The reason why there are black spots in wire mesh welding is that the action of wire feeding should be timely filled in the melting time, and the development should be appropriate. There is no argon gas, long burning, large current, long distance, blunt tungsten needle and high molten pool temperature are the fundamental reasons for blackening. Continuous burning, is about active welding machine energy selection, machine welding will appear black spots.

The application of barbed rope is calculated in accordance with the length, but the purchase of barbed rope is calculated in accordance with the weight of the barbed rope, which causes the user is difficult to count the number of procurement confusion, so we need to understand clearly, a kilogram of barbed rope to less meters? How much does a meter of barbed rope weigh? These two problems, the procurement of thorn rope becomes very simple.

The chromium-plated layer has good thermal property. When the temperature is heated below 500℃, its luster and hardness are not changed obviously. When the temperature is higher than 500℃, the initial oxidation and discoloration occur, and the hardness decreases when the temperature is higher than 700℃. The friction coefficient of chrome coating is small, especially the dry friction coefficient, which is low among all metals. So the chrome coating has good wear.