overview of the technology development of super heat resistant aluminum alloy wire-非凡电子娱乐

in recent years, along with the increase of the electric power demand, the necessity of the cable transmission capacity is more and more big,

therefore, it is necessary to have an aluminum alloy wire with high temperature and high conductivity.

in the past, as heat resistant aluminum alloy wire, 60tal (60% conductivity aluminum alloy)

and utal (super heat resistant aluminum alloy) has been practical, but the 60tal's short-term allowable temperature is low to 180 degrees c,

however, the short-time tolerance temperature of utal is 230, it has sufficient heat resistance, but the conductivity is only about 58%.

the heat aluminum alloy, generally an al zr alloy, in this alloy system, adding more zr,

the heat resistance of zr is improved, and the conductivity decreases at the same time.

therefore, the amount of zr is generally not more than 0.1 weight percent, there is a limit to the improvement of heat resistance.

japan mitsubishi cable co., ltd., the new invention of the conductivity of more than 60%,

heat resistant aluminum alloy cable with excellent heat resistance for a short time temperature above 280 deg c.

it is in the case of a large number of zr containing 0.25 to 0.45 weight percent,

after the heat treatment of 350 to deg c for 20 ~ 100h, the cutting area is reduced by more than 65%,

and then heat treatment at 150 ~ 300 deg c under the temperature of 1 ~ 20h.

that is, by the specific alloy system (see article) continuous casting,

the zr is supersaturated to be melted in the al master batch, and then passed through the specific heat treatment,

the precipitated particles of zr precipitate in al masterbatch, due to the fine precipitates,

the processing structure is stabilized, and the heat resistance can be improved without reducing the conductivity.

in addition, by adding ti, the crystal grain of the rod obtained by continuous casting is refined,

it also has the effect of inhibiting the occurrence of casting defects in the high zr alloy as a general disadvantage,

in this way, the finished product yield can be greatly improved.

therefore, because of the present invention, the conductive aluminum alloy wire is obtained without loss of conductivity,

as a large transmission capacity of overhead transmission lines in the power companies have been widely used and won praise.

the alloy system is composed of the following five components:

1:zr (zirconium): 0.25 to 0.45 weight percent

2:si (silicon): 0.03 to 0.3 weight percent

3:fe (iron): 0.1 to 0.3 weight percent

4:ti (titanium): 0.01 to 0.05 weight percent

5:al (aluminum) and the usual impurities into the alloy: the remaining percentage