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利用吹氩加入法制备了含微量纳米Ti N的ZGMn13钢,研究了外加Ti N颗粒在高锰钢中的存在形式以及对奥氏体组织形态的影响。运用扫描电镜及其附带的能谱仪、透射电镜等手段,分析了Ti N和ZGMn13钢的微观组织形貌、化学成分以及相结构。结果表明,Ti N纳米粒子部分团聚长大,另一部分仍以纳米形态存在于奥氏体中,且与奥氏体具有较好的界面匹配关系;奥氏体与Ti N具有[1ˉ11]γ//[1ˉ11]N、(202)γ//(202)N,[1ˉ11]γ//[1ˉ11]N、(220)γ//(220)N,[1ˉ11]γ//[1ˉ11]N、(422)γ//(422)N以及[1ˉ12]γ//[0 1ˉ1]N、(220)γ//(022)N,[1ˉ12]γ//[0 1ˉ1]N、(1 1ˉ1)γ(200)N的晶体学位向关系,并且(1 1ˉ1)γ晶面与Ti N的(200)N晶面呈现共格现象;此外,基体奥氏体中存在着高密度相互缠结的位错,局部区域出现与奥氏体具有(1100)ε//(1 1ˉ3)γ、[0001]ε//[1 5ˉ2]γ的晶体学位向关系的相互平行的针状ε-马氏体,且两相界面共格。
ZGMn13 steel containing a small amount of nano-TiN was prepared by argon blowing method. The existence of TiN particles in high manganese steel and the effect on the morphology of austenite were investigated. The microstructure, chemical composition and phase structure of TiN and ZGMn13 steel were analyzed by scanning electron microscopy (SEM) and its accompanying spectrometer and transmission electron microscope (TEM). The results show that some of the TiN nanoparticles aggregate and grow while the other part still exists in austenite in the nano-morphology and has a good interfacial relationship with the austenite. The austenite and TiN have [1-11] γ / / [1-11] N, (202) γ // (202) N, [1-11] γ // [1-11] N, (220) γ // (220) N, [1-11] γ // [1-11] N, (422) γ // (422) N and [1ˉ12] γ // [0 1 ˉ1] N, (220) γ // (022) N, [1 ˉ12] γ // [0 1 ˉ1] N, (1 1 ˉ1) γ (200) N, and the (1 1 ˉ 1) γ crystal plane and the (200) N crystal plane of TiN show a coherent phenomenon. In addition, there is a high density of intertwined bits In the local area, acicular ε-martensite parallel to the crystal orientation of austenite with (1100) ε // (1 1ˉ3) γ, [0001] ε // [1 5ˉ2] And the two-phase interface coherent.