbon powder with the granularity of 0.1-2mm is added and mechanically mixed evenly.
The carbon composite cored wire prepared by adopting the raw materials has the advantages of low carbon reduction, less addition amount, reduced shrinkage porosity, reduced white cast, carbide elimination, increased graphite ball number and improved graphite ball shape. The effect of the mixture ratio of the embodiment is slightly better than that of the embodiment 1 and the embodiment 2.
Example 4:
the wire core comprises the following raw materials in parts by weight: si (silicon): 40 parts of a mixture; ca (calcium): 3 parts of a mixture; mg (magnesium): 30 parts of (1); RE (rhenium): 2 parts of a mixture; c (carbon): 15 parts.
Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the components, 15 parts of instant carbon powder with the granularity of 0.1-2mm is added, and the components are mechanically and uniformly mixed.
The carbon composite cored wire prepared by adopting the raw materials has the advantages of low carbon reduction, less addition amount, reduced shrinkage porosity, reduced white cast, carbide elimination, increased graphite ball number and improved graphite ball shape.
Example 5:
the wire core comprises the following raw materials in parts by weight: si (silicon): 45 parts of (1); ca (calcium): 2 parts of a mixture; mg (magnesium): 30 parts of (1); RE (rhenium): 1 part; c (carbon): and 20 parts.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the above components, 20 parts of instant carbon powder with the granularity of 0.1-2mm is added and mechanically mixed evenly.
The carbon composite cored wire prepared by adopting the raw materials has the advantages of low carbon reduction, less addition amount, less shrinkage porosity, less white cast, carbide elimination, graphite ball number increase and graphite ball shape improvement.
Example 6:
the wire core comprises the following raw materials in parts by weight: si (silicon): 40 parts of a mixture; ca (calcium): 2.5 parts; mg (magnesium): 30 parts of (1); RE (rhenium): 3 parts of a mixture; c (carbon): and 18 parts of.
The Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the components, 18 parts of instant carbon powder with the granularity of 0.1-2mm is added, and the mixture is mechanically and uniformly mixed.
The carbon composite cored wire prepared by adopting the raw materials has the advantages of low carbon reduction, less addition amount, less shrinkage porosity, less white cast, carbide elimination, graphite ball number increase and graphite ball shape improvement.
Example 7:
the wire core comprises the following raw materials in parts by weight: si (silicon): 36 parts of (A); ca (calcium): 3 parts of a mixture; mg (magnesium): 35 parts of a binder; RE (rhenium): 2 parts of a mixture; c (carbon): and 18 parts of.
The Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the components, 18 parts of instant carbon powder with the granularity of 0.1-2mm is added, and the mixture is mechanically and uniformly mixed.
The carbon composite cored wire prepared by adopting the raw materials has the advantages of low carbon reduction, less addition amount, reduced shrinkage porosity, reduced white cast, carbide elimination, increased graphite ball number and improved graphite ball shape.
Example 8:
the wire core comprises the following raw materials in parts by weight: si (silicon): 40 parts of a mixture; ca (calcium): 2.5 parts; mg (magnesium): 20 parts of (1); RE (rhenium): 3 parts of a mixture; c (carbon): and 20 parts.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the above components, 20 parts of instant carbon powder with the granularity of 0.1-2mm is added and mechanically mixed evenly.
The carbon composite cored wire prepared by adopting the raw materials has the advantages of low carbon reduction, less addition amount, reduced shrinkage porosity, reduced white cast, carbide elimination, increased graphite ball number and improved graphite ball shape.
Example 9:
the wire core comprises the following raw materials in parts by weight: si (silicon): 40 parts of a binder; ca (calcium): 3 parts of a mixture; mg (magnesium): 25 parts of a binder; RE (rhenium): 3 parts of a mixture; c (carbon): and 20 parts.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the above components, 20 parts of instant carbon powder with the granularity of 0.1-2mm is added and mechanically mixed evenly.
The carbon composite cored wire prepared by adopting the raw materials has the advantages of low carbon reduction, less addition amount, reduced shrinkage porosity, reduced white cast, carbide elimination, increased graphite ball number and improved graphite ball shape.
Example 10:
the wire core comprises the following raw materials in parts by weight: si (silicon): 45 parts of (1); ca (calcium): 3 parts of a mixture; mg (magnesium): 30 parts of (1); RE (rhenium): 3.5 parts; c (carbon): and 20 parts.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the above components, 20 parts of instant carbon powder with the granularity of 0.1-2mm is added and mechanically mixed evenly.
The carbon composite cored wire prepared by adopting the raw materials has the advantages of low carbon reduction, less addition amount, reduced shrinkage porosity, reduced white cast, carbide elimination, increased graphite ball number and improved graphite ball shape.
Example 11:
the wire core comprises the following raw materials in parts by weight: si (silicon): 48 parts of a mixture; ca (calcium): 3.5 parts; mg (magnesium): 35 parts of (B); RE (rhenium): 3.5 parts; siC (silicon carbide): 10 parts.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the above components, 10 parts of instant silicon carbide powder with the particle size of 0.1-0.8mm is added and mechanically mixed uniformly.
In the embodiment, the carbon powder is replaced by the silicon carbide, and the silicon carbide can increase silicon and carbon, improve the reducibility of molten iron and reduce the precipitation of carbide; the graphite core is increased, the number of graphite balls is increased, the nodularity is increased, non-metallic inclusions and slag are reduced, shrinkage porosity is eliminated, subcutaneous pores are reduced, and the same technical effect can be achieved.
Example 12:
the wire core comprises the following raw materials in parts by weight: si (silicon): 35 parts of a binder; ca (calcium): 1.5 parts; mg (magnesium): 15 parts of (1); RE (rhenium): 0.5 part; siC (silicon carbide): and 3 parts.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the above components, 3 parts of instant silicon carbide powder with the particle size of 0.1-0.8mm is added and mechanically mixed uniformly.
In the embodiment, the carbon powder is replaced by the silicon carbide, and the silicon carbide can increase silicon and carbon, improve the reducibility of molten iron and reduce the precipitation of carbides; the graphite core is increased, the number of graphite balls is increased, the nodularity is increased, non-metallic inclusions and slag are reduced, shrinkage porosity is eliminated, subcutaneous pores are reduced, and the same technical effect can be achieved.
Example 13:
the wire core comprises the following raw materials in parts by weight: si (silicon): 45 parts of a binder; ca (calcium): 3 parts of a mixture; mg (magnesium): 35 parts of (B); RE (rhenium): 3 parts of a mixture; siC (silicon carbide): 10 parts.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the above components, 10 parts of instant silicon carbide powder with the particle size of 0.1-0.8mm is added and mechanically mixed uniformly.
In the embodiment, the carbon powder is replaced by the silicon carbide, and the silicon carbide can increase silicon and carbon, improve the reducibility of molten iron and reduce the precipitation of carbide; the graphite core is added, the number of graphite balls is increased, the spheroidization rate is increased, non-metallic inclusions and slag are reduced, shrinkage porosity is eliminated, subcutaneous pores are reduced, and the same technical effect can be achieved. The effect of the mixture ratio of the present example is slightly better than that of examples 11 and 12.
Example 14:
the wire core comprises the following raw materials in parts by weight: si (silicon): 35 parts of a binder; ca (calcium): 1.5 parts; mg (magnesium): 20 parts of a binder; RE (rhenium): 0.5 part; siC (silicon carbide): and 3 parts.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the above components, 3 parts of instant silicon carbide powder with the particle size of 0.1-0.8mm is added and mechanically mixed uniformly.
In the embodiment, the carbon powder is replaced by the silicon carbide, and the silicon carbide can increase silicon and carbon, improve the reducibility of molten iron and reduce the precipitation of carbides; the graphite core is increased, the number of graphite balls is increased, the nodularity is increased, non-metallic inclusions and slag are reduced, shrinkage porosity is eliminated, subcutaneous pores are reduced, and the same technical effect can be achieved.
Example 15:
the wire core comprises the following raw materials in parts by weight: si (silicon): 45 parts of (1); ca (calcium): 3 parts of a mixture; mg (magnesium): 35 parts of (B); RE (rhenium): 2 parts of (1); siC (silicon carbide): 10 parts.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the above components, 10 parts of instant silicon carbide powder with the particle size of 0.1-0.8mm is added and mechanically mixed uniformly.
In the embodiment, the carbon powder is replaced by the silicon carbide, and the silicon carbide can increase silicon and carbon, improve the reducibility of molten iron and reduce the precipitation of carbide; the graphite core is increased, the number of graphite balls is increased, the nodularity is increased, non-metallic inclusions and slag are reduced, shrinkage porosity is eliminated, subcutaneous pores are reduced, and the same technical effect can be achieved.
Example 16:
the wire core comprises the following raw materials in parts by weight: si (silicon): 40 parts of a mixture; ca (calcium): 3 parts of a mixture; mg (magnesium): 30 parts of (1); RE (rhenium): 3 parts of a mixture; siC (silicon carbide): 8 parts.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the components, 8 parts of instant silicon carbide powder with the particle size of 0.1-0.8mm is added and mechanically mixed evenly.
In the embodiment, the carbon powder is replaced by the silicon carbide, and the silicon carbide can increase silicon and carbon, improve the reducibility of molten iron and reduce the precipitation of carbides; the graphite core is added, the number of graphite balls is increased, the spheroidization rate is increased, non-metallic inclusions and slag are reduced, shrinkage porosity is eliminated, subcutaneous pores are reduced, and the same technical effect can be achieved.
Example 17:
the wire core comprises the following raw materials in parts by weight: si (silicon): 40 parts of a mixture; ca (calcium): 2.5 parts; mg (magnesium): 25 parts of a binder; RE (rhenium): 3 parts of a mixture; siC (silicon carbide): 7 parts.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the components, 7 parts of instant silicon carbide powder with the particle size of 0.1-0.8mm is added and mechanically mixed evenly.
In the embodiment, the carbon powder is replaced by the silicon carbide, and the silicon carbide can increase silicon and carbon, improve the reducibility of molten iron and reduce the precipitation of carbides; the graphite core is added, the number of graphite balls is increased, the spheroidization rate is increased, non-metallic inclusions and slag are reduced, shrinkage porosity is eliminated, subcutaneous pores are reduced, and the same technical effect can be achieved.
Example 18:
the wire core comprises the following raw materials in parts by weight: si (silicon): 35 parts of a binder; ca (calcium): 2 parts of a mixture; mg (magnesium): 25 parts of (1); RE (rhenium): 2 parts of (1); siC (silicon carbide): 5 parts of the raw materials.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the components, 5 parts of instant silicon carbide powder with the particle size of 0.1-0.8mm is added and mechanically mixed evenly.
In the embodiment, the carbon powder is replaced by the silicon carbide, and the silicon carbide can increase silicon and carbon, improve the reducibility of molten iron and reduce the precipitation of carbides; the graphite core is added, the number of graphite balls is increased, the spheroidization rate is increased, non-metallic inclusions and slag are reduced, shrinkage porosity is eliminated, subcutaneous pores are reduced, and the same technical effect can be achieved.
Example 19:
the wire core comprises the following raw materials in parts by weight: si (silicon): 38 parts of (B); ca (calcium): 1.5 parts; mg (magnesium): 30 parts of (1); RE (rhenium): 3 parts of a mixture; siC (silicon carbide): 8 parts.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the above components, 8 parts of instant silicon carbide powder with the particle size of 0.1-0.8mm is added and mechanically mixed uniformly.
In the embodiment, the carbon powder is replaced by the silicon carbide, and the silicon carbide can increase silicon and carbon, improve the reducibility of molten iron and reduce the precipitation of carbide; the graphite core is added, the number of graphite balls is increased, the spheroidization rate is increased, non-metallic inclusions and slag are reduced, shrinkage porosity is eliminated, subcutaneous pores are reduced, and the same technical effect can be achieved.
Example 20:
the wire core comprises the following raw materials in parts by weight: si (silicon): 36 parts of (a); ca (calcium): 2 parts of a mixture; mg (magnesium): 20 parts of (1); RE (rhenium): 2 parts of a mixture; siC (silicon carbide): 5 parts of the raw materials.
After Si (silicon), ca (calcium), mg (magnesium) and RE (rhenium) are prepared and smelted according to the components, 5 parts of instant silicon carbide powder with the particle size of 0.1-0.8mm is added and mechanically mixed evenly.
In the embodiment, the carbon powder is replaced by the silicon carbide, and the silicon carbide can increase silicon and carbon, improve the reducibility of molten iron and reduce the precipitation of carbide; the graphite core is added, the number of graphite balls is increased, the spheroidization rate is increased, non-metallic inclusions and slag are reduced, shrinkage porosity is eliminated, subcutaneous pores are reduced, and the same technical effect can be achieved.
While the present invention has been described in detail with reference to the drawings and examples, it will be understood by those skilled in the art that various changes in the specific parameters of the above examples may be made without departing from the spirit of the invention, and various specific examples are included in the scope of the present invention and will not be described in detail herein.
Claims (7)
1. The carbon composite cored wire comprises an outer protective layer and a wire core, and is characterized in that the wire core comprises the following raw materials in parts by weight: si:35-48 parts; ca:1.5-3.5 parts; mg:15-35 parts; RE:0.5-3.5 parts; c:5-20 parts of SiC:3-10 parts.
2. The carbon composite cored wire of claim 1, wherein the wire core comprises the following raw materials in parts: si:35-45 parts of; ca:1.5-3 parts; mg:15-35 parts; RE:0.5-3 parts; c:5-20 parts.
3. The carbon composite cored wire of claim 2, wherein the wire core comprises the following raw materials in parts by weight: si:45 parts of a binder; ca:2 parts of a mixture; mg:30 parts of a binder; RE:1 part; c: and 20 parts of the components.
4. The carbon composite cored wire of claim 3, wherein the grain size of C is 1.2-2mm.
5. The carbon composite cored wire of claim 1, wherein the wire core comprises the following raw materials in parts: si:35-45 parts of; ca:1.5-3 parts; mg:20-35 parts; RE:0.5-3 parts; siC:3-10 parts.
6. The carbon composite cored wire of claim 5, wherein the wire core comprises the following raw materials in parts by weight: si:45 parts of (1); ca:3 parts of a mixture; mg:35 parts of (B); RE:2 parts of (1); siC:10 parts.
7. The carbon composite cored wire of claim 6, wherein the grain size of the silicon carbide is 0.1-0.8mm.
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| CN202211326988.1A CN115612782A (en) | 2022-10-27 | 2022-10-27 | Carbon composite cored wire |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104328331A (en) * | 2014-11-28 | 2015-02-04 | 三祥新材股份有限公司 | Method for improving residual magnesium amount in nodular iron casting |
| CN110564915A (en) * | 2019-10-12 | 2019-12-13 | 中国重汽集团济南动力有限公司 | Magnesium core-spun yarn for vermicular treatment and use method thereof |
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- 2022-10-27 CN CN202211326988.1A patent/CN115612782A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104328331A (en) * | 2014-11-28 | 2015-02-04 | 三祥新材股份有限公司 | Method for improving residual magnesium amount in nodular iron casting |
| CN110564915A (en) * | 2019-10-12 | 2019-12-13 | 中国重汽集团济南动力有限公司 | Magnesium core-spun yarn for vermicular treatment and use method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 本钢板材股份有限公司检化验中心: "《钢铁质量检验技术》", vol. 1, 31 May 2021, 北京：冶金工业出版社, pages: 145 - 147 * |
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