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首页> 外文会议>International Conference on Processing amp; Manufacturing of Advanced Materials Pt.2; Jul 7-11, 2003; Leganes, Madrid, Spain >A QUANTITATIVE STUDY OF INTERPHASE PRECIPITATION IN A COMMERCIAL MICROALLOYED STEEL
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A QUANTITATIVE STUDY OF INTERPHASE PRECIPITATION IN A COMMERCIAL MICROALLOYED STEEL

机译：商业微合金钢中相析出的定量研究。

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The role of interphase precipitation as a strengthening mechanism in microalloyed steels is not very well understood. It is known to be important, but there is a lack of quantitative information due to the fact that interphase precipitation occurs in only part of the ferrite grains. This paper presents an investigation "grain-by-grain" of a commercial hot strip steel, in an attempt to determine the number of ferrite grains strengthened by interphase precipitation, and thus to quantify the real effect of this precipitation mode on yield strength. Microhardness measurements and transmission electron microscopy observations were employed as the most important experimental techniques, both showing that interphase precipitation had occurred in about one half of the total number of ferrite grains. Well established theoretical models were used to determine the extent of precipitation and dislocation hardening. Somewhat similar contributions of between 50 to 100 MPa were found to come from interphase precipitation, precipitation in austenite and dislocation strengthening. Interphase precipitation and dislocation strengthening were strongly reduced by a subsequent normalizing heat treatment.
机译：对于微合金钢中相间沉淀作为强化机制的作用还不是很了解。众所周知这很重要，但是由于相间沉淀仅在部分铁素体晶粒中发生，因此缺乏定量信息。本文提出了一种对商用热轧带钢进行“逐个晶粒”的研究，以试图确定由相间析出强化的铁素体晶粒数量，从而量化这种析出方式对屈服强度的实际影响。显微硬度测量和透射电子显微镜观察被用作最重要的实验技术，两者均表明在铁素体晶粒总数的一半左右发生了相间沉淀。完善的理论模型用于确定沉淀和位错硬化的程度。发现相间沉淀，奥氏体中的沉淀和位错强化在50到100 MPa之间有相似的贡献。随后的正火热处理大大减少了相间析出和位错强化。

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