摘要
以非标准持久试样进行了316L不锈钢扩散焊接头蠕变与持久试验。采用θ函数法描述和预测了316L不锈钢扩散焊接头蠕变曲线,并由θ函数法计算了最小蠕变应变速率和接头在6MPa,550℃条件下蠕变应变达到0.2%时的使用寿命,并将蠕变应变0.2%作为以316L不锈钢为母材的扩散焊构件高温结构设计标准。由持久试验结果可知,θ函数法与Larson-Miller法外推的316L不锈钢直接扩散焊接头蠕变断裂时间较为一致。
The non-standard specimen is used in the creep and stress rupture test of the 316L stainless steel direct diffusion bonding joint.The creep curve is interpreted in terms of the θ project concept method,the minimum creep strain rate,creep curve and remain life at 6 MPa are calculated by using θ project method,the creep strain of 0.2% is select as the design criterion for the diffusion bonding component at high temperature.As known form the stress rupture experimental results,the remaining life extrapolated by Larsen-Miller equation is relatively consistent with that calculated by the θ project concept method.
出处
《压力容器》
北大核心
2011年第7期6-10,共5页
Pressure Vessel Technology
基金
上海应用技术学院校内基金项目:扩散焊接头尺寸效应研究(1020K095003)
关键词
扩散焊
蠕变变形
持久强度
θ函数法
diffusion bonding
creep deformation
rupture strength
the θ-project concept
