原位合成V_8C_7颗粒增强铁基复合材料的制备  

Preparation of V_8C_7 Particle Reinforced Fe Matrix Composite by Reaction Between Cast Iron and V Wire

作　　者：付永红[1] 叶芳霞[2] 许云华[1,2] 符道[3] 

机构地区：[1]西安建筑科技大学机电工程学院耐磨材料研究所,陕西西安710055 [2]西安理工大学材料科学与工程学院,陕西西安710048 [3]中国船舶重工集团公司,北京100097

出　　处：《热加工工艺》2012年第12期82-86,共5页Hot Working Technology

基　　金：国家自然科学基金项目(50974101)

摘　　要：采用铸渗和热处理原位反应工艺相结合的方法,将准1 mm的钒丝与灰铸铁进行复合,制成钒丝-灰铸铁复合预制体,并对其进行热处理,使钒丝中的钒原子与铸铁中的碳原子原位反应生成V8C7颗粒,制备出V8C7颗粒增强铁基复合材料。用SEM、XRD对该复合材料的显微组织和物相组成进行分析。结果表明,生成的V8C7颗粒均匀分布于铁基体中,且生成物与基体有很好的冶金结合,反应区主要由α-Fe和V8C7颗粒组成;应用热力学原理对原位合成V8C7颗粒的反应机理进行分析,表明用此方法制备的V8C7增强相在热力学上是可行的。In-situ synthesized V8C7 particles reinforced iron matrix composite was produced by casting and heat treatment process employing Ф1mm vanadium wires and grey cast iron. The microstructure and phase of the composite was analyzed by SEM and XRD. The results show that the V8C7 particles synthesized by in-situ reaction distribute evenly in the grey cast iron. There is good metallurgy-bonding between the composite and matrix. The composite mainly consists of α-Fe and V8C7 particles. The mechanism of VC fabricated by in-situ synthesis was analyzed by thermodynamics principles. The thermodynamics calculation results show that V8C7 produced by in-situ synthesis is possible in thermodynamics.

关 键 词：钒丝 铸渗复合 原位反应 V8C7 

分 类 号：TG139.8[一般工业技术—材料科学与工程] TB331[金属学及工艺—合金]