【摘要】 为探索模具钢表面抛光新工艺,采用强流脉冲电子束(HCPEB)对奥氏体模具钢Cr12Mo V粗糙表面进行辐照处理。通过OM、SEM、XRD分析处理试样表面形貌及结构,采用RM-20表面粗糙度仪、FM-300显微硬度计和摩擦磨损试验机测试试样表面的粗糙度、显微硬度和摩擦系数的变化。结果表明:在较大束流强度作用下,试样表面的山脊形貌、熔坑等各种缺陷得到控制,表面粗糙度降低,结构细化;同时,提高了试样表面的显微硬度,改善了摩擦性能。更多还原

【Abstract】 In order to explore the newprocess of mold steel polishing,the rough surface of austenitic mold steel Cr12 Mo V was irradiated by high current pulsed electron beam( HCPEB). The morphology and structure of the irradiated surface were analyzed by optical microscope( OM),scanning electron microscope( SEM),X-Ray Diffraction( XRD),and the change of roughness,microhardness and friction coefficient of the samples were tested by RM-20 surface roughness tester,FM-300 microhardness tester and friction-wear testing machine. The results showed that the roughness reduces and the structure refines due to controlling all kinds of the defects of the samples,such as ridge morphologies,melting pits,etc.; at the same time,the microhardness increases and the friction performance improves on the sample surface.更多还原