Ring rolling is one of the most material-efficient and microstructurally precise processes in metal forming. Starting from a pierced billet preform – the ring blank – the ring rolling mill reduces the wall thickness, increases the diameter, and controls the height of a rotating ring workpiece between driven rolls. The process produces seamless rolled rings … Read more
Forging is not a single process. The term covers a wide family of deformation operations – each with its own tooling, process parameters, starting material requirements, and failure modes. Of this family, two processes dominate industrial forging worldwide: open-die forging and closed-die forging. They differ fundamentally in how they shape metal, what starting material they … Read more
When a re-roller specifies alloy steel billets for bearing rings, or a forge shop orders billets for critical automotive transmission components, the purchase order chemistry column tells only part of the story. A billet reading 0.38–0.45% C, 0.80–1.10% Cr, and 0.15–0.25% Mo – squarely within an AISI 4140 specification – can be either a reliable … Read more