METHOD FOR SPUTTERING ALUMINUM GASOTHERMIC COATING ONTO BLANKS IN ORDER TO HEAT THEM FOR ROLLING

摘要

FIELD: metallurgy, possibly heating of continuously cast slabs of low alloy steel for further rolling of them.;SUBSTANCE: method for sputtering aluminum gasothermic coating onto rectangular steel slabs to be heated for rolling comprises steps of sputtering coating onto upper wide face by thickness determined according to relation: 0.3 ≤(H_uc - 0.1)/ √ 10 ^-3 H _s≤ 0.4 where H _uc -thickness of coating applied onto upper wide face of slab, mm; H _s - thickness of slab, mm. Coating applied onto lower wide face of slab has thickness determined according to relation: 0.6 ≤√ H_s /R x H _lc /H _uc ≤ 0.8 where H _lc - thickness of coating applied onto lower wide face of slab, mm; R - radius of rollers of transporting roller table, mm.;EFFECT: lowered thickness of defect layer on wide faces of slab, especially on its lower face due to selection of optimal values of thickness of gasothermic sputtering on slab.;2 tbl, 4 ex