The effects of deformation amount, deformation temperature and subsequent holding time on the deformation spheroidising process of high-carbon-bearing steel containing aluminium were investigated. The effects of aluminium contents on the mechanism of spheroidisation were also investigated. Results show that the deformation spheroidising process can shorten the spheroidisation cycles. High deformation temperature and deformation amount induce the coarsening of carbides. However, at low deformation temperature, deformation amount slightly affects the diameters and roundness of carbides. The carbides exhibit a uniform diameter distribution after prolonging the holding time at 650°C to 45 min after deformation. When aluminium content is less than 0.75%, the addition of aluminium inhibits the growth of carbides and improves their roundness.
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