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首页> 外文会议>International Conference on Recrystallization and Grain Growth(ReX amp; GG III); 20070610-15; Jeju Island(KR) >Formation of Ultra Fine Grained Structure during Annealing of Heavily Drawn Metastable Austenitic Steel Wire
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Formation of Ultra Fine Grained Structure during Annealing of Heavily Drawn Metastable Austenitic Steel Wire

机译：重拉伸亚稳奥氏体钢丝退火过程中超细晶粒组织的形成

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摘要

It is well known that the ultra grain refinement can be achieved by sever cold rolling, followed by reversion treatment in metastable austenitic stainless steel plate. In this study, the cold rolling was replaced by cold drawing. This procedure was applied to a metastable austenitic steel (Fe-16Cr-10Ni alloy) thin wire, and then the microstructure development during cold drawing and annealing was investigated. The austenite phase transformed to martensite during the drawing. Vickers hardness of the wire markedly increased with increasing the drawing strain. When the drawing strain reached about 4.5, the wire exhibited martensite single structure and had high hardness of Hv4.4GPa. Annealing of the heavily drawn wire at around 900K for 0.6ks leads to the formation of reversed austenite with the diffusional reversion mechanism. As a result, ultra fine-grained austenitic single structure with the grain size of about 0.6μm was obtained. It was also found that the wire has an excellent combination of a strength and ductility.
机译：众所周知，可以通过严格的冷轧，然后在亚稳态奥氏体不锈钢板中进行还原处理来实现超细晶粒的细化。在这项研究中，冷轧被冷拔代替。将该程序应用于亚稳奥氏体钢（Fe-16Cr-10Ni合金）细线，然后研究了冷拔和退火过程中的显微组织发展。在拉伸过程中，奥氏体相转变为马氏体。导线的维氏硬度随着拉拔应变的增加而明显增加。当拉伸应变达到约4.5时，线材表现出马氏体单一结构并且具有高的Hv4.4GPa硬度。在900k左右将重拉丝退火0.6ks会导致通过扩散回复机制形成反向奥氏体。结果，获得了晶粒尺寸为约0.6μm的超细晶粒奥氏体单一结构。还发现金属丝具有强度和延展性的优异组合。

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