摘要
利用应变强化技术能够提高奥氏体不锈钢的屈服强度,减薄容器壁厚,减轻设备重量。在安全的前提下实现深冷容器的轻量化,对于节能降耗具有重要社会意义。在深冷容器的强化工艺中,在内压达到强化荷载后,需对容器进行一段时间的保载,通常,应变强化操作中应变强化压力Pk保持为（1.5~1.6）Pc（计算压力）,如果在起初的0.5~1 h内实施强化压力增加5%的超载保载,应变加剧,整体的保载时间将会缩短。根据不同应变保载模式下生产的深冷储罐,探讨不同应变速率的影响以及其制造过程监督检验的关注重点。
Yield strength of austenitic stainless steel can be enhanced and the wall thickness and the weight of the equipment can be reduced by using the cold stretching technique. On the premise of safety,realizing light-weight of cryogenic vessels has significance to energy conservation and emission reduction.In the process of cold stretching technique for cryogenic vessels the internal pressure needs to be maintained at a certain value for a period of time. Cold-stretching pressure P_kshall be between 1. 5 and 1. 6times Pc（ calculating pressure） in a typical cold-stretching operation. If a 5% higher cold-stretching pressure is applied during the first 30 min to 1 h,the amount of time the vessel is subjected to Pkmay be reduced to accelerate stain formation. This paper will be based on cryogenic vessels production under different cold-stretching pressure holding mode to explore the effects of strain rate. Some suggestions about supervision and inspection during the manufacturing process are also provided.
出处
《压力容器》
2016年第7期1-5,共5页
Pressure Vessel Technology
关键词
应变强化技术
保载模式
奥氏体不锈钢
应变速率
cold stretching technique
holding mode
austenitic stainless steel
strain rate
