JPS60149752A - Manufacture of high-strength aluminum alloy conductor - Google Patents

Abstract

PURPOSE:To obtain the titled conductor comparable to a copper wire in strength by normal and stable drawing by using a drawing die which is forced to be lubricated when a rough wire of an Al-Mg-Si-Fe-Cu alloy subjected to soln. heat treatment and aging is drawn. CONSTITUTION:Rolling oil on the surface of a rough wire of an Al-Mg-Si-Fe-Cu alloy loss properties as lubricating oil by thermal degeneration while the wire is passed through soln. heat treatment and aging stages. When the rough wire passed through the stages is drawn with a conventional drawing die, drawing oil does not stick to the surface of the wire to cause surface seizing and deterioration in the surface quality. In order to eliminate the trouble, a drawing die which is forced to be lubricated is used in at least one initial drawing pass, and a conventional drawing die is used in the remaining pass schedule.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a high-strength aluminum alloy conductor by continuous wire drawing or single pot wire drawing, and particularly provides a method for manufacturing a high strength aluminum alloy conductor while stably maintaining a normal wire drawing state. It's something you can do.

Conventionally, when strength is required for overhead power transmission lines, steel core high strength aluminum alloy stranded wires and all high strength aluminum base metal stranded wires have been used. , No. A aluminum alloy (AJ
! -M (+-8i series) and 5005 series alloy (A, e-M
A conductor made of il series) is used. However, it is known that these conductors have lower strength than copper wire and cannot be used as a substitute for copper wire.

In view of this, the inventors of the present invention made various savings, and as a result, the strength was 40 kg/mm 2 or more, which is equivalent to copper wire, and the conductivity was
C has developed a method for producing a high-strength aluminum alloy conductor that is equivalent to conventional conductors in terms of other properties such as elongation.

That is, the present invention deals with A(
Two M! ] -8i - When drawing a rough wire made of F13-CIJ alloy, at least the initial wire drawing bath 1
This is a method for manufacturing high-strength aluminum alloy conductors by drawing the wire with a forcedly lubricated wire drawing die.

The present invention will be explained in detail below.

The rough drawn wire C to be wire drawn in the present invention is AJ!
-MQ -8i - Made of Fe-Cu alloy,
This is then subjected to solution treatment and rough aging. The ΔA-Mg-8i-Fe-Cu alloy has the composition shown in JP-A-56-62944, that is, M (10.3~1.Ow1%, Si0.3~O,gw
t%, FeO, 15-0.80wt%, CuO10
05 to 0.2 wt%, the balance A (and its impurities) is the basic composition, and further Ni, 3e, 3b, Z
r, Cr, Mn, Y, Mo, Ca, Go, Pb.

The addition of small amounts of other elements - Sn, Bi, Ge''J - is also permissible.

The solution treatment is a process for sufficiently solid-dissolving Mg and Si components, and may be performed either during continuous casting and rolling or without rough drawing. Rough aging is a second step in which solid-dissolved Mg and Si components are finely precipitated to increase strength.

Af -M(1-3i -Fe-
When drawing rough wire made of Cu-based alloy,
In both processes, the rolling oil on the rough drawing surface is altered by heat and loses its properties as a lubricant, so if wire is drawn using a normal wire drawing die, the drawing oil will not adhere to the rough drawing surface. As a result, burn-in occurs and the wire breaks, resulting in a loud noise. There is also a method of applying wire drawing oil to the entire surface of the rough wire before wire drawing, but this increases the cost and also causes insufficient adhesion of the wire drawing oil to the surface of the rough wire. Burn-in occurs inside the surface and the surface quality at the C1 cable becomes poor.

In the present invention, during this wire drawing process, forced lubrication wire drawing is used for at least one initial wire drawing pass, and wire drawing is performed using a normal die for the remaining pass schedule.C1 Forced lubrication wire drawing By using a die, the wire drawing oil is forcibly applied to the wire surface for drawing, so even if a normal die is used for the rest of the bus schedule, the problem of seizure as described above will not occur. It is possible to obtain normal strands with good surface quality without any damage.

As a result, the tensile strength of heat treatment was 40 to 9i.
It was possible to obtain a high-strength aluminum alloy conductor with a diameter of at least mm2 and other properties equivalent to those of the No. I aluminum alloy conductor.

The present invention will be explained below with reference to Examples.

△J! -tvNl -8i - “e-Cu species/?
) After solution annealing the rough drawing wire made of the alloy composition, it is subjected to rough drawing aging.

When drawing this roughly drawn wire +oom to obtain a 4.0 mmφ wire, an initial wire drawing pass was performed using a forced lubrication wire drawing die (wire drawing), and the remaining wire drawing was performed using a normal wire drawing die.

This was followed by -C heat treatment to obtain a C high-strength aluminum alloy conductor.

In addition, as a comparative method, the same rough drawn wires were coated with wire drawing oil before wire drawing, and those that were not coated were subjected to -C Tsutomi Tice C wire drawing, followed by heat treatment and made into conductors.

The alloy composition and performance of these conductors are shown in Table 1.

The electrical conductivity of the performance was determined by measuring electrical resistance using a Kelvin double bridge, and the tensile strength and elongation were measured using an Amsler type tensile tester.

Regarding surface quality, bendability, which has a large effect on material properties, was measured by repeatedly bending the wire at an R twice the diameter of the wire and measuring the number of breaks.

familiar )ζ ※※※※mi※ 皓の() Old translation nee + , c”q +, -2℃-2 〇〇, -1
-1-1 -00000C:Ioo 0ΩΩ e) 0
00002 "Prison 0 size ■ To's ■ 8 ″OX≧♀==Umakaki 5th day song 〈 Tan- indulgence ※ ※・〆 ・Tari seven taya tag (S e:, CQ,
7 +-, cf), 7 position 7 eQ, 7-711'
, i, -+Q0 CIO000000C) 0 '' fruit flea degree hζ巴訃Mimi flea curse bias 0 − CI+ () t−□.

KUO KONI MI 01 ``MI DO k gloss (MI MI MI MI 1 q MI 0) Z shi connection = RO ni karikaku katsu bien straw karsa From the results of Table 1, it is clear that 1) As shown in 1. Invention method no.
The conductors obtained from 1 to 9 have a conductivity of 53.4 to 54.9.
%lAC3, elongation, 7-6.8%, flexibility 18-26
times, the tensile strength is 42.1-45.1! / mm 2 and compared with conventional materials No. 28, No. 29, -C conductivity, elongation, and flexibility are the same, and C' and C' are significantly improved in tensile strength. On the other hand, comparative method No. 1
0 to 18 (with 1fi of wire drawing oil applied to the rough drawn wire), burnt damage occurs during wire drawing, and although the conductivity and tensile strength are good, the elongation and flexibility are inferior to those obtained by the method of the present invention. It is also inferior in comparison. In addition, comparative method Nos. 19 to 27 (with wire drawing oil applied to the rough drawing wire (no fi) 0 caused wire breakage one after another, making wire drawing impossible.

As described above, according to the present invention, a high-cube/luminium alloy conductor that has almost the same conductivity, elongation, and flexibility as a conventional aluminum alloy conductor, and is far superior in strength, can be stretched normally and stably. It can be manufactured by wire processing and has a remarkable industrial effect.

Claims (1)

[Claims] (1) Af-M (1
-3i -Fe-CLI Alloy Yolinal'Ei A method for producing a high-strength aluminum alloy conductor, characterized in that when wire is drawn, at least one initial wire drawing bath is carried out using a forced lubrication wire drawing die.