Effect of Second Annealing on Properties and Microstructures of Commercial Pure Titanium
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摘要: 研究了二次退火对工业冷轧纯钛微观组织和力学性能的影响。结果表明,二次退火对提高工业纯钛塑性加工性能具有重要作用。发现对出厂态冷轧纯钛带进行二次退火后晶粒尺度基本保持不变,而孪晶数量随退火温度的升高而增加。低于650℃对纯钛带进行退火处理后其屈服强度和抗拉强度基本不变,高于650℃对纯钛带进行退火处理其屈服强度明显下降;710℃×30 min二次退火能够在不改变工业纯钛抗拉强度的前提下明显降低其屈服强度,提高其断后延伸率,获得优异的加工性能。Abstract: The microstructures and mechanical properties of cold rolled commercial pure titanium after second annealing was studied.The results show that:the second annealing has no effect on grain size of the factory state pure titanium belt,but it plays an important role in improving the commercial pure titanium plastic processing performance.Moreover,the number of twins increases with the increasing annealing temperature.When the second annealing temperature is lower than 650℃,the yield stress/tensile strength remains unchange.When the second annealing temperature is higher than 650℃,the yield strength decreases obviously; 710℃×60 min annealing can obviously reduce the yield strength and improve its elongation without changing the tensile strength of pure titanium,the sample exhibits excellent processing performance.
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Key words:
- pure titanium /
- annealing /
- microstructure /
- mechanical property /
- temperature
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