Die casting magnesium alloy problems

Die casting magnesium alloy problems

1. The extraction and production of raw materials seriously pollute the environment, and the use of magnesium alloy is limited by environmental protection;

2, magnesium alloy with covering agent flame retardant, easy to produce harmful body "dust", workers respiratory protection, need to invest;

3, magnesium alloy with covering agent flame retardant, easy to produce HCL gas, combined with water vapor, produce highly corrosive dilute hydrochloric acid, to the factory personnel, equipment and plant infrastructure damage, workshop roof support and other need to prevent corrosion;

4, magnesium alloy with SF6 mixed gas flame retardant, SF6 gas because of manufacturing mixed with toxic impurities, such as HF, so the need for strict management; SF6 is a greenhouse gas, its use in China will be limited;

5, magnesium alloy is easy to burn, melting, heat preservation, transportation to prevent combustion, technical threshold;

6, magnesium alloy is easy to burn, melting furnace, holding furnace alloy residue cleaning workload is large;

7. Magnesium alloy is easy to burn. If the equipment is old, the leakage outside the machine is frequent, the alloy insulation furnace is not sealed, the hydraulic oil should be used without fuel to prevent fire, and the flammable and explosive gases and liquids on the production site should not be stored;

8. Magnesium alloy is easy to burn, and the machine and melting furnace need to put (a large cylinder) yellow sand placed flammable magnesium slag, (a large barrel) flame retardant covering agent, as the fire produced by sporadic escape material in the process of extinguishing die casting;

9, magnesium alloy dust will spontaneous combustion, high temperature magnesium slag will also burn, need to focus on special treatment;

10. As the structural material, magnesium alloy is easy to be affected with moisture and oxidation, so surface treatment is needed. Chromium plating and anodic oxidation pollute the environment.

11. Low thermal strength of magnesium alloy castings is easy to produce hot cracks, resulting in air leakage and fracture of the castings;

12, magnesium alloy specific heat capacity is low, heat loss is fast, need mold generally need to design heating device;

The magnesium alloy will burn when it meets oil and explode when it meets water; Large magnesium alloys burn out of control, and the fire is difficult to control.