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为了研究钼杆在拉伸前的组织和性能,合理地制定钼丝的拉伸工艺,利用Gleeble-1500热模拟机,在1000～1200℃分别对准6.0 mm的轧制态纯钼杆和掺杂钼杆进行了高温拉伸试验,并通过光学显微镜和扫描电子显微镜分析了轧制前后钼杆的组织变化及高温拉伸断口形貌。结果表明,纯钼杆和掺杂钼杆在拉伸前的最高抗拉强度分别为175和223 MPa;最大伸长率分别为43.8%和37.3%。两种材料在高温下的断口形貌均表现为韧性断裂。
In order to study the microstructure and properties of molybdenum rod before drawing, the drawing process of molybdenum wire was reasonably established. Using the Gleeble-1500 thermal simulator, 6.0mm rolled pure molybdenum rod and doped The hybrid molybdenum rods were subjected to high temperature tensile test. The microstructures of the molybdenum rods before and after rolling and the morphology of high temperature tensile fracture were analyzed by optical microscope and scanning electron microscope. The results show that the maximum tensile strength of the pure molybdenum rods and molybdenum rods before stretching are 175 and 223 MPa respectively; the maximum elongation is 43.8% and 37.3% respectively. The fracture morphology of the two materials at high temperature showed ductile fracture.