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采用不同的X射线设备对注射成形的MIM418涡轮进行检测,并对缺陷进行了解剖,采用光学显微镜(0M)和扫描电镜(SEM)观察其形貌,由EDS确定其成分,采用MIMTAB软件对涡轮不同部位的缺陷进行了统计分析,并研究了热等静压(HIP)对缺陷的影响。研究结果表明:胶片X射线设备比实时呈像具有更高的检测灵敏度,微焦点射线设备,不适用于MIM418涡轮的检测,X射线检测和缺陷形貌观察表明在涡轮心部易于形成裂纹,相对于心部,在叶片处的气孔型缺陷更多一些,采用HIP可大幅度降低气孔型缺陷,但裂纹并不能愈合。
The injection molding MIM418 turbine was detected by different X-ray equipment, and the defect was dissected. The morphology was observed by optical microscope (OM) and scanning electron microscope (SEM). The composition was determined by EDS. The MIMTAB software was used to simulate the turbine Different parts of the defects were statistically analyzed and studied the impact of hot isostatic pressing (HIP) on defects. The results show that the film X-ray equipment has higher detection sensitivity than the real-time imaging. The micro-focus ray equipment is not suitable for the detection of the MIM418 turbine. X-ray inspection and defect morphology observation show that cracks are easy to form in the heart of the turbine. In the heart, there are some more air-hole defects at the blade. Using HIP can greatly reduce the air-hole defects, but the crack does not heal.