采用断口的萃取碳复型等实验技术,发现NiCrWTi铸造高温合金在1030℃就存在着MC向M_(23)C_6的退化反应,而在1180℃出现M_(23)C_6向MC的逆反应。晶界的这种可逆反应十分明显。
The degeneration reaction from MC to M_(23)C_6 at 1030℃ and the reverse reaction from M_(23) C_6 to MC at 1180℃ in a NiCrWTi cast supcralloy have been investigated by the fractographic extraction replica technique. The reversible reaction appeared on grain boundary surface quite markedly.
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