CAJ | 학술논문

利用铸渗复合原位反应技术,将微米级直径铬合金丝与灰铸铁进行铸渗复合,并保温进行原位反应,铬合金丝中铬原子与铸铁基体中的铁、碳原子原位反应制备颗粒增强铁基复合材料.对复合区进行显微组织观察和分析,显微硬度测量.结果表明,原位反应产物为不规则的(Cr,Fe)7C3颗粒,均匀分布在铬合金丝中心;沿晶界分布的(Cr,Fe)23C6作为原位反应过程中的中间产物出现;中心复合Ⅸ域显微硬度最高值达到1452HV0.05,复合区域的平均显微硬度为1175HV0.05.是基材的4倍左右.
이용주삼복합원위반응기술,장미미급직경락합금사여회주철진행주삼복합,병보온진행원위반응,락합금사중락원자여주철기체중적철、탄원자원위반응제비과립증강철기복합재료.대복합구진행현미조직관찰화분석,현미경도측량.결과표명,원위반응산물위불규칙적(Cr,Fe)7C3과립,균균분포재락합금사중심;연정계분포적(Cr,Fe)23C6작위원위반응과정중적중간산물출현;중심복합Ⅸ역현미경도최고치체도1452HV0.05,복합구역적평균현미경도위1175HV0.05.시기재적4배좌우.
Using the method of casting and heat treatment,grey east iron and micron-size Cr alloy wires were compounded.The reinforcement phases were in-situ synthesized between Cr alloy wires and graphite phases as well as iron phases in grey cast iron by heat treatment.The microstructure and microhardness of compound region were observed and measured.The results show that the in-situ synthesized(Cr,Fe)7C3 particles are tiny irregular and distribute evenly in the center of Cr alloy wires,and intermediate product(Cr,Fe)23C6 distributes along the grain boundary.The maximal microhardness of the compound region is 1175HV0.05 and the average microhardness is 4 times more than iron matrix.