摘要
开发出衬板用新型轻质Fe-Mn(23.8%)-Al(7.1%)-C(1.02%)钢,测试不同水韧温度处理后实验钢的力学性能。利用X射线衍射分析、显微组织及断口形貌观察、析出物能谱分析,研究不同的水韧温度对新型钢种的组织、力学性能、断裂机理的影响。结果表明:实验用钢的密度6.84 g/cm3,与普通高锰钢相比,密度下降约12.3%;在1050℃保温1 h水韧处理后综合性能最佳,其冲击韧性值(V型缺口)ak达到231.3 J/cm2,硬度为205 HB,抗拉强度为809.6 MPa,屈服强度410.9 MPa,断后伸长率为59.6%。断口形貌呈等轴韧窝状,断裂机理为典型微孔聚集型断裂。
The new type light-weight Fe-Mn( 23. 8%)-Al( 7. 1%)-C( 1. 02%) austenitic steel for lining plates was developed. Its mechanical properties were investigated after different temperatures water toughening treatment. The microstructure,fracture morphology,and precipitates of the steels were studied by means of X-ray diffraction( XRD),optical microscopy( OM),scanning electron microscopy( SEM) and energy dispersive spectrometer( EDS). Effects of different water toughening temperatures on the microstructure,mechanical properties and fracture mechanism were researched. Results show that the density of the steel is 6. 84 g / cm3,about 12. 3% less than that of common manganese steel. The steel has the best comprehensive performance after water toughening treated at 1050 ℃ for 1 h with the impact toughness values( V-notch) akof 231. 3 J / cm2,hardness of 205 HB,tensile strength of 809. 6 MPa,yield strength of 410. 9 MPa,and elongation of 59. 6%. The fracture morphology of the steel is dimples,and its fracture mechanism is typical microvoid coalescence fracture.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2015年第S1期84-90,共7页
Transactions of Materials and Heat Treatment
