Ti-3Al-5Mo-4.5V合金的组织与性能  

Microstructures and Properties of the Ti-3Al-5Mo-4.5V Alloy

作　　者：张青来[1] 匡雁锐[1] 韩寅奔[2] 韩伟东 冯甜甜[1] 

机构地区：[1]江苏大学,江苏镇江212013 [2]东北大学,辽宁沈阳110004 [3]宝鸡市博信金属材料有限公司,陕西宝鸡721013

出　　处：《稀有金属材料与工程》2013年第5期984-988,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51175231)

摘　　要：通过透射电镜（TEM）、扫描电镜（SEM）、光学显微镜（OM）和X射线衍射（XRD）手段,研究BT16钛合金丝材制备过程中微观组织演变、丝材的力学性能和冷镦性能以及固溶时效合金组织结构。结果表明：BT16合金丝材具有良好的力学性能,断面收缩率Ψ为62%~65%,顶镦螺栓头部变形量达到75%,未见任何缺陷。钛合金铸锭是树枝状α＋β两相组织;锻坯横截面变形不均匀,析出等轴状、短棒状和针状α相;热锻棒材边界和晶内均有细小针状α相析出;丝材组织由初生等轴α相和β相组成;固溶时效后合金组织由初生等轴α相和析出针状α相的β转变组织组成。The microstructure evolution during the preparation process of BT16 titanium alloy wires, mechanical properties and cold upsetting performance of the wires, and microstructure of the solid-aged alloy were investigated by transmission electron microscope （TEM）, scanning electronic microscope （SEN）, optical microscope （OM） and X-ray diffraction （XRD）. The results show that BT16 alloy wires have excellent mechanical properties with reduction of area Ψ 62%~65%. The cold upsetting bolt can achieve the head deformation of 75% without any defects. The titanium alloy ingot has dendritic α＋β phases. Transverse section of the forged billet deforms unevenly and the equiaxial, the short-bar and the needle α phases precipitate. The hot forged bars have the fine needle α phase precipitation in the boundaries and grains. The microstructure of alloy wires consists of the primary equiaxial α phases and intergranular β phases. The microstructure of the solid-aged alloy is composed of equiaxial primary α phases and β phases which precipitate the secondary needle α phases.

关 键 词：BT16钛合金 微观组织 固溶时效 力学性能 冷镦性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]