电站锅炉集箱管座角焊缝缺陷安全性分析方法

基金项目: 浙江省质量技术监督系统科研项目(20110106);质检公益性行业科研专项(201210019)

Study on security analysis method for tube filled weld on power boiler set box

Zhejiang Provincial Special Equipment Inspection and Research Institute, Hangzhou 310020, China

摘要: 电站锅炉集箱管座角焊缝位置经常发现裂纹缺陷,部分接管甚至出现泄漏.为避免类似问题的出现,在对该部位角焊缝进行现场勘测及关键部位应力测试的基础上,对管座角焊缝的焊接结构进行了数值计算.探讨了其裂纹产生的原因,分析了内部未焊透缺陷对角焊缝结构安全性的影响.结果表明,所提出的角焊缝缺陷安全性分析方法是可行的及正确的,为电厂焊接结构的安全检修提供了科学的依据.
- 电站锅炉 /
- 角焊缝 /
- 应力测试 /
- 安全性分析 /
- 数值计算
Abstract: Tensile properties and fracture mechanism of Sn3.0Ag0.5Cu/Cu solder joints aged at 150℃ for different time were investigated at the strain rates of 2×10^-4,2 × 10^-2 and 2s^-1.Experimental results show that the strain rate plays a significant role in the strength and the fracture behavior of the solder joints.The tensile strength of the solder joints increases with increasing of strain rate.The solder joints fail in a ductile mode within the solder at the low strain rate,but fail in a brittle mode inside the IMC layer at the high strain rate.
- power boiler /
- fillet weld /
- stress test /
- defects assessment /
- numerical simulation