JPS6079607A - Core-filled aluminum or aluminum alloy twisted wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cored aluminum or aluminum base metal stranded wire, and particularly to a stranded wire having the same cross-sectional area as a conventional stranded wire but with superior strength.

Conventionally, copper-core aluminum stranded wires have been mainly used for overhead power transmission lines, and where heat resistance is particularly required, cored heat-resistant aluminum alloy stranded wires have been used, and where strength is required, steel-based wires have been used. High strength aluminum alloy strands are used. These stranded wires are all core wires made by twisting steel wires together.
Second, since the Δ (or Δ) alloy wires are twisted together, the purpose of using steel wire for the core wire is to supplement the strength of the AJ2 or △ (alloy wire as the strength is low, so it can be used as a power transmission line. .

Normally, the strength of such a cored stranded wire is not the simple sum of the strength of the core wire and the strength of the A (or A) alloy wire, so for convenience, the standard is 0.9 times the sum of both. However, depending on the type of alloy strands and core wires and the configuration of the stranded wires (1 noise, number ratio of strands, and total number), the strength as a power transmission line may be 0. It can be lower than 9 times.

Especially using high-strength A and e alloy wires! , 8 strength, this tendency becomes more noticeable when the transmission line is 300cm thick, and it is difficult to manufacture a high-strength transmission line with a single height.

In general, the strength m of cored A (or A flexible alloy stranded wire) such as copper core aluminum stranded wire, cored heat-resistant aluminum alloy stranded wire, and copper core high horn aluminum alloy stranded wire is the strength of the core wire strand A, e or A (installed as 0.9 times the sum of the alloy wire and the strong melon. Therefore, for strength, it is installed from a simple metal filling.
In some cases, it may be necessary to increase the cross-sectional area of the transmission line. However, the increased weight of transmission lines
It has become necessary to increase the strength of the steel towers that support this, resulting in significant economic losses not only in the power transmission lines but also in the towers and other overhead line equipment.

In view of this, the present invention was developed as a result of various investigations into core wire strands and A(
It was discovered that the strength of the power transmission line would decrease if the stress component 1[l of the Yabu alloy strand was not appropriate, and as a result of further study, a core with superior strength with the same to [1Jiii product] was found. This is a developed aluminum or aluminum alloy stranded wire that can be used on different types of core wires made by twisting core wire strands.
l or Δ (in a stranded wire made of alloy wires, the elongation characteristics EX of the core wire and A (or the elongation characteristics E of the alloy wire A)
Core wire strands and A in which the ratio of A and e is E×/E/l is 2 or less
(or A) is characterized by using an alloy wire.

That is, the present inventors created A (or Δ
Regarding the strength reduction of stranded wires made by twisting alloy thread wires, the results of the inspection revealed that galvanized steel wires and zinc-plated steel wires used in conventional power transmission lines
;) While the elongation of plated special steel wire is about 5 to 6%, the elongation of △(or 8) is about 1.5 to 2.0%, and the elongation of t!! steel Wire elongation characteristics EX and △ or A
(The ratio of the elongation characteristic of the alloy wire to the EA value Fx /EAA is 2
．． 5-3 What's going on?

When stress is applied to such a stranded wire, a large difference occurs in the stress elongation properties of the steel wire (a) and the A-flexible or Δ(alloy wire (11)), as shown in FIG. Matatabanyo A1 alloy wire (
When b) reaches the breaking stress, the steel wire (a) still has the highest strength, i.
(Only the stress corresponding to the elongation of the alloy wire (b) at break is shared. Therefore, Δ(or AJ2 alloy wire breaks first, and the steel wire breaks immediately, causing both It has been found that the strength of a stranded wire made of a composite of wires is ruptured at a stress lower than 0.9 times the sum of the breaking stresses of the lines.

As a result of further study on this, we found that the elongation characteristics of the drawing line were
), the steel wire (a) and A(
Alternatively, the strength of the stranded wire can be improved by optimizing the shared stress of the AJ2 alloy wire (b).

However, in the present invention, the elongation characteristic E of the strand that becomes the core wire is
The ratio of x and A (or A (alloy wire elongation property EΔ)
/EAJI is limited to 2 or less, and IC is Ex /EAf
This is because if the value exceeds 2, the strength of the stranded wire will decrease slowly. Although we have explained an example using a core wire made of steel wire,
The present invention is not limited to this, and similar results can be obtained by using different types of core wires made by twisting strands of carbon fiber, glass fiber, reinforced plastic, and the like. Also Ex/
Although it is desirable to bring the value of Ex/EA close to 1, it is extremely difficult due to the differences in materials, and in practice Ex/EA, e should be kept in the range of 2 to 0.5 depending on intermediate annealing and wire drawing processing conditions. Just adjust it.

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

A (alloy) with the composition shown in Table 1 was melted and made into a rough drawn wire by continuous casting and rolling, which was subjected to wire drawing to produce CA (alloy wire. Regarding the various IMfi wires for core wires shown in (-), the tensile strength and elongation were measured by a tensile test, and the ratio Fx /EA, e of the elongation property Ex of the steel wire and the elongation property LAJ2 of the AJ2 alloy wire was found to be various values. A stranded wire having the structure shown in Table 3 was manufactured by combining the wires in such a manner that the wires were combined as shown in Table 3.

A tensile test was conducted on these stranded wires, and the breaking load (+<9) of the stranded wire was determined, and the ratio of the breaking load (+<9) to the sum of the strengths of the soft alloy wire and the steel wire was determined. These results are shown in Table 4.

Table 1 A (Alloy wire Alloy composition (wt%) Symbol Name Fe Si Zr M(l Cu AJ!A ECA
L O,120,06--One remainder B 60TAL 0.1
+ 0.05 0.0+15 - - nCUTAL
O,120,0G 0.12 - - IIDK8L
To O,250,07-0,10,I IIE KTA
L 0045 0.07 0.08 - 0.01 n
F X'T-AL O,150,070,46--! Table 2 Steel Wire Symbol Element Wire Name U Zinc coated steel wire V Special strength galvanized steel wire W Aluminized steel wire X Aluminum coated steel wire Y Zinc coated invar wire 7 Aluminum coated impur wire <Q:l QOLLILLILLJ QOLou
J (co.

2 "~'s size p ■ g ■ 3; ♀♀ 2 = Lop country OuJ 田田○Q 工 z S2-2? Pc!! 5 7; Figure 4 N 2 1.80 22000 97.3〃3 1,5
5 32050 98,2II 4 1,36 243
70 97,8n 5 1,22 63100 08.
2N 6 1.14 123800 97.0〃7 0
．． 87 97420 98,5〃8 1.75 421
20 97.8〃9 180 20B30 97. i n 10 0.93 324GO' 9B, 5n 11
1.82 78100 97,7n 12 1.51
125000 97.7 comparative stranded wire 13 2,17
21480 95. (iJJ 14 2.70 203
00 90. In 15 2.55 308Of) 9
4. On 1(i 2,32 23630 95.On
17 2.26 61600 94.9N 18 2
．． 41 110800 86.0〃19 2.35 8
2000 92. On 20 2.52 41150
95. On 21 2.80. 19900 92.1
n 22 2.67, 31100 93.4 As is clear from Tables 3 and 4, all of the stranded wires No. 1 to 12 of the present invention with Ex/EA (2 or less) have a breaking load of the stranded wire. It can be seen that the ratio to the total n value from the strength of the AJ2 alloy strand and steel cable wire is as high as 96.8% or more.

On the other hand, EX/EAJ2 is 2 or more comparative stranded wire No. 13~
It can be seen that the ratio of the breaking load of the stranded wire to the A1 value (based on the strength of the alloy wire and steel wire) is as low as 95.6% or less for all of No. 22.

In this way, according to the present invention, the ratio of the elongation characteristic Ex of the core wire strand to A (or the elongation characteristic FA of the soft alloy strand A) is
By setting /EAf to 2 or less, the core wire and A
(or △) It has a remarkable effect that it can be made into a high-strength stranded wire with a total strength of 96.8% or more based on the strength of the base metal wire.

[Brief explanation of the drawing]

Fig. 1 is a stress elongation curve diagram of an 8-strand stranded wire with an unsuitable value of the ratio of elongation characteristics Ex and A (or A (elongation characteristics EA of alloy strands), Ex /E/'J2 of the core wire element, Figure 2 is EX/E
It is a stress elongation curve diagram of an 8-stranded wire with a suitable value of Af. a, core wire strand, /l or Δ (alloy strand

Claims (1)

[Claims] In a stranded wire made of stranded dissimilar core wires, Ni, A (or A) alloy wires, the elongation characteristics EX of the core wire strands and the elongation characteristics EA of A or A (alloy strands) The ratio of Ex/E
A cored aluminum or aluminum base metal stranded wire characterized by using a cable wire for a core wire in which Δ( is 2 or less) and an A(or A( alloy wire).