| 摘要 |
PURPOSE:To manufacture stably and surely a pipe superior in anisotropy and mechanical property of material characteristic, by performing finishing cold roll working and annealing under specified conditions, at manufacturing nuclear fuel cladding tube composed of Zr base alloy having a specified component compsn. CONSTITUTION:In manufacturing the titled tube composed of, by weight ratio 1.20-1.70% Sn, 0.18-0.24% Fe, 0.07-0.13% Cr, under [Fe(%)+Cr(%)]=0.28-0.37, and the balance Zr with inevitable impurities, finishing cold roll working is carried out under 1.5-3.5 working parameter [QE value], (3.3+0.16.ln QE)/4.8X100-90% working degree Rd. QE value is exhibited by a formula, Dm is average tube diameter before rolling, (dm) is said diameter after rolling, T is tube wall thickness before rolling, (t) is said thickness after rolling. Successive annealing is performed as stress removal annealing at 430-500 deg.C.
|
