组织和拉伸性能的影响
(西北有色金属研究院，西安 710016)
摘 要: 研究冷变形程度、冷变形参数Q值和退火温度等变形和热处理参数与CT20钛合金管材拉伸性能的关系，以及CT20钛合金管材的冷加工变形特点和组织性能的变化规律。结果表明：CT20钛合金具有较强的冷变形能力、较宽的退火温度区域，可通过增大Q值来提高管材的屈服强度；选择合适的退火制度，可获得不同的合金组织形貌；等轴组织具有更加优异的室温拉伸性能。
关键字: CT20钛合金；冷变形；退火；组织；拉伸性能
microstructure and tensile properties of CT20 alloy tube
（Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China）
Abstract:The relationship between the parameters of deformation degree, Q value, annealing temperature and tensile properties of the CT20 alloy tube the variation regularities of deformation characteristic and microstructure were studied. The results show that the alloy has good cold workability, wider annealing temperature range, and the strength of the alloy tube can be improved by increasing of Q value; the different typical microstructure can be obtained by selecting different annealing temperature; the equiaxed microstructure has good tensile properties at room temperature.
Key words: CT20 alloy; cold deformation; annealing; microstructure; tensile property
