Rapid Detection of Surface Bubble Defects in Non-Ferrous Alloy Die Castings

摘要

The present invention is a method for quickly detecting the surface bubble defects that occur most frequently in non-ferrous alloy die-casting casting, a neutral salt (Heat) that is harmless to the human body instead of lead (鉛, Pb) harmful to the human body as a thermal medium for the detection of surface defects ( It is about how to use salt.;To this end, the present invention uses a commercially available neutral salt of known composition that is harmless to the human body and less energy required for heating, instead of lead which is harmful to the human body as a heat medium, and adds the salt into the container and adds the salt into the container. Heating the sample to a temperature of 550 ° C., immersing the die casting casting as a test object in a predetermined position in the salt bath when the salt reaches a predetermined temperature and melts the sample after a predetermined time of within 2 minutes. It is characterized in that it comprises the step of taking out, cooling and washing the sample taken out of the salt bath by cooling means, and observing defects on the surface of the cooled and washed sample.