{"id":30336,"date":"2024-11-06T15:23:33","date_gmt":"2024-11-06T07:23:33","guid":{"rendered":"https:\/\/www.ray-tron.com\/?p=30336"},"modified":"2024-11-06T15:23:33","modified_gmt":"2024-11-06T07:23:33","slug":"clc0035","status":"publish","type":"post","link":"https:\/\/www.ray-tron.com\/en\/clc0035\/","title":{"rendered":"What are the factors affecting the yield strength of copper tape for wiring harnesses?"},"content":{"rendered":"

The yield degree of copper tape for wiring harnesses refers to the stress at which the material undergoes plastic deformation (no longer returns to its original state) when the copper tape is subjected to external force. The yield degree is critical to the performance of the copper tape because it affects the elasticity and tensile strength of the copper tape during use. The factors that affect the yield degree of copper tape for wiring harnesses mainly include the following aspects:<\/p>\n

1. Material composition<\/strong><\/p>\n

Copper purity: The yield strength of copper strip is closely related to the purity of copper. High-purity copper usually has lower yield strength, but better ductility and corrosion resistance. Low-purity copper (such as impurities) will increase the yield strength, but may cause non-uniformity and brittleness of properties.<\/p>\n

Alloying elements: If the copper strip is a copper alloy (such as brass, aluminum bronze, etc.), the added alloying elements will significantly affect the yield strength. For example, the addition of zinc, aluminum and other elements can increase the yield strength of the copper strip, but will reduce its ductility. The type and proportion of the alloy directly determines the yield strength of the copper strip.<\/p>\n

2. Processing technology<\/strong><\/p>\n

Cold rolling vs. hot rolling: The cold rolling process usually results in an increase in the yield strength of the copper strip, as the grain structure of the copper strip deforms and recrystallizes during the cold rolling process, resulting in a higher yield strength. Hot rolling usually results in a lower yield strength, but due to the higher temperature during the hot rolling process, the copper strip has better ductility.<\/p>\n

Rolling reduction rate: During the rolling process, the greater the thinning rate, the higher the yield strength of the copper strip will usually be, because the grain refinement and work hardening effect enhance the strength of the copper strip.<\/p>\n

Annealing treatment: Annealing can reduce the internal stress of the copper strip and increase ductility, but excessive annealing will reduce the yield strength. Therefore, the control of annealing temperature and time needs to be optimized according to the specifications and application requirements of the copper strip.<\/p>\n

3. Grain structure<\/strong><\/p>\n

Grain size: The yield strength of copper strip is closely related to its grain size. The finer the grain, the higher the yield strength of the material (according to the Hall-Page relationship), because the grain boundaries hinder the slip of dislocations and increase the strength of the material. Grain refinement during processing (such as cold rolling or rapid annealing) can increase the yield strength.<\/p>\n

Grain orientation: The grain orientation of the copper strip also affects its yield strength. Non-random grain arrangement can lead to differences in yield strength in different directions. Therefore, by controlling the rolling direction and annealing treatment, the grain orientation of the copper strip is adjusted to optimize its yield strength.<\/p>\n

\"\"