The effects of alloy composition and the temperature range of cooling regime on microstructure and magnetic properties of melt-spun Sm(Co 0.74 Fe 0.1 Cu 0.12 Zr 0.04 ) 7.5 (Cu/Zr-rich) and Sm(Co 0.75 Fe 0.15 Cu 0.08 Zr 0.02 ) 7.6 (Cu/Zr-poor) magnets were investigated. A very high coercivity of 2.8 T was obtained by applying a simple aging procedure to the as-spun Sm(Co 0.74 Fe 0.1 Cu 0.12 Zr 0.04 ) 7.5 ribbons, which is much higher than that of Sm(Co 0.75 Fe 0.15 Cu 0.08 Zr 0.02 ) 7.6 one. Transmission electron microscopy (TEM) shows that an uniform cellular and lamellar structure was observed in the annealed Sm(Co 0.74 Fe 0.1 Cu 0.12 Zr 0.04 ) 7.5 ribbons, which results from the single-phase TbCu 7 type matrix in the as-spun ribbons, in contrast to a mixture of 2:17 and 1:7-type Sm-Co phases in the as-spun Sm(Co 0.75 Fe 0.15 Cu 0.08 Zr 0.02 ) 7.6 ribbons. High temperature measurements revealed that the temperature stability of the coercivity of Sm(Co 0.74 Fe 0.1 Cu 0.12 Zr 0.04 ) 7.5 ribbons is very sensitive to the temperature range of the cooling regime and the lower the quenching temperature, the more negative the temperature coefficient. A coercivity of 0.53 T at 500 • C was obtained in the sample quenched at 600 • C. Ribbons prepared by this simple processing route based on melt-spinning, in contrast to the conventional time consuming and intricate aging program, have a strong potential for a more economic preparation of bonded magnets in the future.