高能量冲击接触载荷下高锰钢组织形态与加工硬化机制  

Microstucture Morphologies and Work Hardening Mechanism of Hadfield Manganese Steel in High Energy Impact Contact Load

作　　者：许云华[1] 付永红[2] 王发展[2] 杨军亚[3] 朱金华[1] 

机构地区：[1]西安交通大学材料强度国家重点实验室,西安710049 [2]西安建筑科技大学耐磨材料研究所,西安710055 [3]武警工程学院电子技术系,西安710043

出　　处：《热加工工艺》1999年第6期3-4,7,共3页Hot Working Technology

摘　　要：滑移和孪生仍然是高能量冲击接触载荷下高锰钢变形的方式；位错、孪晶、微晶和非晶态组织是高锰钢变形的主要组织形态，位错胞是高锰钢在冲击载荷下特有的亚结构；高密度变形条带相互交叉、阻滞或截割，使奥氏体组织严重细化，变为微晶甚至是纳米晶，同时发生严重的点阵畸变，使晶体的自由能升高，晶体变成非晶态，微晶与非晶态的产生是高能量冲击载荷下，高锰钢加工硬化的一个很重要的机制。Slip and rwining are also deformation style of hadfield manganese steel under high impact energy;Dislocation,twin,nano sized grain and amorphous phrase are main morphologies of worn surface because of deformation.Dislocation cell is peculiar microstructure of hadfield manganese steel under impact contact load;Intersecting,blocking,cutting each other of deformation bands with high density cause serious fragment of grain which become nano sized grain and distortion of lattice which raises the free energy of crystal beyond that of the amorphous phase,so that crystal becomes the amorphous phase eventually.Coming into being of nano sized grain and the amorphous phase is a important mechanism of work hardening of hadfield manganese steel under high energy impact contact load.

关 键 词：高锰钢 加工硬化 冲击载荷 冲击试验 组织形态 

分 类 号：TG142.72[一般工业技术—材料科学与工程]