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对Fe-23.8Mn-0.4C-3.7Cr高锰奥氏体钢进行50%冷变形,利用光学显微镜(OM)、X射线衍射仪(XRD)、扫描电镜(SEM)、透射电镜(TEM)、维氏硬度计、纳米硬度计和万能试验机等研究了冷变形对高锰奥氏体钢组织和力学性能的影响。结果表明:高锰奥氏体钢冷变形前后的微观组织均为奥氏体组织,但变形后晶粒内部产生了大量变形孪晶;变形后高锰奥氏体钢的硬度和强度大幅度提高,冷变形也导致其应变硬化行为和断裂行为发生改变,塑性显著下降。
Abstract：50% cold deformation of Fe-23.8Mn-0.4C-3.7Cr high manganese austenite steel was carried out.The effects of cold deformation on microstructure and mechanical properties of the high manganese austenite steel were studied by means of optical microscope( OM),Xray diffractometer( XRD),scanning electron microscopy( SEM),transmission electron microscopy( TEM),Vickers hardness tester,nano hardness tester and universal testing machine.The results show that the microstructure of the high manganese austenite steel before and after cold deformation is austenite structure,but a large number of deformation twins are observed in the grains after cold deformation,the hardness and the strength of the high manganese austenite steel increase greatly after cold deformation,cold deformation also leads to the change of strain hardening behavior and fracture behavior of the steel,and the plasticity decreases significantly.
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基本信息:
DOI：10.13289/j.issn.1009-6264.2019-0157
中图分类号:TG142.25;TG335.12
引用信息:
[1]王金明,万响亮,王红鸿等.冷变形对高锰奥氏体钢组织以及力学性能的影响[J],2019,40(09):100-106.DOI:10.13289/j.issn.1009-6264.2019-0157.
基金信息:
国家自然科学基金(51501134)