退火温度对新型高强耐蚀钛合金组织与性能的影响  

Effects of Annealing Temperature on Microstructure and Properties of New High Strength Corrosion Resistant Titanium Alloy

作　　者：肖寒[1] 于佳新 张宏宇 谭聪 黄海广[1,2] 余堃 周荣锋 Xiao Han;Yu Jiaxin;Zhang Hongyu;Tan Cong;Huang Haiguang;Yu Kun;Zhou Rongfeng(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;Yunnan Titanium Industry Co.,Ltd,Chuxiong 651209,China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]云南钛业股份有限公司,云南楚雄651209

出　　处：《稀有金属材料与工程》2022年第3期947-952,共6页Rare Metal Materials and Engineering

基　　金：云南省重大科技专项计划(202002AB080001-3);国家重点研发计划(2016YFB0301202)。

摘　　要：研究了一种新型高强耐蚀钛合金材料,通过将3次真空自耗电弧熔炼(VAR)炉熔炼后铸锭进行热轧和退火处理,研究退火工艺对板材微观组织和性能的影响。研究发现,退火后整体组织分布均匀,随着退火温度的升高,条状α相减少,等轴α相增多,β转变组织长大、增多。在740℃退火1 h时,条状的α相基本消失,β转变组织长大、增多并且粘连在一起,呈现典型的等轴组织形貌。随着退火温度的升高,板材的强度和洛氏硬度下降,塑性提高,腐蚀电流密度降低,腐蚀速率减慢,耐腐蚀性能增强。在740℃退火1 h后,板材具有最佳的力学性能和耐腐蚀性能。A new high-strength corrosion-resistant titanium alloy was studied.The ingot was hot rolled and annealed after three times VAR furnace melting,and the effects of annealing process on the microstructure and properties of the plate were studied.The results show that the overall structure is uniformly distributed after annealing.As the annealing temperature increases,the lamellarαphase decreases,the equiaxedαphase increases,and theβ-transformed structure grows and increases.When annealed at 740℃for 1 h,the lamellarαphase basically disappears,and theβ-transformed structure grows,increases and strikes together,showing a typical equiaxed structure.As the annealing temperature increases,the strength and hardness of the plate decrease,the plasticity increases,the corrosion current density decreases,the corrosion rate decreases,and the corrosion resistance increases.After annealing at 740℃for 1 h,the plate has the best mechanical properties and corrosion resistance.

关 键 词：耐蚀钛合金 退火温度 显微组织 力学性能 耐腐蚀性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]