CAJ | 학술논문

采用非自耗电弧炉制备了Ti-xZr-5Mo合金,利用X射线衍射仪、倒置金相显微镜、维氏硬度计、磨损试验机,测试并分析了Zr元素对合金的相结构、显微组织、硬度(HV)和磨损性能的影响.结果表明,Ti-xZr-5Mo合金主要由等轴的α晶粒组成,随着Zr含量的增加,合金中α相比例增大,但在慢速冷却过程中,Zr可以和β相稳定元素(Mo)一起,稳定β相至室温,使得退火后合金β相比例增大;且随着Zr含量的增加,合金的硬度(HV)值、耐磨性均显著提高.
채용비자모전호로제비료Ti-xZr-5Mo합금,이용X사선연사의、도치금상현미경、유씨경도계、마손시험궤,측시병분석료Zr원소대합금적상결구、현미조직、경도(HV)화마손성능적영향.결과표명,Ti-xZr-5Mo합금주요유등축적α정립조성,수착Zr함량적증가,합금중α상비례증대,단재만속냉각과정중,Zr가이화β상은정원소(Mo)일기,은정β상지실온,사득퇴화후합금β상비례증대;차수착Zr함량적증가,합금적경도(HV)치、내마성균현저제고.
Effects of Zr element on phase structure, microstructure, Vickers hardness and wear resistance of Ti-xZr-5Mo alloy prepared by non-consumable electric arc furnace were analyzed by XRD (X-ray diffraction), 4XC upside-down microscope for metallography, HV-50A sclerometer and M-200 abrasive machine. The results reveal that Ti-xZr-5Mo alloy is mainly composed of equiaxed α phase, and equiaxed α phase is increased with increasing in Zr content. However, β phase is increased in the annealed alloy during slow cooling rate, which is attributed to Zr element and Mo element stabilizing β phase to room temperature. Meanwhile, with increasing in Zr content, hardness and wear resistance of the alloy are greatly improved.