高压处理对铝青铜组织与抗压强度的影响

Effects of High Pressure Treatment on Microstructure and Compressive Strength of Aluminum Bronze

利用电子万能试验机,测试了经高压处理前、后铝青铜的抗压强度,并通过X射线衍射(XRD)、金相显微镜、透射电子显微镜及扫描电子显微镜,对高压处理前、后铝青铜的相组成、微观组织及压缩断口进行了分析,探讨高压处理对铝青铜抗压性能的影响。结果表明:高压处理能细化铝青铜组织,2GPa压力处理能降低铝青铜的抗压强度,2GPa压力处理后再经600℃保温2min热处理,铝青铜的抗压强度有所增大,较高压处理前的抗压强度增大约34%。

The effects of high pressure treatment on the compressive strength of aluminum bronze were investigated, based on the measurement of its compressive strength, the analysis of its phase composi- tion,and the observation of its microstructure and fracture morphology by means of electronic univer sal testing machine, X-ray diffraction, optical microscope, transmission electron microscope （TEM）, and scanning electron microscope （SEM）. The results show that high pressure treatment is favorable to form fine-grained microstructures and can reduce the compressive strength of aluminum bronze, while the compressive strength of the aluminum bronze treated at 2 GPa and kept at 600 ℃ for 2 min is increased about by 34 %, compared with the as-cast alloy.