Study On The Preparation Processing Of Vanadium Carbide Reinforced Ferrous Matrix Composite Based On Powder Metallurgical Reactive Synthesis Technology

With the correct compound designing and the optimization of processing parameter selection, a kind of vanadium carbide reinforced metallic matrix composite is produced in situ by powder metallurgical technology. The effect of milling technological parameter and carbon/vanadium ratio to the densification was studied using particle-size analyzer, optical microscope and scanning electronic microscope (SEM); Decomposition mechanism ofσphase in Fe-V-C ternary system is investigated by means of X-ray diffraction (XRD) and DTA (differential thermal analysis); Microstructure of the composite is analyzed with help of scanning electronic microscope (SEM), electronic probe microanalysis (EPMA) and XRD.Ball milling processing to the densification of sample is indicated as follow(1)powdered alloy with milling 24 hours shows smaller of the average particle size compared with the milling 36 hours and has more even particle distribution due to the particles happen cold weld each other when grinds 36 hours which belongs to the second stages of mechanical alloying(.2)the grinder 36 hours'samples which obtain the maximum volumetric shrinkage at a relative lower temperature have bigger volumetric shrinkage compared with the grinder 24 hours'samples.(3)the higher carbon/vanadium ratio is usually help to the sample obtaining maximum volumetric shrinkage the earlier.(4)the longer of the milling time of the powdered alloy, the...