JPS58217665A - Preparation of creep resistant aluminum alloy conductor - Google Patents

Abstract

PURPOSE:To prepare a creep resistant Al alloy conductor, by a method wherein ulttasonic vibration is added during solidification in continuous casting of an alloy containing Fe or Zr and comprising the remainder Al and, after the treated alloy is subjected to hot rolling, cold wire drawing processing is applied to the hot rolled alloy. CONSTITUTION:For example, a belt wheel type continuous casting machine, wherein an endless steel strip 3 is moved in a state contacted with the partial outer peripheral surface of a rotary casting mold wheel 1 having a recessed groove 2 provided to the peripheral surface thereof to constitute a water cooled casting mold 5 and a molten metal pouring nozzle 6 is provided to one end of the casting mold 5, is used. In this casting machine, the transmission horn 9 of an ultrasonic vibrator 8 is pressed onto the molten metal pouring side steel strip 3 of the casting mold 5 and a molten metal is poured in the casting mold 5 through the nozzle 6. Ultrasonic vibration is applied to a molten alloy containing one kind or more 0.08-1.0wt% Fe and 0.01-0.5wt% Zr and comprising the remainder with Al to solidify the same. Thus obtained continuously cast ingot is hot rolled to form a roughly draw wire to which cold wire drawing processing is in turn applied.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a stirred aluminum alloy conductor with creep characteristics. ! ii! It is related to the manufacturing method.

Traditionally, aluminum or aluminum alloy conductors are used between Llfl! A belt/wheel type J that is a relative of the 11I type with a rotary mold provided with a t and a restraining belt that comes into contact with a part of the outer peripheral surface of the mold. ! Using bowl #4 Ugly, pour aluminum or aluminum gobon molten from one end of the mold,
A solidified lump is continuously pulled out from the other end, and this is s +
d: J kf - It is constructed by extending the rough drawn wire and stretching it between floors. The creep 41# properties of the four aluminum alloys considered in this way are determined by determining the state in which the six alloying elements exist, which depends on the state of existence of the alloying elements, once the magnetic composition is determined. #4 Conditions and subsequent processing or/and silence conditions ≦2. However, in reality, it is impossible to keep the interception conditions extremely stagnant due to the relationship with quality, and generally the creep characteristics have to be revised due to #postpartum processing or/and heat treatment ≦ 2. It is known that when ultra# wave vibrations (high-frequency microscopic ice) are applied to solidified ice, the bound lump product'- is tampered with. I read the reports of the temples. Known methods for applying ultra-f-wave excitation include directly immersing a vibrator in molten metal, or shaping a sea bream into a mold.

The former is impractical because the fMs element is immersed in M-, but the latter is practical because the mold eye body moves in imitation, and the vibrator does not age.

It is known that when high-frequency waves such as ultra-D waves are added to the bath water during solidification, the solidification morphology at ℃ takes on various aspects under the influence. For example, ``One grain reduction of grain boundary precipitation of impurities! The occurrence of rabbit holes is low, and the intragranular bamboo proboscis distribution is lunar. 4 Is this a Sakai family? One hypothesis to explain this is the cavitation theory. this! When the ``i super d technique imitation excitation motion is applied T, 18^ 5 two force waves are generated and pulsating cavitation occurs. During this half-cycle of tension, the volume of the air core is clearly piloted, resulting in the evaporation of liquid into the air core. Evaporation and expansion result in a low temperature inside the air core, and when the surface of the air core is supercooled, it produces two nuclei. After that, when the air core contracts and pressure IIT increases, both
Waves are generated, and the generated crystals flow inside the bathtub, casting a shadow on the crystal nucleation device. In this way, the dη wave is used for the solidified type J- of the melting roar, and has a considerable influence on its performance.
It gives

As a result of adding ultrasonic vibration @ to the solidifying metal and studying its characteristic numbering in the 41 ii bonding process of the present invention, it was found that the #l constant composition alloy had a spike ** It has been discovered that by uniformly selecting four alloying elements while adding @, the creep properties can be significantly improved by taking into account the selection conditions for the alloy elements and the leap properties. It has been developed for aluminum 1 to 2 for 44! In the fabrication of an aluminum joint conductor that is continuously cast and then hot-rolled into a rough drawn wire that is subjected to dark elongation processing, Fe0.08~lj) wt%, Zr.
O, (J l ~ u, any l in mm circle of sw t %
Using an alloy containing Dan or 244j and the balance consisting of A1%
Continuation of the joint j 4 times g = Mit during solidification) ^
It is characterized by the addition of a wave-imitating sea bream.

That is, the present invention has an eleventh feature of the present invention, which is the concave groove (2) in the P4 cabinet.
A part of the outer circumferential surface 52 of the re-mineralization (1) provided with a pressure wheel (4) is brought into contact with the endless belt (3) to form the water SI# type (5), and then Belt/wheel molding 41 with a pouring nozzle (6) at one end of the mold (5)
Using 5i# m, transfer horn of Hozuha Keiko (8) on pouring side steel strip (3) of mold (5) +9) J&:f11
1, pouring nozzle (ti) '2 J and mold (5)
The molten metal f7) poured into the mold is solidified by adding a super head technique j121, and the ingot is poured from the curved end of the mold (5). !
The conductor was then drawn out, subjected to cold rolling to the rough drawn wire, and then passed through a ring.The conductor was then examined for its characteristics. As a result, it was found that the creep of custom-made alloy conductors consisting of PE and/or Zr and the remainder A1 was significantly the same as above.

Creep characteristics involve deformation with recovery,
This is because the dislocations caused by the same bath element 12 are suppressed. Therefore IJ! It is said that the more 11,116 elements there are, the higher the H yield is, and that the solid m-element system has a smaller diffusion coefficient. In general, the state of alloying elements in a Ti lump is such that they are precipitated at grain boundaries or within grains, or they are solid. This is influenced by the degree of solidification, but it is impossible to drastically change the manufacturing conditions for ordinary four-continuum alloys due to product quality, and if the alloy composition is It is through riding that the state of existence is fixed. The reason why the creep characteristics are improved when continuous casting of the aluminum alloy by adding ultrasonic vibration to the aluminum alloy is that the effect of vibration on the head neck causes local supercooling, which causes the stiffness of the alloy elements. It is thought to have been caused by Yuji Temple.

The reason why the effect of the head wave vibration was rejected in the case of aluminum bases containing T and/or Zry is thought to be due to the presence of the influence of carbon in the solid solution. Money. Therefore, the content of Fe and/or Zr is determined as described above. I did so for the following reasons.

Addition of 14″e or/and Z″ to superneck wave vibration,
Although creep waits due to 0 mouths, the Zr content is 0.01 W even if the k″e containing pupil is less than o, oswt%.
Even if it is less than 1%, it is sufficient that the same effect on the leap characteristic as described above cannot be obtained, and if the l+4 content is 1. This is because even if the Zr content exceeds 0.5 wt%, the low F of 44 required as a conductor will be too high, making it impossible to use it practically.

The invention will now be described with reference to embodiments.

! As shown in Fig. 41, a trapezoidal closed mold with a dh surface of 421υQm'' is formed using a steel rotary mold side with a tit diameter of 1.4m and an endless steel strip with an opening in the horizontal direction, and the upper end is opened. A nozzle is provided in the # mold and Ta shown in Table 1 is installed.
The solidified mass was continuously drawn out from the opening at the F end. Bath Ijh in the nozzle
The temperature was set to 690°C, the casting speed was set to 10 ml, and the transmission horn of the super wave oscillator was set at 150 m from the direction of the melt in the mold to the outside of the iI4 band. ! The conditions for starting the jig technique are output 1 and 1. Frequency: 20Kk4g, Copy width: 2
It was set to 0μ.

In this way, four pieces of A were rolled in a row, and the diameter was 9.
．． This was made into a rough drawing line of 5 lengths, which was stretched to a diameter of 4.84 + 1N at t~11 and manufactured into 4 pieces.

Two of these conductors f were used to keep the creep characteristics constant. The results are shown in Table 1.
Regarding the conductor who performed four consecutive prayers without adding ta and recommended the Yanmen Pressure and cold wire drawing sword Roe to the superior Kenma, the creep characteristic '8: was fixed and the polishing was done in the first place. I wrote both 1 and 2.

The creep properties were determined by the average continuous creep when tested for 10,000 hours under the conditions of 150°C and a stress of 5/-.

It is clear from ml and fi that Z j, 5 t: 1? @0.
08-1. Owt% and #V and ZrO, 01~0.5w
The conductor manufactured by the T-q non-explosion method in which two-head wave excitation is added to the metal in the condensation in a continuous series of 14 m containing t% and the remainder AI or 6z has ultra-f wave excitation. It can be seen that the creep characteristics have been renumbered more accurately than in the method without addition. On the other hand, in the case of a composite consisting of l+'eO, 08wt% i4 or/and Zr□, less than 01wt%, and the remainder λl, ultra-poor ice 1iJ is added to the solidifying material in the 4th consecutive #ship.
It can be seen that even if J is added, the creep characteristics are hardly changed.

The above uses a belt-wheel type 4 unified manufacturing machine.

Although we have described an example in which spike tIil vibration is added to the mold, the invention is not limited to this, and any other 44i1!
Needless to say, it can also be applied to the 4-way method, and the transmission horn of the ultrasonic stimulator may be immersed in the side of the 4-way surface in the mold.

As described above, according to the present invention, the deteriorated conductor of creep rN18' can be easily improved, and the present invention has four industrially advantageous effects.
It is something that

4.1 11641 explanations FIG. 81 is an explanatory diagram showing an embodiment of the present invention.

10 rotation type III wheel 2. Concave 4 3. Endless-Obi 4, Gretz νE roll 5. Mold 6. / Suru 8, super great boyfriend 9. Denzen horn diagram 1

Claims (1)

[Claims] J' (Ll, 08-1. 9w1%. ZrO, 01~0, swt% any one or two in the range, using an alloy consisting of Il! 4 A1, continuous production of the alloy 1: Metal during solidification in The manufacturing method of 4 pieces of creep-resistant aluminum joints is characterized by the addition of ultra-a-technique imitation sea bream (with a small vibration reduction of frequency).