利索-全球专利检索

  1. 登录
  2. 注册
发明公开
CN103122436A 一种-70℃正火型低温压力容器用钢板 无效 - 撤回

一种-70℃正火型低温压力容器用钢板
摘要：
本发明涉及一种-70℃正火型低温压力容器钢板及其制造方法，钢板的化学成分按重量百分比为C：0.09～0.12%、Si：0.15～0.50%、Mn：1.2～1.6%、P：≤0.015%、S：≤0.005%、Nb:0.02～0.04%、Ni：0.40～0.80%、Ti:0.006～0.010%、Alt：0.020～0.034％，余量为Fe和不可避免的杂质。制造方法是：采用经过脱硫预处理的铁水和废钢作为原料，经过转炉冶炼、LF精炼、RH真空处理、连铸、加热、轧制和冷却、正火热处理等工序得到-70℃正火型低温压力容器钢板。其优点是：屈服强度大于380MPa，具有良好的塑性、优良的-70℃低温冲击韧性，可广泛用于制造液氯储罐、高压氮储罐、氨冷却器等低温压力容器设备。
摘要（英）：

The invention relates to a steel plate for a normalizing type low-temperature pressure vessel at-70 DEG C. The steel plate comprises the chemical ingredients by weight percent: 0.09-0.12% of C, 0.15-0.50% of Si, 1.2-1.6% of Mn, 0.015% or less of P, 0.005% or less of S, 0.02-0.04% of Nb, 0.40-0.80% of Ni, 0.006-0.010% of Ti, 0.020-0.034% of Alt and the balance of Fe and inevitable impurity. The preparation method comprises the steps of: by taking iron water and waste steel after desulphurization pretreatment as materials, carrying out converter smelting, LF refining, RH vacuum treatment, continuously casting, heating, rolling, cooling, normalizing heat treatment and the like to obtain steel plate for the normalizing low-temperature pressure vessel at -70 DEG C. The steel plate has the advantages that the yield strength is greater than 380MPa; and the steel plate has good plasticity and excellent low temperature impact toughness at -70 DEG C, and can be applied to fabrication of low-temperature pressure container equipments such as a liquid chlorine storage tank, a high-pressure nitrogen storage tank, and an ammonia cooler.

0/0