CN107138551A - The preparation method of LED down-lead bracket brass strips - Google Patents
The preparation method of LED down-lead bracket brass strips Download PDFInfo
- Publication number
- CN107138551A CN107138551A CN201710327956.6A CN201710327956A CN107138551A CN 107138551 A CN107138551 A CN 107138551A CN 201710327956 A CN201710327956 A CN 201710327956A CN 107138551 A CN107138551 A CN 107138551A
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- CN
- China
- Prior art keywords
- annealing temperature
- recrystallization annealing
- rolling
- work
- softening
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/04—Alloys based on copper with zinc as the next major constituent
-
- 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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
-
- 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
Abstract
The invention belongs to the preparation method of field of new materials, specially LED down-lead bracket brass strips.The present invention is by C2680 alloy melting Foundry Production ingot castings, by being heated to the hot rolling of the recrystallization temperature above, removing surface oxide layer, cold rolling, annealing, cold rolling, annealing, cold rolling, annealing, finished product strip-rolling, cleaning, straightening, the band of production has high surface quality, higher surface smoothness and extremely low surface roughness value.This method selects appropriate system of heat treatment process and Annealing Protection atmosphere, coordinates appropriate roll grinding processes, realizes and eliminates the dezincification of band surface oxidation, reduction surface roughness value, with technique it is simple, inexpensive, it is free from environmental pollution the characteristics of.
Description
Technical field
The invention belongs to the preparation method of field of new materials, specially LED down-lead bracket brass strips.
Background technology
LED down-lead bracket brass strips have high intensity, best bright finish, low roughness, easily plating and it is excellent plus
Work characteristic etc., there is huge market potential in fields such as LED industry, down-lead brackets.
At present, 0.30 μm of the surface roughness Ra ＞ of domestic brass strips product, it is impossible to meet LED industry, down-lead bracket
Plating packaging technology requirement.Brass strips preparation method is mainly using founding, hot rolling, cold rolling, heat treatment and finishing production work
Skill flow.Down-lead bracket is with brass strips product in downstream in use, not requiring nothing more than mechanical performance, physical property, surface cleaning
Degree, it is also extremely harsh to product surface roughness requirements（0.15 μm of Ra ＜ or 0.1 μm of Ra ＜）, it is desirable to must not occur after plating
The surface quality problems such as pockmark, bubble.
The content of the invention：
It is an object of the invention to control Annealing Protection gas oxygen content, by twice（390 DEG C or 370 DEG C）Cryogenic re-crystallisation is moved back
Fire, with the use of appropriate gloss level of roll etc., using founding-hot rolling-milling face-cold rolling-heat treatment-cold rolling-finishing process stream
Journey, realizes the preparation of LED down-lead bracket brass strips, solves oxidation stain, dezincification pockmark that strip surface is present and thick
The problems such as rugosity value is high.
The present invention adopts the following technical scheme that realization：The preparation method of LED down-lead bracket brass strips, bag
Include following steps：
（1）By C2680 alloy melting Foundry Production ingot castings；
（2）Hot rolling：880-910 DEG C of start temperature, end temperature >=500 DEG C；
（3）Milling face：Remove surface oxide layer；
（4）It is cold rolling；
（5）Annealing：Soften 430 DEG C of recrystallization annealing temperature, soaking time 6h, the micro- oxygen content≤3ppm of protection gas；
（6）It is cold rolling；
（7）Annealing：Soften 390 DEG C or 370 DEG C of recrystallization annealing temperature, soaking time 6h, the micro- oxygen content≤3ppm of protection gas；
（8）It is cold rolling：Work as step（7）When middle softening recrystallization annealing temperature is 390 DEG C, gloss level of roll control 0.25 μm~
0.30 μm, work as step（7）When middle softening recrystallization annealing temperature is 370 DEG C, gloss level of roll is controlled at 0.15 μm~0.20 μm
Between；
（9）Annealing：Work as step（8）Middle gloss level of roll control is at 0.25 μm~0.30 μm, softening recrystallization annealing temperature 390
DEG C, work as step（8）Middle gloss level of roll control is at 0.15 μm~0.20 μm, 370 DEG C of softening recrystallization annealing temperature, insulation
Time 6h, the micro- oxygen content≤3ppm of protection gas；
（10）Finished product strip-rolling is rolled：Work as step（9）When middle softening recrystallization annealing temperature is 390 DEG C, gloss level of roll control
At 0.1 μm -0.15 μm, work as step（9）When middle softening recrystallization annealing temperature is 370 DEG C, gloss level of roll is controlled at 0.08 μm
Between~0.10 μm；
（11）Cleaning, straightening.
The preparation method of above-mentioned LED down-lead bracket brass strips, C2680 alloying components, which are matched, is：Cu：64.0-
68.5%；Fe≤0.05%；Pb≤0.09%；Zn surpluses；Impurity summation≤0.45%.
Have the advantage that compared with prior art and good effect：This method is from appropriate system of heat treatment process and moves back
Fiery protective atmosphere, coordinates appropriate roll grinding processes, realizes and eliminates the dezincification of band surface oxidation, reduction surface roughness value,
With technique it is simple, inexpensive, it is free from environmental pollution the characteristics of.The strip surface No oxidation discoloration produced, no dezincification pockmark（It is micro-
The lower 100 times of observations of mirror）, surface roughness is extremely low, using the LED down-lead bracket surface of plating packaging technology production without pit gas
Bubble, intensity is high, and thermal diffusivity is good, and production cost is low, and cost performance is high, it is possible to achieve the production of high-precision LED down-lead bracket.
Brief description of the drawings
Fig. 1 is the process chart of the present invention.
Embodiment
Embodiment one：
According to composition（Cu：64.0-68.5%；Fe≤0.05%；Pb≤0.09%；Zn surpluses；Impurity summation≤0.45%；）Proportioning system
Ingot casting is made, through 890 DEG C of hot rollings, strip plate after rolling（16mm）；It is cold-rolled to 2.0mm thickness and carries out recrystallization softening annealing（430 DEG C, 6h）,
Micro- oxygen content≤the 3ppm of ammonolysis craft protection gas；Carry out being cold-rolled to 0.58mm thickness progress recrystallization softening annealing again（390 DEG C, 6h）,
Micro- oxygen content≤the 3ppm of ammonolysis craft protection gas；It is cold-rolled to preform thickness 0.24mm again, 0.25 μm of preform gloss level of roll-
0.3 μm, the surface roughness of preform is 0.257 μm -0.293 μm；Preform recrystallization softening is annealed（390 DEG C, 6h）, ammonia
Micro- oxygen content≤the 3ppm of decomposing protection gas, grain size is reduced to 0.01；Carry out finished product and be rolled down to 0.2mm thickness, finished product rolling is used
Roll surface roughness be 0.1 μm -0.15 μm, rolling finished surface roughness is 0.118 μm -0.145 μm；Enter
Row straightening improves template, carries out surface cleaning processing, obtains band finished product.
Embodiment two：
According to composition（Cu：64.0-68.5%；Fe≤0.05%；Pb≤0.09%；Zn surpluses；Impurity summation≤0.45%；）Proportioning system
Ingot casting is made, through 890 DEG C of hot rollings, strip plate after rolling（16mm）；It is cold-rolled to 2.0mm thickness and carries out recrystallization softening annealing（430 DEG C, 6h）,
Micro- oxygen content≤the 3ppm of ammonolysis craft protection gas；Carry out being cold-rolled to 0.58mm thickness progress recrystallization softening annealing again（370 DEG C, 6h）,
Micro- oxygen content≤the 3ppm of ammonolysis craft protection gas；Preform thickness 0.24mm thickness is cold-rolled to again, and what preform was used when rolling rolls
Roll surface roughness is 0.15 μm -0.2 μm, obtains 0.151 μm -0.181 μm of preform surface roughness；Preform is recrystallized
Soft annealing（370 DEG C, 6h）, grain size is reduced to 0.008, the micro- oxygen content≤3ppm of ammonolysis craft protection gas；Carry out finished product rolling
To 0.2mm, polishing roll surface roughness is 0.08 μm -0.1 μm, and the finished surface for obtaining 0.083 μm -0.097 μm is coarse
Degree；Carrying out straightening improves template, carries out surface cleaning processing, obtains band finished product.
The equipment that this method is used includes：Casting furnace group, walking-beam furnace hot-rolling mill, Double Milling, cold-rolling mill, annealing furnace, cleaning
Line and withdrawal straightening machine.
Claims (2)
- The preparation method of 1.LED lamp lead support brass strips, it is characterised in that comprise the following steps：（1）By C2680 alloy melting Foundry Production ingot castings；（2）Hot rolling：880-910 DEG C of start temperature, end temperature >=500 DEG C；（3）Milling face：Remove surface oxide layer；（4）It is cold rolling；（5）Annealing：Soften 430 DEG C of recrystallization annealing temperature, soaking time 6h, the micro- oxygen content≤3ppm of protection gas；（6）It is cold rolling；（7）Annealing：Soften 390 DEG C or 370 DEG C of recrystallization annealing temperature, soaking time 6h, the micro- oxygen content≤3ppm of protection gas；（8）It is cold rolling：Work as step（7）When middle softening recrystallization annealing temperature is 390 DEG C, gloss level of roll control 0.25 μm~ 0.30 μm, work as step（7）When middle softening recrystallization annealing temperature is 370 DEG C, gloss level of roll is controlled at 0.15 μm~0.20 μm Between；（9）Annealing：Work as step（8）Middle gloss level of roll control is at 0.25 μm~0.30 μm, softening recrystallization annealing temperature 390 DEG C, work as step（8）Middle gloss level of roll control is at 0.15 μm~0.20 μm, 370 DEG C of softening recrystallization annealing temperature, insulation Time 6h, the micro- oxygen content≤3ppm of protection gas；（10）Finished product strip-rolling is rolled：Work as step（9）When middle softening recrystallization annealing temperature is 390 DEG C, gloss level of roll control At 0.1 μm -0.15 μm, work as step（9）When middle softening recrystallization annealing temperature is 370 DEG C, gloss level of roll is controlled at 0.08 μm Between~0.10 μm；（11）Cleaning, straightening.
- 2. the preparation method of LED down-lead bracket brass strips according to claim 1, it is characterised in that C2680 is closed Golden composition proportion is：Cu：64.0-68.5%；Fe≤0.05%；Pb≤0.09%；Zn surpluses；Impurity summation≤0.45%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710327956.6A CN107138551A (en) | 2017-05-11 | 2017-05-11 | The preparation method of LED down-lead bracket brass strips |
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| CN201710327956.6A CN107138551A (en) | 2017-05-11 | 2017-05-11 | The preparation method of LED down-lead bracket brass strips |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110052897A (en) * | 2019-04-11 | 2019-07-26 | 安徽众源新材料股份有限公司 | The processing technology of ultrasonic bonding copper strips |
| CN110684911A (en) * | 2018-07-04 | 2020-01-14 | 有研工程技术研究院有限公司 | Cathode material of hollow cathode zinc lamp and preparation method thereof |
| CN113083897A (en) * | 2021-04-07 | 2021-07-09 | 太原晋西春雷铜业有限公司 | Preparation method of high-uniformity surface of copper or copper alloy strip |
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| JPS63171860A (en) * | 1987-01-09 | 1988-07-15 | Kobe Steel Ltd | Brass or red brass product free from heat discoloration and its production |
| CN103700641A (en) * | 2013-11-29 | 2014-04-02 | 武汉钢铁(集团)公司 | Steel strip for lead frame and production method thereof |
| CN104372274A (en) * | 2014-10-09 | 2015-02-25 | 安徽鑫科新材料股份有限公司 | Processing technology for elimination of roll marks on surface of zinc-copper-nickel alloy strip |
| CN104630540A (en) * | 2013-11-08 | 2015-05-20 | 青岛宏泰铜业有限公司 | KFC leading frame copper alloy strip production technology |
| CN104726744A (en) * | 2015-03-17 | 2015-06-24 | 太原晋西春雷铜业有限公司 | Copper alloy frame material strip for etching and preparation method of strip |
| CN104988351A (en) * | 2015-07-31 | 2015-10-21 | 中色奥博特铜铝业有限公司 | Brass strip for button and manufacturing method thereof |
| CN105088257A (en) * | 2015-09-02 | 2015-11-25 | 宁波兴业盛泰集团有限公司 | Method for lowering surface roughness of lead frame material |
-
2017
- 2017-05-11 CN CN201710327956.6A patent/CN107138551A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63171860A (en) * | 1987-01-09 | 1988-07-15 | Kobe Steel Ltd | Brass or red brass product free from heat discoloration and its production |
| CN104630540A (en) * | 2013-11-08 | 2015-05-20 | 青岛宏泰铜业有限公司 | KFC leading frame copper alloy strip production technology |
| CN103700641A (en) * | 2013-11-29 | 2014-04-02 | 武汉钢铁(集团)公司 | Steel strip for lead frame and production method thereof |
| CN104372274A (en) * | 2014-10-09 | 2015-02-25 | 安徽鑫科新材料股份有限公司 | Processing technology for elimination of roll marks on surface of zinc-copper-nickel alloy strip |
| CN104726744A (en) * | 2015-03-17 | 2015-06-24 | 太原晋西春雷铜业有限公司 | Copper alloy frame material strip for etching and preparation method of strip |
| CN104988351A (en) * | 2015-07-31 | 2015-10-21 | 中色奥博特铜铝业有限公司 | Brass strip for button and manufacturing method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110684911A (en) * | 2018-07-04 | 2020-01-14 | 有研工程技术研究院有限公司 | Cathode material of hollow cathode zinc lamp and preparation method thereof |
| CN110052897A (en) * | 2019-04-11 | 2019-07-26 | 安徽众源新材料股份有限公司 | The processing technology of ultrasonic bonding copper strips |
| CN113083897A (en) * | 2021-04-07 | 2021-07-09 | 太原晋西春雷铜业有限公司 | Preparation method of high-uniformity surface of copper or copper alloy strip |
| CN113083897B (en) * | 2021-04-07 | 2022-12-27 | 太原晋西春雷铜业有限公司 | Preparation method of high-uniformity surface of copper or copper alloy strip |
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Application publication date: 20170908 |