METAL INJECTION MOLDING ABSTRACT

New fuel systems for diesel engines require soft magnetic parts.  Their small size, complex shape, and quantities have prompted a reevaluation of Metal Injection Molded (MIM) parts for this application.  Past evaluation of the MIM Fe-3% Si parts had inferior properties as compared to wrought parts.  Recent improvements in Metal Injection Molding processing and continued pressure to decrease cost led to a new evaluation of MIM Fe-3% Si parts.  A MIM fuel injector solenoid armature was tested against a wrought armature.  The MIM Fe-3% Si armature properties compared favorably to the wrought Fe-2.5% Si armature.  The conclusion was the Metal Injection Molded armature could replace the wrought armature without compromising part performance.

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