WO2012075659A1

WO2012075659A1 - Zinc alloy for zipper chain and method for producing zipper chain

Info

Publication number: WO2012075659A1
Application number: PCT/CN2011/000129
Authority: WO
Inventors: 郭淑梅; 郭新营; 沈明; 周敏; 张儿; 邵瑜; 李良权; 肖金锋
Original assignee: 宁波博威合金材料股份有限公司
Priority date: 2010-12-08
Filing date: 2011-01-27
Publication date: 2012-06-14
Also published as: CN102011029B; CN102011029A

Abstract

Disclosed are a zinc alloy for zipper chain and a method for producing zipper chain. The zinc alloy is composed of 0.5-5 wt.% of copper, 0-4.5 wt.% of aluminum, 0.01-0.2wt.% of magnesium, and the balance X, Y, zinc and inevitable impurities. The X is at least one selected from the group consisting of 0.0001-0.5 wt.% of Bi, 0.01-0.19 wt.% of Ti, 0.001-0.3 wt.% of RE, 0.001-1 wt.% of Ni and 0.001-1 wt.% of Si. The Y is at least one selected from the group consisting group of Mn, Co, Nb, Zr, Cr, Ca, P, Sb, Te and Se.

Description

Method for preparing zinc alloy and zipper belt for zipper belt

The invention relates to a zinc alloy and an application thereof, and particularly to a method for preparing a zinc alloy for a fastener tape and a fastener tape. Background technique

The invention and application of zippers have a long history. At present, there are many varieties and styles of zippers, which are widely used in daily life such as clothing, shoes, hats, bags, tents, toys, etc., which bring great convenience to people. . A simple zipper that involves tape, chain elements, upper and lower stops, sliders and accessories, each of which involves a different material. The element material is the largest amount of material, mainly metal, plastic and nylon. The metal material used is mainly copper alloy. Commonly used copper alloys are H65, H68, H85, H90 and other brass and BZnl2-24 zinc white copper, which are in great demand. Copper alloys account for about 70% of the cost of zippers, and cost and resource issues are gradually facing a crisis. At present, there is no suitable metal material that can replace copper. It has been studied to use aluminum alloy or iron alloy instead of copper, but the aluminum alloy flat wire has a low zipper strength. To meet the subsequent surface treatment, it is necessary to wear metal in the toothed belt production. Line, to meet the subsequent plating coloring. Secondly, the aluminum alloy has a small specific gravity, the zipper is light, the thickness of the metal is heavy, and the firmness is not good, which affects the aesthetics of vision. Iron is easy to rust, it is easy to produce rust after washing, it pollutes clothes, and it cannot pass the needle test. The raw material cost of zinc is lower than that of copper. The specific gravity is higher than that of aluminum and slightly lower than that of copper. The melting temperature and annealing temperature of zinc are lower than that of copper, so the energy consumption of the product is low. If you can replace copper with zinc alloy material, not only can maintain the metal feel and elegance of the copper zipper, but also save copper resources that are scarce resources, but also reduce the cost of raw materials and the energy cost of the production process, but how to achieve the replacement is a big The problem is due to the special production method of the zipper belt, which requires that the alloy used must have suitable properties to meet the processing requirements. The applicant company's technicians studied the existing standard rolled zinc alloy and the deformed zinc alloy of the production wire, and found that they could not fully meet this requirement.

The production methods of the zipper tapes mainly include the lining method and the die casting method. The metal material is prepared by the lining method. The metal is first made into a metal flat wire or a Y-shaped wire. After being punched, punched, and rolled, the zipper tape is produced on the tape, and then pulled, and the polishing is performed. Finishing, coloring, cleaning of the ironing tape, and subsequent mounting of buckles, fittings and sliders. The die casting method is mainly used for producing non-metallic material zippers. In recent years, the method for producing zinc alloy zippers has also been used. For example, the "zipper and its manufacturing method" disclosed in Chinese Patent Application No. 03129499.5 is based on zinc alloy. The method of producing a zipper by die-casting injection molding, but the patent does not disclose the composition of the zinc alloy; the "metal zipper" disclosed in Chinese Application No. 200810070548.8, the composition of the alloy is: Mg 10-20%, Sn 45-65%, Al 20-40%, Zn 1-30%, the production method of the zipper is basically the same as that of the production of the plastic zipper, and the zipper teeth are directly cast on the tape with the molten alloy. Since the temperature of the metal is much higher than that of the plastic, the zipper tape is easy. It is burned out, so the casting speed is very slow. It is also necessary to water-cool the tape and the zipper tape. The production cost is high and the efficiency is low. It is not suitable for mass application in general. There are currently no zinc alloy zippers produced by the defensive process on the market, nor have patents or literatures for the production of zinc alloy zippers by the lining method have been retrieved.

The zipper tape is produced by the lining method. At present, the flat wire is mainly used in large quantities. To achieve the purpose of producing a zipper with a zinc alloy, it is necessary to provide a flat wire which can satisfy the zipper tape production method, and the zinc alloy used. It needs to have good deformation performance, can smoothly produce round wire, the round wire can be smoothly flattened or stretched, and the flat wire can smoothly pass through the exhausting process. The zippers produced, in addition to the mechanical properties required for zipper applications, require post-treatment requirements such as easy coloring, surface protection and zipper finishing.

The process of producing the zipper tape by the flat wire lining method is: the flat wire passes through the venting machine, firstly punches the concave and convex structure of the zipper tooth head, and then the sleeve is cut into a tooth having a Y shape, and the cloth is continuously fed. The belt passes through the Y-shaped slit and is then pressed against the tape. The cut surface of the flat wire is subjected to a forging deformation corresponding to the transverse forging process perpendicular to the rolling direction of the flat wire, which is the bad direction of the rolled product. After forging, the section becomes the surface of the zipper, the cut is flattened, and the element is even and full. The above process is completed quickly and the zipper tape is continuously produced, and the production efficiency is high.

The process of producing the zipper tape by the Y-line lining method is: rolling the Y-shaped wire with a round wire blank, and forming a concave-convex structure of the zipper tooth head after being punched and punched, and continuously feeding the tape from the Y-shaped Pass through the gap and then forge on the tape. The Y-line is subjected to a horizontal forging process. The above process is completed quickly and the zipper tape is continuously produced, and the production efficiency is high.

According to the above-mentioned zipper tape production characteristics, the zinc alloy wire for zipper must satisfy a certain deep drawability, have suitable ductility, punching property, strength and certain work hardenability. Otherwise, it may cause cracks in the mouth, burrs, crushing, crushing, broken teeth, deformation, poor bite force, etc., which cannot be used.

The copper alloy wire which is widely used in the prior art has excellent processing properties and good mechanical properties, and can be strengthened by processing deformation. Therefore, the zipper tape produced by the squirrel has a large bite force and is not easy to fall, and the zipper is The flat pull strength and single tooth displacement strength can reach a high standard. It is inferred that the zinc alloy used for the manufacture of the zipper should have the processing properties similar to that of the copper alloy, so that the zipper tape can be smoothly produced, and the zipper after the tie has good performance.

Because zinc is a close-packed hexagonal structure, there are few slip systems. Compared with zinc alloys and copper alloys, aluminum alloys have poor pressure processing properties, and there are few varieties of deformed zinc alloys. A large number of zinc alloys and their applications are mainly in die-casting alloys and Die casting products.

A large number of patents disclose a range of cast zinc alloys. The prior art zinc alloy is basically designed with a cast alloy, and does not take into account the special requirements of the exhausting process, and the standard rolled zinc alloy and the deformed zinc alloy of the production wire cannot fully satisfy the above requirements.

For example, Chinese Patent Application No. 02111557.5, "Zinc-aluminum-copper-magnesium alloy wire and its preparation method" discloses a production method and alloy for producing zinc alloy wire by extrusion stretching, the alloy composition is A1 3.9-4.3%, Cu2 .5-3%, MgO.004-0.01%, the balance is zinc and no more than 0.05% of impurities, except that other alloying elements are added to change the structure and properties. Chinese patent application with application number 200710035063.0 "a high-intensity Cutting zinc and its preparation process base alloy" discloses a high-strength free-cutting zinc alloy with alloy composition Cu2.5-2.65%, A10.20-0.35%, MgO.45-0.60%, LaO.01-0.06%, CeO.15-0.20%, the above-mentioned patented alloys are used for zipper flat wire production or zipper production of zipper tapes, which are not normally produced and are not suitable for zippers.

Zn-Cu alloy is the main rolling alloy, but pure binary alloy is rarely used. British patent GB1041541 "Zinc base alloys" discloses the addition of Ti, Mg, Cr alloys based on Zn-Cu alloy, excluding Al. Preferred compositions disclosed are CuO.95%, Ti0.21%, Mg0.07%, CrO.054% alloys, the highest tensile strength (58000 Psi) is 400 MPa, and the ratio limit is 25000 Psi (172 MPa). The alloy's proportional ultimate strength is too low. It has been verified by experiments that the alloy has a deformation hardening characteristic with a processing rate of less than 30%. When the processing rate is greater than 30%, the alloy begins to soften and the strength decreases, which cannot meet the processing requirements of the zipper.

Patent GB1336695 "ZINC ALLOYS" discloses a zinc-based alloy and a melting method of the alloy, but the alloy contains 0.01-0.03% of Cd, which increases the tensile strength, yield strength, creep strength and further strength of the alloy. The role of crystallization temperature, but Cd is a toxic element, which is harmful to the environment and health. The limit of the RoHS directive is less than 0.01%, so the alloy is not suitable for occasions closely related to the human body. Although it can be replaced by Be or Li, Be is more toxic during smelting, Li is volatile, has a large burning loss, is difficult to control, and is expensive, and the properties of the alloy after replacement are lowered. The patent has a high content of insoluble elements such as titanium and chromium. Although the alloy melting method is disclosed, the melting of insoluble elements is a major problem in the application of the alloy, and it is easy to form metal inclusions or coarse TiZnl5 phase particles, which makes the material performance sharp. It is getting worse. After several tests on the alloy composition disclosed in the patent, it was found that the allowable pass rate of the alloy during the drawing process was small, and as the processing rate increased, although the yield strength was not significantly reduced, the permitted path was The secondary processing rate is getting smaller and smaller, and it is easy to be broken or thinned, which is not suitable for tensile deformation.

Patent CN101660070A discloses "a zinc-copper-titanium multi-alloy functional structural material and a preparation method thereof". An alloy containing Cu, Al, Ti, B, Fe, the alloy of the disclosed example cannot be smoothly passed through a flat wire or after being discharged. Defective, magnetic, not suitable for production of zippers.

The invention aims at the process requirements and the zipper test requirements for the production of the zipper of the zipper line, and comprehensively considers the material properties and the process performance in the alloy design, and the inventive alloy can produce the zipper tape by the method of discharging the microphone. Summary of the invention

The technical problem to be solved by the present invention is to provide a zinc alloy which can replace the copper alloy and which can be used to produce a fastener tape for the zipper method in view of the state of the art.

Another technical problem to be solved by the present invention is to provide a method for producing a zinc alloy fastener stringer in view of the state of the art.

The technical solution adopted by the present invention to solve the above technical problems is: the zinc alloy for the fastener element, characterized in that the weight composition of the zinc alloy for the fastener element is as follows:

Cu 0.5-5%

A1 0-4.5% Mg 0.01-0.2%

The rest are X, Zn and unavoidable impurities, and the sum of the components is 100%;

Wherein X is selected from at least one of 0.0001-0.5% Bi, 0.01-0.19% 1⁄2 Ti, 0.001-0.3% RE, 0.001-1% Ni, and 0.001-1% Si.

Or:

The weight composition of the zinc alloy with the zipper tape can also be as follows:

Cu 0.5-5%

A1 0-4.5%

Mg 0.01-0.2%

The rest are X, Y, Zn and unavoidable impurities, and the sum of the components is 100%;

Wherein X is selected from at least one of 0.0001-0.5% Bi, 0.01-0.19% Ti, 0.001-0.3% RE, 0.001-1% M, and 0.001-1% Si;

The Y is at least one selected from the group consisting of 0.001 to 1% of Y1, 0.0001 to 1% of ruthenium 2, and 0.0001 to 1% of ruthenium 3; and the Y1 is at least one selected from the group consisting of Mn, Co, Nb, Zr, and Cr. In one case, the Y2 is at least one selected from the group consisting of Ca and P, and the Y3 is at least one selected from the group consisting of Sb, Te, and Se.

Preferably, the ratio of Cu to A1 is greater than one.

Preferably, as the above, X is selected from at least two of Bi 0.001-0.2%, Ti 0.015-0.18%, RE 0.001-0.15%, NiO.01-0.3%, and Si 0.001-0.3%.

Preferably, the X includes at least Ni and Si, and Ni / Si l.

Or the X includes at least Bi and Ti, or at least Bi, ^^ and Si.

In each of the above aspects, it is preferable that the content of the A1 is 0.005 to 0.5%, and the content of the Mg is 0.03 to 0.15%; or

The content of Cu is 0.6-3.5%, the content of the A1 is 0.51-1.9%, and the content of the Mg is 0.03-0.1%; or

The content of Cu is 1-2.45%, the content of the A1 is 0.41-0.99%, and the content of the Mg is 0.03-0.1%; or

The content of Cu is 2-2.9%, the content of A1 is 2-2.7%, and the content of Mg is 0.03-0.1%. In the present invention, copper is added as a main strengthening element to provide good creep resistance of the alloy, the intergranular corrosion sensitivity of the alloy is low, and the strength of the alloy increases as the copper content increases. The maximum solid solubility of copper in zinc is 2.7%. As the temperature decreases, the ε phase precipitates. This is a brittle phase. When it is distributed in a fine and uniform precipitate phase in the matrix, it has a strengthening effect. The performance is beneficial; in the presence of aluminum, the zinc-copper-aluminum phase is precipitated. If the precipitated phase is in the form of a network, although the alloy can smoothly roll the flat wire, the strength is not significantly reduced, but the crack occurs when the microphone is discharged. Tooth or tooth loss. Therefore, the content of copper and the ratio of copper to aluminum have a great influence on the process of discharging rice. If the copper content is too low, the strength of the alloy is lowered and the zipper tape production cannot be satisfied. The invention has obtained a minimum amount of copper after repeated tests. 0.5%, the maximum content should not exceed 5%, preferably not more than 3.5%.

A1 strengthens the alloy, improves the strength of the alloy, improves the fluidity of the casting, prevents oxidation, and improves the pressure processing properties. However, when the zinc-aluminum alloy is used as the zipper flat wire test, the softening effect is obvious and it is easy to be fractured. Therefore, this type of alloy is not suitable for the production of zipper flat wire, and it needs to be properly combined with copper to achieve the best strengthening and work hardening properties of the alloy. In the alloy containing copper as the main alloying element (Cu content is 0.5-5%), if the content of aluminum is copper, the above-mentioned network structure is easily precipitated by the preparation method of the present invention, and the alloy cannot be smoothly discharged, some alloys When cracking occurs during rolling, some alloys can pass the flattening process, but they cannot pass through the sintering process. Therefore, the amount of A1 is critical, and the ratio of copper to aluminum is preferably greater than one.

Ti can improve the mechanical properties, creep properties and softening temperature of the alloy, and it has different effects on the microstructure and mechanical properties of the alloys in different alloys. Ti and Zn, Ti and Cu, Ti and Al are all likely to form high melting point compounds. The ratio should be such that fine dispersed particles are formed in the alloy to avoid the formation of large mesophases and a reasonable smelting process is required. According to several experiments, according to the ratio of the main elements Cu and Al, the minimum addition amount of Ti is 0.01%, and the maximum is 0.19%. It is also possible to select the combination of elements of Ni I Si^ l without adding Ti. The same effect.

Magnesium has a small amount of solid solubility in zinc. When more than 0.005% Mg is added to the zinc alloy, the strength is increased. As the Mg content increases, the strength of the alloy increases, and the softening temperature increases, but at the same time the brittleness increases. Poor deformation performance. For alloys with a Mg content greater than 0.4%, the production of flat round billets cannot be carried out smoothly, and the flattening process is easy to be crushed. Considering the influence of the elements on the alloy, the content of Mg in the present invention is selected to be 0.01-0.2%.

It has been found that if Ni and Si are added in a single form, the alloy has a strengthening effect, which can increase the softening temperature of the alloy. The respective addition amounts are Ni 0.001-1%, Si 0.001-1%, preferably Ni0.01-. 0.3%, Si 0.01-0.3%. If Ni, Si, and Ni / Si l are added at the same time, the effect is better.

The zipper line has a breaking process in the process of discharging the microphone. The frequency is high and the speed is fast. If the punching performance is not good, it cannot be normally produced. The Bi added in the formulation of the present invention can improve the die-cutting property of the alloy, so that the punching during the discharge process is non-sticking and the fracture is smooth and free of burrs. Usually Bi is considered a harmful element in zinc alloys, which impairs hot rolling and cold rolling properties, but has less effect on corrosion. The present application determines a reasonable ratio by multiple tests, 0.0001 Bi 0.5%, preferably 0.001-0.2%, and rationally designs the preparation process, avoids the above defects, and improves the overall performance of the alloy. Sb, Te, and Se have similar effects.

In order to solve the problem that the zinc-based alloy hot extrusion process is difficult, the present invention adds a rare earth element RE to improve the high temperature ductility and hot workability of the alloy. The rare earth also has the function of strengthening the alloy. The rare earth compound is mainly segregated at the grain boundary, and the electrode potential is changed to inhibit the corrosion of the grain boundary. If the content is too large, large inclusions or pores are easily formed, so the maximum content of RE in the present invention does not exceed 0.3%.

The alloy provided by the invention has a Zn content of 99.99%, is insensitive to intergranular corrosion, is suitable for producing a zipper line, and meets the requirements of the squirting process.

A method for preparing a fastener tape using the above alloy, which is characterized in that a zinc alloy wire is first prepared, and then a zinc alloy wire is used. The zipper tape can be prepared by arranging the microphone. The specific method is as follows:

1 proportioned ingredients, after 500-600 Γ smelting, then refining at 600-750 ;; then using medium cooling to produce ingots;

2 The ingot is produced by extrusion, drawing or horizontal continuous casting, and then subjected to drawing to produce a round billet; the round billet is subjected to at least 2 annealing and rapid cooling heat treatment, and then multi-channel The secondary rolling is finally rolled into a flat wire finished product; wherein the rolling process is performed at least once; the cold working process includes heat treatment.

3 flat wire finished products are discharged through the microphone, and are rolled on the cloth tape to make a zipper tape.

4 The round billet is directly rolled into a Y-shaped line, and the zipper tape is made by discharging the microphone.

The refining is performed by flux refining and/or gas refining; the extrusion temperature is 300-38 (TC, and the extrusion ratio is not more than 100.

In the step 2, after the round billet is heat-treated, the processing rate of the deformation hardening characteristic is not less than 40%.

During the smelting process, the alloy is subjected to sufficient alloying smelting and refining. Since most alloying elements such as Cu, Ti, Ni, Si, etc. are high melting point metals, they are refractory elements. Sufficient alloying smelting and refining are required. After smelting at 500-600 °C and then refining at 600-75 CTC, the refining can be carried out by flux refining, aerated refining or flux refining and gas refining. The method of medium cooling and slow casting can be used to mass produce Φ 50-200 ingots by vertical continuous casting or horizontal continuous casting. The sawn ingot is extruded in a forward or reverse extruder at a temperature of 300-380 ° C and an extrusion ratio of not more than 100. The extruded billet is drawn to the round billet in multiple passes, then rolled and finally rolled into a flat wire. Or the round billet is rolled into a Y-shaped line. Due to the processing softening characteristics of zinc alloys, conventionally deformed zinc alloys can be multi-passed without intermediate annealing. For zipper line production, round billets require at least 2 annealing and rapid cooling heat treatments, and at least flat rolling processes are required. 1 annealing. The process can improve the pressure processing property of the alloy, make the material deformation uniform, uniform structure, no obvious texture influence, and ensure the smooth production of the zipper tape.

The heat-treated billet can be directly drawn or rolled without pickling. The heat treated strand has a processing rate of not less than 40% with processing hardening characteristics.

The zipper tapes made by the microphones can be used for subsequent coloring and protection, and can be processed into different colors. The invention effectively overcomes the problem that the zinc alloy is difficult to deform and the recrystallization temperature of the zinc alloy is low, the dynamic recrystallization occurs during the stretching process, and the processing softening occurs, and the deformation performance is good, the round wire can be smoothly produced, and the round wire can be smoothly It is rolled or rolled into a Y-shaped line, and the flat wire and the Y-shaped wire can smoothly pass through the squirting process. The produced chain belts are easy to color except for the mechanical properties of the zipper application, and meet the requirements of subsequent surface protection and zipper finishing.

However, compared with the prior art, the present invention is directed to the process requirements for producing a zipper and the performance requirements of a zipper, and comprehensively considers the material properties and process properties in the alloy design, and provides a good production and can have a good performance. Zinc alloys for zipper belts with rolling process properties, punching properties, punching properties and cold forging properties fill the gaps in the production of zipper belts that cannot be produced with zinc alloy. Compared with the alloys used in the production of zippers in the prior art, not only copper can be maintained The metal feel and elegance of the zipper are characterized by low raw material cost and low energy consumption in the production process. It can replace copper alloy and save copper metal with shortage of resources. At the same time, the preparation method of the zinc alloy for the fastener tape provided by the present invention is according to the characteristics of the zinc alloy. In the production process of the zipper line, the round wire blank needs to be subjected to at least 2 annealing and rapid cooling heat treatment, and the flat wire rolling process is at least The special treatment method of one-time annealing improves the pressure processing property of the alloy, makes the deformation of the material uniform, the structure is hooked, and has no obvious texture influence, effectively ensuring the smooth production of the zipper tape. In summary, the alloy and the production method of the invention ensure that the alloy not only has excellent tensile processing properties, but also has good rolling process performance, punching performance, punching performance and cold forging property, and can be smoothly carried out by the deflation method. Production of zipper tapes. detailed description

The invention is further described in detail below with reference to the embodiments.

The examples and the comparative examples are carried out according to the following methods: according to the alloy formula, after inductive electric furnace melting, ingot casting, ingot peeling to remove surface defects, after 300 ° C - hour or more, the steel strands are extruded into Φ 8.0 After a plurality of passes, including two annealing and rapid cooling heat treatment, a round wire blank is produced, and then flattened, and the flat wire blank is annealed, finally rolled into a zipper flat wire and subjected to a discharge test.

The composition of each of the examples and comparative examples is shown in Table I, and the process properties and test properties are shown in Table 2.

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Process performance and test performance

EXAMPLES 1-18 The dental tapes produced by the microphones can pass the test. Example 19

According to the design ratio, it is smelted in induction furnace, melting temperature is 500-600 °C, refining temperature is 600-750 C, refined with commercial refining agent, and continuous casting Φ 50 casting rod after refining.

The chemical composition analysis results of the cast rod were as follows (% by weight): Cu 2 .425 A1 2.0 72 Mg 0.100 Bi 0.0001 NiO.13%, Si 0.056°/. . The balance is Zn.

The cast rod saw was cut into the designed length, held at 300 Torr for 2 hours, and then extruded into a billet of Φ 8.0. The extruded billet is stretched in multiple passes, stretched to a rolled round billet, and subjected to two annealings and rapid cooling in the middle. It is then rolled to a flat wire blank and annealed during one time. The flat wire blank is rolled and made into a flat wire of 0.9 X 3.95 size. The finished flat wire is used to discharge the microphone on the microphone to produce a zipper tape. After the zipper belt is pulled, the finishing is performed, and the belt is hot. The performance results of the test are as follows:

Description: The production of the chain belt is completed on the copper alloy production line. The hot strip temperature is 180Ό, the alloy is softened, and flat. The tensile strength is reduced. If special equipment is used, the flattening strength can be reduced by appropriately reducing the hot strip temperature. Flat tensile strength without over-hot tape: 491-520 N

Flat pull strength after ironing: 340-385 N

Single tooth displacement force: 45-55 N

Folding force: 285-355 N

Pull and smoothness: 1.4N

Load pull: 700 double times

Needle test: 10 levels Example 20

Ingredients according to the proportion of design components, melting in induction furnace, melting temperature 500-600 ° C, refining temperature 600-750

V, using nitrogen refining, iron casting. The chemical composition analysis results are shown in Table 3 _:

Table 3 Example 20 chemical composition (% by weight)

After the ingot is passed through the wagon, it is kept at 300 ° C for 2 hours, and then extruded into a billet of Φ 8.0 with an extrusion ratio of not more than 100. The middle is subjected to 2 annealing and rapid cooling treatment. It is then rolled to a flat wire blank during which an annealing is performed. The flat wire blank is rolled and made into a flat wire of 0.9 X 3.95 size. The flat wire made is arranged on the microphone to smoothly produce the zipper tape. After the zipper tape is pulled, the subsequent coarse finishing is performed, and then the coloring treatment is performed, and then the bronzing chain is produced by ironing, protection and finishing. The performance results of the test are listed in Table 4:

Example 20 zipper mechanical property test results

Needle test: 10 steps Example 21, large ingot extrusion drawing example

The ingredients are smelted in an induction furnace, smelting temperature is 500-600 ° C, refining temperature is 600-75 (TC, refining is refined, and ingots are continuously cast Φ 200 after refining. The chemical composition analysis results are shown in Table 5:

Table 5 Example 21 chemical composition (% by weight):

The ingot saw is cut into the designed length, and the round billet is extruded in a 2500 ton reverse extruder, induction heating, extrusion temperature 360V, multi-head extrusion, and the extrusion ratio is not more than 100. The extruded billet is stretched in multiple passes with at least 2 annealings in between And rapid cooling treatment, and then flattened to a flat wire blank, during which an annealing is performed. The flat wire blank is rolled and made into a flat wire of 0.9 X 3.95 size. The flat wire is made on the microphone to produce a zipper tape. The zipper tape is colored and surface treated, and then ironed, protected and finished to produce a black chain. The performance results of the test are as follows:

Example 21 zipper mechanical property test results:

Embodiment 22 Y-line line microphone example

The round billet of the alloy of Example 21 was subjected to rolling to produce a Y-shaped line, and the Y-shaped line was used for the double-line row to smoothly produce the zipper tape. After finishing, the surface treatment is performed.

The flat pull strength of the chain belt reaches 500N or more, and the single tooth displacement strength reaches 50N or more.

Claims

Rights request

A zinc alloy for a fastener tape, characterized in that the weight of the zinc alloy of the fastener tape is as follows: Cu 0.5-5%

A1 0-4.5%

Mg 0.01-0.2%

Wherein X is selected from at least one of 0.0001-0.5% Bi, 0.01-0.19% Ti, 0.001-0.3% RE, 0.001-1% Ni, and 0.001-1% Si. '

2. A zinc alloy for a fastener tape, characterized in that the weight of the zinc alloy of the fastener tape is as follows: Cu 0.5-5%

A1 0-4.5%

Mg 0.01-0.2%

Wherein X is selected from at least one of 0.0001-0.5% Bi, 0.01-0.19% Ti, 0.001-0.3% RE, 0.001-1% Ni, and 0.001-1% Si;

The Y is at least one selected from the group consisting of 0.002 to 1% of YK 0.0001-1% of Y2 and 0.0001 to 1% of Y3; and the Y1 is at least one selected from the group consisting of Mn, Co, Nb, Zr, and Cr. The Y2 is at least one selected from the group consisting of Ca and P, and the Y3 is at least one selected from the group consisting of Sb, Te, and Se.

The zinc alloy for fastener tapes according to claim 1 or 2, wherein the ratio of Cu to A1 is more than 1.

The zinc alloy for fastener tapes according to claim 1 or 2, wherein the X is selected from the group consisting of Bi 0.001-0.2%, Ti 0.015-0.18%, RE 0.001-0.15% > NiO.01-0.3% And at least two of Si 0.001-0.3%.

The zinc alloy for a fastener tape according to claim 4, wherein the X includes at least Ni and Si, and Ni / Si l.

The zinc alloy for a fastener tape according to claim 4, wherein the X includes at least Bi and Ti, or at least Bi, Ni and Si.

The zinc alloy for fastener tapes according to claim 1 or 2, wherein the content of the A1 is 0.005 to 0.5%, and the content of the Mg is 0.03 to 0.15%.

The zinc alloy for fastener tapes according to claim 1 or 2, wherein the content of Cu is 0.6-3.5%, the content of A1 is 0.51-1.9%, and the content of Mg is 0.03. -0.1%. .

The zinc alloy for a fastener tape according to claim 1 or 2, wherein the content of Cu is 1-2.45%, the content of Al is 0.41-0.99%, and the content of Mg is 0.03-0.1%.

The zinc alloy for a fastener tape according to claim 1 or 2, wherein the content of Cu is

2- 2.9%, the content of the A1 is 2-2.7%, and the content of the Mg is 0.03-0.1%.

A method of producing a fastener tape using a zinc alloy for a fastener tape according to any of claims 1 to 10, which comprises the steps of:

1 proportionally, after smelting at 500-600 ° C, and then refining at 600-750 ° C; then using medium cooling to produce ingots;

2 The ingot is produced by extrusion or horizontal continuous casting, and then the round blank is produced by stretching; the round billet is subjected to at least 2 annealing and rapid cooling heat treatment, and then multi-pass rolling is carried out. , finally rolled into a flat wire finished product; at least one annealing treatment is performed in the rolling process;

The 4 round billet is rolled into a Y-shaped line, and then the microphone is discharged to produce a zipper tape.

A method of producing a fastener tape according to claim 11, wherein said refining is performed by flux refining and/or gas refining; said extruding temperature is 300-380 Torr, and the extrusion ratio is not more than 100.

The method of preparing a fastener tape according to claim 11 or 12, wherein in the step 2, after the heat treatment of the round wire blank, the processing rate of the deformation hardening characteristic is not less than 40%.