钨精矿粉掺杂Fe-Al合金激光引燃自蔓延合金组织及性能  

Microstructure and properties of Fe-Al alloy blended with tungsten concentrate powder prepared by laser ignition induced SHS

作　　者：李刚[1] 于君娜[1] 

机构地区：[1]辽宁工程技术大学材料科学与工程学院,阜新123000

出　　处：《复合材料学报》2013年第2期132-136,共5页Acta Materiae Compositae Sinica

基　　金：辽宁省科学事业公益研究基金计划项目

摘　　要：在钨精矿粉质量分数为1%前提下,通过改变Al原子分数,分别为50%、60%、70%、80%,对其粉末进行压制,进而将压坯激光点火,使其发生自蔓延合成反应生成Fe-Al合金,利用XRD、SEM、EDX、硬度测试、磨损测试等表征手段,分析研究了掺杂定量的钨精矿粉后,不同Fe、Al配比对烧结Fe-Al合金微观组织结构及宏观性能的影响。结果表明:在烧结过程中,压坯实现了自蔓延烧结。产物物相主要为AlFe、AlFe3、WO3、AlCrFe2等,且随着Al含量的增加,形成了富Al相。烧结Fe-Al合金组织随着Al含量的增加,伴随微小裂纹产生。当Al含量达到60%时,烧结Fe-Al合金显微硬度最大,达到HK1053;磨损率最低,为0.04mg.mm-2。When the mass fraction of the tungsten concentrate powder is 1%,changing the atom fraction of Al with 50%,60%,70%,80%,Fe-Al alloy was prepared by laser ignition induced SHS.By means of the XRD,SEM,hardness test and abrasion test,the effect of the content of Al on the microstructure and macroscopic properties of the sintering alloy was studied.The results show that through the sintering process,the self-propagating combustion synthesis of the blank is achieved.The product phases of the sintering alloy are AlFe,AlFe3,WO3,AlCrFe2 and with the increase of the content of Al,the Al-rich phases are formed.The structures of the sintering alloy appear small crackle,which grow up with the increase of the content of Al.When the atom fraction of the aluminum is 60%,the micro hardness of the sintering alloy is the biggest,which is HK1053,and the relative wear rate of the sintering alloy is the lowest,which is 0.04 mg·mm-2.

关 键 词：激光烧结 粉末冶金 钨精矿粉 微观组织 力学性能 

分 类 号：TB331[一般工业技术—材料科学与工程]