KR790000854B1 - Aluminum alloy wire - Google Patents

Abstract

An annealed aluminum alloy wire having a minimum conductivity of 61% IACS consisting essentially of 0.30-0.95wt.% Iron, 0015-0.15wt.% silicon, and the remainder being aluminium with associated trace elements, was described. The aluminum alloy wire has a characteristic of having Fe-Al metallic compound which dispersed a particle size shorter than 2000A.

Description

Arminium alloy wire

The present invention relates to an aluminum alloy lead suitable for use as an electrical conductor, and more particularly to an aluminum alloy lead having suitable electrical conductivity and improved elongation, flexibility and tensile strength.

The use of various alminium alloy wires (commonly referred to as EC wires) as general purpose electrical conductors already has a solid foundation in the art. In addition, the alminium alloy wire has been used as windings, multi-conductor wires and telephone cables for electromagnets.

The alloy used has a conductivity of at least 61% in accordance with international interworking standards (sometimes sometimes referred to as IACS) and its chemical composition is a significant amount of pure aluminum, vanadium, iron, copper, manganese, magnesium, zinc, boron and titanium. It contains a small amount of common impurities such as these. It has been proven that the physical properties of conventional alminium alloy wires are undesirable for various applications. In general, the desired elongation can be obtained only when the tensile strength is insufficient and the desired tensile strength can be obtained only when the elongation is insufficient.

In addition, conventional alminium alloy wires are not suitable for many other desirable applications because they are very low in flex and fatigue resistance.

Therefore, the need for an alminium alloy lead having improved elongation and improved tensile strength has emerged in the industry, and in particular, there is a need for a lead that can withstand numerous bends and maintain fatigue resistance during use.

Therefore, it is one of the objects of the present invention to provide an aluminum alloy lead having excellent conductivity and physical properties so that it can be used for new applications. It is yet another object of the present invention to provide an alminium alloy conductor having novel properties of increased maximum elongation and tensile strength, improved flex and fatigue resistance, and good electrical conductivity.

These objects, forms and advantages of the present invention will become apparent to those skilled in the art upon consideration of the following more detailed description of the invention.

According to the present invention, the alminium alloy electrical conductor wire is made from an alloy comprising about 99.70% by weight or less of aluminum, about 0.30% by weight or more, and about 0.15% by weight of silicon.

The preferred alminium content of the alloy is about 98.95-99.45, wt%, particularly when 98.95-98.45 wt% of aluminum is included. In addition, a suitable iron content of the present alloy is about 0.45 to 0.95% by weight, and particularly excellent results are obtained when it contains 0.50 to 0.80% by weight of iron. Silicon used in this alloy does not exceed 0.07% by weight.

The% ratio of iron and silicon is 1.99: 1 or better, and the good one is 8: 1 or better. Therefore, if the amount of iron in this aluminum alloy is in the low range of this range, the percentage of silicon should be increased without increasing the percentage of silicon beyond the above-mentioned marginal ratio. Appropriately treated conductors with an alminium alloy component within this range have moderate electrical conductivity, improved tensile strength and maximum elongation, as well as novel properties of surprisingly increased flex and fatigue resistance.

This alminium alloy is made of alloys by melting together the required amount of iron or other components needed for the process. The amount of silicon is usually such that it is kept as small as possible without adding during melting. In addition, ordinary impurities, that is, trace components are present in the melt, but each is present in a trace amount of less than 0.05% by weight, so that the total amount of impurities generally does not exceed 0.15% by weight. Of course, when controlling the amount of trace components, the conductivity of the best alloy must be taken into account. This is because some trace components affect the conductivity more than others.

Typical trace components are vanadium, copper, manganese, magnesium, zinc, boron and titanium. If the amount of titanium is relatively high (but very low compared to the amounts of alminium, iron and silicon), adding a small amount of boron to offset excess titanium will prevent the conductance of the conductor from decreasing.

Iron is the main component added to the melt to produce the alloy of the present invention. Usually about 0.50% by weight is added to the alminium component used to prepare the alloy.

Of course, some iron is added to control the amount of all alloying components in view of the present invention.

After alloying, the molten alminium composition is continuously cast into continuous bars. The bar is hot worked with acceptance from the casting machine. Typical hot working consists of casting the bar directly and then rolling the bar with a rolling mill.

The continuous casting and rolling process for producing a continuous rod is as follows.

The continuous casting machine solidifies molten aluminum alloy metal to make a casting bar which is moved from the continuous casting machine to the rolling mill while solidifying, and the rolling machine hot-forms the casting bar by giving practical movement to the casting bar along a plurality of angularly arranged axes. To form a rod or other hot formed body.

Continuous casting machines are conventional casting lubrication molds with casting lubrication and casting blemishes in which a lubrication belt supported by intermediate gears is fitted. The cast lubrication and the lubrication belt cooperate to move the mold from one end to which the casting ratio is radiated under the condition that the casting bar is solidified, to one end to pour molten metal to solidify.

Rolling mills are a commonly used type with a number of rolling stents arranged to hot mold the cast bar by a series of deformations.

The continuous casting machine and the rolling mill are positioned relative to each other so that the casting bar solidifies into the rolling mill substantially immediately after solidifying and solidifies in such a state. Under these conditions, the cast bar is at a thermoforming temperature within the temperature range for hot forming the cast bar at the beginning of hot forming without heating between the casting machine and the rolling mill.

If it is desired to control the hot forming temperature of the casting bar within the normal temperature range of the hot forming, the temperature adjusting device of the casting bar may be installed between the continuous casting machine and the rolling mill without departing from the inventive concept described herein.

The rolled stand has a plurality of rolls in which the cast bar is engaged.

The rolls of the rolled stand are two or several and are arranged to be opposite to each other or evenly spaced with respect to the flow axis of the casting bar through the rolling mill. The roll of each rolled stand of the rolling mill is rotated at a predetermined speed by the prime mover of one or several electric motors, and the casting lubrication is rotated at a speed determined by its operating characteristics. The rolling mill hot-forms the casting bar as it enters the rolling mill, resulting in a rod having a cutting area smaller than the cutting axis of the casting bar.

The circumferential surface of the roll of adjacent rolling stands in the rolling mill is changed morphologically; In other words, the casting bars are engaged in different directions by a series of rolls of rolled stands having different outer surfaces. This different engagement of the cast bar in the rolling stand acts to polish or mold the base metal in the cast bar in a manner that works in each rolling stand, while simultaneously reducing the cutting area of the cast bar to the cutting area of the rod.

As each rolled stand engages with the cast bar, it is desirable for the cast bar to enter the cast bar at a sufficient volume per hour in the rolled stand to fill the space formed by the roll of the rolled stand so that the roll acts effectively on the metal of the cast bar. However, the space created by the roll of each roll stand should not be overfilled so that the casting bar is not forced into the gap between the rolls. Therefore, it is preferable that the rods are supplied toward each rolling stand at a volume per unit time which is sufficiently filled with the space created by the rolls of the roll stand but is not overfilled.

Since the casting bar is accepted from the continuous casting machine, it has one wide face corresponding to the face of the circulating band and the taper side is tapered inwards corresponding to the groove shape in the casting wheel. As the cast bar is squeezed by the roll of the rolled stand, the cast bar is deformed to form a cut surface created by the adjacent circumference of the roll of each rolled stand.

As described above, a myriad of cast aluminum alloy rods having different lengths are produced by hot forming or rolling the cast aluminum bar simultaneously with the casting of the molten aluminum alloy.

The continuous rod produced by the casting and rolling process is compressed to draw continuous lines of various standard dimensions.

The cold drawn rod is cold drawn through a series of gradually smaller diameter dies without further annealing in order to create a continuous line of the desired diameter. After this tensioning operation, the alloy wire has very high tensile strength, its maximum elongation falls below the allowable limit, and its conductivity falls below the lowest allowable value of 61% of IACS. The wire is completely annealed or partially annealed to have the desired tensile strength and then cooled.

It has been found that the annealed alloy wires have excellent conductivity and surprisingly improved peak elongation, improved tensile strength and surprisingly increased flexural and fatigue resistance as described above in the specification. The annealing operation is suitable for continuous annealing such as resistance annealing, induction annealing, reflux annealing by a combustion furnace or heat dissipation annealing by a continuous furnace, or annealing in a batch furnace. When continuous annealing, the temperature is 232 ~ 648 ℃ and the time is about 5 ~ 1 / 10,000 minutes. Generally, however, continuous annealing temperatures and times are controlled in relation to the overall process within the range in which the desired tensile strength can be obtained.

In the case of discontinuous annealing, the temperature is kept at 204 to 398 ° C. for about 30 minutes to 24 hours. As mentioned in the continuous annealing, the time and temperature in the discontinuous annealing can be adjusted to suit the whole process within the range to obtain the desired tensile strength. The tensile strength of this arminium wire obtained for discontinuous annealing temperature and time is given in the following table.

TABLE 1

In such alloys a significant amount of iron present in the alloy during continuous casting precipitates out of the solution as iron ammonium intermetallic compound (FeAl ₃ ). Therefore, after casting, the bar contains FeAl ₃ diffused into the matrix of the supersaturated solid solution. The supersaturated matrix contains 0.17% by weight iron. As soon as the bar is hot rolled, the FeAl ₃ particles are destroyed and dispersed into the matrix structure, and formation of large particles is suppressed. When the rod is tensioned to the final size without intermediate annealing, and then aged in the final annealing operation, tensile strength, elongation, and flexibility are caused by the selective precipitation of FeAl ₃ at low lattice size and dislocation. Increased due to pinning. Therefore, the new transfer member must be activated under the stress of the tensile process, which causes further improvement in tensile strength and elongation.

The properties of this alminium alloy wire are greatly influenced by the size of FeAl ₃ particles in the matrix. Coarse precipitation promotes nucleation and growth of large particles, thereby lowering the recrystallization temperature of the alloy wire, thereby reducing elongation and bending rate. Microprecipitation improves elongation and bending by reducing nucleation and increasing recrystallization temperature. Severe coarse precipitation of FeAl ₃ will cause the alloy wire to crumble and become unusable. The coarse precipitation particle size is more than 2,000 mm 3 and the fine precipitation is particle size less than 2,000 mm 3.

Typical alloy AWG 12 of the present invention has a tensile strength of 11.2 kg / mm2, a maximum elongation of 20%, an IACS conductivity of 61%, and a number of bends to break of 20.

The physical properties of the AWG 12 line made from this alloy were about 8.4 ~ 15.4kg / mm2 of tensile strength, about 40 ~ 50% of maximum elongation, about 61 ~ 63% of conductivity, and about 45 times of bending to break. Is ~ 10.

When making special final products, adjustments can be made during the manufacturing process and additional steps can be carried out. When the insulated wire is manufactured, the rods produced continuously are tensioned from the AWG line 0000 (section diameter) or the maximum parallel face distance 11.684 mm) to the line 40 (the section diameter or the maximum parallel face distance 0.07874 mm).

After annealing, the aluminum alloy wire is continuously insulated in a standard continuous insulation process. A typical insulation process is to pass the leads through an extrusion head. As it passes through the extrusion head, a continuous thermoplastic insulation coating is applied to the conductor surface. The sheath is cooled by contact with an air stream or a cooling bath. The insulating material should be of sufficient thickness to insulate the conductors and be able to withstand the physical hazards of use. Typical insulation thickness is between about 0.40 and 1.19 mm. More suitable thermoplastic insulating materials are polyvinyl chloride and materials such as neoprene, polypropylene and polyethylene are also used.

Insulation coating AWG 12 line of the present invention has a poly-material having a tensile strength of 11.2kg / ㎜, maximum elongation 20%, conductivity IACS 61%, and the number of bending 30 to break. It has physical properties of AWG 12 line made from this alloy. The physical properties of the AWG 12 line produced from this alloy range from about 9.1 to 14 kg / mm2 of tensile strength, about 35 to 5% of elongation, about 61 to 63% of conductivity, and about 45 to 10 of flexural fractures. Preferred alloy wires for use in the present invention are between tensile strengths of 9.8 to 12.6 kg / mm 2, maximum elongation of 30 to 15%, conductivity of 61 to 63% and fracture bending times of 40 to 15.

In the case of manufacturing insulated telephone cable, continuous drawing is used to anneal the AWG 12 wire (section diameter or maximum parallel facet distance 2.0574mm) to AWG 30 wire (cross section diameter or 0.254mm facet maximum parallel face) and then anneal the alminium alloy wire. Insulate continuously in standard continuous insulation process. A typical insulation process is to pass an alloy wire through an extrusion head. As the alloy wire passes through the extrusion head, a continuous thermoplastic insulating coating is made on the surface of the conductor. The coating line is cooled by contact with an air stream or a cooling bath. The insulating material must have the ability to insulate the alloy wires, and the thickness must be sufficient to insulate the alloy wires and to withstand the physical hazards of processing the alloy wires with telephone wires. Typical insulation thickness is about 0.0254 to 5.08 mm. More suitable insulators are polyethylene and materials such as neoprene, polypropylene and polyvinyl chloride are also used.

Insulate the wires individually and then tie two or more (insulated wires together and pull them together as a pair. These pairs are cabled into groups and these groups become larger groups or cables.

This group or cable is fed to the second extrusion head where it is insulated and sheathed around each insulated wire.

A thin sheet of plastic material or tape may be wrapped around the military or cable prior to insulated sheathing. The insulated telephone cable exits from the second extrusion head and is cooled by contacting the airflow or cooling bath. Suitable external insulation materials are polyethylene, together with polypropylene, polyvinyl chloride and neoprene superplastics. If necessary, the finished telephone cable may be sheathed once again according to conventional methods.

Representative AWG 18 line of the Alminium alloy wire suitable for use in the telephone cable of the present invention has physical properties of 11.9kg / mm2 tensile strength, 14% maximum elongation and 61% conductivity IACS. The general physical properties of the AWG 18 line made of this alloy range from about 9.1 to 15.4 kg / mm2 of tensile strength, about 40 to 5% of maximum elongation, and about 61 to 63% of conductivity. Preferred alloys have a tensile strength of 11.2 to 12.6 kg / mm 2 maximum elongation of 20 to 10% and conductivity of 61 to 63%.

In order to manufacture windings for insulated electromagnets, continuous drawing shall be made from AWG 8 wire (section diameter or maximum parallel face distance 3.2512mm) to AWG 40 wire (section diameter or maximum parallel face 0.07874mm).

The microannealed rod is cold generalized through a series of progressively compressed dies to produce a continuous line of the desired diameter without intermediate annealing. If the cross section is not desired to be round, a suitable die may be made by cold rolling the tensioning line or by stretching through a suitable rolling mill or die.

Typical cuts other than round shapes are polygons and rectangles. After annealing, the aluminum alloy wire is continuously insulated by a standard insulation process. A typical insulation process is to bake a continuous enamel insulation film in a continuous furnace by passing an enamel bath. Insulation enamel must have sufficient insulation and its thickness must be able to withstand the physical hazards of use. Suitable insulating materials include enamels such as oil-based resins, fibers, polyethylene polypropylene, polyvinyl chloride, polyurethane, epoxy, polyvinyl formalin resin, nylon coated polyvinyl formalin resin, urethane modified polyvinyl formalin resin, polyurethane Nylon coated on modified polyester coated on linear polyester. Polyimide resins, cotton fibers and polyesters can be used.

When thermoplastic resin is used as insulation material, it is common to cover the wire as it moves through the head by using the extrusion head.

The representative insulated electromagnet winding AWG 12 of the present invention is manufactured from a line having a tensile strength of 11.2 kg / mm 2, a maximum elongation of 20%, a conductivity of 61% IACS, and a breakage recovery number of 30. The range of physical properties of AWG 12 produced from this alloy ranges from about 8.4 to 11.9 kg / mm2 of tensile strength, about 40 to 15% of ^two draws, 61 to 63% of conductivity, and 45 to 15 fracture bends.

Preferred alloy wires for use in the present invention are tensile strength 9.1 to 10.5 kg / mm 2 maximum elongation 35 to 25%, conductivity 61 to 63% and flexural recovery 35 to 20.

When manufacturing multi-conductor wires made of a plurality of filaments, the continuous drawing is performed to form a single wire between AWG0000 (section diameter or maximum parallel face distance 11.684mm) to AWG 40 (section diameter or maximum parallel face distance 0.07874mm). After each filament wire is twisted together with other wires, a multi-conductor wire made of multiple filaments is produced and subsequently insulated in a standard continuous insulation process.

A typical insulation process is to pass a twisted wire through the extruder head. As the conductor passes through the extruder head, it is continuously coated around the lead of the thermoplastic insulating coating. The coated conductor is cooled by contact with air stream or cooling bath. Insulating materials should be able to insulate the multiple stranded conductors and the thickness of the insulators should insulate the conductors and withstand the physical hazards of the conductors. Typical thickness of insulator is about 0.025 ~ 1.00mm. Preferred thermoplastic insulating materials are polyvinyl chloride or neoprene, rubber, polyethylene, polypropylene and crosslinked polyethylene and the like.

Typical AWG 12 for multi-conductor wires has physical properties of 11.2kg / mm2 tensile strength, 20% maximum elongation, 61% conductivity IACS, and 30 times of fracture flexion. The general physical properties of the AWG 12 wire made of this alloy range from about 9.1 to 15.4 kg / mm2 of tensile strength, about 30 to 15% of maximum elongation, about 61 to 63% of conductivity, and about 45 to 10 times of fracture bending. The tensile strength is 9.1 ~ 12.6kg / mm2, the maximum elongation is 30 ~ 15%, the conductivity 61 ~ 63% IACS, and the number of fracture bends is 40 ~ 15.

Conductors made from this alloy may be joined together in a stranded manner such as concentric, aggregate, parallel and rope before each insulation. In the concentric type, six or more single wires are spirally twisted around one central wire, and the insulation coating is applied to the outer circumferential surface of the stranded wire through the extrusion head of the extruder.

In the collective model, a plurality of disconnected wires are twisted together somewhat and insulation coating is performed on the outer surface thereof.

In parallel softening, insulation coating is to be carried out with each alloy wire tied together without twisting.

In rope type, twisted pair cables are twisted into several concentric or collective strands to form a composite cable, which is entirely insulated on its outer surface.

Insulated stranded cables of this alloy have been demonstrated to have superior flexibilities than those of ordinary insulated strands and EC alloys.

In the following examples the invention will be more fully understood.

Example 1

Comparison of the known EC alniumium wire with the alminium alloy wire of the present invention is 99.73% by weight of alminium, 0.18% by weight of iron, 0.059% by weight of silicon and 99.45% by weight of conventional EC alloy and alminium, including trace amounts of impurities, This alloy wire was performed with 0.45 weight% iron, 0.056 weight% silicon, and a trace amount impurity. These alloys are continuously cast and cold-rolled to make AWG 12. The cutting alloy wires are collected in separate bobbins and annealed in a batch furnace at various temperatures and times to produce conventional EC alloys and present alloys of various tensile strengths. Experiment with a device to measure the number of bends required to break at specific bending points. With uniform force and tension, the device curves each sample at about 135 degrees. The alloy wire is decorated over a pair of mandrels facing each other with a diameter equal to the diameter of the alloy wire. The spacing of the mandrels is at a distance of 1 to 1.5 times that of the alloy wire. From the vertical position of the alloy wire to one extreme, to return vertically, to the opposite extreme; Once returned to the original vertical position, one bend is recorded. For all test samples the rate of flexion and the forces and tensions acting on them are the same. The following results were obtained.

TABLE IIA

EC alloy pattern alloy

As shown in Table II A, this alloy has surprisingly improved bendability over conventional EC alloys.

Samples of this alloy AWG 12 and EC alloy AWG 12 treated as described above are tested for maximum elongation according to standard test methods. The elongated length of the alloy wire is measured at break. Maximum elongation is calculated by dividing the increased length of the alloy wire sample by the original length. The tensile strength of an alloy wire sample is the force required to break in the maximum elongation test, expressed in pressure per cross-sectional area. The result is as follows.

TABLE II B

As shown in Table II B, this alloy has a surprisingly improved maximum elongation than conventional EC alloys.

Example 2-7

Six arminium alloys are produced by varying the amount of active ingredient. These alloys are described in the following table.

TABLE III

The six alloys were continuously cast into six bars and hot rolled into six continuous rods. Cold drawn through a progressively compressed die to create an AWG 12 line. Alloy wires made from the alloys of Examples 2 and 4 were subjected to resistance annealing and the remainder to an annealing furnace to obtain tensile strength as described in Table IV. After annealing, each alloy wire was tested for conductivity, tensile strength, maximum elongation, and average number of bendings. Except for using the method described in Example 1 to determine the average number of flexures to break after slow cooling, the standard test method is used to measure the conductivity, tensile strength, maximum elongation and mean flexure to break. Each was tested for recovery.

These results are shown in the following table.

Table IV

From these results, it can be seen that the line of Example 2 is inferior in both the elongation and the bendability as compared to the other because of the outside of the component range of the present invention.

Example 8

An alminium alloy is prepared which contains 99.42 weights of almininium, 0.50 weight percent iron, 0.55 weight percent silicon and trace amounts of common impurities.

The continuous bar is cast by hot rolling and hot rolled to manufacture a continuous rod.

Cold drawn through a progressively compressed die to create AWG 12. Alloy wires were collected on a 76 cm (30 inch) bobbin until they weighed about 113 kg.

The bobbin is placed in a cold General Electric Bell and the temperature is raised to 249 ° C. The temperature is maintained for 3 hours and then cooled to 204 ° C. The furnace is then quenched and the bobbins are removed. The test results revealed that the alloy wire had a conductivity of 61.5% IACS, a tensile strength of 11.55 kg / mm 2, a maximum elongation of 20%, and a number of bends of 18 to break.

Example 9

The same procedure as in Example 8 was carried out except that the temperature of the bellows was raised to 260 ° C. and maintained for 3 hours before cooling. The annealed alloy wire has a conductivity of 61.4% IACS, a tensile strength of 10.5kg / mm 2, a maximum elongation of 27%, and a number of bends of 28 to break.

Example 10

The treatment was carried out in the same manner as in Example 8 except that the temperature of the bellows was raised to 316 ° C. and maintained for 3 hours before cooling. The annealed alloy wire has a conductivity of 61.2% IACS, a tensile strength of 9.85kg / mm 2, a maximum elongation of 30%, and a number of bends of 43 to break.

Example 11

The treatment was carried out in the same manner as in Example 8 except that the temperature of the bellows was raised to 310 ° C. and maintained for an hour and a half before cooling. The annealed alloy wire has a conductivity of 61.5% IACS, a tensile strength of 11.2kg / mm2, a maximum elongation of 21%, and a bending recovery number of 23.

Example 12

The alloy of Example 8 was cast to make a continuous bar and then hot rolled to produce a continuous rod of 0.95 cm. (3/8 inch) diameter. The rod was cold rolled through a gradually compressed die to prepare an AWG line 14. This is re-tensioned on a synchro model BG-16 with a continuous resistance annealer. The alloy wire is tensioned with AWG 28 at a final speed of 1,000 m / min and the annealer is secured to the transformer tap at number 8 and operated at 52 volts. Annealed alloy wire has a conductivity of 62% IACS, a tensile strength of 10.8kg / mm2, and a maximum elongation of 25%. Since the diameter of the alloy wire is very small, the number of bends leading to breakage is quite large.

Example 13

An alloy of the same component as in Example 8 was cast to form a continuous bar and hot rolled to produce a continuous rod having a diameter of 0.95 cm (3/8 inch). Cold drawing is performed using a synchro-type F × 13 drawing machine equipped with a continuous annealer. The final speed shall be 610m / min to AWG 12, the preheater No. 1 voltage is 35 volts, the preheater No. 2 is 35 volts, and the annealer is 22 volts. The three transformer taps are fixed with five. The conductivity of the annealed alloy wire is 62% IACS, tensile strength 11.4kg / mm2, and maximum elongation 20%.

Example 14

Insulated wire

The alminium alloy is 99.42% by weight of alminium, 0.50% by weight of iron, 0.055% by weight of silicon and is prepared to be present in trace amounts. The alloy is cast into continuous bars and hot rolled to produce a continuous rod. This is cold drawn through a die that is gradually compressed into an AWG 12 line. The line is collected on a 76 cm (30 inch) bobbin until the line weighs approximately 113 kg. Place the bobbin in General Electric Bellows and raise the temperature to 249 ° C. The furnace temperature is kept at 249 ° C. for 3 hours and when the heat is lost the furnace is cooled to 204 ° C.

The furnace is then quenched and the bobbin removed. The annealed wire is passed through an extruder head and insulated with polyvinyl chloride. Test results show that the insulated alloy wire has a conductivity of 61.6% IACS and has physical properties to be improved.

Example 15

Insulated wire

The alloy of Example 14 was cast into continuous bars and hot rolled to produce a continuous f temper rod of 0.95 cm (3/8 inch) in diameter. It is cold drawn with a model F × 13 stretching machine with a synco equipped with a continuous annealer. The final speed is drawn at 915m / min to AWG 12, the continuous annealing device voltage is 35 volts in preheater 1, 35 volts in preheater 2 and the annealing device is operated at 22 volts. Secure the three transformer taps to five. The annealing line is passed through an extruder head and continuously insulated with polyvinyl chloride. Annealed and insulated wires have a conductivity of 62% IACS and have improved physical properties.

It should be understood, in part, that the present invention relates to insulated conductors of arminium alloys. Within the scope of what is referred to as "insulated conductors" are insulated cables consisting of individual highly insulated alminium alloy conductors. Special examples of special insulated wires or cables formed by the present invention include building wires, NM design cables, underground construction wires, distribution cables, TW-type single wires, harness wires, neon sign cables, wireless connection wires, and method fire alarms. There are wires, buried wires, control wires, machine tool wires, enunciator wires, DD wire wires, and railway signal cables.

Example 16

Insulated telephone cable

An alminium alloy is prepared in which 99.42% by weight of aluminum, 0.50% by weight of iron, 0.055% by weight of silicon and trace amounts of common impurities are present. The alloy is cast into continuous bars and hot rolled to make a continuous rod. Cool drawn through a progressively compressed die to form AWG 12. Gather the wires in a 76cm (30inch) bobbin until the gathered wire weighs approximately 113kg. The bobbin is then placed in a cold general electric bellows and the temperature is raised to 249 ° C. The temperature of the furnace is kept at 249 ° C. for 3 hours and then the furnace is cooled to 204 ° C. Then quench the furnace and remove the bobbin. The annealed wire is passed through an extruder head and insulated with polyethylene. Each of the two insulated wires are bundled together untwisted and sent to a second extruder head, which is then insulated and covered with polyethylene.

Example 17

Insulated telephone cable

The alloy of Example 16 was cast into continuous bars and hot rolled to produce a continuous f temper rod of 0.95 cm (3/8 inch) in diameter. Cold drawn with a model F × 13 stretching machine using a syncograph with a continuous annealing device. The final speed was drawn at 610m / min to AWG 12, with a continuous annealer voltage of 22 volts in preheater 1, 35 volts in a preheater 2 and 22 volts in an annealer. Three transformer taps are fixed at five. The annealed wire is passed through an extruder head and continuously insulated with polypropylene. Each of the eight insulated wires is typically twisted together and fed to a second extruder head which is sheathed with polypropylene.

Each wire of the telephone cable can be treated to have a tensile strength that can withstand the forces applied during the insulation process using polyethylene as the insulating material. Since polyethylene is a standard insulating material, each alloy wire should be able to insulate as dipolyethylene.

However, if polyethylene is used as an insulating material, the maximum elongation is increased and the flexibility is improved while the tensile strength is decreased. In this particular form, the tensile strength is lowered because the alloy wire cannot pull the alloy wire from the extruder head with a strong force when polyethylene is used as the insulating material.

In addition, when two or more insulated wires are used as telephone cables, the alloy wires are twisted in the form of lumber cores, aggregates, crossovers, expansions and ropes or in pairs to form cables. After being twisted or cabled, the alloy wire is insulated as described above. The number of wires in the cable of the present invention is not limited and may be taped or sheathed before extrusion or tubing.

Example 18

Insulation electromagnet winding

The alminium alloy is prepared by including 99.42% by weight of aluminum, 0.50% by weight of iron, 0.055% by weight of silicon, and a small amount of common impurities. The alloy is cast into continuous bars and hot rolled to produce a continuous rod. Cold drawn through a progressively compressed die to create an AWG 12 line. The alloy wire is collected in the bobbin until the gathered wire weighs about 113 kg.

Place the bell in a cold general electric bellows and raise the temperature to 249 ° C. The furnace temperature is maintained at 249 ° C. for 3 hours and the furnace is cooled to 204 ° C. The annealed wire is insulated with enamel by passing through the enamel lust. The test results showed that the insulated alloy magnetic wire had a conductivity of 61.6% IACS, a tensile strength of 11.6kg / mm2, and a maximum elongation of 19.8%.

The most interesting fact about this electromagnet alloy wire is that the annealing treatment increased the elongation at higher tensile strength than the annealed EC alloy wire. In addition, in order to improve the elongation when annealing the EC alloy wire, the alloy wire must be completely softened. As the alloy wire of the present invention increases the annealing time and temperature, the elongation is gradually improved and excellent elongation is obtained even if the alloy wire is not completely softened.

Example 19

Insulation

An alminium alloy is prepared which contains 99.42% by weight of alminium, 0.50% by weight of iron, 0.055% by weight of silicon and trace amounts of common impurities. The alloy is cast into continuous bars and hot rolled to form a continuous rod. Cold drawn with progressively compressed dice to form AWG 12. The alloy wires are collected in a 76 cm (30 inch) bobbin until the weight of the gathered wires is about 113 kg. Place the bobbin in a cold general electric bellows and raise the temperature to 249 ° C. The furnace temperature is maintained at 249 ° C. for 3 hours and cooled to 204 ° C. The annealed wire is twisted concentrically with six other wires produced in the same way. The twisted unit is passed through an extruder head to insulate with polyvinyl chloride. The test results show that the insulated multi-conductor alloy wire has 61.6% conductivity IACS and improved physical properties.

Example 20

Insulated conductor

An alminium alloy is prepared which contains 99.42% by weight of alminium, 0.50% by weight of iron, 0.055% by weight of silicon and traces of typical impurities. The alloy is cast into continuous bars, which are then hot rolled into continuous rods. Cold drawn through a die that is gradually compressed without intermediate annealing to form AWG 12. Twist concentrically with the six other wires produced in the same manner. Collect the gathered wires into 76cm (30inch) bobbins until the weight is about 113kg. The bobbin is placed in a cold general electric bellows, the temperature is raised to 249 ° C. for 3 hours, the furnace is cooled and the bobbin removed. The twisted unit is fed from the bobbin to the extruder head and insulated with polyvinyl chloride. It was found by testing that the insulated alloy wire of multi-conductor wire had a conductivity of 61.6% IACS and improved physical properties.

It should be understood that the present invention relates, at least in part, to insulated alminium alloy conductors.

Special examples of specially insulated multi-conductor wires and cables include construction cables, automotive ignition primary wiring cables, underground structure wiring cables, battery cables and battery cables underground lines, aircraft cables, harness cables, neon sign cables, wireless connection cables, method fire alarm cables. , Buried wire, control cable, cable for machine tool, innator cable, heater cord, lamp cord, electric cord, welder and mine cable, tow truck cable, external cable, SEU cable insulated with cross-linked polyolefin, overhead cable Shipbuilding cables, appliance cabling cables and iron or alminium alloys have a combination of aluminium or copper as the center line.

In the case where the purpose of the present invention is clearly clarified and there is no particular point in the specification, the predicate meaning used in the present specification is as follows. Solid products that are longer than rod-sections and usually have a cross section of 7.62 to 0.95 cm.

It is a machined product of solid length longer than wire-section, and its cross section is circular, square, rectangular, regular hexagon and square octagon. Its cross sectional diameter or maximum parallel facing distance is in the range of 0.95 to 0.007874 cm.

While the invention has been described in particular detail with respect to preferred embodiments, it is to be understood that changes and modifications can be made within the spirit and scope of the invention.

Claims (1)

Annealed aluminum alloy wire having a conductivity of at least 61% or more of the International Interlocking Standards (IACS), 0.30 to 0.95 weight percent of iron, 0.015 to 0.15 weight percent of silicon, and traces of ordinary impurities and residues of aluminum. , An aluminum alloy wire product comprising an iron aluminum intermetallic compound uniformly distributed with a particle size of 2,000 angstrom units or less.