About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Melt Processing, Casting and Recycling
|
| Presentation Title |
The Influence of Coating Constitution on the Release Behavior
of Steel Pins for Aluminum Casting Operations
|
| Author(s) |
Mason Page, Robert Walton, Robert Holt, Stephen Midson, Chris Caflin |
| On-Site Speaker (Planned) |
Stephen Midson |
| Abstract Scope |
Excellent release of steel core pins is essential during aluminum casting, to prevent adhesion during pin extraction, and avoid damaging or bending the castings. To prevent adhesion of solidifying aluminum to the steel core pins, ceramic coatings are applied. This study utilized a laboratory test to evaluate the effectiveness of various coatings. A drafted 0.5-inch diameter hardened H13 steel core pin was coated and inserted through the bottom of a steel crucible. About 1 kg of molten aluminum alloy A356 was poured into the crucible. Once the aluminum solidified around the pin and cooled to 400oC, a tensile frame extracted the pin as a load cell measured the extraction load. This study examined two boron nitride coatings, documenting the effects of composition, thickness, and durability on extraction load. The results will be discussed based on the influence of coating composition, thickness, and durability on magnitude of the extraction load. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Recycling and Secondary Recovery, Surface Modification and Coatings |