高级检索
    郑振兴, 王世勇, 夏伟, 周照耀. 中密度钨-镍-铁粉末注射成形喂料的流变性能与流动本构模型[J]. 机械工程材料, 2008, 32(4): 24-28.
    引用本文: 郑振兴, 王世勇, 夏伟, 周照耀. 中密度钨-镍-铁粉末注射成形喂料的流变性能与流动本构模型[J]. 机械工程材料, 2008, 32(4): 24-28.
    shu
    ZHENG Zhen-xing, WANG Shi-yong, XIA Wei, ZHOU Zhao-yao. Rheological Property and Fluid Constitutive Relationship of Medium-density W-Ni-Fe Feedstock in Metal Injection Molding Process[J]. Materials and Mechanical Engineering, 2008, 32(4): 24-28.
    Citation: ZHENG Zhen-xing, WANG Shi-yong, XIA Wei, ZHOU Zhao-yao. Rheological Property and Fluid Constitutive Relationship of Medium-density W-Ni-Fe Feedstock in Metal Injection Molding Process[J]. Materials and Mechanical Engineering, 2008, 32(4): 24-28.
    shu

    中密度钨-镍-铁粉末注射成形喂料的流变性能与流动本构模型

    Rheological Property and Fluid Constitutive Relationship of Medium-density W-Ni-Fe Feedstock in Metal Injection Molding Process

      摘要
    • 摘要: 研究了中密度系列钨-镍-铁(烧结后密度分别为10,14,17 g·cm-3)粉末注射成形喂料的流变行为,分析了在相同粘结剂和粉末装载量的条件下,剪切速率、温度以及钨镍成分配比对喂料流变性能的影响.结果表明:钨-镍-铁喂料属于非牛顿型流体,遵从假塑性熔体的流动规律,具有较高的熔体粘度;其表观粘度随剪切速率的增大、温度的升高而减小;非牛顿指数随温度的升高而增大;钨在合金中所占比重越大,喂料对剪切速率的变化及温度的变化越敏感;利用非线性回归技术拟合流变参数,得到了喂料的流动本构模型.

       

      Abstract: Rheology properties of three kinds of W-Ni-Fe feedstock with different densities (10,14,17 g·cm-3 respectively after sintered) were studied to determine the effect of shear rate,temperature and tungsten-nickel ratio.Results suggest that W-Ni-Fe feedstock is a kind of pseudo-plastic fluid.The apparent viscosity of the W-Ni-Fe feedstock declined as shear rate increases or temperature rised.Non-Newtonian exponent increased as temperature rised.The tungsten-nickel feedstock became more sensitive to shear rate and temperature when the ratio of tungsten increased.In addition,fluid constitutive relationship of the feedstock was derived through the non-linear fit technology.

       

      • HTML全文
      • 参考文献(13)
      • 相关文章
      • 施引文献
    • 资源附件(0)

    /

    返回文章
    返回