Study of factors affecting the quality of permanent Mold coatings using the Cross Cut Test method

Permanent mold coatings in casting regulate heat transfer, prevent metal adhesion, and extend mold life, with failure mainly due to adhesion loss and wear. This study examines the effects of mold cleanliness, temperature, and coating thickness (DAG 395 and DAG 633) on adhesion using the Cross Cut Test (ASTM D3359 Method-B). Results show that 80 µm coatings remain stable at 60-270°C with less than 5% detachment. However, at 100 µm or more, detachment increases, especially for DAG 395: 3B (5-15%) at 100 µm, 2B (15-35%) at 140-180 µm, and 1B (35-65%) at 220 µm. Controlling coating thickness is crucial for adhesion and mold durability in casting.

Keywords : Metal casting, Aluminum casting, Mold coating, Permanent mold and Adhesion