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首页> 外文会议>THERMEC 2011;International conference on processing manufacturing of advanced materials >Effect of Cold Deformation on the Paint-baking Response of Al-Mg-Si Alloy Sheet for Automotive Body
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Effect of Cold Deformation on the Paint-baking Response of Al-Mg-Si Alloy Sheet for Automotive Body

机译：冷变形对车体Al-Mg-Si合金薄板烤漆响应的影响

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摘要

The effect of cold deformation on the yield strength and precipitate behavior of Al-1.3Mg-1.2Si-0.5Cu-0.7Mn alloy sheet subjected to T4P temper for automotive body panels before and after paint-bake treatment were investigated by tensile test and differential scanning calorimetry (DSC) analysis. The results show that the T4P alloy sheet has significant work-hardening response (WHR), and the yield strength increment exceeds 190MPa as the tensile deformation strain approaches 15%. The unstrained T4P alloy sheet has obvious paint-baking response (PBR), and the yield strength increment is up to 80MPa, while the PBR of the cold stretched T4P alloy sheets decrease with increasing level of tensile deformation, and the minimal PBR is only 17.8MPa. The prior tensile deformation accelerates the precipitation of β" and β' phase from the T4P alloy matrix during paint-bake cycle but weakens the age-hardening response (AHR) and PBR of T4P alloy sheet. Moreover, it is evident that the T4P alloy sheet simulation paint-bake treated at 170°C for 30min can not fully exert the aging potential of the alloy sheet.
机译：通过拉伸试验和差示试验研究了冷变形对T4P回火的车身板烤漆前后Al-1.3Mg-1.2Si-0.5Cu-0.7Mn合金薄板屈服强度和析出行为的影响。扫描量热法（DSC）分析。结果表明，T4P合金薄板具有显着的加工硬化响应（WHR），当拉伸变形应变接近15％时，屈服强度增量超过190MPa。未拉伸的T4P合金薄板具有明显的烤漆响应（PBR），屈服强度增量高达80MPa，而冷拉伸的T4P合金薄板的PBR随拉伸变形水平的提高而减小，最小PBR仅为17.8。 MPa。先前的拉伸变形在烤漆周期中加速了T4P合金基体中的β“和β'相的析出，但削弱了T4P合金板的时效响应（AHR）和PBR。在170°C下处理30分钟的板材模拟烤漆不能充分发挥合金板材的时效潜力。

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