JPH10166121A - Flux for melting and casting metal and method for melting and casting copper-iron alloy - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the absorbing separation, melting and mixing characteristic of impurity and reliability and to obtain a high quality metal or alloy by using a flux containing the lime component composed of hexagonal crystal and platy laminated grain structure at a specific quantity or more and the balance contaminant. SOLUTION: An induction heating furnace 1 has an induction coil 2 and melts by charging the flux S together with a metal M1 of Fe, and Cu, etc., or the metal M1 and an alloying metal M2 of Fe, etc. In such a way, molten metal or molten alloy M3 (M6) is formed. The flux S contains essentially of >=95wt.% the lime component composed of the hexagonal crystal and the platy laminated grain structure and the balance <5wt.% contaminant. The lime component is efficiently fined in the molten metal, and the deoxidizing separation to dissolved oxygen and separating performance to the impurity, are improved. Further, Si at about 0.3wt.% and Mn at about 1.0wt.% are added into the molten metal or alloy together with the flux. By this method, the absorbing separation, melting and mixing characteristic of the impurity and the reliability can remarkably be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal melting and melting method suitable for melting and casting various metals and alloys such as copper-iron alloys.
The present invention relates to a casting solvent and a method of melting and casting a copper-iron alloy.

[0002]

2. Description of the Related Art A conventional example of melting and casting of various iron-based steels will be described. First, pig iron produced by a blast furnace is refined by a converter to adjust the components, and then cast and solidified by a mold to cast the steel. Make a lump. Next, the steel ingot is melted by an induction heating furnace, etc., the necessary mother alloy is added and melted, and various impurities are floated and removed by deoxidation and separation with a solvent.
Solvent slab (steel slag) formed on the upper part prevents oxidation to form molten steel. This molten steel is made into an ingot directly or with a mold or the like, and this ingot is forged or rolled to form various shaped steels. They are manufactured into steel or sheet steel, or molten steel is continuously taken out with a nozzle and quenched into a wire, which is further drawn to manufacture various wires.

In melting various metals or alloys,
The conventional quicklime applied to the solvent is a calcined product of limestone. As shown in FIG. 4, the quicklime mainly comprises a quicklime component composed of hexagonal crystals and columnar aggregates, and is dissolved in the furnace. Alternatively, it functions to deoxidize and separate dissolved oxygen in the alloy to absorb impurities to improve accuracy, dissolution, and mixing, and to cover the molten metal or alloy to prevent oxidation.

For example, in the melting and casting of a copper-iron alloy,
The conventional quick lime applied to the solvent is difficult to be refined in the molten metal because it has such a structure, and there is a limit to the deoxidation and separation performance as well as the refinement of iron, that is, its diffusion and mixing performance. When the copper content is increased to 20 wt% or more,
As shown in FIG. 5, iron has a remarkably segregated structure, and a copper-iron alloy having a homogeneous eutectic structure cannot be obtained. Therefore, at present, it is manufactured into a copper-iron alloy having a low copper content (10% by weight or less). Since a copper-iron alloy having such a low copper content does not exhibit much copper properties, it is desired to develop a technique for melting and casting a copper-iron alloy having a high copper content.

[0005]

Conventionally, a solvent for dissolving and casting various metals or alloys is composed of a quicklime component having a structure that is more difficult to be finely divided in a molten metal as described above, and is used in combination with a molten metal or alloy. There are basic problems such as poor conformability and a reduction in iron fineness, that is, diffusion mixing property, etc. together with deoxidation separation performance. Further, for example, when a copper-iron alloy having a high copper content is melted and cast, as shown in FIG. 5, a structure in which iron segregates remarkably cannot be produced into a copper-iron alloy having a homogeneous eutectic structure. There is.

The present invention has been developed to solve the above-mentioned problems, and its object is to mainly include a quicklime component composed of hexagonal crystals and a plate-like laminated grain structure, Or, as a solvent to which an appropriate amount of silicon and manganese are added, the metal dissolution / casting with improved quality by improving the separation / dissolution / mixing performance and reliability of impurities, such as enhancing the deoxidation separation performance and the dissolution / diffusion / mixing performance. And a method of melting and casting a copper iron alloy.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a method for melting a metal or alloy by adding a solvent to a metal or alloy and dissolving the dissolved oxygen in the metal with the solvent and absorbing impurities to prevent oxidation. In a metal melting / casting solvent for casting a molten metal or a molten alloy as an alloy, a quicklime component consisting mainly of hexagonal crystals and having the structure of plate-like laminated grains is 95 watts.
It is characterized by a solvent for metal melting and casting in which contaminants account for at least 5% by weight and the remaining less than 5% by weight. The quicklime component of 95% by weight or more composed of hexagonal crystals and composed of plate-like laminated grains is contained in the molten metal. Various kinds of metals or alloys, such as effective refinement, deoxidation separation of dissolved oxygen, enhancement of impurity separation performance, and refinement of metals into crystal grains to effectively improve melting or mixing performance of metals or alloys It is widely used as a solvent for dissolving and casting.

In addition, in the above-mentioned solvent for melting and casting a metal, about 0.3% by weight of silicon and about 1.0% by weight of manganese are added to the solvent or metal to be dissolved. Characterized by the solvent, deoxidation and separation of dissolved oxygen by addition of moderate silicon and manganese,
Dissolving and mixing performance as well as impurity separation performance are further enhanced.

Further, copper is put into an induction heating furnace and melted,
The mixture occupies 95 wt% or more of the quicklime component mainly composed of hexagonal crystals and a plate-like laminated grain structure, and the mixture occupies the remaining less than 5 wt%.
wt% and about 1.0 wt% manganese added solvent
Dissolve in copper melted with iron, dissolve and separate dissolved oxygen in copper and iron by solvent, refine the crystal nucleus into iron melted copper, disperse and melt, and absorb impurities. The method is characterized by the method of melting and casting a copper-iron alloy for casting a copper-iron molten alloy after preventing oxidation to a copper-iron molten alloy, and excellent deoxidation of dissolved oxygen and separation of impurities by the above-mentioned solvent. Due to the refinement and diffusion mixing performance of the molten metal together with the performance, iron is diffused into the crystal nucleus in the refined and melted copper and melted into a copper-iron molten alloy, and even with a high copper content copper and iron Is cast into a high-precision copper-iron alloy with a homogeneous eutectic structure.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A shows an embodiment of a metal melting and casting solvent according to the present invention, FIGS. 1B and 2A show a metal melting and casting method (first embodiment), and FIG. 9 shows a melting / casting method (second embodiment). In the figure, 1 is an induction heating furnace having an induction coil 2, 3 is a nozzle provided at the bottom of the induction heating furnace, 5 is a tray (tandish), 6 is a mold, 11
Is a cooling / casting tank containing the cooling water 10, CaO is a quicklime component, M1 is a metal to be melted and cast (metals such as iron Fe and copper Cu), and M2 is a metal (iron Fe) for an alloy to be melted into the metal M1. M1, M2 are alloys, S is a solvent, S
1 is a quicklime slab (steel slag) formed of a solvent or the like and covering the top of the molten metal or molten alloy, M3 is a molten metal or molten alloy, and M6 is a copper-iron molten alloy.

In the illustrated embodiment, the metal M1 or alloy M1,
A solvent is added to and dissolved in M2, and metals M1, M
2 is a solvent for metal melting and casting for casting molten metal or molten alloy by deoxidizing and separating dissolved oxygen in 2 and absorbing impurities to prevent oxidation to form molten metal or molten alloy M3. Contains 95% by weight or more of quicklime component CaO composed of a plate-like laminated grain structure, and the remaining 5%
% Of the mixture is a solvent S for melting and casting a metal, characterized in that the contaminants account for less than 10%.

In the above-mentioned solvent for melting and casting metal, the metal M1 or alloy M1, M1
About 0.3 wt% of silicon Si and manganese Mn
Is added to the solvent S for metal melting and casting.

Further, copper Cu is put into the induction heating furnace 1 and melted, and the mixture accounts for 95% by weight or more of the quicklime component mainly composed of hexagonal crystals and the structure of plate-like laminated grains, and the mixture accounts for less than 5% by weight, or further melts. About 0.3 wt% of silicon Si and about 1 wt% of manganese Mn with respect to alloys M1 and M2
% Of the added solvent S is dissolved in copper Cu dissolved with iron Fe, and the dissolved oxygen in copper and iron is deoxidized and separated into fine particles in the form of crystal nuclei in copper in which iron is dissolved. In addition, the molten copper-iron alloy M6 is cast after absorbing the impurities to prevent oxidation to prevent oxidation and then casting the molten copper-iron alloy M6.

More specifically, the solvent S for dissolving and casting metal of the present invention is preferably used to form various shells at a temperature of 850 ° C.
It is formed by firing in the range of about 1000 ° C.
As shown in the figure, the quicklime component mainly composed of hexagonal crystals and having the structure of plate-like laminated grains contains 95% by weight or more, and the remaining 5%
Less than wt% is composed of contaminants such as Mg, Si, and Al, has a moderate alkalinity (about pH 9.8), a melting point of about 848 ° C. and a boiling point of 1,487 ° C., and has relatively few impurities.
In the induction heating furnace 1, this solvent S is replaced with various metals M1 or alloys M1 and M2 such as iron Fe, copper Cu and aluminum Al.
When melted together, the hexagonal crystal forms a plate-like laminated grain structure as described above, so it is more easily remarkably atomized or refined in the molten metal, and excellent deoxidation and separation of metal or alloy is achieved. In addition, it effectively exhibits the absorption / separation, dissolution and diffusion / mixing performance of impurities. In addition, when limestone is treated by a special processing means such as firing at a high temperature several hundred degrees higher than the conventional method, the quicklime component Ca having the above-described structure can be obtained.
O can also be manufactured, and is widely used as a solvent for melting and casting various metals or alloys.

In the above-mentioned solvent S for melting and casting metal, various kinds of metals M1 which are preferably dissolved if necessary.
Alternatively, silicon Si is added to the alloy M1 and M2 in an amount of about 0.
Solvent S containing 3 wt% and about 1 wt% of manganese Mn
Apply as By adding the appropriate amounts of silicon and manganese, the deoxidizing and separating performance, the separating performance of impurities, and the dissolving and diffusion mixing performance can be further enhanced.

Further, the induction heating furnace 1 preferably has a structure shown in FIG.
As shown in FIG. 3, the solvent S is put together with various metals M1 such as iron Fe or a metal M1 such as iron Fe and a metal M2 such as copper Cu, and the metal M1 or the alloys M1 and M2 are electromagnetically induced. When heated, the melted metal or alloy flows as shown by the dotted line to enhance the mixing property, promotes the separation of dissolved oxygen from acid, and forms a quicklime slab S1 at the upper part to form the melted metal or alloy. High-precision molten metal or molten alloy M3
(Copper-iron molten alloy M6). The molten metal or alloy is cast as shown in FIG. 2A to obtain a highly accurate metal or alloy. If necessary, a nozzle 3 is provided at the furnace bottom.

The first embodiment shown in FIG. 2A is a general method for melting and casting various metals or alloys. As shown in the drawing, a metal M1 or an alloy M1, M2 and an appropriate amount When the solvent S is added and heated, the metal or alloy melts and flows as shown by the dotted line, and the solvent S contains 95% by weight or more of quicklime component CaO mainly composed of hexagonal crystals and having a structure of plate-like laminated grains ( The remaining less than 5 wt% is occupied by contaminants.
And effectively mixed with the flow of the molten metal or alloy,
Demonstrates excellent deoxygenation and separation of dissolved oxygen and impurities, and effectively promotes fine metal particles.The impurities in each metal are effectively absorbed and separated by the solvent, resulting in high precision. Are effectively diffused and homogeneously mixed and dissolved. The solvent that has absorbed the impurities in the metal is floating Y
2, a high-precision molten metal or molten alloy M3 is obtained, for example, by forming a solvent slab S1 on the upper portion to cover the molten metal or molten alloy M3 and effectively prevent oxidation. By applying the induction heating furnace 1 as shown, the flow of the molten metal M2 is effectively promoted. This molten metal or molten alloy M3 is cast directly, or as shown in the drawing, is cast with a mold 6 using a saucer 5 or the like to form an ingot M4. To a homogeneous metal or alloy material M5.

In addition, in the melting and casting, in addition to the solvent S, about 0.3 wt% of silicon Si and about 0.3 wt% of manganese Mn are added to the mass of the metal M1 or the alloys M1 and M2. When the metal or alloy is melted and cast, the deoxidizing and separating performance of the metal or alloy can be further enhanced, and the melting and diffusion mixing performance can be further enhanced.

The second embodiment shown in FIG. 2B is a method of melting and casting a copper-iron alloy. When copper Cu is put into an induction heating furnace 1 as shown in FIG. Copper has iron Fe and solvent S (preferably silicon S as described above).
i and manganese Mn are added) and dissolved. Iron Fe (M1) having a high melting point is melted in copper Cu (M2) having a relatively low melting point and flows and diffuses as indicated by the dotted line in the figure. The solvent S exhibits excellent deoxidation separation of dissolved oxygen, separation of impurities, dissolution and antioxidation performance as described above,
Iron is well diffused and mixed in the melted copper to form a crystal nucleus and is melted and melted in a homogeneous copper-iron molten alloy M6. This molten copper-iron alloy is preferably continuously taken out from the nozzle 3 shown in the drawing at a constant speed, dropped naturally in the cooling water 10 of the cooling / casting tank agent 11 and rapidly cooled to obtain a linear copper-iron alloy M.
7 is cast. A high copper content makes it easier to cut during casting, but according to this melting and casting method, an excellent, highly accurate and homogeneous copper iron alloy can be produced smoothly. Even when the copper content is as high as 60 to 80%, it can be melted and cast in a copper-iron alloy M7 having a homogeneous eutectic structure as shown in FIG. This high-copper-content copper-iron alloy has significantly improved copper properties as well as iron properties.
It is widely used effectively as a heat exchange material.

In the melting and casting of the copper-iron alloy, the melting point of copper Cu is 1,085 ° C. and the melting point of iron Fe is 1,53.
5 ° C., this solvent S has a Ca melting point of 848 ° C.
With a boiling point of 1,487 ° C., the function of the solvent is effectively exhibited in dissolving copper and iron, and the above-mentioned excellent dissolving and casting actions and effects can be obtained.

The solvent S for melting and casting metal of the present invention is applied to melting and casting of various metals or alloys. Further, in addition to the illustrated example, various induction heating furnaces are used, and are widely applied to various casting processes.

[0022]

According to the present invention, there is provided a metal melting / casting apparatus having a composition as described above, comprising 95% by weight or more of quicklime composed mainly of hexagonal crystals and having the structure of plate-like laminated grains, and the remaining less than 5% by weight of contaminants. 95% by weight or more of quicklime component consisting of hexagonal crystal and plate-like laminated grain structure is remarkably finely divided in molten metal and deoxidized and separated from dissolved oxygen in dissolved metals or alloys. In addition to enhancing the performance, the metal or alloy is refined into crystal grains to improve the melting and mixing performance effectively. Can be obtained.

In the above-mentioned solvent for metal melting and casting, the solvent or metal for alloy melting is prepared by adding about 0.3% by weight of silicon and about 1.0% by weight of manganese to the dissolved metal or alloy. By adding moderate amounts of silicon and manganese as a solvent, it is possible to further enhance the deoxidation separation of dissolved oxygen and the separation performance of impurities, as well as the finer melting and mixing performance.

Further, by dissolving and casting a copper-iron alloy using the above-mentioned solvent having the above-mentioned constitution, excellent deoxidation and separation of dissolved oxygen by this solvent, separation of impurities, and refinement and mixing of molten metal. Due to the performance, iron is diffused and mixed in the form of crystal nuclei in the melted copper, and even when the copper content is high, the iron has a homogeneous eutectic structure in the copper, and easily has high precision. Melting, casting performance and reliability of the copper-iron alloy are remarkably improved, for example, the copper-iron alloy can be melted and cast.

[Brief description of the drawings]

FIG. 1 is a microphotograph showing one embodiment of a solvent for metal melting and casting of the present invention (A), and a longitudinal sectional view showing one embodiment of an induction heating furnace (B).

FIG. 2 is a process diagram (A) of a first embodiment showing a method of melting and casting a metal or an alloy, and a process diagram (B) of a second embodiment showing a method of melting and casting a copper-iron alloy.

FIG. 3 is a microphotograph of the copper-iron alloy manufactured in the second embodiment.

FIG. 4 is a microphotograph showing a conventional solvent.

FIG. 5 is a microphotograph of a copper-iron alloy manufactured using a conventional solvent.

[Explanation of symbols]

 1 Induction heating furnace M1, M2 Metal or alloy M3 Molten metal or molten alloy M6 Molten copper-iron alloy S Solvent

Claims (3)

[Claims] 1. A solvent is added to a metal or alloy and dissolved.
Solvents for metal dissolution and casting are used to deoxidize and separate dissolved oxygen in metals with a solvent, absorb impurities and prevent oxidation to form a molten metal or molten alloy. Contains 95% by weight or more of quicklime component consisting of crystal and plate-like laminated grain structure, and the remaining 5w
metal dissolution characterized in that contaminants account for less than t%
Solvent for casting. 2. The metal melting and casting solvent according to claim 1, wherein said solvent contains about 0.3% by weight of silicon and about 1.0% by weight of manganese based on the dissolved metal or alloy.
% Solvent for dissolving and casting metal, characterized in that it has been added in%. 3. Introducing copper into an induction heating furnace and melting it, and removing quicklime component consisting mainly of hexagonal crystals and having the structure of plate-like laminated grains into 95%.
Contaminants occupy more than 5% by weight and contain less than 5% by weight, or a solvent in which about 0.3% by weight of silicon and about 1.0% by weight of manganese are added to the alloy to be further dissolved is put into copper dissolved with iron. Dissolves and dissolves and separates dissolved oxygen in copper and iron with a solvent, dissolves it into copper in which iron is dissolved, refines it into crystal nuclei, diffuses it, and dissolves it. A method for melting and casting a copper-iron alloy, comprising casting a molten copper-iron alloy after forming the molten alloy.