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B4C粒度对45钢基表面复合材料组织的影响
Effect of B4C Particle Size on Microstructure of 45 Steel Matrix Surface Composites
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- DOI:
- 作者:
- 韩文华 宋博宇 刘桂荣
HAN Wenhua;SONG Boyu;LIU Guirong
- 作者单位:
- 包头职业技术学院材料工程系
Material Engineering Department, Baotou Vocational & Technical College, Baotou 014035, China
- 关键词:
- B4C粉末粒度 表面复合材料 TIC颗粒 TIB2颗粒
B4C powder size surface composites TiC particles TiB2 particles
- 摘要:
- 研究了Ti、B4C和Ti-Fe混合粉体系自蔓延高温合成制备金属基复合材料时,B4C粉粒度对复合材料组织的影响。结果表明,B4C粉末粒度减小,有利于促进高温钢液点燃合金粉末预制块中的各组元,使得各组元的反应充分;生成的TiC和TiB2增强颗粒的数量也随着增加,且尺寸呈现趋于细小的趋势。当B4C粉末粒度为500目时,复合材料距离复合层外表面0.5 mm处的硬度为1 693 HV。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.