Editor’s note: The following is an edited (for length) transcription of an interview between SECO/WARWICK’s Tom Hart and Dan Herring, The Heat Treat Doctor. It was part of the company’s E-Seminar held in September 2020.

Dan Kay answers a reader question about post-brazing distortion.

We often look to sophisticated tools for answers, but there is a simple, yet highly effective, method for quantifying our furnace’s performance – the Navy C-ring test.

The rolling and thermal treatment of forged rings sometimes leaves residual stresses that cause dimensional distortion.

The problem of retained austenite is twofold.

Quenching is perhaps the area in a heat-treat operation where the problem of distortion will occur.

In order to establish a more effective and economic production system, the goal is to move away from batch-type logistics and toward “one-piece-flow” production.

This is a question submitted from a reader in Rochester, N.Y.

Induction heat treatment is a common method for heat treating different automotive components, including camshafts, which belong to the group of critical engine/powertrain components. Now a new approach makes it possible to induction harden camshafts with almost undetectable distortion.

We introduced the IFHTSE Liquid Quenchants Database project about one year ago.