pure iron wire

During this process, each time the wire is pulled over, the surface hardens due to the high friction temperature. So basically every time you pull it you have to annealing it in the furnace. On the one hand, it is to reduce the surface hardness. On the other hand, during the process of wire pulling, only the surface is deformed, and the center is unchanged. So there’s a lot of stress inside. Therefore, it is necessary to rely on annealing to eliminate the internal stress, so that the wire becomes soft again to eliminate the stress before being drawn again.

At present, it is recognized that the best surface treatment method for rust prevention is to make dacron rust. Generally, auto parts have been used this method for rust prevention. The salt water test generally lasts more than 96 hours. But if the hardware is used in very poor conditions, there are also people who use “asphalt” which is tar to do the surface treatment.

When the barbed rope is used, it is calculated according to the length, while when purchasing the barbed rope, it is calculated according to the weight of the barbed rope, which causes the confusion of users’ difficulty in counting the quantity of purchase. Therefore, it is necessary to understand clearly that there are less meters per kilogram of the barbed rope. How much does a barbed rope weigh in a meter? These two problems, the purchase of barbed rope becomes very simple.