work roll

Rolling mill roll is the important parts, use a pair or a group of pressure roller to roll grinding steel rolling. It mainly under static loading of rolling, wear and temperature changes. Heat and cold rolling two kinds. Common cold roll of work roll materials have 9Cr, 9Cr2, 9Crv 8CrMoV, etc, the cold roll surface hardening, hardness requirement for HS45-105. Hot roller materials are used 55Mn2 55Cr, 60CrMnMo, 60SiMnMo, etc, hot roller, use in plate and steel country.three etc. It is under the powerful rolling force, severe wear and thermal fatigue and hot rolls temperature, and in the work within the workload units allowed in diameter, so don't wear surface hardness requirement only request with high strength and toughness and heat resistance. Hot roller is used only quenching, surface hardness requirement or HB190 270. The hardness on roll Roll hardness is an indirect physics values, it is the height of the internal organization roll itself, such as roller materials, roll material base hardness of carbide type and quantity of the residual stress of roller, etc. At the same time, because of XiaoShiHe roll hardness testing for measuring hardness testing, hardness testing rebound type testing instruments, operator of psychological factors and other factors. So whether roll manufacture and use of department, responsible for the special needs and hardness of hardness tester, attention to the selection of other hardness, meanwhile compared to stable relationships often censorship and proofreading must pay attention to the hardness testing instrument and standard test, the enterprise can promote condition to use standard roll proofreading hardness tester.