不锈钢管-管对接电子束焊接工艺

Electron Beam Welding Technology for Butt Weld in Stainless Steel Tubes

针对稳压器的电加热元件00Cr17Ni14Mo2不锈钢管(Φ22mm×2.5mm)的I型坡口对接结构,采用上聚焦方式的电子束焊接工艺,解决了焊缝内凸和表面塌陷的成型问题,实现了该结构的单面焊双面成型焊接。试件按法国RCC-M规范进行外观尺寸检测、液体渗透检测、X射线检测、拉伸试验、弯曲试验、金相检测、铁素体含量测定及晶间腐蚀试验,未见任何缺陷,各项性能均满足技术条件要求。

This paper presents an EBW （Electron Beam Welding） technology for butt weld in stainless steel （00Cr17Ni14Mo2） tubes used in an electro-thermal component, which size is φ22mm×2.5mm. By carrying out the EBW technology with a low current and a near-focusing manner, the inner convex of the weld is accurately controlled, the problem of external collapse is solved, and the One Side Welding Both Sides Formation technology is implemented. The specimen has passed all the tests required in Code RCC-M, including visual examination, liquid penetrate examination, X-ray inspection, tensile test, bending test, metallography detection, ferrite determination, and inter-granular corrosion test. Each quality above has reached the technological index grade I.