用金属钼加工磁控管调谐杆螺纹时的工艺分析

Technical Analysis of Tread Processing of Molybdenum Tuning Rods for Magnetrons

金属钼及其合金因为在高温下具有良好的导电性、与玻璃和陶瓷有良好的结合性、较高的强度和低的蒸汽压,在870℃以上仍有良好的抗蠕变性能,所以常用于制造电子管、气体管和电光源的电极、引出杆、调谐杆等各种耐高温零部件,但是金属钼在常温状态时硬而脆,切削加工性能较差。本文结合实际零件加工时刀具的材料、角度、切削用量的选择和对金属钼热处理方式的选择,详细分析了用金属钼加工磁控管调谐杆螺纹时为保证产品质量所采取的工艺措施,为金属钼的常温切削加工提供了有效的方法。

Metal molybdenum and its alloys have good electrical conductivity,good binding property with glass and ceramic,high strength and low vapor pressure at high temperature.They can keep good creep resistance properties even under a temperature above 870℃ and be always used as all kinks of high temperature resistant parts such as electrode,wire rod and tuning rod in electron tubes,gaseous tubes and electric light sources.While molybdenum is hard and brittle and has poor machinability at normal temperature.Considering the selection of cutting tool material,the cutting angle,the cutting quantity and the heat treatment specification in parts machining process,some measurements were adopted in tread processing of molybdenum tuning rods for magnetrons to ensure the quality,which provided an effective method for molybdenum machining at normal temperature.