Effect of B4C Particle Size on Microstructure of 45 Steel Matrix Surface Composites
Author of the article:HAN Wenhua;SONG Boyu;LIU Guirong
Author's Workplace：Material Engineering Department, Baotou Vocational & Technical College, Baotou 014035, China
Key Words：B4C powder size surface composites TiC particles TiB2 particles
Abstract：
The effect of particle size of B4C powder on the microstructure of metal matrix composites was studied when Ti,B4C and Ti-Fe powders were prepared by self-propagating high-temperature synthesis. The results show that the reduction of B4C powder particle size is beneficial to promote the ignition of the components in the alloy powder prefabricated block with high temperature molten steel, and the reaction of each component is sufficient. The number of TiC and TiB2 enhanced particles also increased, and the size tended to be small. When the particle size of B4C powder is 500 mesh, the hardness at 0.5 mm from the outer surface of the composite layer is 1 693 HV.
