钼是一种银灰色的金属。熔点2620℃,比重10.35克/厘米~3,在地壳中钼含量约占0.003%,属于稀有元素之一。在空气中400℃以下不发生氧化,高于600℃时钼与氧结合成挥发性的三氧化钼(M_oO_3)。近年来钼已成为冶金工业重要的合金元素之一,多以钼铁的形式加入钢中,使钢的晶粒细化,组织性能得以改善,增加钢的稳定性和可锻性。因此,在许多结构钢、耐 Molybdenum is a silver-gray metal. Melting point 2620 ℃, the proportion of 10.35 g / cm ~ 3, in the crust of molybdenum content of about 0.003%, is one of the rare elements. In the air does not occur below 400 ℃ oxidation, higher than 600 ℃ molybdenum and oxygen combine into a volatile molybdenum trioxide (M_oO_3). In recent years, molybdenum has become one of the important alloying elements in the metallurgical industry. Most of the molybdenum is added into the steel in the form of molybdenum iron. The grain refinement of the steel improves the microstructure and improves the stability and malleability of the steel. Therefore, in many structural steel, resistant