【摘要】 <正> μ相是高温合金中常见的TCP相之一,室温下的显微硬度很高,是一种脆性相。为了弄清μ相析出量与时效温度,时效时间及与室温拉伸塑性的关系,要求对μ相进行定量相分析。我们实验出一种较理想的定量μ相的方法,现介绍如下: 一、实验方法 1.μ相和MC相合量的测定 GH150合金的化学成分(％)为:Ni(50)、Fe(30)、Cr(15)、Mo(5)、W(3)、Ti(2)、Al(1)、Nb(1)、C更多还原

【Abstract】 A quantitative method for u phase has been developed, in which the u phase and the alloy matrix are simultaneously over-passivated and dissolved in a total qu- antity type electrolyte(ammonium sulfate-citric acid-water), and γ’ and MC phases are extracted; then the γ’ phase is dissolved in an acid solution, and the quantity of MC phase in the residue is subsequently determined. The μ and MC phases are further extracted, and then the sum of both phases is derived. The quantity of μ phase is finally obtained by the difference between the sum and the quantity of MC phase.更多还原