【摘要】 对爆炸后高锰钢的表层和亚表层的物相进行XRD分析,对爆前、爆后衍射花样进行标定,对显微组织进行对比分析。结果表明:爆炸硬化处理后高锰钢的组织仍为奥氏体,未发生马氏体转变。爆炸硬化的微观机理为:在炸药爆炸产生的巨大爆轰压力作用下,爆后高锰钢晶体各晶面的晶格常数增大,加剧了晶格畸变,在高锰钢内部形成大量位错和层错,这些高密度的位错和层错阻碍位错运动,使高锰钢硬化。更多还原

【Abstract】 The diffraction pattern and microstructure of unexploded and exploded high-manganese steel were analyzed by XRD(X-ray Diffraction) and HREM(High Resolution Electron Microscopy).The results reveal that the microstructure of exploded high manganese steel is still austenite,without martensitic transformation,and also indicate the microscopic mechanics of explosion hardening is that the interior of the exploded high manganese steel is impacted by high energy blast wave of explosion,lattice constant increases and the lattice distortion is aggravated.Large high density faults and dislocations appear,which can hinder the dislocation movement,then resulting in the hardening of high-manganese steel.更多还原