Ti-V-Cr系阻燃钛合金厚板组织与力学性能对比研究  

A Comparative Study About Microstructure and Mechanical Properties of Ti-V-Cr Type Burn-resistant Titanium Alloys Slabs

作　　者：赖运金[1,2] 张平祥[1,3] 王凯旋[2] 郝芳[2] 徐广胜[2] 雷锦文[2] 贾蔚菊[3] 胡锐[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,西安710072 [2]西部超导材料科技股份有限公司,西安710018 [3]西北有色金属研究院,西安710016

出　　处：《材料导报》2016年第20期57-61,共5页Materials Reports

基　　金：国家自然科学基金(51504037);国际科技合作专项(2013DFB50180);陕西省科技创新工程项目(2015KTTSG01-08)

摘　　要：研究了WSTi3515S合金和TB12合金的大型铸锭成分和组织均匀性,对比分析了两种Ti-V-Cr系阻燃钛合金厚板的力学性能。结果表明:采用真空自耗电弧熔炼技术制备的Ti-V-Cr系阻燃钛合金3t级大型铸锭成分均匀;利用大型挤压机和大型快锻机制备的阻燃钛合金大尺寸厚板组织和性能均匀;两种合金的室温拉伸、硬度、冲击和540℃高温拉伸等性能相当,WSTi3515S合金在540℃条件下的热强性能较好;V和C元素有利于提高合金的热强性能,且C元素还能细化组织。The uniformities of chemical composition,macrostructure and microstructure of large-sized ingots of two kinds of Ti-V-Cr type burn-resistant titanium alloys,i.e.WSTi3515 Sand TB12were studied in this paper,and the comparative analysis for mechanical properties of their slabs were presented.The results showed that the chemical compositions of Ti-V-Cr type burn-resistant titanium alloy ingots with 3tons degree produced by VAR are uniform.The microstructures and properties of the burn-resistant titanium alloys large-sized slabs produced by the large-tonnage extruder and the large-tonnage quick-forging machine are uniform.The room temperature tensile properties,hardness,impact and high temperature tensile properties at 540 ℃ of two kinds of Ti-V-Cr type burn-resistant titanium alloys are similar.The thermal stability and creep properties of WSTi3515 Salloy at 540℃ are better than TB12 alloy.The effect of elements of V and C to improve the thermal stability and creep properties of Ti-V-Cr type burn-resistant titanium alloy is remarkable.And C element can refine the microstructure of the burn-resistant titanium alloy.

关 键 词：阻燃钛合金 WSTi3515S合金 TB12合金 热挤压开坯 包套保护锻造 

分 类 号：TG146.23[一般工业技术—材料科学与工程]