Excerpt from the Modern Casting May 2020 article.
This year's American Foundry Society named 2 foundry castings with their top honors as well as 8 others for outstanding achievement. One of those companies achieved outstanding achievement for their unique cold chamber high-pressure die-cast magnesium strut tower brace.
Read MoreTags: Die Casting, Die Casting Release Agents, Die Casting Lubricants, Release Agents for Die Casting, Aluminum Die Casting Process, Die Casting Defects, Die Casting Mold Lubricants, Die Casting Lubricant, Aluminum Die Casting, Die Casting Lubrication and Application, die casting lubricant management, Modern Casting Magazine
Die castings produced with as-cast or nearly as-cast surfaces are becoming more common, where near-surface layers of the castings are machined. As a result, various problems related to the boundary between chill layers and general internal structures are more apparent. Controlling heat insulation during molten metal infusion, heat transfer during pressurization and thermal diffusion to the mold are critical to diecasting quality. Proper control of these variables will lead to dense cast structures free of chill boundaries.
In the paper “Key Issues for Quality Stabilization of Aluminum Die Castings,” Yuichi Furukawa, Toyota Motor Corp., Toyota, Japan, and Yoshiki Tsunekawa, Toyota Technical Institute, Nagoya, Japan, investigated aluminum diecasting processes. The report includes the results of a durability test of various carbon-based coatings, the effects on solidification structure and a coating’s ability to stabilize diecasting quality.
The typical microstructures of a diecast oil control valve (a) without carbon-fullerene coating and (b) with carbon-fullerene coating are shown.
Tags: Die Casting, Squeeze Casting Release Agents, Die Casting Lubricants, Die Casting Lubricant, Die Casting Process, die casting lubricant management, Modern Casting Magazine
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