研究了熔体过热处理对M963铸造镍基高温合金凝固偏析的影响.结果表明,熔体过热处理对Al,Co和Ni的偏析影响不大;1 923 K,5 min熔体过热处理,使Ti,Nb和W的偏析增大,Mo和Cr的偏析减小.元素偏析程度的改变是由于合金熔体结构的变化引起的.
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