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首页> 外文期刊>International Journal of Minerals,Metallurgy and Materials >Nanoscale precipitates and comprehensive strengthening mechanism in AISI H13 steel
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Nanoscale precipitates and comprehensive strengthening mechanism in AISI H13 steel

机译：AISI H13钢中的纳米级析出物和综合强化机理

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摘要

The effects of heat treatment on the precipitates and strengthening mechanism in AISI H13 steel were investigated. The results showed that the presence of nanoscale precipitates favorably affected grain refinement and improved the yield strength. The volume fraction of precipitates increased from 1.05% to 2.85% during tempering, whereas the average precipitate size first decreased then increased during tempering. Contributions to the yield strength arising from the various mechanisms were calculated quantificationally, and the results demonstrated that grain refinement and dislocation density most strongly influenced the yield strength. In addition, under the interaction of average size and volume fraction, precipitates' contribution to the yield strength ranged from 247.9 to 378.5 MPa. Finally, a root-mean-square summation law of sigma = sigma(g) + sigma(s) + (sigma(d) (2) + sigma(p) (2))(1/2), where sigma(g), sigma(s), sigma(d), and sigma(p) represent the contributions of fine-grain strengthening, solid-solution strengthening, dislocation strengthening, and precipitation strengthening, respectively, was confirmed as the most applicable for AISI H13 steel, which indicates a strong link between precipitates and dislocations in AISI H13 steel.
机译：研究了热处理对AISI H13钢中析出物和强化机理的影响。结果表明，纳米级析出物的存在有利地影响了晶粒细化并提高了屈服强度。在回火过程中，析出物的体积分数从1.05％增加到2.85％，而在回火过程中，平均析出物尺寸先减小然后增大。定量计算了各种机理对屈服强度的贡献，结果表明晶粒细化和位错密度对屈服强度的影响最大。此外，在平均尺寸和体积分数的相互作用下，析出物对屈服强度的贡献范围为247.9至378.5 MPa。最后，sigma = sigma（g）+ sigma（s）+（sigma（d）（2）+ sigma（p）（2））（1/2）的均方根总和定律，其中sigma（g ），sigma（s），sigma（d）和sigma（p）分别代表了细晶粒强化，固溶强化，位错强化和沉淀强化的贡献，已被确认是最适用于AISI H13钢的，表明AISI H13钢中的析出物与位错之间有很强的联系。

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