摘要
采用自蔓延熔铸法制备出CuCr合金.分别考察了反应物配比对合金成分、添加剂CaF2对合金试样宏观形态、不同铸模对合金试样微观结构以及铸模预热温度对合金试样的影响.实验结果表明:反应物的理想配比为w(CuO):w(Cr2O3):w(Al)=100∶140∶160;添加剂CaF2降低了渣的熔点并强化了渣金分离效果;金属铸模中合金冷却速度比较大,所得合金试样的结晶晶粒较细;采用石墨铸模浇注时,提高铸模的预热温度可改善合金的质量,当预热温度为500℃时,可以得到致密的CuCr合金.
CuCr alloy was prepared by self-propagating high-temperature synthesis（SHS） melting. How the proportioning of reactants, additive CaF2, different molds and mold pre-heating temperature affect the alloy composition, macromorphology and microstructure of the alloy specimens were investigated, respectively. Experimental results indicated that the reasonable proportioning of the reactants is 100：140：160 of w（CuO）：w（Cr2O3）：w（Al）; the additive CaF2 can not only lower the melting point of slag but improve the efficiency of separating metal from slag; the high ecoling rate of the alloy in metal mold makes its crystal grains liner; and when casting in the graphite mold, the quality of the alloy can be improved if the pre-heating temperature is rising, e.g., the compact CuCr alloy is available at a preheating temperature 500 ℃.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第2期209-212,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(50374026)
关键词
触头材料
CUCR合金
自蔓延熔铸
能谱分析
扫描电镜分析
contact material
CuCr alloy
self-propagating high temperature synthesis（SHS） melting
XPS
SEM
