Seamless corrosion resistant steel bottle production used for storing high purity or corrosive gas or liquid

摘要

Producing seamless corrosion resistant steel gas bottles, for use in contact with high purity and/or corrosive gases and/or liquids, involves the composition (by wt.) 0.02-0.06% C, 0.15-0.30% Si, 1.60-1.80% Mn, /}0.035% P, /}0.008% S, /}0.020% Al, 12.5-13.5% Cr, 0.3-0.8% Ni, /}0.07% V, 0.025-0.060% Nb, >= 0.03% W, /}0.01% Ti, 0.010-0.035% N, balance Fe and impurities, where the sum of C + N is /}0.07% and the sum of V + Ti is /}0.07%. A first process involves (a) hot extruding a bottle preform from a steel ingot; (b) soft annealing the preform at 650-750 deg C; (c) cold extruding at room temperature to the desired final wall thickness; (d) roll forming a bottle neck at 1150-1250 deg C; (e) hardening and tempering; and (f) descaling the steel bottle interior and exterior. Also claimed is are (I) second process involves (a') deep drawing a soft annealed blank of hot rolled steel sheet to form a bottle sleeve; and (b') carrying out the above steps (d), (e) and (f), and (II) third process involves (a") subjecting a seamless steel tube to end spinning or forging to form the bottom or bottle neck; and (b") carrying out the above steps (e) and (f).