CN102899594B - Manufacturing method of aluminum foil used for 1060 alloy cable - Google Patents

Abstract

The invention relates to a manufacturing method of aluminum foil used for a 1060 alloy cable. The manufacturing method sequentially comprises the following steps: a. smelting; b. roll casting, controlling the thickness to be 6.8-7.0mm; c. cold rolling and cogging, rolling the thickness to be 3.0-4.0mm; d. intermediate annealing at 500-550 DEG C, and lasting for 20-24h; e. roughing, roughing the thickness to be 0.5mm for longitudinal edge shearing; f. finish rolling, after 2-3 passes, rolling to obtain a finished product with the thickness of 0.18-0.2mm; and g. finished product annealing, adopting a gradient differential temperature annealing method for a low-temperature purging period at 200-220 DEG C with the heat preservation time of 2-4h, an intermediate-temperature oil removal period at 240-260 DEG C with the heat preservation time of 8-10h, and a high-temperature yellow spot removal and mechanical property stabilizing period at 380-400 DEG C with the heat preservation time of 8-10h. The manufacturing method is simple in manufacturing process and low in cost, and can enable the elongation to be greater than or equal to 23% simultaneously when obtaining low tensile strength and completely meet the parameter requirements for the aluminum foil used for high-quality cables.

Description

The manufacture method of aluminium foil for 1060 alloy cables

Technical field

The present invention relates to the manufacture of aluminum alloy materials, specifically the manufacture method of aluminium foil for a kind of 1060 alloy cables.

Background technology

For aluminum foil for electric cable, preferably performance perameter is conventionally: tensile strength 70-110MPa, unit elongation is greater than 20%.Conventionally adopt at present the material of 8011 alloys as aluminum foil for electric cable, although but adopt the aluminum foil for electric cable unit elongation of 8011 alloy materials can meet service requirements, but its tensile strength is conventionally at 110-120MPa, manufacturing process can reach 100 MPa preferably, but still cannot meet higher service requirements.And the cost of 8011 alloy materials is also higher.For 1060 alloys, the aluminium foil that adopts common processing method to manufacture, its tensile strength can meet the requirement of aluminum foil for electric cable, but its unit elongation is too low, conventionally can only reach 15-20%, cannot be used as aluminum foil for electric cable.

Summary of the invention

Technical problem solved by the invention is that a kind of manufacture method that can manufacture with 1060 alloy materials aluminum foil for electric cable, tensile strength and the 1060 alloy cables aluminium foil that unit elongation performance can meet the demands, cost is low is provided.

1060 alloy cables of the present invention comprise the following steps successively by the manufacture method of aluminium foil:

A. melting, adopts 1060 alloy materials to carry out melting;

B. casting, casting finished product thickness is controlled at 6.8-7.0mm;

C. cold rolling cogging, when blank temperature is less than 40 DEG C, upper milling train is produced, and is rolled down to 3.0-4.0mm thickness;

D. process annealing, is set in 500-550 DEG C by furnace gas temperature, keeps 20-24 hour after furnace gas temperature reaches design temperature, and insulation is opened other cooling system after finishing and lowered the temperature, and treats that furnace gas temperature is down to 200 DEG C and comes out of the stove below, naturally cooling after coming out of the stove;

E. roughing, material after process annealing volume temperature is down to 40 DEG C and is carried out roughing after following, and roughing to 0.5mm thickness carries out slitting trimming;

F. finish rolling, 2-3 passage of process is rolled down to the finished product of 0.18-0.2mm thickness;

G. finished products, adopts ladder differential temperature annealing way, low temperature purge section 200-220 DEG C, and soaking time 2-4 hour, middle temperature oil removing section 240-260 DEG C, soaking time 8-10h, high temperature is except macula lutea and stable mechanical property section 380-400 DEG C, soaking time 8-10h.

The present invention adopts 1060 alloy materials to manufacture aluminum foil for electric cable, its manufacturing process is simple, cost is low, simultaneously by special technique setting, can be in obtaining low tensile strength, unit elongation is more than or equal to 23%, hardness is less than 23HV, completes the parameter request that can meet high-quality aluminum foil for electric cable.

Embodiment

The step of the embodiment of the present invention is as follows:

1, melting

Melting adopts 1060 fine aluminium ingots, must accomplish degasification, slagging-off totally, stirs full and uniform; Leading furnace temperature is controlled within the scope of 720-740 DEG C; Fusion process does not add master alloy and other metal additives, ensures melt quality.

2, casting

When casting is produced, guarantee that surface is without defects such as black silk secret note, hole, slag inclusion, scratch, scuffings.Casting finished product thickness is controlled at 6.8-7.0mm, for follow-up rolling process distributes rational rolling pass and arranges suitable annealing thickness to prepare.Staggered floor, scarce aluminium, cold limit phenomenon that casting volume end face must not have impact to use; The casting volume of having produced must be placed on above pallet, does not allow to be placed directly on ground.

3, cogging

When cold rolling cogging, must check work roll surface quality, guarantee, without defects such as scuffing and hard defects, to wipe clearly deflector roll guide passage and check whether each deflector roll rotates flexibly, avoid causing wiping scratching; When cogging, aluminium volume surface does not allow elongated or discontinuity scratch, scuffing, hard defects etc. to have the surface imperfection of feel; Surface purging must be clean, do not allowed residual greasy dirt; When cogging, blank temperature must be less than milling train production in 40 DEG C of ability; While being rolled down to 3.5mm thickness, turn homogenizing annealing operation, before transhipment, must will expect to roll up with 3 and above steel band urgent, avoid expecting in transport process unwinding layer.

4, process annealing

To expect that the upper high-order bin of volume adopts the long-time homogenizing annealing of high temperature, furnace gas temperature is set in to 530 DEG C, employing full power heats up, after reaching design temperature, furnace gas temperature keeps 22 hours, after insulation finishes, opening other cooling system lowers the temperature, treat that furnace gas temperature is down to 200 DEG C and comes out of the stove below, after coming out of the stove, stock shelf is cooling, avoids the condition of high temperature whereabouts ground surface adhesion of material volume.

5, roughing

After being down to below 40 DEG C, material volume temperature after homogenizing annealing carries out roughing, before roughing, must more renew working roll, guarantee that roller surface is without scar, clear wiping deflector roll guide passage also checks whether each deflector roll rotates flexibly, avoid causing surface to wipe the defects such as scuffing, roughing to 0.5mm thickness carries out centre trimming.

6, slitting trimming

When slitting carries out centre trimming, material volume temperature must be 40 DEG C of following square productions that be available on the machine, in production process, supplied materials surface and plate shape are checked, and guarantee that this operation does not produce new defect, monolateral trimming width is at 10-50mm, guarantee that end face is neat, without raw edges, burr, flange, staggered floor, turriform etc.

7, finish rolling

Work in-process after slitting trimming are rolled down to the finished product of 0.18mm thickness through 3 passages, finished product must guarantee that plate shape is smooth, being beneficial to point cutting process produces, surface purges clean, avoid surface band oil to cause finished products to produce macula lutea more, often be rolled into product and must check surface quality, guarantee that surface is without defects such as bright line, aberration, black silk secret note, wiping scuffing, hole, slag inclusions.

8, finished product is cut

While cutting, conscientiously supplied materials is checked, avoid defect to bring finished product volume into, and wipe clearly each deflector roll guide passage, guarantee that aluminium volume surface is without impression, sticky aluminium, scratch, scuffing.

While cutting, monolateral trimming width is at 10-30mm, and guarantees, without burr, turriform, flounce, the little broken sea of limit portion etc., to cut staggered floor and must be less than 0.5mm.Rouleau end face after cutting must be clean, clean and tidy; Rice number is as the criterion with meter counter, length tolerance+30/-0 rice.Divide the rouleau cutting to number in order, and lot number and specification are write with chalk at the end face of aluminium volume; The examination paper point cutting must be firm with three high temperature foil tape seals, prevents from annealing loose.On rouleau after cutting, annealing material rest is waited to anneal.

9, finished products

For guaranteeing that material volume surface is without band oil, without macula lutea, surface swabbing A level, finished products adopts ladder differential temperature annealing way, low temperature purge section 200-220 DEG C, soaking time 2-4 hour, middle temperature oil removing section 240-260 DEG C, soaking time 8-10h, high temperature is except macula lutea and stable mechanical property section 380-400 DEG C, soaking time 8-10h, after finishing, open other cooling system and carry out coolingly, band furnace gas temperature is down to 200 DEG C and is opened below fire door and come out of the stove.

10, Performance Detection

Detecting mechanical property result is: tensile strength 70-90MPa, and unit elongation is more than or equal to 23%, and hardness is less than 23HV.

Claims (1)

1. a manufacture method for aluminium foil for 1060 alloy cables, is characterized in that: comprises the following steps successively,

A. melting, adopts 1060 alloy materials to carry out melting;

B. casting, casting finished product thickness is controlled at 6.8-7.0mm;

C. cold rolling cogging, when blank temperature is less than 40 DEG C, upper milling train is produced, and is rolled down to 3.0-4.0mm thickness;

D. process annealing, is set in 500-550 DEG C by furnace gas temperature, keeps 20-24 hour after furnace gas temperature reaches design temperature, and insulation is opened other cooling system after finishing and lowered the temperature, and treats that furnace gas temperature is down to 200 DEG C and comes out of the stove below, naturally cooling after coming out of the stove;

E. roughing, material after process annealing volume temperature is down to 40 DEG C and is carried out roughing after following, and roughing to 0.5mm thickness carries out slitting trimming;

F. finish rolling, 2-3 passage of process is rolled down to the finished product of 0.18-0.2mm thickness;

G. finished products, adopts ladder differential temperature annealing way, low temperature purge section 200-220 DEG C, and soaking time 2-4 hour, middle temperature oil removing section 240-260 DEG C, soaking time 8-10h, high temperature is except macula lutea and stable mechanical property section 380-400 DEG C, soaking time 8-10h.