顺序增压切换阀在工作过程中需要承受高温和较高的压力，这会导致切换阀产生蠕变现象。在获取阀门材料310S不锈钢高温蠕变试验数据的基础上，获得了蠕变数学模型参数，建立了材料的Norton蠕变数学模型。采用ANSYS有限元仿真软件模拟分析了顺序增压切换阀18 000 h工况下的应力场、单轴蠕变应变规律；基于Cocks-Ashby多轴蠕变系数，仿真得到了阀门多轴蠕变应变分布规律。仿真结果表明：阀门蠕变较大部位平均蠕变应变为8%；在引入多轴蠕变系数后，阀门关键节点的多轴蠕变应变除少数结构突变点外均低于2%。

The sequential turbocharging switch valve needs to withstand high temperature and high pressure during the working process, which results in the creep phenomenon of switch valve. Based on the high temperature creep test data of 310S stainless steel, the creep mathematical model parameters were obtained, and the Norton creep mathematical model of material was established. The ANSYS finite element simulation software was used to simulate and analyze the stress field and uniaxial creep strain law of the sequential turbocharging switch valve under 18 000 h working condition; Based on Cocks-Ashby multiaxial creep coefficients, the multiaxial creep strain distribution law of valve was obtained by simulation analysis. The simulation results show that the average creep rate of valve with a large creep is 8%. After introducing the multiaxial creep coefficient, the multiaxial creep strain for the key nodes of valve is less than 2% except for a few structural sudden changes.