【摘要】 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。更多还原

【Abstract】 ZGMn13 steel containing trace amounts of nanometer-sized Ti N was prepared by the method of argon insufflation. The existing forms of additional Ti N particles and the influence on the morphology of high manganese steel were investigated. The morphology, composition and structure of Ti N and ZGMn13 steel were analyzed by SEM, EDS and TEM.The results show that part of Ti N nano particles got together while the other existed in austenite in nanometer, and had a better matching relation with austenite. There were crystallographic orientation relationship of [ 1ˉ 11]γ//[ 1ˉ 11 ]N,(202)γ//(202)N, [ 1ˉ 11]γ//[ 1ˉ 11 ]N,(220)γ//(220)N, [ 1ˉ 11]γ//[ 1ˉ 11 ]N,(422)γ//(422)Nand [ 1ˉ 12]γ//[0 1ˉ 1]N,(220)γ//(022)N, [ 1ˉ 12]γ//[0 1ˉ 1]N,(1 1ˉ 1)γ//(200)Nbetween austenite and Ti N, and(1 1ˉ 1)γ//(200)Nhad a phenomenon of coherency. There were high density and mutual entanglement dislocations in the matrix, local region appeared paralleled ε-martensite which had the crystallographic orientation relationship of(1100)ε//(1 1ˉ 3)γ, [0001]ε// [1 5ˉ 2]γwith austenite, and they were coherency.更多还原