Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Microstructure of cast iron obtained because of quenching with isothermal transformation of ductile iron to the austempering temperature, Taustempering = 430 °C, and austempering time, τaustempering = 30 min (a), and 120 min (b), etched with B-M reagent.
