论文部分内容阅读
在宽温度范围内(200～1000℃)对TB10(Ti5Mo5V2Cr3Al)钛合金进行热处理,通过金相显微镜,扫描电子显微镜等观察了合金的微观组织并结合力学性能进行综合分析。结果表明:热处理温度为300℃时的颗粒状析出相,以及800℃时不均匀的长条状析出相,都是对合金塑性有害的微观组织;500℃时的层片状析出相对合金强度极为有利,而700℃时均匀的长条状析出相对合金塑性是有益的。通过优化的热处理制度对有益微观组织进行适当组合,可使合金具有良好的强度和塑性。经过800℃/1 hFC→760℃/WQ+500℃/8 h/AC的热处理,合金的抗拉强度为1340 MPa,断后伸长率为12.5%。
The TB10 (Ti5Mo5V2Cr3Al) titanium alloy was heat-treated in a wide temperature range (200-1000 ℃). The microstructure of the alloy was observed by metallographic microscope and scanning electron microscope, and the mechanical properties were analyzed. The results show that both the precipitated phase at 300 ℃ and the elongated precipitates at 800 ℃ are all detrimental to the ductility of the alloy. The lamellar precipitated alloy at 500 ℃ has a very high strength It is beneficial to have a uniform strip-like precipitation at 700 ° C relative to the plasticity of the alloy. By optimizing the heat treatment system for the appropriate combination of beneficial microstructure, the alloy can have good strength and plasticity. After 800 ℃ / 1 hFC → 760 ℃ / WQ + 500 ℃ / 8 h / AC, the tensile strength of the alloy was 1340 MPa and the elongation at break was 12.5%.