确定了合金中的淬火相组成为初生α相,亚稳定β相和斜马氏体α″及六方马氏体α′相。α″马氏体出现于α+β相区淬火合金中,形状为细针状,α′马氏体主要存在于β相区淬火合金中,主要是片状,α′相有平行排列和竹叶状两种形态的孪晶。合金在时效过程中,α″,α′和β三种亚稳定相均分解生成α+β混合物相。时效初期,a″马氏体先转变成α′马氏体,再分解生成α+β混合物相。 The composition of the quenched phase in the alloy was identified as primary α phase, metastable β phase and oblique martensite α “and hexagonal martensite α ’phase.” Α “martensite appeared in the α + β phase quenched alloy, For the fine needle, α ’martensite mainly exists in the β-phase quenched alloy, mainly flaky, α’ phase with parallel arrangement and bamboo twins two forms of twins. In the aging process, the α, α and β metastable phases all decompose to form α + β mixture phase. At the beginning of aging, a ”martensite first transformed into α ’martensite and then decomposed to form α + β Mixture phase.