一、前言 金属钼的熔点虽然很高(2620℃左右),但钼丝在1000～1200℃退火处理后,强度和塑性大大降低,变成不耐碰撞、不能承受弯曲的脆性材料。实际应用中,要求钼丝在再结晶状态下,仍具有较好的强度和塑性。例如,在以石英玻璃为泡壳的特种灯泡生产中,灯泡的钼丝引出线要经受1800～1850℃ I. Introduction Although the melting point of molybdenum metal is very high (around 2620 ℃), the strength and ductility of molybdenum wire is greatly reduced after annealing at 1000-1200 ℃. It becomes a dull and impractical material and can not withstand bending brittle materials. In practice, molybdenum wire is required to have good strength and ductility in the recrystallized state. For example, in specialty bulb production with quartz glass as a blister, the bulb’s molybdenum leads are exposed to 1800-1850 ° C