摘要
采用粉末冶金法制备Al2O3颗粒增强Fe基复合材料,利用XRD、SEM及显维硬度计研究Al2O3含量、C元素及Mo元素对该复合材料烧结性能、显微组织及硬度的影响。结果表明:未添加C元素的复合材料基体为α-Fe,添加C元素时基体为α-Fe和Fe3C相;未添加Mo元素时,增强体为α-Al2O3相;添加Mo元素时,增强体为FeAl2O4相。硬度分析可知,添加C元素,可显著提高试样基体的硬度,5%Al2O3+3%C试样基体硬度为500HV,淬火后硬度高达900HV左右,比淬火前提高了76.7%;添加Mo元素的试样基体硬度也有所提高,但提高幅度较小。
Fe matrix composite reinforced with A12O3 particles was fabricated by the powder metallurgic method. The influences of the contents of A12O3, C and Mo on the sintering character, micro-structure and micro-hardness of the Fe matrix composite were characterized by XRD, SEM and microscopic hardness meter. The results show that the Fe matrix composite reinforced with A12O3 particles is fabricated successfully with powder metallurgy method. The matrix of the composite without and with C element are a-Fe and a-Fe＋Fe3C, respectively. The reinforced phases of specimens without and with Mo element are a-A1203 and FeA12O4, respectively. The addition of C could increase the matrix hardness of specimen significantly. The matrix hardness of specimen with 5%A1203 ＋ 3%C is 500 HV, and it could be up to 900 HV after quenching, improving 76.7% than that of before quenching. And the addition of Mo increases the matrix hardness of specimen.
出处
《热加工工艺》
CSCD
北大核心
2011年第24期120-123,共4页
Hot Working Technology
基金
河南省教育厅自然科学研究项目(2008IRTSTHN001)
河南科技大学大学生研究训练计划项目(SRTP2010109)
关键词
铁基复合材料
微观组织
氧化铝
粉末冶金法
Fe matrix composites
microstructure
aluminium
powder metallurgic method
