【摘要】 采用粉末冶金技术（高能球磨、滚动球磨、冷等静压和热等静压）研制出TiAlMn+ZrO₂弥散强化型高温合金,并利用X射线衍射仪、扫描电子显微镜（SEM）和三点弯曲等技术分析了该合金的组织结构和性能。结果表明,最佳的TiAlMn+ZrO₂合金的密度为3.972 g/cm³,抗弯强度为658.07 MPa。结果还表明,高能球磨可使ZrO₂质点高度弥散分布,从而可获得细晶组织的合金;用高能球磨粉制得的合金性能优于滚动球磨粉制得的合金性能。更多还原

【Abstract】 TiAlMn superalloy reinforced by dispersed ZrO₂ particles was prepared by means of P/M techniques, such as high energy ball-milling, general ball-milling, cold isostatic pressing and hot isostatic pressing. Microstructures, phase characteristics and properties of the superalloy were studied by X-ray diffractometry and electron microscopy. The results showed that the density of the best TiAlMn+ZrO₂ alloy was 3.972g/cm³, and the bending strength of the alloy was 658.07 MPa.ZrO₂ particles were dispersed homogenously by high-energy ball- milling, and the alloy obtained fine grain size. The properties of the alloy made from high-energy ball-milling powders are superior to that of the alloy made from general ball- milled powder.更多还原