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Improved mechanical properties of mild steel via combination of deformation, intercritical annealing, and quench aging

机译：通过变形，跨临界退火和淬火老化的组合改善了温和钢的机械性能

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摘要

Processing of dual phase steel with fine ferrite grains containing nanometric carbides and chain-like morphology of martensite from a 0.035C-0.005N-0.035Si-0.268Mn mild steel was realized via application of high cold rolling reductions, intercritical heat treatment, and room-temperature aging, which showed a yield stress (YS) of 450 MPa and ultimate tensile strength (UTS) of 700 MPa. It was revealed that significant enhancements in tensile properties can be achieved compared to the separate effects of intercritical annealing (YS of 130 MPa and UTS of 385 MPa), cold rolling and intercritical annealing (YS of 300 MPa and UTS of 600 MPa), and quench aging (YS of 275 MPa and UTS of 520 MPa). The results were rationalized based on the grain size strengthening, aging effect, and work-hardening behavior.
机译：通过施加高冷轧减少，跨临界热处理和空间，实现了从0.035℃-0.005N-0.035SI-0.268Mn温和钢的纳米碳化物和链形形貌的双相钢的处理。 - 锻造老化，其显示为450MPa的屈服应力（Ys）和700MPa的最终拉伸强度（UT）。揭示了与跨临界退火（YS为385MPa的YTS）的单独效应相比，可以实现拉伸性能显着增强，冷轧和跨临界退火（YS为300MPa和600MPa的UT），以及淬火老化（ys为275 mpa和520 mpa的UT）。结果基于强化晶粒尺寸，老化效应和工作 - 硬化行为合理化。

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