摘要
对奥氏体不锈钢低温压力容器常规设计与应变强化设计进行比较,可知应变强化技术可大幅提高奥氏体不锈钢材料的许用应力,减薄筒体壁厚,减轻容器重量。根据预应变拉伸试验确定国产S30408奥氏体不锈钢应变强化压力容器的应变上限值,并建立国产S30408奥氏体不锈钢材料的ASME和双线性这两种应力应变曲线,对两者进行比较后,以ASME应力应变曲线为计算依据,考虑抗拉强度的影响,确定了国产S30408奥氏体不锈钢材料制造应变强化低温容器时的许用应力及其对应的应变。
The conventional design and the strain hardening design of cryogenic vessels with austenitic stainless steel were compared. The allowable stress of austenitie stainless steel can be improved, the wall thickness and the weight of vessels can be reduced with the strain hardening technology. The stress - strain curve of bilinear model and ASME constitutive model of S30408 austenitic stainless steel were buil- ded and these two models were compared. The stress and strain were calculated base on the ASME stress -strain curve. Considering the influence of tensile strength, the reasonable strain hardening stress and strain of S30408 austenitic stainless steel were fixed.
出处
《压力容器》
北大核心
2011年第2期5-10,共6页
Pressure Vessel Technology
关键词
奥氏体不锈钢
应变强化
应力应变关系
许用应力
austenitic stainless steels
strain hardening
strain - stress relationship
allowable stress
