KR20140057897A - Copper alloy materials for brassware and method for production same - Google Patents

Abstract

Disclosed are a copper alloy material for brassware and a manufacturing method thereof. The copper alloy material for brassware according to the present invention has the same color and strength characteristics as those of a copper alloy material for traditional forged high quality brassware and has improved manufacturability that prevents cracks from being generated during hot working, thereby facilitating mass production. The copper alloy material for brassware according to the present invention can be used for household items including musical instruments, tableware, cookware and accessories instead of the existing material for traditional forged high quality brassware because the copper alloy material for brassware satisfies features required for manufacturing the forged high quality brassware such as drawing characteristics, elongation rate and thermal treatment characteristics owing to excellent cold workability after thermal treatment.

Description

TECHNICAL FIELD [0001] The present invention relates to an organic copper alloy material and a method of manufacturing the same. BACKGROUND ART [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copper alloy material for an organic (brass) device and a manufacturing method thereof. More particularly, the present invention relates to an organic copper alloy material having improved manufacturability and a method of manufacturing the same.

Materials for organic application include various materials such as stainless steel, aluminum, and plastic. Among them, especially organic antimicrobial and luxurious colors are popular with consumers as comics, raising and watering supplies. In this regard, organic products made of conventional copper alloy materials including brass, white copper, and the like have appeared as a substitute for organic waste. However, organic products using these existing copper alloy materials are not satisfactory to consumers because of differences in color as compared to organic ones.

The organics are made of brass (Cu) and tin (Sn) at a weight ratio of 78:22, which is made by burning a brick with fire and tapping it with a hammer. On the other hand, casting organic is a method of making pottery by pouring dregs into a certain frame, and semi-fermented organic is an organic manufactured by making a basic shape first as a casting and then completing a specific shape by a dicing technique. Due to the differences in the manufacturing method, the casting organic can be produced by two persons or a small number of people, while the organic waste is produced by various processes such as dissolution → nematidy → mulching → smelting → dipping → silage and quenching → , So a large number of people and skilled skill are required.

A skilled artisan is required in the manufacture of organic materials because cracks easily occur because of the formation of the δ phase which causes brittleness when the Sn content is increased in the copper alloy. Therefore, it is necessary to repeat the process of minimum processing at 620 to 800 ° C in the presence of the β phase so as not to cause cracking during the manufacturing process, and then to heat and re-process it. It is difficult to perform unless you are a professional.

However, since the content of tin (Sn) in the conventional copper alloy material used in the manufacture of the fired organic material is 22% by weight, it is preferable that the high tin Cracks easily occur due to the brittleness caused by the content. Therefore, it is necessary to repeat the step of machining with minimum processing in the β-phase range capable of hot working, and then the step of processing by heat treatment again. It is difficult copper alloy material.

Therefore, the present invention provides a copper alloy material for an organic (brass unit) and a method for manufacturing the same, which can be easily processed in the manufacturing process and can reduce the manufacturing cost while retaining the same characteristics as the conventional green and brown color I would like to.

In order to achieve the above object, an organic copper alloy material according to the present invention comprises 5.0 to 15.0% by weight of zinc (Zn), 5.0 to 15.0% by weight of nickel (Ni), 1.0 to 5.0% by weight of tin (Sn) To 3.0% by weight, the amount of copper (Cu) remaining, and unavoidable impurities. The inevitable impurities are selected from phosphorus (P), silicon (Si), magnesium (Mg), calcium (Ca), sodium (Na), aluminum (Al), manganese (Mn) The total amount of impurities inevitable in the material is 1.5 wt% or less. Further, the color value of the copper alloy material is L *: 82 to 89, a *: 1.5 to 4.5, and b *: 9.7 to 13.0 as L * a * b * color values.

Wherein the organic copper alloy material comprises 5.0 to 15.0% by weight of zinc (Zn), 5.0 to 15.0% by weight of nickel, 1.0 to 5.0% by weight of tin, 0.5 to 3.0% by weight of iron, 0.5 to 3.0% Casting the ingot by preparing it with the composition of the remainder portion and unavoidable impurities, hot working at 700 to 900 占 폚, cold working at 10 to 95% of machining degree, annealing at 300 to 900 占 폚 annealing and annealing. The inevitable impurities are selected from phosphorus (P), silicon (Si), magnesium (Mg), calcium (Ca), sodium (Na), aluminum (Al), manganese (Mn) The total amount of impurities inevitable in the material is 1.5 wt% or less. And a stress relaxation treatment step after the annealing heat treatment step.

The present invention also relates to an organic product made of the organic copper alloy material.

The copper alloy material for an organic brass material according to the present invention has color and strength characteristics equivalent to those of brass (copper (Cu) 78 wt% and tin (Sn) 22 wt% Cracks are not generated during hot working, and the mass production is facilitated. Further, the organic copper alloy material according to the present invention is excellent in cold workability after heat treatment, and satisfies the characteristics required for manufacturing such as drawing, elongation, and heat treatment, Instead of the material, it can be used for various household goods including musical instruments, tableware, life cooking utensils, life ornaments and the like.

Organic solvent Copper alloy material

The present invention relates to an organic copper alloy material which exhibits a hue equivalent to that of an organic material and which is excellent in workability in manufacturing.

The organic copper alloy material according to the present invention contains 5.0-15.0 wt% of zinc (Zn), 5.0-15.0 wt% of nickel, 1.0-5.0 wt% of tin (Sn), 0.5-3.0 wt% of iron (Fe ), Copper (Cu) and other unavoidable impurities.

In the copper alloy material, zinc (Zn) and nickel (Ni) serve to complement strength, elasticity and corrosion resistance. When zinc is contained in an amount of less than 5.0% by weight, it becomes reddish color. When zinc is contained in an amount of more than 15.0% by weight, it is an excessively bright white, It is disadvantageous in that it is difficult to implement and the strength is excessively increased to lower the cold working degree. The nickel is an element capable of improving strength and color, and is an element improving the corrosion resistance. If the amount of nickel is less than 5.0 wt%, discoloration occurs in a humid atmosphere. If the amount of nickel is more than 15.0 wt%, the color of the final alloy is changed to an excessively bright white and the raw material cost is increased.

In the copper alloy material, tin (Sn) improves the corrosion resistance together with nickel (Ni), realizes a hue unique to greenery, and improves wear resistance. When the content is less than 1.0% by weight, color and abrasion resistance, There is a disadvantage in that the discoloration resistance is lowered, and when it is contained in an amount of more than 5.0% by weight, it is disadvantageous that brittleness is caused in hot working.

Iron (Fe) is an alloy element which improves strength and improves corrosion resistance together with nickel (Ni). If it is contained in an amount of less than 0.5% by weight, it is not effective in improving corrosion resistance. Which is disadvantageous because it can lower the fluidity of the molten metal and generate bubbles in the ingot.

In this specification, inevitable impurities include impurities such as phosphorus (P), silicon (Si), magnesium (Mg), calcium (Ca), sodium (Na), aluminum (Al), manganese The additive element used for increasing the flowability of the molten metal is inevitably added in the manufacturing process, but if the total amount is 1.5% by weight or less, the characteristics of the produced organic copper alloy material are not affected.

The organic copper alloy material according to the present invention having the above-described composition realizes a color equivalent to that of the conventional organic waste. This color can be evaluated as a color difference meter. An example of the color difference meter is an L * a * b * color difference meter.

In addition, the copper alloy material according to the present invention is excellent in corrosion resistance properties by reducing the amount of tin in order to realize the corrosion resistance and discoloration resistance equivalent to those of conventional organic copper alloy materials, and adding zinc (Zn) and nickel (Ni) instead.

On the other hand, the conventional baked organic material has excellent strength and antibacterial property, but the hot workability is very poor due to high tin content. On the other hand, the organic copper alloy material according to the present invention has excellent hot workability and cold workability of about 95% And excellent antimicrobial property of the copper alloy material is maintained.

Manufacturing method of organic copper alloy material

The above-described fake organic copper alloy material can be produced by the following production method: casting an ingot by preparing a molten metal according to the above-described composition ratio, heating at a temperature of 700 to 900 占 폚 for 1 second to 1 hour A step of cold working at a processing rate of 10 to 95%, and a step of annealing annealing at a temperature range of 300 to 900 ° C.

(Ni), 1.0 to 5.0 wt% of tin (Sn), 0.5 to 3.0 wt% of iron (Fe), and 0.01 to 5 wt% of zinc (Zn) And the molten copper is produced with the remaining amount of copper (Cu). The melting temperature is 1200 to 1350 占 폚. At this time, phosphorus (P), silicon (Si), magnesium (Mg), calcium (Ca), sodium (Na), aluminum (Al), manganese (Mn) and the like are added as a deoxidizing agent And the total amount thereof is not more than 1.5% by weight. The ingot is cast with the molten metal.

Then, the ingot obtained in the above step is hot-worked at a temperature range of 700 to 900 ° C. The hot working is difficult to process at a temperature lower than 700 ° C, and there is a possibility of causing cracks. At a temperature higher than 900 ° C, there is a possibility that the ingot will dissolve because it is near melting point. The hot working time can be determined by a person skilled in the art according to the hot working form, for example, ranging from 1 second to 1 hour.

Next, the workpiece obtained in the above step is cold-worked at a room temperature and in a range of 10 to 95% in the degree of processing. Thereafter, the workpiece obtained in the above step is annealed in a temperature range of 300 to 900 ° C. An annealing heat treatment may be performed in an oxidation-preventing atmosphere for 30 minutes to 15 hours, or an annealing heat treatment may be performed while continuously passing the plate material for 20 seconds to 180 seconds. The cold working and annealing heat treatment steps may be repeatedly performed as needed.

Further, stress relaxation treatment may be additionally performed after the annealing heat treatment.

On the other hand, in the conventional organic copper alloy material, the α + δ phase inducing brittleness in the ingot state exists in the crystal grain boundaries and the grain boundaries in a size of about 100 μm, causing grain boundary separation during hot working. However, since the content of tin (Sn) in the organic copper alloy material according to the present invention is limited to the range of 1.0 to 5.0 wt%, almost no such α + δ phase is produced during the manufacturing process. That is, in the organic copper alloy material according to the present invention, the phase + + delta phase is very small compared with that in the conventional manufacture of organic waste, and even if it is produced, the size is only 2 mu m or less. Therefore, the copper alloy material according to the present invention described above does not cause brittleness during hot working, and at the same time, has excellent cold workability. Therefore, there is no need for a special processing method of craftsmen, which was required in the conventional manufacture of organic waste, and the application of general hot working and cold working methods also makes it possible to produce organic copper alloy materials Mass production of products is possible.

Utilization of organic copper alloy material according to the present invention

The organic copper alloy material according to the present invention can be applied to a variety of daily necessities conventionally used in the field of frying since the manufacturing method is very simple and mass-producible and exhibits properties equivalent to those of conventional frying. Especially, it is not only used as a luxury dishware and a raising product but also widely used for household appliances such as cooking utensils such as a fireplace, a fireplace, a fireplace, a frying pan, a kettle, a kettle, a shabu do.

Hereinafter, the present invention will be described through the following examples, but the present invention is not limited to the following examples.

Example

Example  One

10 kg of nickel (Ni), 5.0 wt% of zinc (Zn), 1.0 wt% of tin (Sn) and 1.0 wt of iron (Fe) were weighed in a graphite crucible having an inner diameter of 100 mm by using a high frequency induction furnace. %.

The dissolution temperature was determined by first dissolving nickel (Ni), copper (Cu), and iron (Fe) having high melting points at a temperature of 1200 to 1350 ° C, lowering the temperature to near 1200 ° C, (Si), magnesium (Mg), calcium (Ca), sodium (Na), aluminum (Al) and manganese (Mn) as a deoxidizer are dissolved in a total amount of 1.0 (Molten metal preparation step), and a molten metal was injected into the graphite mold to prepare an ingot having a thickness of 30 mm and a width of 70 mm (the ingot casting was carried out at a temperature of 1100 to 1200 ° C) for 5 to 10 minutes step). In order to minimize the oxidation of the molten metal, 0.01 wt% of deoxidizing agent (CB-Al-Mg- etc.) was added to the surface of the molten metal to completely cover the surface of the molten metal, 20 g of borax-based Na ₂ B ₄ O ₇ ) was added, followed by degassing treatment (1 minute).

The obtained ingot was held at 700 to 900 DEG C for 2 hours and then hot-rolled. Subsequently, the obtained hot-rolled ingot was subjected to surface heat treatment at a temperature of 800 ° C. for one hour after removing the scale of the surface by means of sawing, followed by cold rolling at 70% processing. Followed by a final 70% cold rolling. In order to facilitate post-processing, a sample was obtained in the form of a plate having a thickness of 4 mm, a width of 210 mm, and a length of 297 mm by annealing at 800 ° C for 1 hour.

Example  2 to 14

An ingot having a thickness of 30 mm and a width of 70 mm was obtained in the same manner as in Example 1 except that the composition shown in Table 1 was used. A plate material sample was prepared in the same manner.

Comparative Example  One

Ingot of Cu of 78% by weight and Sn of 22% by weight was obtained according to the conventional method of producing organic waste. In Comparative Example 1, the plate-shaped sample could not be produced due to cracking.

Comparative Example  2 to 4

In Comparative Examples 2 to 4, ingots were obtained in the same manner as in Example 1, with the compositions shown in Table 1, and then plate samples were produced in the same way as in Example 1.

division ingredient ingot
(Hv, 3 kg) Color difference meter Remarks Cu Zn Ni Sn Fe L * a * b * One Remainder 10 5 One One 92 88.71 3.53 12.85 Example 1 2 Remainder 5 15 2.5 2 115 85.67 3.94 12.02 Example 2 3 Remainder 5 10 3 3 108 85.15 3.64 11.82 Example 3 4 Remainder 5 5 5 0.5 89 87.55 3.59 12.44 Example 4 5 Remainder 5 5 One 0.5 82 86.52 3.08 11.76 Example 5 6 Remainder 5 7 3 One 88 86.81 3.39 10.64 Example 6 7 Remainder 8 6 3.5 1.5 93 87.03 2.48 11.54 Example 7 8 Remainder 8 6 5 2 104 87.52 2.35 11.07 Example 8 9 Remainder 8 7 4 2.5 102 87.24 1.52 10.51 Example 9 10 Remainder 8 8 One 3 101 86.56 1.59 9.83 Example 10 11 Remainder 8 8 2.5 One 99 84.17 2.18 10.95 Example 11 12 Remainder 10 10 1.5 2 123 86.35 1.79 9.87 Example 12 13 Remainder 14 14 One One 134 87.27 2.21 10.67 Example 13 14 Remainder 12 10 2.5 1.5 123 87.56 2.71 10.45 Example 14 15 Remainder - - 22 - 103 85.87 2.26 10.68 Comparative Example 1 16 Remainder 3 5 3 - 100 83.68 5.71 11.02 Comparative Example 2 17 Remainder - 10 - One 82 84.8 4.54 8.75 Comparative Example 3 18 Remainder 3 6 6 4 98 85.23 4.82 10.83 Comparative Example 4

Table 1 shows the composition ratios of Examples and Comparative Examples and the L * a * b * values, which are the hardness and colorimetric system. The hardness was measured by the KS B 0811: 2003 standard test method using Vickers ' s hardness in the ingots obtained in each of the examples and the comparative examples. In order to confirm the hue of the copper alloy material produced according to Examples and Comparative Examples, the L * a * b * value was examined using a colorimeter for samples of the plate material form obtained in each of Examples and Comparative Examples.

The Vickers hardness of the organic copper alloy material according to the present invention was found to be 82 ~ 134Hv (3kg) when measured against the ingot, which can be improved up to 250Hv (3kg) in the final copper alloy material by subsequent processing.

The colorimetric value of the organic copper alloy material according to the present invention is in the range of L *: 82 to 89, a *: 1.5 to 4.5, b *: 9.7 to 13.0, .

Claims (7)

(Fe), 0.5 to 3.0% by weight of iron (Fe), the balance of copper (Cu), and the balance of copper An organic copper alloy material comprising an inevitable impurity. The method according to claim 1,
The inevitable impurities are selected from phosphorus (P), silicon (Si), magnesium (Mg), calcium (Ca), sodium (Na), aluminum (Al), manganese (Mn) Wherein the total amount of impurities inevitable in the material is 1.5 wt% or less. The method according to claim 1,
Wherein the color of the copper alloy material is L *: 82 to 89, a *: 1.5 to 4.5, and b *: 9.7 to 13.0 as L * a * b * color values. Wherein the molten metal is selected from the group consisting of 5.0 to 15.0% by weight of zinc, 5.0 to 15.0% by weight of nickel, 1.0 to 5.0% by weight of tin, 0.5 to 3.0% by weight of iron, A casting of the ingot by preparing it in the form of a composition of impurities and inevitable impurities, a step of hot working in the range of 700 to 900 ° C, a step of cold working of 10 to 95% in the machining degree, an annealing heat treatment in the range of 300 to 900 ° C Wherein the organic copper alloy material is a metal alloy. 5. The method of claim 4,
The inevitable impurities are selected from phosphorus (P), silicon (Si), magnesium (Mg), calcium (Ca), sodium (Na), aluminum (Al), manganese (Mn) Wherein the total amount of impurities inevitable in the material is 1.5 wt% or less. 5. The method of claim 4,
Further comprising a stress relaxation treatment step after the annealing heat treatment step. An organic product made from the organic copper alloy material according to any one of claims 1 to 3.