一前言工业用钼材是以钼粉为原料,用粉末冶金方法制取钼条,然后经机械加工成为板(片)材和线(丝)材。金相观察表明,它们是一种多晶材料。为进一步研究其晶粒取向与加工性能、使用性能的关系,需要研究多晶材料中晶粒取向的规律性。现在虽然有多种确定 A preface Industrial molybdenum is molybdenum powder as raw material, molybdenum strip made by powder metallurgy method, and then processed into a plate (sheet) material and wire (wire) material. Metallographic observation shows that they are polycrystalline materials. In order to further study its grain orientation and processing performance, the relationship between performance, the need to study the regularity of grain orientation in polycrystalline materials. Although there are many kinds of determination now