摘要
将TA10钛合金分别在860℃(两相区)和900℃(单相区)加热,然后进行水冷、空冷和炉冷。使用光学显微镜、扫描电镜、X射线衍射仪以及冲击性能测试,分析TA10钛合金经不同冷却方式处理后的微观组织以及冲击性能。结果表明,当加热温度为两相区时,合金经水冷与空冷处理会形成双态组织,经炉冷处理会形成等轴组织。不同温度加热后不同冷却方式下,合金经炉冷处理后的冲击性能最佳,其次是空冷,水冷最差。当加热温度为两相区860℃时,采用炉冷处理后合金的冲击性能最佳,冲击吸收能量最大,为88 J。3种冷却方式下的冲击断口均为韧窝形貌,炉冷条件下的断口中韧窝尺寸最大。当加热温度为单相区900℃时,合金经水冷与空冷处理会形成细片层β转变组织,且出现粗大β晶粒,经炉冷处理会形成粗片层β转变组织,晶界α相明显粗化,3种冷却方式下冲击断口均为岩石状形貌,且在其表面分布深度较浅且尺寸较小的韧窝。
TA10 titanium alloy was heated at 860℃(in the two-phase region)and at 900℃(in the single-phase region),respectively,and then water cooled,air cooled and furnace cooled.The effect of different cooling methods on the microstructure and impact property of the TA10 titanium alloy was studied by means of optical microscope,scanning electron microscope,XRD and impact test.The results show that when the heating temperature is in the two-phase region,the alloy forms a bimodal structure after water and air cooling,and an equiaxed structure after furnace cooling.After heating at different temperatures,under different cooling methods,the impact property of the alloy after furnace cooling is the best,followed by air cooling,and that after water cooling is the worst.When the heating temperature is 860℃in the two-phase region,the impact absorbed energy of the alloy after furnace cooling is the best and the maximum impact absorbed energy is 88 J.The fracture under three cooling methods is dimple morphology when the alloy is heated at 860℃.The size of dimples in the fracture under furnace cooling condition is the largest.When the heating temperature is 900℃in the single-phase region,the alloy forms a fine lamellarβtransformed microstructure after water cooling and air cooling,and coarseβgrains appear.After furnace cooling,coarse lamellarβtransformed microstructure is formed,and theαphase on grain boundary is obviously coarsened.The fracture under three cooling methods is rock-like morphology,and dimples with shallow depth and small size are distributed on the surface.
作者
同晓乐
张明玉
张天蔚
岳旭
Tong Xiaole;Zhang Mingyu;Zhang Tianwei;Yue Xu(Xinjiang Xiangrun New Materials Technology Co.,Ltd.,Hami Xinjiang 839000,China;School of Mechanical Engineering,Dalian Jiaotong University,Dalian Liaoning 116028,China;Shi Changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang Liaoning 110016,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2024年第12期40-45,共6页
Heat Treatment of Metals
基金
新疆维吾尔自治区重点研发计划(2022B01029)。
关键词
TA10钛合金
冷却方式
微观组织
冲击性能
断口形貌
TA10 titanium alloy
cooling method
microstructure
impact property
fracture morphology
