Key Technologies for Enhancing Ultimate Tensile Strength of Aluminum Conductor Aluminum-Clad Steel Reinforced

Aluminum-clad steel reinforced possesses excellent mechanical properties, electrical properties and anti-corrosion performance, which is widely used in coastal and heavily polluted areas, and has obvious energy-saving benefits. However, due to low elongation at break of aluminum-clad steel wire (only about 1.2%), tensile force between aluminum wire and aluminum-clad steel core cannot be released simultaneously during compression process, resulting in a low pass rate of grip strength test. Based on material characteristics, aging heat treatment process was adopted, and elongation at break of aluminum-clad steel wire could be increased to above 2.0%, thereby enhancing deformation synergy between aluminum wire and aluminum-clad steel core. At the same time, influence of geometric dimensions of strain fitting on grip strength was analyzed, and suggestions for fitting selection and optimization of compression processes were given. Practical application showed that the above measures could significantly improve the overall tensile force of aluminum-clad steel reinforced and pass rate of grip strength test.