固溶温度对Ti-0.3Mo-0.8Ni钛合金微观组织与拉伸性能的影响  

Effect of Solid Solution Temperature on Microstructure and Tensile Properties of Ti-0.3Mo-0.8Ni Titanium Alloy

作　　者：梁飞龙 张明玉 宋一新 岳旭 同晓乐 LIANG Fei-long;ZHANG Ming-yu;SONG Yi-xin;YUE Xu;TONG Xiao-le(Xinjiang Xiangrun New Materials Technology Co.,Ltd.,Hami 839000,China;Engineering Research Center of Continuous Extrusion,Dalian Jiaotong University,Dalian 116028,China;Shi Changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]新疆湘润新材料科技有限公司,新疆哈密839000 [2]大连交通大学连续挤压教育部工程研究中心,辽宁大连116028 [3]中国科学院金属研究所师昌绪先进材料创新中心,辽宁沈阳110016

出　　处：《稀有金属与硬质合金》2025年第2期88-93,152,共7页Rare Metals and Cemented Carbides

基　　金：新疆维吾尔自治区重点研发计划项目(2022B01029)。

摘　　要：选取Ti-0.3Mo-0.8Ni钛合金作为试验材料,对其进行不同温度的固溶处理。通过光学显微镜(OM)、扫描电子显微镜(SEM)、X射线衍射仪(XRD)以及拉伸性能测试,研究了固溶温度对Ti-0.3Mo-0.8Ni钛合金微观组织与拉伸性能的影响。结果表明:合金原始组织为经过两相区锻造加工而形成的等轴组织,由大量初生α相(α_(p))以及少量β转变组织(β_(T))构成。随着固溶温度升高,固溶合金组织中α_(p)相逐渐变小,最后完全溶解消失,而析出的α′相含量有所增加且尺寸逐渐增大;合金强度随之提高,而塑性则随之降低;合金断口微观形貌由韧窝转变为结晶状形貌,逐渐出现撕裂棱,断裂特征由韧性断裂向脆性断裂转变。Ti-0.3Mo-0.8Ni titanium alloy was selected as the test material and subjected to solid solution treatment at different temperatures.The effects of solution temperature on the microstructure and tensile properties of Ti-0.3Mo-0.8Ni titanium alloy were studied by optical microscope(OM),scanning electron microscope(SEM),X-ray diffractometer(XRD)and tensile property test.The results show that the original microstructure of the alloy is an equiaxed microstructure formed by forging in the two-phase region,which is composed of a large number of primaryαphase(α_(p))and a small amount ofβ-transformed microstructure(β_(T)).With the increase of solution temperature,theα_(p) phase in the microstructure of the solution-treated alloy gradually becomes smaller,and finally completely dissolves and disappears,while the content of the precipitatedα′phase increases and the size gradually increases.And the strength of the alloy increases,while the plasticity decreases.The fracture micro-morphology of the alloy changes from dimple to crystalline morphology,tear ridges gradually appear,and the fracture characteristic changes from ductile fracture to brittle fracture.

关 键 词：Ti-0.3Mo-0.8Ni钛合金 固溶处理 温度 微观组织 拉伸性能 断口微观形貌 

分 类 号：TG156.1[金属学及工艺—热处理]