Magnesium alloy die castings gravity casting low pressure casting

Production of ordinary magnesium alloy (flammable magnesium alloy) castings and forgings

The first option is a hot chamber horizontal magnesium alloy die casting die forging machine. Its advantage is that there is no complicated protection system to prevent the burning of magnesium alloys.

 1. Production of ordinary magnesium alloy (flammable magnesium alloy) castings and forgings

The first option is a hot chamber horizontal magnesium alloy die casting die forging machine. Its advantage is that there is no complicated protection system to prevent the burning of magnesium alloys.

It is recommended to use a double furnace parallel insulation and smelting system. One furnace is a holding furnace. The seal is not opened during production, and the protective gas seal is added. The other furnace is used for special melting of magnesium ingots. The melting furnace is recommended to use a ready-made magnesium alloy power frequency furnace (a large industrial electric furnace factory in Shandong can be matched). This solution, the investment is the smallest.

The hot chamber horizontal magnesium alloy die-casting die forging machine has high production efficiency and is the best choice for the production of small-sized magnesium alloy blanks. When a large-scale hot-chamber horizontal magnesium alloy die-casting die forging machine is required, current equipment manufacturers will require a longer ordering time.

The second option is a cold room horizontal magnesium alloy die casting die forging machine. Its advantage is that it can produce extra large magnesium alloy castings and forgings (such as magnesium alloy wheels, etc.), and the largest models currently available are 900 to 1200 tons of die forging equipment.

The melting furnace is also recommended to use a ready-made magnesium alloy power frequency furnace. Quantitatively use the currently mature equipment for the soup device.

The only drawback of this solution is that the current magnesium alloy dosing device costs are still higher.

2. Production of flame retardant magnesium alloy castings and forgings

At present, the flame retardant magnesium alloy is functionally the same as ordinary magnesium alloy. If the customer does not require magnesium alloy varieties, it is recommended that we use flame retardant magnesium alloy to produce castings and forgings, and recommend it as a new magnesium alloy casting and forging project. The most preferred process.

In terms of materials, China has achieved the development of flame retardant magnesium alloys at the international advanced level, and won the second prize of National Science and Technology Progress Award in 2003. The ignition temperature of this magnesium alloy is increased from 520 ° C below the melting point (the burning point of AZ91D magnesium alloy is 510 ° C) to higher than the melting temperature (760 ° C), achieving the unprotected smelting and casting forging of magnesium alloy in the atmosphere.

In terms of equipment, all the current common extrusion die-casting forging machines can be used for supporting production. That is to say, the equipment for producing magnesium alloy castings and forgings is exactly the same as the aluminum alloy extrusion die-casting forging machine, and the equipment investment is reduced by 20%. The entire production cost can be minimized.

3. Semi-solid production of flame retardant magnesium alloy castings and forgings

Another process advantage of extrusion die-casting forging can be fully utilized in the production of flame-retardant magnesium alloy castings and forgings, which is a semi-solid extrusion die-casting forging process capable of using magnesium alloys.

Magnesium alloy has a melting point of 650 ° C and a semi-solid temperature range, so it is an ideal semi-solid injection molding metal. The semi-solid extrusion die-casting forging process of magnesium alloy can reduce the initial casting temperature of magnesium alloy from 760 °C to 560-630 °C.

After a simple flame retardant alloying of many ordinary magnesium alloys, the ignition point can be higher than the temperature of 560-630 °C, which makes the magnesium alloy unprotected smelting and casting and forging production in the atmosphere is universal, no longer limited to the present A few brands developed.