U形およびH形異形線のサテライトミル圧延における圧延条件の影響

抄録

The authors developed a compact continuous mill named satellite mill. In the satellite-mill rolling, longitudinal compressive stress decreases the elongation significantly and promotes transverse metal flow, so that this mill can produce more complex profiled wires efficiently than conventional mill. In this study, the influence of pass schedules is studied in rolling of U-shaped and H-shaped wires.In addition, the effect of roll surface roughness is studied, with two central rolls, which have different roughness on the groove. The obtained main results are as follows,
1) In U-shaped wire rolling, the elongation decreases with increase in the reduction at the first stage. In H-shaped wire, the influence of pass schedule on elongation is not obvious.
2) The rolling characteristics are sensitive to the surface roughness of the groove. Smooth surface finish of the groove increases the elongation and decreases the rolling force considerably.
3) The hardness in cross section of products with smoother roll is lower and more uniform than that with rougher roll.