Chapter 4: Low-Carbon Irons and Steels
This chapter focuses on sheet and strip steels produced by various steelmaking and processing technologies. It begins with a description of the factors that determine size and shape of ferrite grains in steel. This is followed by sections discussing microstructural features of and the processes involved in annealing of hot-rolled and cold-rolled strips. The development of abnormally large grains during subcritical annealing treatments is then described. The chapter further considers a number of structures representative of commercial practice of batch or box annealing and continuous annealing. The structural changes during heat treatments of strip steels between and above the critical temperature are also reviewed. The chapter ends with a discussion on the effects of quench aging and strain aging in ferrite.
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