Abstract:
Elaborated in the paper are several major types of metal as currently used for making rolls of domestic HFW pipe production lines,including Cr12MoV,9Cr2Mo,86CrMoV7,and 4Cr5MoSiV1. And a comparison among such types of material are conducted in terms of technological performance and cost effectiveness,while damage of the roll as caused during operation and its maintenance are investigated based on the actual operation status and maintenance follow-up result of the roll. As a result,several damage types of the roll as commonly encountered with are identified,and accordingly,countermeasures are proposed to enhance the service span of the roll,which can be used by relevant steel pipe-making companies and roll manufacturers for reference in case of roll material selection.