对经过点火试验后的反坦克导弹钼喷管，用扫描电子显微镜(SEM)进行了检验，探讨了钼喷管的烧蚀机理，包括塑一粘性流动、机械磨损、冷一热脆裂、共晶熔化、化学腐蚀等因素的综合作用。它既取决于钼喷管材料本身的物理、机械及化学性能，也与推进剂、包覆层、绝热层及发动机等性能有关。并相应提出了减轻烧蚀的措施。

The examination has been made with SEM for the Molybdenum nozzle of the anti-tank missile after passing the firing test. The erosion mechanism of the molybdenum nozzle is investigated, including all factors such as plasticity-cohesiveness fluxion, mechanical abrasion, cold-hot brittle crack, eutectic melting, chemical corrosion，etc. It depends both on the physical, mechanical and chemical properties of the material of which the nozzle is made and on the properties of the propellant, wrapping coat，insu- lating coat and combustor. Measures taken for relieving erosion are correspondingly made.