脱氧工艺对钼铌粉末中氧质量分数的影响  

Effect of deoxidation processes on mass fraction of oxygen in Mo-Nb powders

作　　者：刘东新[1] 刘仁智[1] 安耿[1] 朱琦[1] 席莎[1] 党晓明[1] 王娜[1] 吴吉娜 周莎 LIU Dong-xin;LIU Ren-zhi;AN Geng;ZHU Qi;XI Sha;DANG Xiao-ming;WANG Na;WUJi-na;ZHOU Sha(Jinduicheng Molybdenum Co.,Ltd.,Xi'an 710075,China)

机构地区：[1]金堆城钼业股份有限公司,西安710075

出　　处：《粉末冶金技术》2020年第6期449-454,共6页Powder Metallurgy Technology

基　　金：国家重点研发计划重点专项资助项目(2017YFB0306003);陕西省重点研发计划资助项目(2018ZDXM-GY-120)。

摘　　要：为了研究脱氧工艺对钼铌粉末中氧含量(质量分数)的影响,将经48、72、96、120h球磨处理的钼铌粉末压制为直径17 mm的圆棒,并进行低、中温氢气脱氧,中、高温真空脱氧及高温氢气脱氧处理,分析脱氧处理后钼铌圆棒的氧含量、微观形貌及烧结密度。结果表明:球磨不会明显增加钼铌粉末中的游离氧的含量,更不会增加氢含量;低、中温氢气脱氧处理后,钼铌圆棒试样中的氧含量整体明显升高;中温真空脱氧处理后,钼铌圆棒试样中氧含量有所降低,高温真空脱氧后效果进一步加强,且随着脱氧的进行,钼铌圆棒试样烧结密度显著提高,表明高温真空能实现脱氧;高温氢气脱氧后,钼铌合金的氧质量分数接近0.11%。To investigate the effect of the deoxidation processes on the oxygen mass fraction in the molybdenum and niobium powders,the molybdenum and niobium powders were pressed into the round rod specimens with a diameter of 17 mm after ball-milling for 48,72,96,and 12 h.The Mo-Nb round rod specimens were treated by the hydrogen deoxidation at low and medium temperatures,the vacuum deoxidation at medium and high temperatures,and the hydrogen deoxidation at high temperatures,respectively,to analyze the oxygen mass fraction,microstructure,and sintered density of Mo-Nb specimens after deoxidation.In the results,the mass fractions of oxygen and hydrogen are not significantly increased by ball milling.After the hydrogen deoxidation at low and medium temperatures,the oxygen content by mass of Mo-Nb round rod specimens shows an increase obviously.After the vacuum deoxidation at medium temperature,the oxygen content by mass of Mo-Nb specimens decreases,the effect of vacuum deoxidization at high temperature is further enhanced,and the sintered density of Mo-Nb specimens increases significantly after the vacuum deoxidization,indicating that the deoxidization can be achieved by high temperature vacuum.The oxygen mass fraction of Mo-Nb specimen is close to 0.11%after the hydrogen deoxidization at high temperature.

关 键 词：钼铌粉末 脱氧 质量分数 微观形貌 烧结密度 

分 类 号：TG146.4[一般工业技术—材料科学与工程]