Research on Preparation and Heat Treatment Process of Ceramic Particle Reinforced BTMCr26 Composites
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.
万方数据
维普
