Cemented carbides processed from WC-Ni-Co-Cr₃C₂-TiAl₃ powder mixtures by HIP after sintering present a homogeneous precipitation of gamma prime in their metallic binder phases. Other reaction products include alumina precipitates and (Ti_x,W _1-x)C mixed carbides. The formation of these phases is consistent with the highly exothermic reactions detected by DSC during the heating ramp of the sintering cycle. The amount of alumina and gamma prime phases present in the sintered materials depends on the oxygen content of the powder mixtures. Refinement of gamma prime precipitates depends critically on the cooling rate after HIPing. Nanoindentation experiments have confirmed the presence of age hardening effects of samples which were previously solution treated. As expected, gamma prime precipitation is induced at lower temperatures in compositions with higher Al contents in the binder phase.

在烧结后，由HIP从WC-Ni-Co-Cr ₃ C ₂ -TiAl ₃粉末混合物中加工得到的硬质合金在其金属粘结相中均呈现出均匀的γ沉淀。其他反应产物包括氧化铝沉淀和（Ti _x，W _1-xC混合碳化物。这些相的形成与在烧结循环的加热斜坡期间DSC检测到的高放热反应一致。烧结材料中氧化铝和γ′相的含量取决于粉末混合物中的氧含量。γ初生沉淀物的提纯关键取决于HIP处理后的冷却速率。纳米压痕实验已经证实了先前经过固溶处理的样品具有时效硬化作用。如所期望的，在粘合剂相中具有较高Al含量的组合物在较低温度下诱发了γ′沉淀。