BZⅡ35

Copper and magnesium alloy stranded wire is mainly used for the suspension and positioning of the contact line of the contact line of the electrified railway. According to their different role in the catenary suspension and have different names, such as the load-bearing cables, auxiliary load-bearing cables, transverse load-bearing cables, upper positioning rope, lower positioning rope, central anchor rope, elastic sling, sling, etc..

1, model: fatigue copper alloy stranded wire.

In accordance with section 2, specifications: all kinds of material points have different specifications, there are 10 ㎜ 2 to 150 ㎜ 2 nine; According to the structure there are 7 to 37 strands of concentric stranded structure, there are also 7 x 7, (3+9) x 7 of the complex stranded structure.

3. Main technical indicators:

3.1 main chemical components

Single wire for copper strand is made of medium hard round copper wire GB/ t3953-2009;

The main chemical composition of copper alloy used in copper alloy stranded wire is as follows:

3.2 specification, structure, size and performance

Note 1: single-line diameter deviation for JT type is + 1% single-line diameter, JTM10, JTMH10, JTM16, JTMH16 type is + 0.03mm, jtm25-jtm150, jymh25-jtmh150 type is + 0.05mm;

Note 2 standard distance of tensile test specimens: single wire is 250mm, twisted wire is not less than 5m. During the test, the moving speed of the fixture was 20-30mm/min.

3.3 the resistivity

The resistance of the copper and copper alloy single 20 ℃ rate:

Copper: not more than 0.017 77 Ω was/m,

Copper and magnesium (Mg) 0.2% : no more than 0.022 40 Ω was/m,

Copper and magnesium (Mg) 0.5% : no more than 0.027 78 Ω was/m.

Other TB/ t3111-2005 standards:

Section 3.4 diameter ratio