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研究了一种Fe-W(Mo)-Co(Ni)时效工具合金中的相、组织及其在热处理时的变化。得出,合金可采用两种固溶处理,一种是从γ相和金属间化合物双相区淬火;另一种是从δ单相区淬火,获得高过饱和度的δ铁素体。这两种固溶方法都具有很高的时效硬化能力。合金双相区淬火后时效初期发生调幅分解,沿(110)_(?)面形成片状的W、Mo 原子的贫区与富区,产生第一步硬化。三角晶系的μ相从富W,Mo 区中析出,与基体保持共格,由此产生第二步硬化。
The phase and microstructure of a Fe-W (Mo) -Co (Ni) aging tool alloy were studied during the heat treatment. It can be concluded that the alloy can be treated by two kinds of solution treatment, one is quenching from the dual-phase zone of γ phase and intermetallic compounds and the other is quenching from δ single-phase zone to obtain δ-ferrite with high supersaturation. Both of these solution methods have very high age hardening capabilities. After quenching, the as-deformable decomposition of the alloy dual-phase zone is followed by the formation of flaky W and Mo depleted and rich zones along the (110) _ (?) Plane, resulting in the first-stage hardening. The triangular phase of the μ phase from the W, Mo region precipitation, and the matrix remain coherent, resulting in the second step of hardening.