process of heat treating used to increase the toughness of iron-based alloys
Differentially tempered steel. The various colors produced indicate the temperature the steel was heated to. Light straw indicates 204 °C (399 °F) and light blue indicates 337 °C (639 °F).
Tempering is a process of heat treating, which is used to increase the toughness of iron-based alloys.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).