Effect of Process Annealing Temperature on Some Tensile Properties and Microstructure of Cold Rolled 1010 Steel

Ali M. Alzreedy

المؤلفون

Ali M. Alzreedy Material Science & Engineering Department, Faculty of Engineering, Misurata University, Misurata, Libya.

الملخص

This paper aims to investigate the effect of temperature of process
annealing heat treatment on some tensile properties and microstructure
of cold-rolled 1010 steel. The cold-rolled sheet was cut into the
standard tensile test specimens and then the samples were annealed at
300, 400, 500, 550, 600, and 650oC. Tensile and microscopic tests were
conducted on the samples. Process annealing temperatures had a
significant effect on properties and microstructure. Yield and Ultimate
tensile strengths decreased massively from 638 and 662 MPa of the
cold rolled steel to 169 and 309 MPa respectively of the treated
samples at 650oC. On the other hand, percent elongation improved
noticeably from 2 to 35 percent. The microstructure showed a
formation of a new set of free-strain grains, that is, the recrystallization
temperature, starting at 600oC and finishing at 650oC. This range was
of the transition from brittle to ductile fracture. The dominant
microstructure was ferrite and pearlite, with elongated grains before
600oC and recrystallized grains at 600oC and above.

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