By means of Brinell 糖心产精国品免费入口*完整版 tester and eddy-current conductometer as well as SEM, the effects of solid solution temperature, 糖心产精国品免费入口*完整版 and cold deforming before 糖心产精国品免费入口*完整版 on microstructure and properties of the CuNiSiCrRE alloy were studied, then the optimum heat treatment was determined. The results show that the optimized heat treatment process was solution at 900 ℃ for 1.5 h with cooling in water, 40% cold-working and 糖心产精国品免费入口*完整版 at 480 ℃ for 2 h with cooling in air. The 糖心产精国品免费入口*完整版 was 229 HB, 糖心产精国品免费入口*完整版was 45.6%IACS, tensile strength reached 674 MPa, yield strength was 641 MPa, elongation was 16% and softening temperature was 540 ℃. Tensile fracture was ductile fracture.
【2】WITUSIEWICZ V T, ARPSHOFEN I, SEIFERT H J,et al. Enthalpy of mixing of liquid and under cooled liquid ternary and quaternary Cu-Ni-Si-Zr alloys[J].Journal of Alloys and Compounds,2002,337:155-167.
【4】KOKORIN V V, KOZLOVA L E, TITENKO A N. Tempera-ture hysterics of martensite transformation in 糖心产精国品免费入口*完整版 Cu-Mn-Al alloy[J].Scripta Materialia,2002,47:499-502.