碳氧含量及其反应对93W-4.6Ni-1.9Fe-0.5Co合金力学性能与组织的影响(英文)  

Influences of Contents and Reaction of Carbon and Oxygen on Microstructure and Mechanical Properties of Sintered 93W-4.6Ni-1.9Fe-0.5Co Alloys

作　　者：李强[1] 杨晓峰[1] 乐国敏[1] 范辉[1] 

机构地区：[1]中国工程物理研究院,四川绵阳621900

出　　处：《稀有金属材料与工程》2015年第2期293-297,共5页Rare Metal Materials and Engineering

摘　　要：采用具有不同碳氧含量的初始粉末,利用真空液相烧结制备93W-4.6Ni-1.9Fe-0.5Co合金试样,研究碳氧含量的变化及其平衡反应对合金力学性能与组织的影响。结果表明,压坯在真空高温烧结过程中,原料自身含有的碳具有较强的脱氧能力,通过碳氧反应可减少合金中的氧、碳含量,阻止氧化物、碳化物夹杂的生成,在钨颗粒与粘接相之间形成牢固的界面。当合金总氧含量低于500μg/g时,合金的力学性能显著提高。Several 93W-4.6Ni-1.9Fe-0.5Co alloys have been prepared by liquid phase sintering in vacuum atmosphere using powders with different contents of carbon and oxygen. The microstructures and mechanical properties of sintered samples have been investigated. Results show that the carbon in the starting powders has a stronger deoxidization ability in the high temperature vacuum sintering process due to the carbon-oxygen reaction, which decreases the contents of carbon and oxygen in the sintered samples and prevents the formation of carbide and oxide inclusions, resulting in a strong interfacial boundary between tungsten and bonding phase. The mechanical properties are improved significantly when the oxygen content is controlled to be lower than 500μg/g.

关 键 词：钨合金 力学性能 碳氧反应 氧含量 碳含量 

分 类 号：TG146.411[一般工业技术—材料科学与工程]