Abstract: A new type of roll material alloyed by reducing carbon and increasing silicon is investigated to resolve the problem of high carbon content. Brittle hardening layer of roll and low availability in 9Cr2MoV forging cold roll steel. The experimental results show that this new type of cold roll material is suitable for the poor working conditions and has excellent mechanical properties and longer life span.

Key words: Cold roll Harderhung layer, lloying by reducing carbon and increasing silicon, Retained austenite