| 摘要 |
PURPOSE:To produce the title high-strength ultrathin stainless steel sheet for slicer material with low in-plane anisotropy in tensile strength by cold-rolling the hot-rolled and annealed sheet having a specified composition, heating under specified conditions, hardening, and then continuously annealing the sheet. CONSTITUTION:The hot-rolled and annealed stainless steel sheet contg., by weight, 0.20-0.50% C, <=1% Si, <=2% Mn, <=0.3% Ni, 10.5-15% Cr, the balance Fe, and inevitable impurities is cold-rolled, and the cold rolling including process annealing is repeated more than once to <=0.3mm sheet thickness. The cold- rolled sheet is heated, and then hardened from 1040-1100 deg.C. The sheet is then continuously annealed at 250-400 deg.C for 10sec to 10min. As a result, an ultrathin martensitic stainless steel sheet for a wafer slicer having >=170kgf/mm<2> tensile strength, >=6% elongation, and <=5kgf/mm<2> in plane anisotropy in tensile strength is obtained. An ultrathin blade can be easily produced from this material. |
