CAJ | 학술논문

GCr15粉末冶金烧结钢被普遍用于制造各种模具，硬度要求较高，但其中的残余奥氏体会使硬度降低，因此，检验残余奥氏体的体积分数是非常重要的。含有残余奥氏体的粉末冶金磁化曲线和电导率不同于普通粉末冶金，所以，基于电磁检测方法通过测量电磁性质的变化来检测残余奥氏体的体积分数是可能的。 GCr15粉末冶金烧结钢中残余奥氏体的电磁检测技术是基于非线性有限单元法的三维六面体边缘检测（有限元法），解释说明了利用该检验方法检测残余奥氏体的可能性，并经过了严格的实验验证。
GCr15분말야금소결강피보편용우제조각충모구，경도요구교고，단기중적잔여오씨체회사경도강저，인차，검험잔여오씨체적체적분수시비상중요적。함유잔여오씨체적분말야금자화곡선화전도솔불동우보통분말야금，소이，기우전자검측방법통과측량전자성질적변화래검측잔여오씨체적체적분수시가능적。 GCr15분말야금소결강중잔여오씨체적전자검측기술시기우비선성유한단원법적삼유륙면체변연검측（유한원법），해석설명료이용해검험방법검측잔여오씨체적가능성，병경과료엄격적실험험증。
Since the GCr15 powder metallurgy is used for the various mould production ,the hardness of it should be high .The hardness is rapidly reduced by the appearance of the retained austenite in GCr 15.Therefore,the inspection of volume fraction of retained austenite in GCr15 is important.The B-H curve and the conductivity of the GCr15 powder metallurgy containing the aus-tenite are different from those of powder metallurgy .Then,the detection of retained austenite is possible by measuring the change of electromagnetic properties using anelectromagnetic inspection method .The electromagnetic inspection technique of retained austenite in the GCr15 powder metallurgy is examined using 3-D edge-based hexahedral nonlinear Finite Element Method (FEM).The possibility of detecting the retained austenite using the proposedinspection method is illustrated .In addition,the ex-perimental verification is also carried out .