| 摘要 |
PURPOSE:To manufacture a load cell with superior strength and shock resistance by coating a strain producing body made of a rolled cast steel with a cast steel of the same kind by casting and by heat treating the coated strain producing body. CONSTITUTION:The composition of a cast steel is composed of, by weight 0.02- 0.1% C, 0.4-2% Si, 0.2-1.5% Mn, 4.5-8.5% Ni, 8.5-10.5% Cr, 1-3% Mo, 1- 3% Cu, 0.2-0.5% Nb and the balance Fe with inevitable impurities. The cast steel is rolled to form a strain producing body, and this strain producing body is coated with a cast steel having said composition by casting to form an outer frame bonded to the strain producing body. The coated strain producing body is subjected to soln. heat treatment at 900-1,100 deg.C, subzero treatment at -150- -250 deg.C, and again at 400-550 deg.C aging treatment. |
