Service life of guide wheel is one of key factors to influence the size precision of rolled products. With practice of φ70 mm 20CrMnTiH gear steel product by 550 mill
according to test of properties of 4 steel grade- T8
Crl6Ni3
Crl2MoV and Cr23Ni5Mo for guide wheel and effect of different heat treatment processes on service life of 670 mm guide wheel
the steel Crl2MoV (/%: 1. 45 - 1. 55C
≤0.60Si
≤ 0.60Mn
12. 00 ~ 13.00Cr
0. 90 ~ 1.10Mo
0.90 ~ 1.10V) with fining carbide heat treatment and final cold treatment is selected as guide wheel material
the service life of guide wheel made of steel Crl2MoV is up to 2 000 t
it is available to ensure size precision and decrease reject.