摘要
以TiC0.7N0.3粉末为颗粒增强体,采用粉末注射成形技术将其与Ti2Ni1Cr0.8Mo0.5Cu基体钛合金(T5)合成,制备了TiC0.7N0.3颗粒增强钛基复合材料.所制备的复合材料,经腐蚀性能试验、磨损性能试验以及显微组织分析,确知其物理力学性能及显微组织为:相对密度＞95%,抗弯强度为950～1 150 MPa,硬度HRC35-45;可热处理,并在保持T5合金良好广谱耐蚀特性的基础上,显著提高耐磨性.复合材料中颗粒相仍为TiC0.7N0.3,加入量由3%增加到6%时,耐磨性提高45%;基体相烧结态为条状α+β相,热处理态为纤细针状α+β相.还用该技术直接近净成形制备了均质机用阀芯零件,以评价其制备和应用的技术经济特性.
The TiC_0.7N_0.3 particulates reinforced titanium matrix composites were prepared by powder injection molding,which was consisted of TiC_0.7N_0.3 particles and Ti2Ni1Cr0.8Mo0.5Cu base alloy(brand T5).After corrosion experiment,abrasion experiment and microstructural examination,it is sure that the composite performances are more than 95% relative density,9501150MPa bending strength,3545HRC hardness;the composites are heat-treatable and high wear resistance with good broad corrosion resistance of the original T5 alloy.The particles phases are still TiC_0.7N_0.3,the wear resistance increases 45% when particles increase from 3% to 6%.The base phases as sintered are strip α+β phase,as heat-treated are fine acicular α+β phase.The valve core components for homogenizer were directly near-net shape prepared by PIM.
出处
《粉末冶金材料科学与工程》
EI
2005年第6期344-349,共6页
Materials Science and Engineering of Powder Metallurgy
关键词
钛及其合金
复合材料
颗粒增强
粉末注射成形
titanium & titanium alloy
composite
particulate reinforced
powder injection molding
