MCD Engineering Group
Porosity has long been one of the most persistent quality challenges in aluminum castings. While macro-porosity can often be identified and removed, micro-porosity—tiny voids dispersed within the casting—poses a more insidious threat, reducing mechanical strength, fatigue resistance, and leak tightness. Among the many factors influencing porosity, the addition of Strontium (Sr), a widely used eutectic … Read more
Introduction Casting is one of the oldest and most versatile manufacturing processes, but it comes with a challenge every foundry engineer knows well: defects. From surface blemishes to hidden internal flaws, defects reduce yield, increase scrap, and can compromise safety if undetected. What often gets overlooked is this: it’s not enough to just notice a defect … Read more
The way molten metal is introduced into a mold directly influences casting soundness, defect rates, and yield. Among the available methods, bottom pouring has proven to be highly effective for minimizing turbulence, improving filling patterns, and enhancing casting quality. The velocity of molten metal at the ingates, which dictates whether the flow is laminar, transitional, or turbulent — and … Read more