Accelerated Test of Die Casting at High Temperature and High Humidity

Accelerated Test of Die Casting at High Temperature and High Humidity

Die casting is a precision casting method, the principle is to melt the better metal [zinc, tin, lead, copper, magnesium, aluminum]... Six kinds of alloy melting, with rapid high pressure mechanical properties into the metal mold, the use of steel mold low temperature rapid solidification molding casting method, die casting is a pressure casting parts, can be manufactured into auto parts, locomotive parts, LED lamps and LED street lights, consumer electronics parts, cameras, mobile phones, communications... In order to confirm whether the die-casting parts can be satisfied with the outdoor environment for a long time and whether there will be related defects, relevant tests need to be carried out through the HAST highly accelerated life testing machine.

Common defects in die casting: cold insulation, cracks, holes

List of common specifications for die casting:

ASTM B85: Standard for pressed Film Casting of aluminum alloys

ASTM B86: Zinc and zinc aluminum alloys

ASTM B176: Copper Alloy die castings

ASTM B894: Zinc-Copper-Aluminum Alloy die casting

ASTM E155: Standard Reference Radiographs for the inspection of Aluminum & Magnesium castings

ASTM B94: Magnesium Alloy mold standard

GB5680: high manganese steel casting

GB9438: Aluminum alloy casting

GB15114: Aluminum alloy die casting

QC273: Technical specifications for automotive zinc alloy aluminum alloy copper alloy die casting parts

YL-J021201: die casting of aluminum alloy cover plate for machine cooler

Die casting test items: metallographic test, mechanical ability, bending test, hardness test, impact test, tensile test, high temperature and high humidity, chemical composition, non-damage inspection (X-ray, fluorescence), residual element analysis, surface defects, dimensional tolerance, microstructure, weight tolerance, air tightness test

Die casting Performance test - high temperature and high humidity accelerated test:

PCT condition: 120℃/100%R.H.

HAST condition: 130℃/85%R.H.

Common missing after high temperature and high humidity accelerated test of die casting:

Die casting in the manufacturing process, if the cleaning is not true, resulting in residual release agent, cutting fluid, saponification fluid on the surface... Such corrosive substances, or other pollutants, under certain temperature and humidity conditions, it is easy to accelerate oxidation or mold, die-casting test product surface with a layer of white powder or yellow, black are oxidation phenomenon.