Aluminum alloy die casting pouring temperature
The pouring temperature refers to the temperature at which the molten metal is poured into the pressure chamber. In production, the pouring temperature is controlled by controlling the temperature of the alloy liquid in the holding furnace.
For castings of different shapes and structures, the pouring temperature can be controlled at 630~730℃; for thin-walled complex parts, a higher temperature can be used to improve the fluidity of the molten metal and obtain good molding; for thick-walled structural parts, it can be Use lower temperatures to reduce solidification shrinkage.
If the pouring temperature is too high, the air intake in the aluminum water will increase, which will easily cause pinholes, shrinkage cavities and surface blistering in the thick wall of the casting; at the same time, the corrosion of the mold will be accelerated, resulting in premature aging and cracking of the mold.
If the pouring temperature is too low, the fluidity is poor, and defects such as cold separation, flow lines, and insufficient pouring are easy to occur; if the temperature is too low, the molten aluminum is easy to produce composition deviation, which causes hard spots in the casting and makes post-processing difficult.