摘要
提出一种直接在铸态下使用的、且具有较高韧性（ａｋ为４９．３～８０．３Ｊ／ｃｍ３，带Ｕ形缺口）和在小能量多冲击下具有很强加工硬化能力（锤后硬度ＨＲＣ５４～４７）的奥氏体基锰钢。测试表明，该材质组织为稳定性很低并带有大量层错的奥氏体加少量。马氏体，耐磨性比传统的Ｍｎ１３钢提高５６％～７３％。
A castable Mn steel with extra-unstable-Austenite mirco structure is discussed in this paper. This steel POssesses high toughness (ax value is between 49. 3 and 80. 3 J/cm2 for V-type notched sample) and high working hardenability under low energy impact stress (HRC=47-54 after hammering). Experimental results show that the microstructure of this steel is composed of the unstable Austenite with a high density of stacking fault and a small amount of s martensite. Simulated wear tests show that the wear resistance of this steel is increased up to 56%-70% as compared with that of the typical Mn13 steel. Under medium abrasive wear situations, this steel is suitable for thick section castings or for unstable-treatable castings with a complex shape.
关键词
低碳高锰钢
超低稳奥氏体
耐磨性
锰钢
铸态
low-cabon-high-msnganese steel
extra-unstable austenite
ε-martensite
wear resistance
