Kaiser铝及化学公司发展了一种牌号为7039的A1—zn—Mn系新型热处理强化可焊铝合金。其化学成分如表1所示。7039及其它几种铝合金的物理性能如表2所示。为了改善合金的抗腐蝕性和提高强度,合金中还加入了少量的其它元素如Cr和Mg。7039铝合金焊接以后的强度比以往常用的非热处理可焊铝合金约高 Kaiser Aluminum and Chemicals have developed a new Al-zn-Mn based heat-treatable weldable aluminum alloy, Grade 7039. The chemical composition shown in Table 1. 7039 and several other aluminum alloy physical properties shown in Table 2. In order to improve the corrosion resistance of the alloy and increase the strength, a small amount of other elements such as Cr and Mg are added to the alloy. 7039 aluminum alloy after welding strength than ever before non-heat treatment solderable aluminum alloy about high