Nickel-free white copper alloy strip foil and preparation method thereof

文档序号：758882 发布日期：2021-04-06 浏览：63次中文

阅读说明：本技术 一种无镍白色铜合金带箔材及其制备方法 (Nickel-free white copper alloy strip foil and preparation method thereof ) 是由刘娜蔡兰英姜业欣郑朋艳张县委贺玲慧田原晨苏花鲜田英明于 2020-12-10 设计创作，主要内容包括：本发明公开了一种无镍白色铜合金带箔材及其制备方法。无镍白色铜合金带箔材的厚度为0.04～0.1mm,由以下重量百分比的原料组成：Zn：5-15%,Mn：10-14%,Al：0.5-1.5%,Sn：0.5-1.5%,Ti：0.05-0.5%,Si：0.01-0.3%,B：0.01-0.3%,Ce：0.01-0.3%,余量是Cu和不可避免的杂质,所述的杂质含量低于0.2%；其制备方法经熔炼-水平连铸-铣面-粗轧开坯-多道次中轧-多道次精轧得无镍白色铜合金带箔材,生产工艺简单,流程短,成品率高,白色色度好,环境友好,可以满足建筑物室内装潢、家具车辆装饰等对白色铜合金带箔材的需求。(The invention discloses a nickel-free white copper alloy strip foil and a preparation method thereof. The thickness of the nickel-free white copper alloy strip foil is 0.04-0.1 mm, and the nickel-free white copper alloy strip foil is composed of the following raw materials in percentage by weight: zn: 5-15%, Mn: 10-14%, Al: 0.5-1.5%, Sn: 0.5-1.5%, Ti: 0.05 to 0.5%, Si: 0.01-0.3%, B: 0.01-0.3%, Ce: 0.01-0.3%, the balance being Cu and unavoidable impurities, the content of said impurities being less than 0.2%; the preparation method comprises the steps of smelting, horizontal continuous casting, surface milling, rough rolling and cogging, multi-pass intermediate rolling and multi-pass finish rolling to obtain the nickel-free white copper alloy strip foil, and has the advantages of simple production process, short flow, high yield, good white chromaticity and environmental friendliness, and can meet the requirements of indoor decoration of buildings, decoration of furniture and vehicles and the like on the white copper alloy strip foil.)

1. The nickel-free white copper alloy strip foil is characterized by being 0.04-0.1 mm thick and composed of the following raw materials in percentage by weight: zn: 5-15%, Mn: 10-14%, Al: 0.5-1.5%, Sn: 0.5-1.5%, Ti: 0.05 to 0.5%, Si: 0.01-0.3%, B: 0.01-0.3%, Ce: 0.01-0.3%, the balance being Cu and unavoidable impurities, the content of said impurities being less than 0.2%.

2. The method for preparing the nickel-free white copper alloy strip foil as set forth in claim 1, which comprises the steps of:

(1) smelting: putting zinc, manganese, aluminum, tin, copper-titanium intermediate alloy, copper-silicon intermediate alloy, copper-boron intermediate alloy, copper-cerium intermediate alloy and electrolytic copper into a medium-frequency induction furnace for melting, fully stirring, skimming, adding charcoal for covering, heating to 1200-1250 ℃, preserving heat for 20-40 minutes, taking a sample in the furnace, standing the converter after the spectral analysis components meet the requirements, skimming again, adding charcoal for covering, and fully standing;

(2) horizontal continuous casting: controlling the temperature of the alloy melt in the furnace at 1150-;

(3) milling a surface: milling the surface of the copper alloy coil blank obtained in the step (2), wherein the thickness of the upper and lower single surfaces is 0.2-1.0 mm;

(4) rough rolling and cogging: guiding the copper alloy coil blank obtained in the step (3) into a two-roller roughing mill, and rolling the blank ingot at a rolling speed of 10-40m/min, wherein the single-pass processing rate is controlled to be 90% -95%, so as to obtain a rough rolling plate blank;

(5) multi-pass intermediate rolling: carrying out multi-pass intermediate rolling on the rough rolling coil blank obtained in the step (4), wherein the processing rate of the first pass intermediate rolling is controlled not to exceed 55%, the total processing rate is controlled not to exceed 85%, and the rolling speed is 1-30 m/min;

(6) and (3) multi-pass finish rolling: and (5) performing multi-pass finish rolling on the medium-rolling coil blank obtained in the step (5), controlling the first-pass finish rolling processing rate to be not more than 40%, controlling the total processing rate to be not more than 60%, and controlling the rolling speed to be 1-20m/min, so as to obtain the nickel-free white copper alloy strip foil.

3. The method according to claim 2, wherein the melt level in step (2) is maintained at a level of more than one-half of the furnace height.

4. The manufacturing method according to claim 2, wherein the water inlet pressure of the cooling water in the horizontal continuous casting process in the step (2) is 0.1 to 0.6MPa, the water inlet temperature of the cooling water is 5 to 25 ℃, and the water outlet temperature of the cooling water is 30 to 60 ℃.

5. The method for preparing the alloy steel strip as claimed in claim 2, wherein the rough rolling cogging in the step (4) immediately raises the temperature of the rolled piece to 680-800 ℃ through deformation heat released by large deformation of the copper alloy coil blank after biting.

6. The method as claimed in claim 2, wherein the copper alloy coil blanks obtained in the steps (5) and (6) are subjected to intermediate annealing or finish annealing at 640-780 ℃ and at an annealing speed of 20-100 m/min.

7. The production method according to claim 6, wherein the annealing in step (5) and step (6) is performed in an air cushion type continuous annealing furnace.

Technical Field

The invention belongs to the technical field of metal material processing, and particularly relates to a nickel-free white copper alloy strip foil and a preparation method thereof.

Background

The traditional cupronickel alloy has beautiful and elegant silvery white luster and relatively low price, is often used for manufacturing decorative materials imitating silver and platinum, is the most important one of low-price decorative materials, is often used for manufacturing daily necessities such as coins, zippers, buttons, spectacle frames, mobile phone shells and the like, and manufacturing decorative materials of ornaments, gift box packages, building inner walls and indoor furniture, and particularly is used for door surfaces and indoor decoration of commercial institutions. The most common white copper alloy is copper-nickel-zinc alloy, however, with the development of modern medicine, nickel is found to be a typical sensitizing element, which can not only cause allergic contact dermatitis, erythema, pimple and the like, affect the normal contraction of muscles, damage enzymes and even possibly cause canceration. In view of the serious consequences caused by nickel allergy, the European institute of technology has established a nickel instruction 94/27/EC as early as 1994, and the European institute of technology has revised the nickel release rate of puncture ornaments specially in 2004, and has established a new instruction 2004/96/EC, and China has also established a corresponding nickel release rate standard in succession. Currently, most countries and regions begin to restrict the production and use of nickel-containing articles, and this trend is severe year by year.

Therefore, the development of nickel-free white copper alloy which does not contain nickel element in the alloy components and has beautiful silvery luster and good comprehensive performance has become a research hotspot in recent years. As early as 1998, 2000 and 2002, Japanese YKK corporation applied 4 invention patents (CN1219598, CN1278561, CN1271023 and CN1414126) about nickel-free white copper alloy in China respectively, wherein CN1414126 is Cu-Zn-Ti alloy, and the other 3 items are Cu-Zn-Mn alloy, because the composition ranges given in the patents are too wide, the obtained alloy has too large difference of color tone and performance, and the production methods of induction melting-copper mold casting-extrusion molding are adopted, thereby lacking practical guiding significance for large-scale production of factories and having low industrialization degree. In 2002, the first Shanghai copper bar factory and Shanghai university of transportation collaborate to apply for 1 patent of nickel-free cupronickel (CN1334352) in China, and on the basis of comprehensively analyzing the defects of two patents (CN1219598 and CN1271023) of YKK corporation, the alloy composition which enables the performance of the alloy to be more reasonable and has a proper range is provided, and meanwhile, the processing method of the alloy wire is disclosed. 2010 Jiangxi university of science and engineering applies 1 invention patent (CN101899588) of nickel-free cupronickel in China, and provides a nickel-free cupronickel alloy containing rare earth elements and a processing method of a plate material thereof. The invention discloses 1 patent (CN102242292) for nickel-free cupronickel applied to China by the university of the south in 2011, and provides a high-discoloration-resistance free-cutting nickel-free cupronickel alloy component and a processing method of a plate thereof. The patent of 1 invention without nickel and white copper (CN106868336) is applied to China by the Qilu industrial university in 2017, and a method for preparing a nickel-free white copper alloy wire in a short process is provided.

However, the above patents do not report the production method of nickel-free white copper strip foil. The fields of ceilings, walls, partition walls, doors and windows, floors, furniture, luxury decorative materials of ships, vehicles and the like of buildings have great demand on white copper alloys, and because the foil-bearing materials are more beneficial to the subsequent production processing and use of the products in shape and can more easily exert the mechanical property of the alloys in the three-dimensional compressive stress state borne by the foil-bearing materials in the rolling process, most decorative white copper alloys are manufactured and processed into the foil-bearing materials, so that the subsequent production processing and use are more facilitated. Therefore, it is necessary to develop a short-flow preparation technology for nickel-free white copper alloy foil.

Disclosure of Invention

The invention provides a nickel-cupronickel alloy strip foil and a preparation method thereof, aiming at the problems that the nickel-cupronickel strip foil material is lack in the prior art and the prior art is difficult to realize industrial production, the thickness of the alloy strip foil prepared by the method is only 0.04-0.1 mm, the production process is simple, the flow is short, the yield is high, the white chromaticity is good, and the requirements of indoor decoration of buildings, furniture and vehicle decoration and the like on the white copper alloy strip foil material can be met.

The invention is realized by the following technical scheme:

the nickel-free white copper alloy strip foil is 0.04-0.1 mm thick and comprises the following raw materials in percentage by weight: zn: 5-15%, Mn: 10-14%, Al: 0.5-1.5%, Sn: 0.5-1.5%, Ti: 0.05 to 0.5%, Si: 0.01-0.3%, B: 0.01-0.3%, Ce: 0.01-0.3%, the balance being Cu and unavoidable impurities, the content of said impurities being less than 0.2%.

In the invention, the preparation method of the nickel-free white copper alloy strip foil comprises the following steps:

(2) horizontal continuous casting: controlling the temperature of the alloy melt in the furnace at 1150-;

(3) milling a surface: milling the surface of the copper alloy coil blank obtained in the step (2), wherein the thickness of the upper and lower single surfaces is 0.2-1.0 mm;

Further, the height of the melt in the step (2) is kept above one half of the height of the furnace.

Further, the water inlet pressure of the cooling water in the horizontal continuous casting process in the step (2) is 0.1-0.6MPa, the water inlet temperature of the cooling water is 5-25 ℃, and the water outlet temperature of the cooling water is 30-60 ℃.

Further, the rough rolling cogging in the step (4) immediately raises the temperature of the rolled piece to 680-800 ℃ through deformation heat released by large deformation of the copper alloy coil blank after biting.

Further, the copper alloy coil blanks obtained in the step (5) and the step (6) are subjected to intermediate annealing or finished product annealing, the annealing temperature is 640-780 ℃, and the annealing speed is 20-100 m/min.

Further, the annealing in the step (5) and the step (6) is performed in an air cushion type continuous annealing furnace.

The nickel-free white copper alloy strip foil prepared by the invention has the color range of 62< L <90, -2.2< a <3.8, -2.8< b <8.8 by using the CIE LAB color system, and the color tone is white.

Firstly, the invention adopts horizontal continuous casting (pulling-stopping-reverse pushing) to prepare the continuous casting slab, the continuous casting slab has continuous columnar crystal structure, the cold processing extension deformability of the continuous casting slab is superior to that of a common cast slab, and the continuous casting slab is beneficial to large deformation of subsequent rough rolling. Then, the invention carries out surface milling treatment on the continuous casting slab, then introduces the slab into a two-roller roughing mill, controls the rolling speed, ensures that the temperature of a rolled piece is instantly raised to 680-plus 800 ℃ by virtue of deformation heat released by large deformation after the slab is bitten, has enough superheat degree to ensure that the rolled piece is dynamically recrystallized, and is converted into a soft recrystallization structure suitable for deep processing from a cold casting structure to realize complete recrystallization, so that the typical dendritic structure of the cast alloy is converted into the dynamic recrystallization structure after the hot processing is finished, thereby improving the rolling efficiency and the plate quality. At the same time, the slab in the deformation zone can be in a dynamic recrystallization state, thus allowing the use of a faster rolling speed, thus increasing the output of the single rolling mill. In addition, the narrow rolling temperature range (680-800 ℃) ensures that the rolled plate and strip has uniform temperature and complete equiaxial grains, so that the subsequent multi-pass rolling has larger deformability, and the intermediate annealing process is reduced or even cancelled.

Advantageous effects

(1) The preparation method for preparing the nickel-free white copper alloy strip foil has the advantages that: the production process is simple, the flow is short, the yield is high, the white chromaticity is good, the environment is friendly, and the requirements of indoor decoration of buildings, furniture and vehicle decoration and the like on the white copper alloy strip foil can be met.

(2) The invention guides the milled strip into a two-roller roughing mill, controls the rolling speed, ensures that the temperature of the rolled piece is instantly increased to 680-800 ℃ by the deformation heat released by large deformation after the plate blank is bitten, has enough superheat degree to ensure that the rolled piece is dynamically recrystallized, and is converted into a soft recrystallization structure suitable for deep processing from a cold casting structure, thereby realizing complete recrystallization and avoiding the heat treatment process of the strip.

Detailed Description

For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate the features and advantages of the invention and not to limit the scope of the claims.

The invention comprises the following raw materials: electrolytic copper, pure zinc, pure manganese, pure aluminum, pure tin, copper-titanium intermediate alloy, copper-silicon intermediate alloy, copper-boron intermediate alloy, and copper-cerium intermediate alloy.

Example 1:

(1) the components of the strip foil blank (mass percent): zn: 14%, Mn: 10%, Al: 1.0%, Sn: 1.0%, Ti: 0.15%, Si: 0.1%, B: 0.3%, Ce: 0.08%, the balance being an alloy of Cu and unavoidable impurities;

(2) melting

According to the designed component ratio of the white copper alloy, putting pure zinc, pure manganese, pure aluminum, pure tin, copper-titanium intermediate alloy, copper-silicon intermediate alloy, copper-boron intermediate alloy, copper-cerium intermediate alloy and electrolytic copper into a medium-frequency induction furnace for melting, skimming, adding charcoal for covering, heating to 1240 ℃, taking a sample in the furnace, after the components of spectral analysis meet the requirements (the component requirements in the step (1)), standing the converter, skimming again, adding charcoal for covering, and fully standing for 30 minutes;

(3) horizontal continuous casting

After the normal operation of the whole set of equipment of the horizontal continuous casting machine and the flexible rotation of the dummy ingot device are confirmed, casting and drawing are started, the temperature of an alloy melt in a heat preservation furnace is required to be controlled to 1350 ℃ in the drawing process, the height of the melt is kept to be more than one half of the height of the heat preservation furnace, the drawing speed is controlled to be 230mm/min by adopting a drawing-stopping-reverse pushing process in the horizontal continuous casting, the outlet temperature of a casting blank is 340 ℃, the casting blank is drawn and cast into a coil blank, and the specification of the coil blank is 15mm in thickness and 400 mm; in the continuous casting process, the water inlet pressure of cooling water is 0.3MPa, the water inlet temperature of the cooling water is 18 ℃, and the water outlet temperature of the cooling water is 42 ℃;

(4) milling surface

Milling the surface of the copper alloy continuous casting billet obtained in the step (3), and milling the upper and lower single surfaces to be 0.5mm in thickness;

(5) roughing cogging

Guiding the copper alloy billet obtained in the step (4) into a two-roll roughing mill, and rolling the billet at a rolling speed of 10m/min, wherein the single-pass processing rate is 91 percent to obtain a rough rolling plate blank with the thickness of 1.26mm, which is converted into a recrystallization structure from a casting structure;

(6) multiple pass medium rolling

(7) multiple pass finish rolling

Performing multi-pass finish rolling on the medium rolling plate blank obtained in the step (6), wherein the first pass finish rolling machining rate is controlled not to exceed 40%, the total machining rate is 58%, the rolling speed is 8m/min, and the thickness of a finished product is 0.1 mm; and annealing the finished product, wherein the annealing is carried out in an air cushion type continuous annealing furnace, the annealing temperature is 740 ℃, and the air cushion furnace annealing speed is 70 m/min.

Example 2:

(1) the components of the strip foil blank (mass percent): zn: 11%, Mn: 14%, Al: 1.0%, Sn: 0.9%, Ti: 0.06%, Si: 0.3%, B: 0.02%, Ce: 0.3%, the balance being an alloy of Cu and unavoidable impurities;

(2) melting

According to the designed component ratio of the white copper alloy, putting pure zinc, pure manganese, pure aluminum, pure tin, a copper-titanium intermediate alloy, a copper-silicon intermediate alloy, a copper-boron intermediate alloy, a copper-cerium intermediate alloy and electrolytic copper into a medium-frequency induction furnace for melting, skimming slag, then adding charcoal for covering, heating to 1210 ℃, taking a sample in the furnace, standing the converter after the spectral analysis components meet the requirements, skimming slag again, adding charcoal for covering, and fully standing for 40 minutes;

(3) horizontal continuous casting

After the normal operation of the whole set of equipment of the horizontal continuous casting machine and the flexible rotation of the dummy ingot device are confirmed, casting and drawing are started, the alloy melt temperature in a heat preservation furnace is required to be controlled at 1300 ℃ in the drawing process, the melt height is kept to be more than one half of the height of the heat preservation furnace, the drawing-stopping-reverse pushing process is adopted in horizontal continuous casting, the drawing speed is controlled at 190mm/min, the outlet temperature of a casting blank is 310 ℃, the casting blank is drawn and cast into a coiled blank, and the specification of the coiled blank is 15mm in thickness and 400mm in width; in the continuous casting process, the water inlet pressure of cooling water is 0.2MPa, the water inlet temperature of the cooling water is 18 ℃, and the water outlet temperature of the cooling water is 50 ℃;

(4) milling surface

Milling the surface of the copper alloy continuous casting billet obtained in the step (3), and milling the upper and lower single surfaces to be 0.7mm in thickness;

(5) roughing cogging

Guiding the copper alloy billet obtained in the step (4) into a two-roller roughing mill, and rolling the billet at a rolling speed of 20m/min, wherein the single-pass processing rate is 92%, so as to obtain a rough rolling plate blank with the thickness of 1.088mm, which is converted into a recrystallized structure from a cast structure;

(6) multiple pass medium rolling

(7) multiple pass finish rolling

And (4) performing multi-pass finish rolling on the medium rolling plate blank obtained in the step (6), wherein the first pass finish rolling machining rate is controlled not to exceed 40%, the total machining rate is 57%, the rolling speed is 4m/min, and the thickness of a finished product is 0.08 mm. And annealing the finished product, wherein the annealing is carried out in an air cushion type continuous annealing furnace, the annealing temperature is 690 ℃, and the annealing speed is 80 m/min.

Example 3:

(1) the components (mass percent) of the strip foil blank are as follows: zn: 12%, Mn: 12%, Al: 0.9%, Sn: 1.1%, Ti: 0.1%, Si: 0.2%, B: 0.05%, Ce: 0.1%, the balance being an alloy of Cu and unavoidable impurities;

(2) melting

According to the designed component ratio of the white copper alloy, putting pure zinc, pure manganese, pure aluminum, pure tin, a copper-titanium intermediate alloy, a copper-silicon intermediate alloy, a copper-boron intermediate alloy, a copper-cerium intermediate alloy and electrolytic copper into a medium-frequency induction furnace for melting, skimming slag, then adding charcoal for covering, heating to 1230 ℃, taking a sample in the furnace, standing the converter after the spectral analysis components meet the requirements, skimming slag again, adding charcoal for covering, and fully standing for 25 minutes;

(3) horizontal continuous casting

After the normal operation of the whole set of equipment of the horizontal continuous casting machine and the flexible rotation of the dummy ingot device are confirmed, casting and drawing are started, the alloy melt temperature in a heat preservation furnace is required to be controlled at 1200 ℃ in the drawing process, the melt height is kept above one half of the height of the heat preservation furnace, the drawing speed is controlled at 150mm/min by adopting a drawing-stopping-reverse pushing process in the horizontal continuous casting, the outlet temperature of a casting blank is 280 ℃, the casting blank is drawn and cast into a coiled blank, and the specification of the coiled blank is 15mm in thickness and 400mm in width; in the continuous casting process, the water inlet pressure of cooling water is 0.5MPa, the water inlet temperature of the cooling water is 18 ℃, and the water outlet temperature of the cooling water is 40 ℃;

(4) milling surface

Milling the surface of the copper alloy continuous casting billet obtained in the step (3), and milling the upper and lower single surfaces to obtain the thickness of 1.0 mm;

(5) roughing cogging

Guiding the copper alloy billet obtained in the step (4) into a two-roll roughing mill, and rolling the billet at a rolling speed of 30m/min, wherein the single-pass processing rate is 93 percent to obtain a rough rolling plate blank with the thickness of 0.91mm and converted from a casting structure into a recrystallization structure;

(6) multiple pass medium rolling

(7) multiple pass finish rolling

And (4) performing multi-pass finish rolling on the medium rolling plate blank obtained in the step (6), wherein the first pass finish rolling machining rate is controlled not to exceed 40%, the total machining rate is 42%, the rolling speed is 16m/min, and the thickness of a finished product is 0.05 mm. And annealing the finished product, wherein the annealing is carried out in an air cushion type continuous annealing furnace, the annealing temperature is 640 ℃, and the air cushion furnace annealing speed is 90 m/min.

Example 4:

(1) the components of the strip foil blank (mass percent): zn: 13%, Mn: 13%, Al: 0.9%, Sn: 0.9%, Ti: 0.3%, Si: 0.12%, B: 0.15%, Ce: 0.1%, the balance being an alloy of Cu and unavoidable impurities;

(2) melting

According to the designed component ratio of the white copper alloy, putting pure zinc, pure manganese, pure aluminum, pure tin, copper-titanium intermediate alloy, copper-silicon intermediate alloy, copper-boron intermediate alloy, copper-cerium intermediate alloy and electrolytic copper into a medium-frequency induction furnace for melting, skimming, adding charcoal for covering, heating to 1250 ℃, taking a sample in the furnace, standing the converter after the spectral analysis components meet the requirements, skimming again, adding charcoal for covering, and fully standing for 35 minutes;

(3) horizontal continuous casting

After the normal operation of the whole set of equipment of the horizontal continuous casting machine and the flexible rotation of the dummy ingot device are confirmed, casting and drawing are started, the alloy melt temperature in a heat preservation furnace is required to be controlled at 1150 ℃ in the drawing process, the melt height is kept above one half of the height of the heat preservation furnace, the drawing-stopping-reverse pushing process is adopted in horizontal continuous casting, the drawing speed is controlled at 100mm/min, the outlet temperature of a casting blank is 210 ℃, the casting blank is drawn and cast into a coiled blank, and the specification of the coiled blank is 15mm in thickness and 400mm in width; in the continuous casting process, the water inlet pressure of cooling water is 0.4MPa, the water inlet temperature of the cooling water is 18 ℃, and the water outlet temperature of the cooling water is 30 ℃;

(4) milling surface

Milling the surface of the copper alloy continuous casting billet obtained in the step (3), and milling the upper and lower single surfaces to be 0.4mm in thickness;

(5) roughing cogging

Introducing the copper alloy billet obtained in the step (4) into a two-roll roughing mill, and rolling the billet at a rolling speed of 40m/min, wherein the single-pass processing rate is 91 percent, so as to obtain a rough rolling plate blank with the thickness of 1.278mm, wherein the rough rolling plate blank is converted from a casting structure into a recrystallization structure;

(6) multiple pass medium rolling

Carrying out multi-pass intermediate rolling on the rough rolling plate blank obtained in the step (5), wherein the processing rate of the first intermediate rolling is not more than 55%, the total processing rate is 77%, and the rolling speed is 15 m/min; and annealing the medium rolling plate blank in an air cushion type continuous annealing furnace, wherein the annealing temperature is 750 ℃, and the annealing speed of the air cushion furnace is 20 m/min. Carrying out multi-pass intermediate rolling again, wherein the processing rate of the first pass intermediate rolling is not more than 55%, the total processing rate is 73%, and the rolling speed is 8 m/min; annealing the medium rolling plate blank in an air cushion type continuous annealing furnace, wherein the annealing temperature is 650 ℃, and the annealing speed of the air cushion furnace is 60 m/min;

(7) multiple pass finish rolling

And (4) performing multi-pass finish rolling on the medium rolling plate blank obtained in the step (6), wherein the first pass finish rolling machining rate is controlled not to exceed 40%, the total machining rate is 49%, the rolling speed is 12m/min, and the thickness of a finished product is 0.04 mm. And annealing the finished product, wherein the annealing is carried out in an air cushion type continuous annealing furnace, the annealing temperature is 660 ℃, and the annealing speed is 100 m/min.

The nickel-free white copper alloy foil strips prepared in examples 1 to 4 were subjected to a color test and a discoloration resistance test of 36 hours of immersion in artificial sweat and 36 hours of corrosion in a salt spray environment, respectively, and the test results are shown in table 1.

TABLE 1 tints and color differences for nickel-free white copper alloy strip prepared in examples 1-4

As can be seen from table 1, the alloys of the four examples all have good white chromaticity and good resistance to discoloration in artificial sweat and salt spray environments.

8页详细技术资料下载

上一篇：一种医用注射器针头装配设备

下一篇：一种新型耐热铜合金的半连续金属铸造工艺及其应用

Nickel-free white copper alloy strip foil and preparation method thereof

相关技术

网友询问留言