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去年我厂为外单位轧球机加工了两根超长连接轴,此轴是由两个扁头和一个连杆焊接而成的(见图)。轴长3370毫米,重865公斤,材质为45钢。45钢属于中碳钢,可焊性较差,要求焊后整体退火,而我厂又无这样大的热处理设备。为此,我们在焊前制定了严格的工艺措施,并改进了焊后热处理工艺,使连接轴的焊接质量完全符合技术要求。现介绍
Last year, our factory processed two extra-long connecting shafts for ball rolling machines outside the unit. The shaft is made by welding two flat heads and a connecting rod (see figure). Shaft length 3370 mm, weight 865 kg, made of 45 steel. 45 steel is medium carbon steel, poor weldability, the overall post-weld annealing, and I have no such large plant heat treatment equipment. To this end, we have developed a rigorous process before welding, and improved after-heat treatment process, so that the welding quality of the shaft fully meet the technical requirements. Now introduced