WO2017008430A1 - 一种宽幅超薄的纯金箔带及其制造方法 - Google Patents

一种宽幅超薄的纯金箔带及其制造方法 Download PDF

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Publication number
WO2017008430A1
WO2017008430A1 PCT/CN2015/096442 CN2015096442W WO2017008430A1 WO 2017008430 A1 WO2017008430 A1 WO 2017008430A1 CN 2015096442 W CN2015096442 W CN 2015096442W WO 2017008430 A1 WO2017008430 A1 WO 2017008430A1
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Prior art keywords
rolling
gold
foil
manufacturing
ingot
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PCT/CN2015/096442
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English (en)
French (fr)
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陈长发
姜全兵
李庆雄
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深圳市中金新材实业有限公司
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Publication of WO2017008430A1 publication Critical patent/WO2017008430A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
    • 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
    • B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00—Obtaining noble metals
    • 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
    • C22F1/14—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of noble metals or alloys based thereon

Definitions

  • the invention relates to the technical field of metal foil processing, in particular to a wide and ultra-thin pure gold foil strip and a manufacturing method thereof.
  • Gold is a beautiful golden yellow metal that has good ductility and its ductility is the best among all metals.
  • Gold is commonly used to make highly sensitive physical instrument components, various automation devices, rockets, submarines, computers, nuclear devices, and communication systems. A large number of electrical contacts in these devices are widely made of gold. Since the price of gold is relatively expensive, in order to actually reduce the cost of using gold, gold is generally processed into gold foil. Gold foil processing methods are used earlier, and the hand-made process can only produce small-sized pure gold foil sheets, which are costly to manufacture and cannot be made into strips, which restricts the use of gold foil.
  • Ci2AlNb-based alloy foil the rolling process includes a vacuum annealing heat treatment and a deformation processing rate per pass, wherein the process parameters of the vacuum annealing heat treatment are: 950-990 ° C heat preservation 1
  • the cooling was controlled in an hour, the cooling rate was 3 to 100 ° C / min, and after cooling to 850 to 900 ° C for 1 hour, the furnace was cooled, and the thickness of the gold foil obtained by the cold rolling process was 0.1 mm.
  • a method of manufacturing a gold foil by a rolling process using mechanical equipment can only produce a pure gold foil strip having a width of 160 mm or less. Since the rolling process has many passes per stage, the number of rolling times is large, which leads to complicated process. In addition, multiple annealing is required, which results in limited width of the gold foil, thick thickness of the foil strip, low yield, and foil per unit area. High consumables increase production costs, thereby limiting the industrial production of gold foil strips.
  • the present invention provides a method for manufacturing a wide-width ultra-thin pure gold foil tape, which is simple in manufacturing method, and the pure gold foil thus obtained has a wide bandwidth and an ultra-thin.
  • a method for manufacturing a wide and ultra-thin pure gold foil tape comprising the following steps:
  • the milled surface piece is cold-rolled and opened (rough-rolled) using a cold rolling equipment to form a gold plate having a thickness of 4 to 5 mm;
  • the gold plate processed in the step (5) is subjected to medium rolling by means of a belt rolling machine to form a gold belt having a thickness of 1 to 2 mm;
  • the gold strip processed by the step (7) is subjected to finish rolling using a finishing belt to form a gold strip having a thickness of 0.15 to 0.20 mm;
  • the gold strip processed by the step (8) is subjected to foil rolling to a predetermined thickness using a foil rolling apparatus;
  • the smelting apparatus may employ commercially available equipment commonly used in the art, such as high purity graphite crucible.
  • the temperature of the smelting is such that the solid gold material is melted into a liquid, that is, the temperature is controlled not lower than the melting point.
  • the temperature of the smelting in the present invention is not particularly limited and may be, for example, but not limited to, 1100 to 1150 °C.
  • a heat preservation stage can be implemented. There is no special requirement for the heat preservation time, for example, 0.5 to 1 hour.
  • the shape of the ingot is not particularly limited, and a square gold ingot is preferable for the convenience of later processing.
  • the size of the ingot is in principle smaller than the predetermined size of the gold foil strip, for example, the width can be 20 mm to 30 mm, and the thickness is 10 mm to 30 mm.
  • the ingot to be cast is heated to 600 to 650 ° C and placed in a closed mold for forging.
  • the temperature during the upset is preferably, but not limited to, 300 to 600 °C.
  • the width of the closed mold is 20 to 30 mm larger than that of the ingot.
  • the milling surface is designed to remove burrs and make it flat, with a processing thickness tolerance of 0.2 mm or less.
  • the specifications of the milled parts to be cold-rolled and opened are 10 kg/piece or more.
  • the pass processing ratio is preferably 35 to 50%.
  • the apparatus for cold rolling the open embryo is preferably a two-roll mill.
  • Medium rolling is carried out with appropriate tension and a small rolling force.
  • First pass pressing amount control 0.1 to 0.5 mm, the strip is corrected, and then rolled in multiple passes and small passes, and the pass processing rate is 35% to 50%.
  • Finish rolling should be carried out with appropriate tension and low rolling force. Multi-pass, small-pass indentation rolling, the pass rate should be controlled 25% to 40%, and the lubricating oil is cooled. Finished rolling equipment has no demanding requirements, such as a commercially available four-roll finishing mill.
  • the annealing temperature is preferably 550 to 580 °C.
  • the processes associated with the annealing operation can be performed according to conventional annealing techniques and will not be described herein.
  • the foil rolling adopts multi-pass and small-pass indentation rolling, and the processing rate of the pass should be controlled by 25% to 40%, and the lubricating oil is cooled.
  • the rolling speed is 20 to 200 meters per minute.
  • the thickness of the foil roll is designed with the thickness of the desired product, and the thickness achieved by the method of the present invention can reach 7 ⁇ m, which is thinner than in the prior art.
  • Post-treatment mainly includes annealing and subsequent slitting, packaging, and the like.
  • the surface treatment can be cleaned. Cleaning can be carried out using surface treatment techniques conventional in the art. Due to space limitations, it is not detailed.
  • Another aspect of the present invention provides a wide-width ultra-thin pure gold foil tape having a pure gold foil width and an ultra-thin.
  • a pure gold foil tape obtained by the above production method has a width of 180 to 600 mm and a thickness of 7 ⁇ m or more.
  • the method for producing a pure gold foil tape of the present invention employs ingot casting, closed forging, and milling, rolling, annealing, and the like.
  • the lead strip can be effectively reduced by the use of the lead belt, the disposable feeding amount can be controlled to a minimum of ten kilograms, and the raw material utilization rate is high, thereby avoiding the horizontal continuous casting method and the upper traction.
  • the method produces the lowest amount of gold raw material required for the embryonic belt, while avoiding the need for huge capital investment to start production.
  • the whole rolling process only needs cold rolling and opening (rough rolling), medium rolling, finishing rolling and foil rolling, and the rolling process is relatively simple; only one annealing is required before the rolling, which avoids the multiple annealing in the prior art. .
  • the process of the invention is simple, and the obtained pure gold foil has a wide bandwidth and an ultra-thin. In addition, the processing accuracy of the entire manufacturing method is also high.
  • the manufacturing method sequentially includes the following steps:
  • Milling surface the forgings are passed through the milling surface to remove the burrs, and the surface milling surface is flat. Milling surface thickness tolerance within 0.2mm, and clean it;
  • Cold-rolling open embryo Milling parts of ten kilograms or more are rolled by a two-roll mill to form a gold strip having a thickness of 4 mm.
  • the opening embryo should be carried out with a small pressure, a small number of passes, and a multi-pass method;
  • trimming annealing trimming the gold strip in the middle rolling, annealing temperature 550 ° C;
  • a 1 mm gold strip is rolled into a 0.15 mm gold strip by means of a draw belt using a four-roll finishing mill; the rolling is preferably carried out with appropriate tension and a small rolling force.
  • Multi-pass, small-pass indentation rolling, the pass processing rate should be controlled 25%, lubricating oil cooling;
  • foil rolling using a high-precision foil rolling mill for 0.15mm gold strip for foil rolling, the rolling thickness is determined according to product design requirements, the minimum can reach 7 ⁇ m. Multi-pass, small-pass indentation rolling, the pass rate should be controlled 25%, and the lubricating oil is cooled. Rolling speed 20 meters per minute;
  • the rolled finished gold foil strip is subjected to rewinding and horizontal annealing
  • cleaning and slitting surface cleaning of the foil strip product, removing impurities such as oil stains on the surface of the product, and then cutting according to the width of the actual use;
  • packaging finished product packaging into the warehouse.
  • the manufacturing method sequentially includes the following steps:
  • Milling surface the forgings are passed through the milling surface to remove the burrs, and the surface milling surface is flat. Milling surface thickness tolerance within 0.2mm, and clean it;
  • Cold-rolling open embryo a milled surface of 10 kg or more is rolled by a two-roll mill to form a gold strip having a thickness of 5 mm;
  • trimming annealing trimming the gold strip in the middle rolling, annealing temperature 580 ° C;
  • the 2 mm gold strip is rolled into a 0.2 mm gold strip by means of a draw belt using a four-roll finishing mill; the rolling is preferably carried out with appropriate tension and a small rolling force.
  • Multi-pass, small-pass indentation rolling, the pass processing rate should be controlled 40%, lubricating oil cooling;
  • foil rolling using a high-precision foil rolling mill for 0.20mm gold strip for foil rolling, the rolling thickness is determined according to product design requirements, the minimum can reach 7 ⁇ m. Multi-pass, small-pass indentation rolling, the pass rate should be controlled 40%, and the lubricating oil is cooled. Rolling speed of 200 meters per minute;
  • the rolled finished gold foil strip is subjected to rewinding and horizontal annealing
  • cleaning and slitting surface cleaning of the foil strip product, removing impurities such as oil stains on the surface of the product, and then cutting according to the width of the actual use;
  • packaging finished product packaging into the warehouse.
  • the manufacturing method sequentially includes the following steps:
  • Ingot The above pure gold liquid ingot is molded to obtain an ingot. With the wide width of the design product, the ingot size is a square gold ingot. The size of the gold ingot is in principle smaller than the width of the design wide gold foil strip 25mm and the thickness is 20mm;
  • Milling surface the forgings are passed through the milling surface to remove the burrs, and the surface milling surface is flat. Milling surface thickness tolerance within 0.2mm, and clean it;
  • a 4.5 mm gold plate is rolled into a gold plate strip having a thickness of 1.5 mm by means of a draw belt using a draw belt; the rolling is preferably carried out with appropriate tension and a small rolling force.
  • the first pass pressing amount of the rolling is controlled by 0.1 to 0.2 mm, and the strip is corrected. Then, the multi-pass and small-pass indentation rolling is used, and the pass processing rate is 42%;
  • trimming annealing trimming the gold strip in the middle rolling, annealing temperature 565 ° C;
  • the 1.5 mm gold strip is rolled into a 0.18 mm gold strip by means of a draw belt using a four-roll finishing mill; the rolling is preferably carried out with appropriate tension and a small rolling force. Multi-pass, small-pass indentation rolling, the pass processing rate should be controlled 32%, lubricating oil cooling.
  • foil rolling using a high-precision foil rolling mill for 0.18mm gold strip for foil rolling, the rolling thickness is determined according to product design requirements, the minimum can reach 7 ⁇ m. Multi-pass, small-pass indentation rolling, the pass processing rate should be controlled 32%, lubricating oil cooling. Rolling speed of 120 meters per minute;
  • the rolled finished gold foil strip is subjected to rewinding and horizontal annealing
  • cleaning and slitting surface cleaning of the foil strip product, removing impurities such as oil stains on the surface of the product, and then cutting according to the width of the actual use;
  • packaging finished product packaging into the warehouse.
  • the manufacturing method sequentially includes the following steps:
  • Ingot The above pure gold liquid ingot is molded to obtain an ingot. With the wide width of the design product, the ingot size is a square gold ingot. The size of the gold ingot is in principle smaller than the width of the design wide gold foil strip 25mm and the thickness is 25mm;
  • Milling surface the forgings are passed through the milling surface to remove the burrs, and the surface milling surface is flat. Milling surface thickness tolerance within 0.2mm, and clean it;
  • Cold-rolling open embryo (rough rolling): The milled surface parts of ten kilograms or more are smoothly rolled by a two-roll mill to form a gold strip with a thickness of 4 mm.
  • the opening embryo should be carried out with a small pressure, a small number of passes, and a multi-pass method;
  • trimming annealing trimming the gold strip in the middle rolling, annealing temperature 550 ° C;
  • a 1 mm gold strip is rolled into a 0.15 mm gold strip by means of a draw belt using a four-roll finishing mill; the rolling is preferably carried out with appropriate tension and a small rolling force. Multi-pass, small-pass indentation rolling, the pass processing rate should be controlled by 30%, and the lubricating oil is cooled;
  • foil rolling using a high-precision foil rolling mill for 0.15mm gold strip for foil rolling, the rolling thickness is determined according to product design requirements, the minimum can reach 7 ⁇ m. Multi-pass, small-pass indentation rolling, the pass rate should be controlled by 30%, and the lubricating oil is cooled. Rolling speed of 80 meters per minute;
  • the rolled finished gold foil strip is subjected to rewinding and horizontal annealing
  • cleaning and slitting surface cleaning of the foil strip product, removing impurities such as oil stains on the surface of the product, and then cutting according to the width of the actual use;
  • packaging finished product packaging into the warehouse.
  • the pure gold foil belt has a wide width, and can produce a pure gold foil belt with a width of 180mm or more and 600mm or less at a time.
  • the length of the foil strip can reach several kilometers or more at a time;
  • the thickness of pure gold foil tape is greatly reduced, the thickness can be as low as 7um, and the precision is high, the foil tape thickness tolerance is 3% Inside;
  • the amount of gold per unit area of the foil strip is greatly reduced. Taking the thickness of the 7 ⁇ m foil as an example, the amount of gold per square meter is only 135.2g, and the amount of gold used for the foil of 15 ⁇ m is 270.4g;
  • Gold has excellent ductility and is a good conductor of electricity and heat.
  • the ultra-thin wide-width gold foil makes the amount of gold per unit area of pure gold foil tape drop drastically, which brings about a significant drop in production costs and greatly expands.
  • the range of use of gold foil tapes has an irreplaceable position in the technical field where the requirements for ductility, heat dissipation, high temperature oxidation resistance and electrical conductivity are extremely high, such as electronics, IT, LED lighting, special cables, aerospace and other fields. It can also be widely used in civil home decoration, handicrafts and other industries.
  • the present invention illustrates the detailed process equipment and process flow of the present invention by the above embodiments, but the present invention is not limited to the above detailed process equipment and process flow, that is, does not mean that the present invention must rely on the above detailed process equipment and The process can only be implemented. It should be apparent to those skilled in the art that, for any improvement of the present invention, the equivalent replacement of each raw material (such as silver, K gold, etc.) of the product of the present invention, the addition of auxiliary components, the selection of specific means, etc., all fall within the scope of the present invention. The scope of protection and the scope of disclosure.

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Abstract

一种宽幅超薄的纯金箔带及其制造方法。所述制造方法包括：(1)熔炼；(2)铸锭成型；(3)镦锻；(4)铣面；(5)冷轧开胚；(6)中轧；(7)退火；(8)精轧；(9)箔轧；(10)后处理。所述制造方法在轧制的过程中借助引带，可以减少纯金箔加工一次性投料量；整个轧制工序只需粗轧、中轧、精轧和箔轧，轧制工序较为精简；箔轧之前只需一次退火，避免退火次数繁多。通过所述制造方法得到的纯金箔带宽幅、超薄。

Description

一种宽幅超薄的纯金箔带及其制造方法 技术领域
本发明涉及金属箔加工的技术领域，尤其涉及一种宽幅超薄的纯金箔带及其制造方法。
背景技术
纯金是一种美丽的金黄色的金属，它具有很好的延展性，其延展性在所有的金属中是最好的。金常用来制作灵敏度极高的物理仪器元件，各种自动化装置、火箭、潜水艇、计算机、核装置以及通讯系统，这些设备中大量的电接触点广泛用金制作。由于金的价格较贵，为实际降低金的使用成本，一般将金加工成金箔。金箔的加工方法较早使用手工，手工制作工艺只能制作小尺寸的纯金箔片，制作成本很高，且无法制作成带材，制约了金箔的使用范围。
目前出现了用机械设备加工制作金箔的技术。该技术通常采用冷轧的工艺。例如，中国专利CN 104226684A公开了一种Ti2AlNb基合金箔材的冷轧工艺，轧制工艺包括真空退火热处理和每道次变形加工率，其中真空退火热处理的工艺参数为:950～990℃保温1小时控制冷却，冷却速度3～100℃/分钟，冷却至850～900℃保温1小时后随炉冷却，该冷轧工艺所得到的金箔厚度为0.1mm。现有技术中，采用机械设备通过轧制工艺制造金箔的方法只能生产幅宽160mm以下的纯金箔带。由于轧制过程每阶段道次多，轧制次数较多，导致工序复杂；另外需要实施多次退火，由此导致金箔幅宽受限、箔带厚度偏厚、成品率低，单位面积箔材耗材高，提高了生产成本，由此限制了金箔带材的工业化生产应用。
发明内容
有鉴于此，本发明提供一种宽幅超薄的纯金箔带的制造方法，该制造方法简单，由此制得的纯金箔带宽幅、超薄。
一种宽幅超薄的纯金箔带的制造方法，包括以下步骤：
(1)将纯金料熔炼成纯金液；
(2)将所述纯金液铸锭成型，得到铸锭件；
(3)将所述铸锭件置于封闭式模具中进行镦锻，得到镦锻件；
(4)将所述镦锻件在封闭环境下进行铣面，得到铣面件；
(5)将所述铣面件使用冷轧设备进行冷轧开胚(粗轧)，形成厚度为4～5mm的的金板；
(6)将步骤(5)处理的金板借助引带使用中轧设备进行中轧形成厚度为1～2mm的金带；
(7)将经步骤(6)处理的金带进行退火；
(8)将经步骤(7)处理的金带借助引带使用精轧设备进行精轧形成厚度为0.15～0.20mm的金带；
(9)将经步骤(8)处理的金带使用箔轧设备进行箔轧至预定的厚度；
(10)将经步骤(9)处理的金箔带进行后处理。
上述方法中，熔炼设备可采用本领域通用的市售的设备，例如高纯石墨坩埚。熔炼的温度以将固体的金料熔化成液体即可，即温度控制于不低于熔点。本发明对熔炼的温度不作特殊限定，例如可以但不局限于1100～1150℃。于熔炼过程中，当纯金料全部变成了金液后，可实施一保温的阶段。保温的时间没有特殊要求，例如0.5～1h。
铸锭件的形状无特殊要求，为便于后期的加工，可优选为正方形金锭。铸锭件尺寸原则上要小于金箔带的预订尺寸，例如可以宽度小20mm～30mm，其厚度10mm～30mm。
在镦锻的工序中，待铸镦的铸锭件被加热到600～650℃后置入封闭式模具进行锻造。镦锻的过程中温度优选但不限定为300～600℃。封闭式模具的宽度较铸锭件大20～30mm。使用封闭式锻造的目的是为了改善铸锭性内部晶体结构，消除缺陷，便于后期轧制品质提高，同时还可以减少铣面工作量，提高材料使用率。
铣面是为了去除毛刺，使得平整，其加工厚度公差为0.2mm以下。
冷轧开胚(粗轧)的工序中，待冷轧开胚的铣面件的规格在10kg/个以上。道次加工率优选为35～50％。冷轧开胚的设备优选为二辊轧机。
中轧采用适当的张力和较小的轧制力进行。开轧第一道次压入量控制 0.1～0.5mm，进行板带修正，之后采用多道次、小道次压入量轧制，道次加工率35％～50％。中轧的设备无苛刻的要求，例如市售的四辊中轧机。
精轧宜采用适当的张力和较小的轧制力进行。采用多道次、小道次压入量轧制，道次加工率宜控制25％～40％，润滑油冷却。精轧的设备无苛刻的要求，例如市售的四辊精轧机。
退火的温度优选为550～580℃。退火的操作的相关过程，例如退火的介质和退火的时间可根据常用的退火技术来实施，在此不再赘述。
箔轧采用多道次、小道次压入量轧制，道次加工率宜控制25％～40％，润滑油冷却。轧制速度每分钟20～200米。箔轧的设备无苛刻的要求，例如市售的高精箔轧机。箔轧的厚度以所需产品的厚度来设计，于本发明的方法所达到的厚度可达到7μm，较现有技术要更薄。
后处理主要包括退火和之后的分条裁切、包装等。表面处理可以清洗。清洗可采用本领域常规的表面处理技术来实施。限于篇幅，不在详述。
本发明另一方面提供一种宽幅超薄的纯金箔带，纯金箔带宽幅、超薄。
一种如上述制造方法得到的纯金箔带，其幅宽为180～600mm，厚度为7μm以上。
由于其幅宽较大、厚度较薄，使得单位面积箔带用金量大幅下降，大大地节约了成本。
本发明的纯金箔带的制造方法，采用铸锭、封闭式锻造和铣面、轧制、退火等工序。在轧制的过程中借助引带，可以有效地减少纯金箔加工一次性投料量，一次性投料量可控制到最低十公斤，且原料使用率高，从而避免了如水平连铸法、上牵引法生产胚带所需要的最低近吨的黄金原料，同时避免了需要庞大资金的投入才能启动生产。整个轧制工序只需冷轧开胚(粗轧)、中轧、精轧和箔轧，轧制工序较为精简；箔轧之前也只需一次退火，避免了现有技术中多次退火的繁多。本发明工序简单，由此得到的纯金箔带宽幅、超薄。此外，整个制造方法的加工精度也较高。
具体实施方式
下面结合实施例来进一步说明本发明的技术方案。
实施例1
本例中，制造方法依次包括以下工序：
(1)、熔炼：将纯金料投入坩锅熔炼炉中进行熔炼，熔炼温度1100℃，保温1小时；
(2)、铸锭：将上述纯金液铸锭成型，得到铸锭件。采用设计产品的宽幅需要，铸锭件形状为方形金锭。金锭尺寸原则上要小于设计宽幅金箔带宽度20mm，厚度10mm；
(3)、镦锻：将铸造好的方形金锭进行加温后，放入封闭式模具中进行镦锻。锻造温度控制在300℃，反复锻造，直至将封闭式模具充满；
(4)、铣面：将镦锻件通过铣面以去除毛刺，表面铣面平整。铣面厚度公差0.2mm以内，并将其清洗干净；
(5)、冷轧开胚(粗轧)：将十公斤及以上的铣面件通过二辊轧机轧制开胚成厚度为4mm的金板带。开胚宜采用较小的压力、较小的道次压入量、多道次方式进行；
(6)、中轧借助引带，使用四辊轧机将4mm的金板带轧制成厚度1mm的金板带；开轧第一道次压入量控制0.1mm，进行板带修正，之后采用多道次、小道次压入量轧制，道次加工率35％；
(7)、切边退火：对中轧金带进行切边退火，退火温度550℃；
(8)、精轧：借助引带使用四辊精轧机将1mm的金板带轧制成0.15mm的金带；轧制宜采用适当的张力和较小的轧制力进行。采用多道次、小道次压入量轧制，道次加工率宜控制25％，润滑油冷却；
(9)、箔轧：使用高精箔轧机对0.15mm的金带进行箔轧，轧制厚度根据产品设计要求确定，最低可达7μm。采用多道次、小道次压入量轧制，道次加工率宜控制25％，润滑油冷却。轧制速度每分钟20米；
(10)、根据成品实际使用需要，将轧制的成品金箔带进行收放卷式水平退火；
(11)、清洗分条：对箔带产品进行表面清洗，去除产品表面的油污等杂质，之后根据实际使用的宽度需要进行分条裁切；
(12)、包装：成品包装入库。
实施例2
本例中，制造方法依次包括以下工序：
(1)、熔炼：将纯金料投入坩锅熔炼炉中进行熔炼，熔炼温度1150℃，保温0.5小时；
(2)、铸锭：将上述纯金液铸锭成型，得到铸锭件。采用设计产品的宽幅需要，铸锭件形状为方形金锭。金锭尺寸原则上要小于设计宽幅金箔带宽度30mm，厚度30mm；
(3)、镦锻：将铸造好的方形金锭进行加温后，放入封闭式模具中进行镦锻。锻造温度控制在650℃，反复锻造，直至将封闭式模具充满；
(4)、铣面：将镦锻件通过铣面以去除毛刺，表面铣面平整。铣面厚度公差0.2mm以内，并将其清洗干净；
(5)、冷轧开胚(粗轧)：将十公斤及以上的铣面件通过二辊轧机轧制开胚成厚度为5mm的金板带；
(6)、中轧借助引带，使用四辊轧机将5mm的金板轧制成厚度2mm的金板带；开轧第一道次压入量控制0.2mm，进行板带修正，之后采用多道次、小道次压入量轧制，道次加工率50％；
(7)、切边退火：对中轧金带进行切边退火，退火温度580℃；
(8)、精轧：借助引带使用四辊精轧机将2mm的金板带轧制成0.2mm的金带；轧制宜采用适当的张力和较小的轧制力进行。采用多道次、小道次压入量轧制，道次加工率宜控制40％，润滑油冷却；
(9)、箔轧：使用高精箔轧机对0.20mm的金带进行箔轧，轧制厚度根据产品设计要求确定，最低可达7μm。采用多道次、小道次压入量轧制，道次加工率宜控制40％，润滑油冷却。轧制速度每分钟200米；
(10)、根据成品实际使用需要，将轧制的成品金箔带进行收放卷式水平退火；
(11)、清洗分条：对箔带产品进行表面清洗，去除产品表面的油污等杂质，之后根据实际使用的宽度需要进行分条裁切；
(12)、包装：成品包装入库。
实施例3
本例中，制造方法依次包括以下工序：
(1)、熔炼：将纯金料投入坩锅熔炼炉中进行熔炼，熔炼温度1125℃，保温0.75 小时；
(2)、铸锭：将上述纯金液铸锭成型，得到铸锭件。采用设计产品的宽幅需要，铸锭件尺寸为方形金锭。金锭尺寸原则上要小于设计宽幅金箔带宽度25mm，厚度20mm；
(3)、镦锻：将铸造好的方形金锭进行加温后，放入封闭式模具中进行镦锻。锻造温度控制在500℃，反复锻造，直至将封闭式模具充满；
(4)、铣面：将镦锻件通过铣面以去除毛刺，表面铣面平整。铣面厚度公差0.2mm以内，并将其清洗干净；
(5)、冷轧开胚(粗轧)：将十公斤及以上的铣面件通过二辊轧机轧制开胚成厚度为4.5mm的金板带；开胚宜采用较小的压力、较小的道次压入量、多道次方式进行；
(6)、中轧借助引带，使用四辊轧机将4.5mm的金板轧制成厚度1.5mm的金板带；轧制宜采用适当的张力和较小的轧制力进行。开轧第一道次压入量控制0.1～0.2mm，进行板带修正，之后采用多道次、小道次压入量轧制，道次加工率42％；
(7)切边退火：对中轧金带进行切边退火，退火温度565℃；
(8)、精轧：借助引带使用四辊精轧机将1.5mm的金板带轧制成0.18mm的金带；轧制宜采用适当的张力和较小的轧制力进行。采用多道次、小道次压入量轧制，道次加工率宜控制32％，润滑油冷却。
(9)、箔轧：使用高精箔轧机对0.18mm的金带进行箔轧，轧制厚度根据产品设计要求确定，最低可达7μm。采用多道次、小道次压入量轧制，道次加工率宜控制32％，润滑油冷却。轧制速度每分钟120米；
(10)、根据成品实际使用需要，将轧制的成品金箔带进行收放卷式水平退火；
(11)、清洗分条：对箔带产品进行表面清洗，去除产品表面的油污等杂质，之后根据实际使用的宽度需要进行分条裁切；
(12)、包装：成品包装入库。
实施例4
本例中，制造方法依次包括以下工序：
(1)、熔炼：将纯金料投入坩锅熔炼炉中进行熔炼，熔炼温度1125℃，保温0.5 小时；
(2)、铸锭：将上述纯金液铸锭成型，得到铸锭件。采用设计产品的宽幅需要，铸锭件尺寸为方形金锭。金锭尺寸原则上要小于设计宽幅金箔带宽度25mm，厚度25mm；
(3)、镦锻：将铸造好的方形金锭进行加温后，放入封闭式模具中进行镦锻。锻造温度控制在500℃，反复锻造，直至将封闭式模具充满；
(4)、铣面：将镦锻件通过铣面以去除毛刺，表面铣面平整。铣面厚度公差0.2mm以内，并将其清洗干净；
(5)、冷轧开胚(粗轧)：将十公斤及以上的铣面件通过二辊轧机顺利的轧制开胚成厚度为4mm的金板带。开胚宜采用较小的压力、较小的道次压入量、多道次方式进行；
(6)、中轧借助引带，使用四辊轧机将4mm的金板轧制成厚度1mm的金板带；开轧第一道次压入量控制0.1mm，进行板带修正，之后采用多道次、小道次压入量轧制，道次加工率40％
(7)切边退火：对中轧金带进行切边退火，退火温度550℃；
(8)、精轧：借助引带使用四辊精轧机将1mm的金板带轧制成0.15mm的金带；轧制宜采用适当的张力和较小的轧制力进行。采用多道次、小道次压入量轧制，道次加工率宜控制30％，润滑油冷却；
(9)、箔轧：使用高精箔轧机对0.15mm的金带进行箔轧，轧制厚度根据产品设计要求确定，最低可达7μm。采用多道次、小道次压入量轧制，道次加工率宜控制30％，润滑油冷却。轧制速度每分钟80米；
(10)、根据成品实际使用需要，将轧制的成品金箔带进行收放卷式水平退火；
(11)、清洗分条：对箔带产品进行表面清洗，去除产品表面的油污等杂质，之后根据实际使用的宽度需要进行分条裁切；
(12)、包装：成品包装入库。
本发明的制造方法具有以下方面的优势：
1、纯金箔带幅宽大，可以一次性生产幅宽180mm以上、600mm以下的纯金箔带，箔带长度一次性可达数千米及以上；
2、纯金箔带厚度大幅下降，厚度可低至7um，且精度高，箔带厚度公差3％以 内；
3、单位面积箔带用金量大幅下降，以厚度7μm箔材为例，每平方米用金量仅仅135.2g，而厚度15μm的箔材用金量为270.4g；
4、金的延展性极佳，也是较好的电和热的导体，超薄的宽幅金箔使得纯金箔带的单位面积用金量大幅下降，带来了生产成本大幅下降，极大地拓宽了金箔带的使用范围，对于在部分对延展性、散热、高温抗氧化与导电性要求极高的科技领域中有其不可替代的地位，像电子、IT、LED照明、特种电缆、航空航天等领域，也可以广泛使用在民用家居装潢、工艺品等产业。
由于本发明中所涉及的各工艺参数的数值范围在上述实施例中不可能全部体现，但本领域的技术人员完全可以想象到只要落入上述该数值范围内的任何数值均可实施本发明，当然也包括若干项数值范围内具体值的任意组合。此处，出于篇幅的考虑，省略了给出某一项或多项数值范围内具体值的实施例，此不应当视为本发明的技术方案的公开不充分。
申请人声明，本发明通过上述实施例来说明本发明的详细工艺设备和工艺流程，但本发明并不局限于上述详细工艺设备和工艺流程，即不意味着本发明必须依赖上述详细工艺设备和工艺流程才能实施。所属技术领域的技术人员应该明了，对本发明的任何改进，对本发明产品各原料(如白银、K金等)的等效替换及辅助成分的添加、具体方式的选择等，均落在本发明的保护范围和公开范围之内。

Claims (10)

  1. 一种宽幅超薄的纯金箔带的制造方法，其特征在于，包括以下步骤：
    (1)将纯金料熔炼成纯金液；
    (2)将所述纯金液铸锭成型，得到铸锭件；
    (3)将所述铸锭件置于封闭式模具中进行镦锻，得到镦锻件；
    (4)将所述镦锻件在封闭环境下进行铣面，得到铣面件；
    (5)将所述铣面件使用冷轧设备进行冷轧开胚(粗轧)，形成厚度为4～5mm的金板；
    (6)将步骤(5)处理的金板借助引带使用中轧设备进行中轧形成厚度为1～2mm的金带；
    (7)将经步骤(6)处理的金带进行退火；
    (8)将经步骤(7)处理的金带借助引带使用精轧设备进行精轧形成厚度为0.15～0.20mm的金带；
    (9)将经步骤(8)处理的金带使用箔轧设备进行箔轧至预定的厚度；
    (10)将经步骤(9)处理的金箔带进行后处理。
  2. 根据权利要求1所述的制造方法，其特征在于，步骤(1)中所述熔炼的温度为1100～1150℃，所述熔炼过程中保温时间为0.5～1h。
  3. 根据权利要求1所述的制造方法，其特征在于，步骤(2)中所述铸锭件，较纯金箔带的预订尺寸，其宽度小20mm～30mm，其厚度10mm～30mm。
  4. 根据权利要求1所述的制造方法，其特征在于，步骤(3)中：
    待镦锻的铸锭件被加热到600～650℃后置入封闭式模具；
    优选地，所述镦锻的过程中温度为300～600℃；
    优选地，所述封闭式模具的宽度较铸锭件大20～30mm。
  5. 根据权利要求1所述的制造方法，其特征在于，步骤(5)中：
    待冷轧开胚的铣面件的规格在10kg/个以上；
    优选地，道次加工率为35～50％；
    优选地，所述冷轧开胚的设备为二辊轧机。
  6. 根据权利要求1所述的制造方法，其特征在于，步骤(6)中所述中轧的道次加工率为35～50％；
    优选地，所述中轧设备为四辊中轧机。
  7. 根据权利要求1所述的制造方法，其特征在于，步骤(8)中所述精轧的道次加工率为25～35％；
    优选地，所述精轧设备为四辊精轧机。
  8. 根据权利要求1所述的制造方法，其特征在于，步骤(9)中所述箔轧的道次加工率为25～40％；
    优选地，所述箔轧的轧制速率为20～200m/min；
    优选地，所述箔轧设备为高精箔轧机。
  9. 根据权利要求1所述的制造方法，其特征在于，步骤(7)中所述退火的温度为550～580℃；
    优选地，所述退火之前进行切边，优选地，步骤(8)中所述后处理由先至后依次包括退火和清洗；
    优选地，所述清洗后还包括分条裁切。
  10. 一种如权利要求1所述制造方法得到的纯金箔带，其特征在于，其幅宽为180～600mm，厚度为7μm以上。
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