Mechanical and Structural Characteristics of a Rapidly Annealed, Drawing-Quality 0. 07%C Unkilled Steel.

Some mechanical properties and structural features of a 0. 07%C unkilled steel of drawing quality have been investigated after intercritical annealing in a tubular furnace with argon atmosphere or in a salt bath. The results show that, using an annealing cycle lasting about 10 min, it is possible to obtain a sheet with slightly higher medium normal anisotropy values and considerably higher hardening coefficients as compared with those obtained for the same sheet after box annealing.