微观组织和织构对H65黄铜带材折弯性能的影响

电子产品关键部件小型化对黄铜合金带材折弯性能提出了更高的要求。研究了微观组织和织构对H65黄铜带材折弯性能的影响规律和影响机制。结果表明：带材平行于轧向折弯较垂直于轧向折弯更易于产生表面褶皱和裂纹，且随着折弯半径的减小，折弯性能降低。折弯变形过程中带材外表面易形成剪切带，所产生的剪切变形是造成表面褶皱和开裂的主要原因。微观组织不均匀、较强的Brass织构易导致带材折弯过程中产生剪切变形，造成带材折弯性能下降。通过调控热处理工艺来调整带材织构，减少或抑制剪切带的产生，能够提升带材的折弯性能。

Effects of Microstructure and Texture on Bending Properties of H65 Brass Sheet

The miniaturization of electronic products key components puts forward higher requirements for the bending properties of brass alloy strip. The effects of microstructure and texture on the bending properties of H65 sheet strip were studied. The results show that the bending parallel to the rolling direction is easier to produce surface wrinkle and cracks compared with the bending perpendicular to the rolling direction, and the bending properties decreases with the decrease of bending radius. In the process of bending deformation, shear bands are easy to form on the outer surface of the sheet, and the resulting shear deformation is the main cause of surface wrinkles and cracks. The non-uniform microstructure and strong brass texture are easy to cause shear deformation, resulting in the decline of sheet bending performance. It can improve the bending properties of the sheet by adjusting the heat treatmen process parameters to adjusting the sheet texture and reducing or inhibiting the generation of shear bands.