Due to the different processes for producing the copper rods, the oxygen content and appearance of the produced copper rods are different. The copper rod produced by the above process has an oxygen content of less than 10 ppm and is called an oxygen-free copper rod. The copper rod produced by continuous casting and continuous casting is hot rolled under protective conditions, and the oxygen content is in the range of 200-500 ppm, but sometimes Up to 700ppm or more, in general, the copper produced by this method is bright, sometimes called a polished rod.
Oxygen-free copper rods are also made of imported equipment and domestically produced equipment, but the imported products have no obvious advantages. The difference between the copper rod products is not very big. As long as the copper plates are selected well, the production control is relatively stable, and the domestic equipment can also The output can be stretched by 0.05 copper rods. The imported equipment is generally the equipment of Outokumpu in Finland. The best equipment for domestic equipment should be the naval factory in Shanghai. It has the longest production time, military enterprises and reliable quality.
Oxygen-free and low-oxygen rods are easily distinguished from oxygen content. Oxygen-free copper is below 10-20 PPM, but some manufacturers can only achieve 50 PPM or less. Low-oxygen copper rods are in 200- 400 PPM, good rods generally have an oxygen content of about 250 PPM. The anaerobic rods are generally taken by the upper method. The low-oxygen rods are continuous casting and rolling. The two products are relatively low-oxygen rods for enameled wire. More suitable, such as softness, rebound angle, winding performance. But the low oxygen rod is relatively harsh on the drawing conditions, also stretching the 0.2 filament, if the wire condition is not good, the ordinary anaerobic rod can be pulled The good low-oxygen rod is broken, but if it is placed in a good stretch condition, the same rod, the low-oxygen rod may be able to pull to double zero five, while the ordinary oxygen-free rod can only stretch to 0.1 at most. Of course, the finest ones, such as double zeros and twos, have to rely on imported oxygen-free copper rods. At present, some companies try to use the method of peeling to treat the low-oxygen rods to stretch 0.03 lines. But I am not very concerned about this aspect. clear.