ABSTRACT

A dual-phase steel chemistry has been processed with varying intercritical annealing temperatures and the properties investigated. It was found that increasing the temperature in the intercritical region led to an increase in the volume fraction (52%–65%) and grain size (1.8–3.3 µm) of martensite whilst the volume fraction and grain size of ferrite decreased. The highest tensile strengths were found at low intercritical temperatures, achieving 935 MPa whilst the highest elongation values of 21% were achieved at the highest intercritical temperatures.

中文翻译：

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临界区退火对双相钢力学性能的影响

摘要

一种双相钢化学成分已在不同的临界退火温度下进行了加工，并对其性能进行了研究。结果表明，提高临界区温度会导致马氏体的体积分数（52%–65%）和晶粒尺寸（1.8–3.3 µm）增加，而铁素体的体积分数和晶粒尺寸会减小。在低临界温度下发现最高的拉伸强度，达到 935 MPa，而在最高临界温度下达到 21% 的最高伸长率值。