2205DSS焊接接头腐蚀疲劳性能分析

基金项目: 重庆市科委重大科技攻关资助项目(ests2008ab3033)

Corrosion fatigue performance of 2205 DSS welded joints

1.
Marine Engineering Center, Chongqing Jiaotong University, Chongqing 400074, China
2.
Electromechanical and Automotive Engineering School, Chongqing Jiaotong University, Chongqing 400074, China

摘要: 对川东船厂制造化学品船所用的国产2205DSS常用焊接接头在模拟海水环境中的腐蚀疲劳性能进行了试验研究.通过Origin软件对试验数据进行非线性拟合得到了环境温度分别在24,30和40℃、加载应力比为0.1、加载频率为20 Hz条件下的腐蚀疲劳寿命S-N曲线,得到焊接接头在该环境下的疲劳极限,建立了有温度参数表示的S-N数学模型.结果表明,在模拟海水中焊接接头发生腐蚀疲劳断裂的位置在母材区,环境温度升高对低应力水平作用下的试件疲劳寿命有明显影响.
- 双相不锈钢 /
- 腐蚀疲劳 /
- S-N曲线
Abstract: The corrosion fatigue performance of welded joints of homemade 2205 duplex stainless steel (DSS) has been studied in simulated seawater environment. The S-N curves of corrosion fatigue life were obtained at different environment temperatures of 24,30 and 40℃,as the stress ratio is 0.1 and the loading frequency is 20 Hz. The experimental data shows that the low stress level had a significant effect on the fatigue life as environment temperature rising. Then an S-N mathematical model with temperature was established and welded joint fatigue limit was obtained in simulated seawater environment.
- 2205 duplex stainless steel /
- corrosion fatigue /
- S-N curve