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发明授权
CN107739924B 一种新能源汽车真空助力器外壳用铝合金带材及制备方法 有权

一种新能源汽车真空助力器外壳用铝合金带材及制备方法
摘要：
本发明提供一种新能源汽车真空助力器外壳用铝合金带材及其制备方法。本发明所制得的铝合金带材的抗拉强度达到220‑255MPa，屈服强度达到105‑135MPa，伸长率≥21%，带材板形平直度≤20 I；既有良好的成形性能，可以满足真空助力器外壳三次深冲、两次翻边的复杂成形工艺，又能满足真空助力器外壳对材料的强度要求；本发明所制得的铝合金的带材制作真空助力器外壳与钢制外壳相比，减重约50%，耐腐蚀性更好，吸收和衰减震动及噪音能力得到明显改善。
摘要（英）：

The invention provides an aluminum alloy strip for a new energy automobile vacuum booster shell and a preparation method of the aluminum alloy strip. The aluminum alloy strip prepared through the method has the characteristics that the tensile strength reaches 220-255 MPa, the yield strength reaches 105-135 MPa, the elongation is larger than or equal to 21%, and the strip shape straightness is smaller than or equal to 20 I; and the aluminum alloy strip has the good shaping property, can meet the requirements of a complex shaping technology, including three times of deep drawing and two times of flanging, of the vacuum booster shell, and also can meet the strength requirement of the vacuum booster shell on a material. Compared with a steel shell, the vacuum booster shell made of the aluminum alloy strip prepared through the method has the advantages that the weight is decreased by about 50%, the corrosion resistance is better, and the vibration and noise absorption and attenuation capability is obviously improved.

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