研究了 WSTi3515 S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3 t 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.WSTi3515S and TB12 were 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 3 tons degree produced by VAR are uniform. The microstructures and properties of the burn-resistant titanium alloys large-sized slabs produced by the large-ton-nage 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 tita-nium alloys are similar.The thermal stability and creep properties of WSTi3515S alloy 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-re-sistant titanium alloy is remarkable.And C element can refine the microstructure of the burn-resistant titanium alloy.
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