Y元素对锻造热处理Ti-Fe-Mo合金显微组织及力学性能的影响  

The Effect of Y Element on the Microstructure and Mechanical Properties of Ti-Fe-Mo Alloy after Forging Heat Treatment

作　　者：刘少洲 Liu Shaozhou(Shanxi Xingxin Safety Production Technology Service Co.,Ltd.,Taiyuan Shanxi 030024,China)

机构地区：[1]山西兴新安全生产技术服务有限公司,山西太原030024

出　　处：《山西冶金》2024年第9期12-14,共3页Shanxi Metallurgy

摘　　要：根据是否掺入Y元素设计两类样品,以空冷、炉冷工艺制备出钛合金烧结坯,通过室温拉伸试验,检验金相显微组织,以此来分析添加Y元素对Ti-Fe-Mo合金显微组织及力学性能的影响机制。结果表明:合金强度和塑性最佳匹配状态的退火温度为650℃,若高于β转变点温度,α相转为β相,受稀土氧化物颗粒影响,保留的β晶粒无法生长,尺寸约为80~100μm;Ti-Fe-Mo合金的室温拉伸强度和延伸率因添加YH_(2)后得到改善,拉伸强度相比未添加YH_(2)合金的样品高50~70 MPa。Two types of samples were designed based on whether Y element was added.Titanium alloy sintered billets were prepared by air cooling and furnace cooling processes.The metallographic microstructure was examined by room temperature tensile testing to analyze the influence mechanism of Y element on the microstructure and mechanical properties of Ti-Fe-Mo alloy.The results show that the annealing temperature for the optimal matching state of alloy strength and plasticity is 650 ℃.If it is higher than the β transformation point temperature,the a phase transforms into the β phase.Due to the influence of rare earth oxide particles,the retained β grains cannot grow,with a size of about 80~100 μm.The room temperature tensile strength and elongation of Ti-Fe-Mo alloy were improved by adding YH_(2),and the tensile strength was 50~70 MPa higher than that of the sample without YH_(2) alloy.

关 键 词：钛合金 Y元素 锻造热处理 显微组织 力学性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]