Pretreatment of a metal matrix composite for hot isostatic pressing

摘要

The present invention provides a method for fabricating a metal matrix composite having high specific strength and stable performance and capable of fabricating at low cost, the method comprising heating a preform of metal matrix with reinforcing fiber to the temperature (f,g), which is below the high temperature region (At), of the plastic deformation temperature of the metal matrix in a pressure vessel having an initial processing pressure (a,b) and keeping for a predetermined time for a preparative treatment before the step of hot-isostatic-pressing the preform by keeping at a high temperature region (At) capable of HIP treatment and of diffusing welding temperature of the metal matrix in a pressure vessel; for instance, in case metal matrix is titan or titan alloy, the preparative treatment is conducted at a preparative treatment temperature of about 300°C to 700°C and at a pressure in the pressure vessel of about 30 to 100kg/cm2.