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对Ti-4Al-4.5Mo合金经不同固溶温度淬火处理后的相组成进行了分析.结果表明,当合金在相变点以上温度淬火后,可以获得hcp结构α′马氏体;随固溶温度降低,淬火后斜方α″马氏体出现,并在一定的温度范围内与α′马氏体共存;在800℃淬火,α″马氏体消失,合金由α和β相构成;α″马氏体显著降低β转变组织的硬度.EDS分析表明,Mo含量并不是决定马氏体类型的唯一因素.
The phase composition of Ti-4Al-4.5Mo alloy quenched by different solution temperature was analyzed.The results show that when the alloy is quenched at above the transformation temperature, α’-martensite with hcp structure can be obtained, Α “martensite appeared after quenching, and coexisted with α ’martensite in a certain temperature range; quenched at 800 ℃, the α” martensite disappeared and the alloy consisted of α and β phases; α "Martensite significantly reduces the hardness of β-transformed tissue, and EDS analysis shows that Mo content is not the only factor that determines the type of martensite.