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Abstract: The influence of Mn and Si on mechanical properties of
severely cold-rolled and annealed pearlite in Fe-0.8C alloys with
various contents are investigated. With the addition of Mn and Si, the
tensile strength (sb) and yield strength (ss) of the cold-rolled and
annealed pearlite are vastly improved, but its effect on ductility of
the cold-rolled pearlite is negligible. The addition of Si is quite
effective in improving the ductility of the cold-rolled and annealed
pearlite, especially when the strength is at a higher level, i.e., lower
annealing temperature or shorter annealing period. The optimal
mechanical properties in the alloys with Mn or Si were developed after
annealing at 450 ℃ for short annealing periods (30 s to 120 s). The
combined addition of Mn and Si is more effective in improving the
mechanical properties of severely cold-rolled and annealed pearlite.
Key words: Alloying element Pearlite Cold rolling Annealing
Ultra-fine grains Mechanical property
CLC No: TG142.1
日本文部科学省重点科学研究基金(A)(10305050)和国家自然科学基金(钢铁研究联合基金)(50271061)资助项目.
Received 20040102, received in revised form 20041128
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