前言钼是ⅥB 族元素,呈体心立方晶格,密度大、熔点高、膨胀系数小,是电、热的良导体并具有优异的高温性能,因此在现代工业中得到日益广泛地应用。它在冶金、电子、化工、宇航等工业部门均占有重要的位置。它是现代社会不可缺少的金属材料之一。钼作为工具钢的添加元素约占钼总产量的8%,而钼制品在工模具方面应用仅占钼 Preface Molybdenum is a Group VIB element with a body-centered cubic lattice with high density, high melting point and small expansion coefficient. It is a good conductor of electricity and heat and has excellent high temperature performance. Therefore, it has been widely used in modern industry. It occupies an important position in metallurgy, electronics, chemical industry, aerospace and other industrial sectors. It is one of the indispensable metal materials in modern society. Molybdenum as a tool steel additive element accounts for about 8% of the total molybdenum production, molybdenum products in the mold application only accounted for molybdenum