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一、前言我厂生产的转向器的转向螺杆材质为20CrMnTi,转向轴是45号钢。这两种材质可焊性较差,采用手工电弧焊焊接难度很大,易产生气孔、夹渣及裂纹等缺陷。由于转向器杆是关键的安全件,因此对焊工技术水平要求较高,对焊条烘干、焊后保温缓冷等工艺措施要求很严,这样就增加了焊前焊后的辅助时间,焊接质量难于保证,生产效率也低。从生产发展来看,
First, the preface I produced the steering gear steering screw material 20CrMnTi, steering shaft is 45 steel. These two materials are poor solderability, the use of manual arc welding is very difficult, easy to produce porosity, slag and crack defects. As the steering rod is the key safety parts, so the requirements of the technical level of the welder, the electrode drying, post-weld insulation slow cooling and other process measures are very strict, so that an increase of welding auxiliary time after welding, welding quality Difficult to guarantee, low productivity. From the point of view of production and development,