The Developments of Cold-rolled TRIP-assisted Multiphase Steels. Al-alloyed TRIP-assisted Multiphase Steels
The Developments of Cold-rolled TRIP-assisted Multiphase Steels. Al-alloyed TRIP-assisted Multiphase Steels
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DOI：
10.2355/isijinternational.41.1068
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发表时间：
2001-09
影响因子：
1.8
通讯作者：
P. Jacques;É. Girault;P. Harlet;F. Delannay
中科院分区：
文献类型：
--
作者：
P. Jacques;É. Girault;P. Harlet;F. Delannay
研究了热处理条件对含不同量硅和/或铝的TRIP辅助多相钢种富碳奥氏体保留率的影响。随后的机械性能所产生的TRIP效应也仔细检查。贝氏体转变动力学之后，通过金相测量，而详细的表征的微观结构导致的建设的转变地图，给出不同的相的体积分数和奥氏体的碳含量。硅和铝的加入（i）对部分贝氏体转变的奥氏体保留和（ii）对机械性能的作用是启发。突出了硅的固溶强化效应的强烈影响。铝似乎是一种有效的合金元素，即使可以达到较低的强度水平，在TRIP辅助钢的奥氏体的保留。混合的Al-Si TRIP辅助钢似乎是加工需求、所需的机械性能和工业限制之间的非常好的折衷。
The influence of heat-treating conditions on the retention of carbon-enriched austenite of TRIP-assisted multiphase steel grades containing different amounts of silicon and/or aluminium is investigated. The ensuing mechanical properties resulting from the TRIP effect are also scrutinised. The bainite transformation kinetics was followed by dilatometry whereas a detailed characterisation of the microstructures led to the construction of transformation maps giving the volume fractions of the different phases and the carbon content of austenite. The role of silicon and aluminium additions (i) on the retention of austenite by partial bainite transformation and (ii) on the mechanical properties is enlightened. A strong influence of the solid-solution strengthening effect of silicon is highlighted. Aluminium seems to be an effective alloying element for the retention of austenite in TRIP-aided steels even if lower strength levels can be attained. A mixed Al-Si TRIP-aided steel seems to be a very good compromise between the processing needs, the required mechanical properties and the industrial constraints.