The φ20 mm hot-rolled GCr15 bearing steels were obtained through four kinds throughwater cooling processes. The effects of through-water cooling on microstructure and mechanical properties of the hot-rolled bearing steels and heat-treated bearing steels after spheroidizing annealing and quenching-tempering processes,respectively were investigated. The results showed that when the through-water cooling was carried out both before and after finish rolling and the finish-rolling and re-reddening temperature wa...