Austempering of Ductile Iron (ADI): Cycle Design, Quench and Quality Gates
A practical ADI heat treatment guide: how to choose the austenitize → isothermal quench → hold cycle, what grade ranges deliver which strength/ductility, and how to control distortion, retained austenite and hardness—with YB Metal quality gates and an RFQ checklist. Executive summary What changes from ductile iron to ADI (metallurgy & benefits) Cycle design: austenitize,…