Abstract: After intercritical
treatment, the structure and properties of 18SiMnCu cold rolled
sheet steel is studied. When the sheet steel held at 780℃ and
followed by 25℃ / s colling rate, a composite structure of (F+M+A)
and optimum mechanical properties were obtained: σs=300MPa, σb=750MPa,
δ=27%, n=0.27. The transformation process of retained austenite
was examined by x-ray and TEM.
Key words:
18SiMnCu Dual-phase steel Microstructure Mechanical property
Manuscript received on August
5, 1993; revised manuscript October 10, 1993
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