Air hardening (fans)

The sound of steel hardening using a forced-air quench (fans).
Certain alloys harden fully if cooled by air of a temperature above their transformation range. Larger sections are cooled in an airblast to achieve maximum hardness.

Metal Ravne is the legal successor to Železarna Ravne. The company's range includes a steel plant programme, which starts the production of all their rolled and forged products. Due to technological modernisation over recent years, the company has all the most important machinery for the production of high-quality steel, including a 45t UHP electric arc furnace, a vacuum ladle furnace and a state-of-the-art ‘teeming pit’ for high-class conventional ingots. Their range of products includes ingots, billets with rounded edges and wide flats, with round, flat and square sections, forged bars, machined forgings, discs, bushes, etc.

Sound recordist: Boštjan Troha
Photographer: Veronika Štampfl
Video recordist: Barbara Grilc