硬质合金氢气烧结的变形机理及其控制

分析了硬质合金在氢气烧结中产生变形的原因 ,这些原因包括压坯密度不均匀、炉内碳气氛不均匀、炉内温度分布不均匀、压坯的外形特征以及不恰当的装舟方式。采用一些特殊的方法可以控制这些因素的影响 ,甚至利用这些因素来相互制衡 ,从而减小或避免压坯在烧结中的变形。

THE CAUSE AND CONTROL OF DEFORMATION OF CEMENTED CARBIDE IN HYDROGEN SINTERING

This paper introduces the causes of deformation of cemented carbides in hydrogen sintering. These causes includ nonuniform green density,nonuniform distribution of temperature and nonuniform carbon atmosphere in the furnace,green's formation and unreasonable loading boat. We take measures to control the influence of these factors and use them to mak up each ofher so as to reduce and avoid the deformation of sintering product.