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Hot compression experiments were conducted on a Cu–Ag–Zr alloy with low Ag content, Cu–3Ag–0.6Zr, to investigate the effect of precipitation on the mechanical response of this alloy. The results show that the stress-strain behavior of Cu–3Ag–0.6Zr alloy is significantly affected by the precipitation. The flow stress of the alloy deformed at temperatures of 623–673 K and a strain rate of 10−3 s−1 increases due to the occurrence of the continuous and discontinuous precipitation. However, the precipitation process is suppressed with increasing strain rate, resulting in almost identical flow stress of the alloy deformed at different temperatures.

Hot compression tests of the Cu–3Ag–0.6Zr (wt.%) alloy were carried out on a Gleeble-3800 testing machine at various strain rates and at different deformation temperatures. The stress–strain behavior of the alloy during the deformation process are analyzed. The results show that the hot deformation behavior of the Cu–3Ag–0.6Zr alloy is markedly affected by the interaction between the work hardening and the dynamic recrystallization at different strain rates and temperatures. The thermal deformation activation energy is calculated as 248.8384 kJ mol−1 and the hot compression constitutive equation has been established. The processing map of the alloy has also been established. According to the obtained processing map, the preferable domains for hot working are identified at a strain rate of 10-3 s-1 and at 900–940 K or temperatures higher than 1023 K.

In pipe neck-spinning process, the feed speed has great significant on pipe deformation and smoothly proceeding of spinning. In this paper, the nonlinear finite element software SuperForm is used to simulate the deformation in pipe multi-pass neck-spinning process, the stress distribution inside and outside of the pipe deformation zone, as well as the stress on spinning roller. The results show that, after nine times neck-spinning, the maximum deformation locates in the pipe mouth, and the stress on the outside of the pipe is larger than the inside. With the increasing feeding rate, the thickness of pipe necking deformation zone decreases, while the pipe length is shortened to 4.66mm. The stress in X direction on spinning roller increases with the prolonging of time in the medium term of spinning, but that in Y direction did not changes significantly.