The previous article introduced some defects in the process of magnesium alloy wire casting, and this article continues to introduce them to you:

D: Water marks: marks between two separate solidified areas on the same surface during the solidification process of magnesium alloy. The formation of water lines is because before the metal melt is fully filled with the mold cavity, after the metal melt is hardened due to contact with the mold wall, the metal melt flow contacts the solidified part from the other side of the true mold filling cavity, and the metal liquid flowing in after does not have enough energy to melt the solidified metal and solidify around it. In this way, a water stripe is formed between the two. The surface with more water marks can cause electroplating bubbles.

E: Slag inclusion: refers to the non-magnesium alloy particles into the magnesium alloy products. The most common inclusion in magnesium alloy die casting is the intermetallic compound or metal oxide formed by the combination of iron and aluminum. The intermetallic compound of iron and aluminum is hard and brittle, so it will cause problems in processing and polishing, causing scratches on the surface of the product or falling off to form magnesium compound holes. If the metal oxide is on the surface of the product, due to its poor electrical conductivity, the binding force between the coating and the part of the product is not strong. It may cause electroplating foaming. The above sundries will float on the surface of alloy liquid, should be appropriate to reduce the insulation temperature.

F: adhesive die; This situation of magnesium alloy wire is caused by the adhesion of die-cast magnesium alloy on the surface of the die cavity. When the adhesion occurs, the magnesium alloy wire may be broken or deformed at the same time, and the thimble punch mark or the internal pinhole of the product may be caused by the dimensional error. Generally due to the mold temperature is too high or too low, the mold design is unreasonable, the top output is not balanced.