行星轧制变形程度对TP2铜管材组织及性能的影响

目的研究行星轧制变形程度对TP2铜管材在轧制和联拉时的组织和性能的影响。方法采用金相显微分析和拉伸实验,研究行星轧制变形程度对TP2铜管铸坯轧拉态以及拉拔态组织及性能的影响规律。结果经连续铸造的TP2铸坯为柱状晶,且由外向内成长。经行星轧制、联拉后的管材晶粒纤维流线,其晶粒显著拉长,随着轧制变形程度的增加,流线减弱,晶粒更加细化。轧制变形程度为93%与90%的轧管屈服强度、抗拉强度分别降低了22.83%和7.59%,伸长率提升了4.44%,塑性变形能力增加。结论随着轧制变形程度的增加,联拉管抗拉强度略有提高,而伸长率得到了保持。

Effects of Planetary Rolling Deformation on Microstructure and Properties of TP2 Copper Tube

The aim is to study effects of planetary rolling deformation on microstructure and properties of TP2 copper tube during rolling and tension. The effect law of planetary rolling deformation on microstructure and properties of TP2 copper tube during rolling and drawing were studied by optical metallographic microscope and testing machine. The results indicated that the TP2 casting of continuous casting was columnar and grew from the outside to the inside. The grain fiber streamline of the tube after planetary rolling and drawing was significantly elongated. With the increase of rolling deformation, the streamlines became weaker and the grains became more refined. The yield strength and tensile strength of rolled tubes with rolling deformation of 93% and 90% respectively were decreased by 22.83% and 7.59% respectively, their elongation was increased by 4.44%, and their plastic deformation ability was increased. The tensile strength and slightly increases and the elongation is maintained with the increase of the rolling deformation.