KR20160142021A - Cutting method of unleaded brass alloy - Google Patents
Cutting method of unleaded brass alloy Download PDFInfo
- Publication number
- KR20160142021A KR20160142021A KR1020150077801A KR20150077801A KR20160142021A KR 20160142021 A KR20160142021 A KR 20160142021A KR 1020150077801 A KR1020150077801 A KR 1020150077801A KR 20150077801 A KR20150077801 A KR 20150077801A KR 20160142021 A KR20160142021 A KR 20160142021A
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- annealing
- lead
- brass alloy
- temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P17/00—Metal-working operations, not covered by a single other subclass or another group in this subclass
- B23P17/02—Single metal-working processes; Machines or apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
The present invention relates to a process for cutting a lead-free brass alloy to improve processability, crack resistance, abrasion resistance and corrosion resistance of brass alloys of the C2600, C2700, C2800 and C4600 series containing lead components which do not adversely affect the human body or the environment (S11) for forging a brass alloy raw material of C2600, C2700, C2800, and C4600 series having a lead content of 0.005 to 0.25%; A second step (S12) of performing full annealing of the forged material through the first step (S11) at a temperature of 400 to 720 占 폚 for 3 hours; A third step (S13) of machining the fully annealed material through the second step; And a fourth step (S14) of soft annealing the machined workpiece at a temperature of 300 to 450 DEG C for 1 hour through the third step.
Description
More particularly, the present invention relates to a process for machining brass alloys of C2600, C2700, C2800, and C4600 series containing lead components that do not adversely affect the human body or the environment, To a method of cutting a lead-free brass alloy to improve abrasion resistance and corrosion resistance.
In general, it is known that copper alloys are effective for improving machinability and corrosion resistance by adding lead.
However, when a copper alloy containing lead is manufactured, it contains lead which adversely affects the human body and the environment. Therefore, when the worker sucks lead in the metal vapor generated during melting and casting of the alloy, In the case of a piping member to be used, there is always a risk that the lead component is eluted by contact with the drinking water and absorbed into the human body.
Accordingly, in order to solve such a problem, the applicant of the present invention discloses a heat treatment method of lead-free brass.
The above-mentioned technology is to provide a lead-free solder which is excellent in machinability, corrosion resistance and abrasion resistance without addition of a component for improving workability and containing very small amount of lead which does not contain lead which is harmful to humans or the environment or which does not adversely affect human body or environment. This is a technique that improves cracking.
Applicants have finally developed a heat treatment method for brass alloys of C2600, C2700, C2800 and C4600 series containing very small amounts of lead, which does not adversely affect the human body, while studying the technique for the heat treatment of lead-free brass.
The object of the present invention is to provide a process for producing a brass alloy of C2600, C2700, C2800, and C4600 series containing a lead component which does not adversely affect the human body or the environment, And a method of cutting a lead-free brass alloy to improve corrosion resistance.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a method of manufacturing a brass alloy, comprising the steps of: forging a brass alloy raw material of C2600, C2700, C2800, and C4600 series having a lead content of 0.005 to 0.25% A second step of performing full annealing of the forged material through the first step at a temperature of 400 to 720 DEG C for 3 hours; A third step (S13) of machining the fully annealed material through the second step; And a fourth step of soft annealing the machined workpiece at a temperature of 300 to 450 DEG C for 1 hour through the third step.
The present invention also relates to a method for manufacturing a brass alloy including a first step of full annealing a brass alloy raw material of a C2600, C2700, C2800, C4600 series having a lead content of 0.005 to 0.25% at a temperature of 400 to 720 占 폚 for 3 hours; A second step of machining the fully annealed material through the first step; And a third step of soft annealing the machined workpiece at a temperature of 300 to 450 ° C for 1 hour through the second step.
Further, according to the present invention, the pull annealing or soft annealing operation is performed in a nitrogen gas atmosphere.
As described above, the present invention improves the workability, crack resistance, abrasion resistance and corrosion resistance of the brass alloys of C2600, C2700, C2800, and C4600 series containing lead components that do not adversely affect the human body or the environment. It offers the advantage that the processability of brass compared to brass is improved by 70 ~ 80%.
FIG. 1 is a flow chart illustrating a procedure of a process according to the first embodiment of the present invention,
2 is a flow chart of the process according to the second embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.
1 is a flow chart of a process according to the first embodiment of the present invention.
As shown in the drawings, the method of cutting a lead-free brass alloy according to the first embodiment of the present invention includes:
A first step S11 of forging a brass alloy raw material of C2600, C2700, C2800 and C4600 series, a second step S12 of pull-annealing the forged material through the first step S11, A third step (S13) of machining the fully annealed material through the second step, and a fourth step (S14) of soft annealing the material machined through the third step.
More specifically, the first step (S11) is a step for forging the brass alloy raw material of C2600, C2700, C2800, and C4600 series,
The brass alloys of the C2600, C2700, C2800, and C4600 series contain 0.005 to 0.25% of lead, which is a lead component that does not adversely affect the human body or the environment.
The second step (S12) is a step of pull annealing the forged material through the first step (S11). The forged material is subjected to full annealing at a temperature of 400 to 720 DEG C for 3 hours.
The material thus improves machinability and eliminates stress and boundary cracks due to external forces during heating and forging of the metal.
The third step (S13) is a step of machining the fully annealed material through the second step, for example, a step of processing into a desired pipe fitting product.
The fourth step (S14) is a step of soft annealing the workpiece machined through the third step, and the machined workpiece is soft annealed at a temperature of 300 to 450 DEG C for 1 hour.
Therefore, the material of the product concentrates stress due to machining and removes the residual stress, thereby improving crack prevention, abrasion resistance and corrosion resistance.
2 is a flow chart of the process according to the second embodiment of the present invention.
As shown in the drawing, in a method of cutting a lead-free brass alloy according to the second embodiment of the present invention,
A first step (S21) of full annealing a brass alloy raw material of C2600, C2700, C2800 and C4600 series, a second step (S22) of machining a fully annealed material through the first step, And a third step (S31) of soft annealing the machined material through the process.
More specifically, in the first step (S21), the brass alloy raw material of the C2600, C2700, C2800, and C4600 series is fully annealed. The forged material is subjected to full annealing at a temperature of 400 to 720 DEG C for 3 hours give.
The material thus improves machinability and eliminates stress and boundary cracks due to external forces during heating and forging of the metal.
The second step (S22) is a step of machining the fully annealed material through the first step (S21), for example, a step of processing into a desired pipe fitting product.
The third step (S23) is a step of soft annealing the workpiece machined through the second step. The machined workpiece is subjected to soft annealing at a temperature of 300 to 450 ° C for one hour.
Therefore, the material of the product concentrates stress due to machining and removes the residual stress, thereby improving crack prevention, abrasion resistance and corrosion resistance.
Further, according to the processing method of the present invention, full or soft annealing is performed under the above-mentioned temperature and time conditions in a nitrogen gas atmosphere. As a result, cracks and aging that may occur in the metal structure after forging or machining, It has been confirmed that the corrosion phenomenon is prevented.
In addition, when comparing the processed product according to the cutting method of the present invention with the unprocessed product, the degree of corrosion of the raw material before the full annealing was high, but the degree of corrosion of the raw material after the annealing was relatively small.
In other words, as the corrosion progresses, the raw material structure is broken up much. The shape of the raw material structure after annealing is less than that before annealing, so that the corrosion resistance of the raw material is improved by the cutting method according to the present invention. I know.
Claims (4)
A second step (S12) of performing full annealing of the forged material through the first step (S11) at a temperature of 400 to 720 占 폚 for 3 hours;
A third step (S13) of machining the fully annealed material through the second step; And
And a fourth step (S14) of soft annealing the machined workpiece at a temperature of 300 to 450 DEG C for 1 hour through the third step (S14).
Wherein the pull annealing or soft annealing operation is performed in a nitrogen gas atmosphere.
A second step (S22) of machining the fully annealed material through the first step; And
And a third step (S31) of soft annealing the machined workpiece at a temperature of 300 to 450 DEG C for 1 hour through the second step.
Wherein the pull annealing or soft annealing operation is performed in a nitrogen gas atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150077801A KR20160142021A (en) | 2015-06-02 | 2015-06-02 | Cutting method of unleaded brass alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150077801A KR20160142021A (en) | 2015-06-02 | 2015-06-02 | Cutting method of unleaded brass alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20160142021A true KR20160142021A (en) | 2016-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150077801A KR20160142021A (en) | 2015-06-02 | 2015-06-02 | Cutting method of unleaded brass alloy |
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| KR (1) | KR20160142021A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101216019B1 (en) | 2010-12-29 | 2012-12-28 | 주식회사 아세아유니온 | Heat Treatment Method of Unleaded Brass Alloy |
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- 2015-06-02 KR KR1020150077801A patent/KR20160142021A/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101216019B1 (en) | 2010-12-29 | 2012-12-28 | 주식회사 아세아유니온 | Heat Treatment Method of Unleaded Brass Alloy |
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