Ceramic particle reinforced iron matrix composite has the double advantages of metal and ceramic,and it is an effective way to prolong the service life of roll sleeve and liner.1～1.5mm ZTA particle(ZrO2 toughened Al2O3)reinforced BTMCr26(ZTAp/HCCI)composites were prepared by negative pressure casting infiltration method.The composites were quenched at 920,980,400 and 1080℃ respectively.The optimum quenching temperature was selected and tempered at 200,300,400,500℃.The effects of heat treatment on the microstructure and three-body abrasive wear properties of the composites were studied.The results show that the matrix microstructure of BTMCr26 composites after quenching at 1040℃ and tempering at 400℃ is tempered martensite,retained austenite,eutectic carbide and secondary carbide.The hardness of matrix in BTMCr26 matrix and composite zone is the highest,and the cumulative volume loss in three-body wear test is the minimum.The wear amount of the roller sleeve and liner of the coal mill prepared by this process is about 0.8mm/m,and the service life is about 2.5～3 times of that of BTMCr26 material.
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