高温热循环对Ti-22Al-25Nb合金板材性能的影响  

Effect of high temperature thermal cycle on the properties of Ti-22Al-25 Nb alloy plate

作　　者：史晓强 马雄 张魁宝[3] 赵洪泽 梁晓波 张建伟 王红卫[1,2] 石雨非 SHI Xiaoqiang;MA Xiong;ZHANG Kuibao;ZHAO Hongze;LIANG Xiaobo;ZHANG Jianwei;WANG Hongwei;SHI Yufei(Beijing Cisri-gaona Materials and Technology Co.,Ltd.,Beijing 100081,China;HighTemperature Materials Research Institute,Central lron and Steel Research Institute,Beijing 10008l,China;State Key Laboratory of Environment-Friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)

机构地区：[1]北京钢研高纳科技股份有限公司,北京100081 [2]钢铁研究总院有限公司高温材料研究所,北京100081 [3]西南科技大学环境友好能源材料国家重点实验室,四川绵阳621010

出　　处：《金属功能材料》2023年第4期35-40,共6页Metallic Functional Materials

基　　金：国家科技项目(外21051480B)。

摘　　要：通过设计700℃×1 h热循环疲劳试验,研究了700℃热循环对Ti-22Al-25 Nb合金板材室温性能和组织的影响规律。结果表明:700℃热循环后会在Ti-22Al-25 Nb合金板材表面形成氧化层,在氧化层与基体间形成脆性层,热循环次数越多,氧化层与脆性层越厚,室温强度与屈服强度越低;室温伸长率随着循环次数增多而降低,在热循环100次后降为2%,之后在热循环500次以内可保持在2%以上。The effects of 700℃thermal cycling on the properties and microstructure of Ti-22Al-25 Nb alloy sheet at room temperature were studied by designing 700℃X 1 h thermal cycling.The results show that an oxide layer is formed on the surface of Ti-22Al-25 Nb alloy sheet after 700℃thermal cycling,and a brittle layer is formed between the oxide layer and the substrate,the room temperature strength and yield strength decreased,and the room temperature elongation decreased with the increase of cycle times,and decreased to 2%after 100 cycles,and then kept above 2%within 500 cycles.

关 键 词：Ti-22Al-25Nb合金板材 高温热循环 氧化层 

分 类 号：TG146.23[一般工业技术—材料科学与工程]