<h1 class="title">超硬铝合金</h1> <p> <script></script> <script type="text/javascript"></script> </p> <div id="lemmaContent-0" class="lemma-main-content">　　superhard aluminium alloy 　　在<a href="//member.alu.cn/view/4615.htm" target="_blank"><span quot;color: #136ec2;">铝</span></a>-<a href="//member.alu.cn/view/5161.htm" target="_blank"><span quot;color: #136ec2;">锌</span></a>-<a href="//member.alu.cn/view/4779.htm" target="_blank"><span quot;color: #136ec2;">镁</span></a>系的基础上添加<a href="//member.alu.cn/view/36056.htm" target="_blank"><span quot;color: #136ec2;">铜</span></a>发展起来的<strong><a href="//member.alu.cn/view/64589.htm" target="_blank"><span quot;color: #136ec2;">铝合金</span></a></strong>，其<a href="//member.alu.cn/view/91950.htm" target="_blank"><span quot;color: #136ec2;">强度</span></a>可达784N/mm2，但耐热耐蚀性差，对<strong><a href="//member.alu.cn/view/4649.htm" target="_blank"><span quot;color: #136ec2;">铁</span></a></strong><a href="//member.alu.cn/view/784338.htm" target="_blank"><span quot;color: #136ec2;">敏感</span></a>、抗<a href="//member.alu.cn/view/545581.htm" target="_blank"><span quot;color: #136ec2;">应力腐蚀</span></a>性差，适当控制<a href="//member.alu.cn/view/101949.htm" target="_blank"><span quot;color: #136ec2;">合金</span></a>中锌和镁的比例，可添加铜、<a href="//member.alu.cn/view/37938.htm" target="_blank"><span quot;color: #136ec2;">锰</span></a>等<a href="//member.alu.cn/view/19993.htm" target="_blank"><span quot;color: #136ec2;">元素</span></a>后，将进一步提高合金强度，改善<a href="//member.alu.cn/view/337753.htm" target="_blank"><span quot;color: #136ec2;">塑性</span></a>和耐应力腐蚀性能，<a href="//member.alu.cn/view/10102.htm" target="_blank"><span quot;color: #136ec2;">工业</span></a>上使用的室温<a href="//member.alu.cn/view/34946.htm" target="_blank"><span quot;color: #136ec2;">力学</span></a>性能较高，一般σb为490～690MPa的可<a href="//member.alu.cn/view/4568481.htm" target="_blank"><span quot;color: #136ec2;">压力加工</span></a>铝合金。又称高度度铝合金。主要是Al-Zn-Mg-<a href="//member.alu.cn/view/9259.htm" target="_blank"><span quot;color: #136ec2;">Cu</span></a>系合金。其中锌和镁<a href="//member.alu.cn/view/1073612.htm" target="_blank"><span quot;color: #136ec2;">含量</span></a>的比值及锌、镁、铜含量的总和不同，合金的性能也不同。锌和镁含量的<a href="//member.alu.cn/view/452535.htm" target="_blank"><span quot;color: #136ec2;">比值</span></a>增加，合金的<a href="//member.alu.cn/view/32682.htm" target="_blank"><span quot;color: #136ec2;">热处理</span></a>效果加大，强度提高，但应力腐蚀<a href="//member.alu.cn/view/95419.htm" target="_blank"><span quot;color: #136ec2;">敏感性</span></a>加大。当锌、镁、铜含量的总和大于9％(质量)时，合金的<a href="//member.alu.cn/view/542577.htm" target="_blank"><span quot;color: #136ec2;">拉伸强度</span></a>较高。<a href="//member.alu.cn/view/1220109.htm" target="_blank"><span quot;color: #136ec2;">熔融法</span></a>制锭，再压力加工<a href="//member.alu.cn/view/661948.htm" target="_blank"><span quot;color: #136ec2;">成材</span></a>。用于生产各种<a href="//member.alu.cn/view/1308476.htm" target="_blank"><span quot;color: #136ec2;">锻件</span></a>和<a href="//member.alu.cn/view/1283276.htm" target="_blank"><span quot;color: #136ec2;">模锻件</span></a>，制作<a href="//member.alu.cn/view/4556.htm" target="_blank"><span quot;color: #136ec2;">飞机</span></a>的<a href="//member.alu.cn/view/585660.htm" target="_blank"><span quot;color: #136ec2;">蒙皮</span></a>、<a href="//member.alu.cn/view/200704.htm" target="_blank"><span quot;color: #136ec2;">螺钉</span></a>、承力构件、<a href="//member.alu.cn/view/407650.htm" target="_blank"><span quot;color: #136ec2;">大梁</span></a><a href="//member.alu.cn/view/527531.htm" target="_blank"><span quot;color: #136ec2;">桁条</span></a>、<a href="//member.alu.cn/view/3831752.htm" target="_blank"><span quot;color: #136ec2;">隔框</span></a>和<a href="//member.alu.cn/view/3831775.htm" target="_blank"><span quot;color: #136ec2;">翼肋</span></a>等。</div>