摘要
某钛合金筒体与封头连接采用电子束焊接,其焊缝可检区域狭窄,射线检测时焊缝两侧结构极易产生遮挡导致焊缝投影不全。采用源在外的单壁单影垂直透照检测方法,通过严格控制射线机与工件的相对几何位置,结合胶片斜贴的方法,解决了焊缝投影成像不全的难题。在检测质量控制方面,通过采用适当提高管电压、控制曝光量以提高底片黑度值的方法,降低射线散射对成像质量的不利影响,实现了0.8%的相对灵敏度及不小于Φ0.3 mm的缺陷识别能力,保障了产品生产的顺利实施。
A titanium alloy shell connected to the head was achieved by electron beam welding,because the detectable area of the weld was very narrow,the structure on the both sides of weld would affect the X-ray imaging.When the X-ray source was on the outside of the sample,through the X-ray single-wall single-shadow transillumination detecting method,the problem that the ray projection was not complete could be solved by controlling the geometric position between the X-ray machine and the sample and by slanting the film.In order to control the detection quality,the tube voltage needed to be increased properly and the negative blackness values also needed to be increased by controlling the quantity of illumination,then the adverse impact of X-ray scatting to the imaging quality would decrease.In the results,the relative sensitivity could reach 0.8%,and the defect recognition capacity could reach Φ0.3 mm,this guaranteed the smooth implementation of production.
出处
《焊接技术》
2017年第5期124-127,共4页
Welding Technology
关键词
电子束焊接
射线检测
质量
灵敏度
electron beam welding
radiographic testing
quality
sensitivity
