METHOD FOR EVALUATING SLAGGING PROPERTY AND MELTING PROPERTY OF MOLD POWDER

摘要

PROBLEM TO BE SOLVED: To evaluate slagging property and melting property of the base powder of a mold powder when sieving the mold powder with each of sieves, which has an opening (a) and an opening (b) respectively.;SOLUTION: The mold powder is sieved with each of sieves, which has an opening (a) and an opening (b) respectively, and the plus-sieves of the mold powder are designated respectively as slagging rates (%), R_{SL, a} and R_{SL, b}. The difference between R_{SL, a} and R_{SL, b} is represented by ΔR_SL, and the slagging property and the melting property of the base powder of the mold powder is evaluated from ΔR_SL and R_{SL, a}. In this case, R_{SL, a}, R_{SL, b}, and ΔR_SL are expressed respectively by expressions: (1) R_{SL, a}=100(m_β+m_γ)/(m_α+m_β+m_γ); (2) R_{SL, b}=100m_γ/(m_α+m_β+m_γ); and (3) ΔR_SL=R_{SL, a}-R_{SL, b}=100mγ/(m_α+m_β+m_γ), wherein, the distribution ranges of the particle diameters of the mold powder are represented by α in which the particle diameters are less than (a), β in which the particle diameters are (a) or more and (b) or less, and γ in which the particle diameters are more than (b).;COPYRIGHT: (C)2010,JPO&INPIT