供应2024硬铝合金（铜铝合金）美铝

<p>  2024<span style="font-family: 宋体;">为铝－铜－镁系中的典型硬铝合金，其成份比较合理，综合性能较好。很多国家都生产这个合金，是硬铝中用量非常大的。该合金的特点是：强度高，有一定的耐热性，可用作</span><span style="font-family: Times New Roman;">150</span><span style="font-family: 宋体;">°</span><span style="font-family: Times New Roman;">C</span><span style="font-family: 宋体;">以下的工作零件。温度高于</span><span style="font-family: Times New Roman;">125</span><span style="font-family: 宋体;">°</span><span style="font-family: Times New Roman;">C</span><span style="font-family: 宋体;">，</span><span style="font-family: Times New Roman;">2024</span><span style="font-family: 宋体;">合金的强度比</span><span style="font-family: Times New Roman;">7075</span><span style="font-family: 宋体;">合金的还高。热状态、退火和新淬火状态下成形性能都比较好，热处理强化效果显著，但热处理工艺要求严格。抗蚀性较差，但用纯铝包覆可以得到有效保护</span><span style="font-family: Times New Roman;">;</span><span style="font-family: 宋体;">焊接时易产生裂纹，但采用特殊工艺可以焊接，也可以铆接。广泛用于飞机结构、铆钉、卡车轮毂、螺旋桨元件及其他种种结构件。</span></p> <p class="p0"><span><span style="font-family: 宋体;">  </span></span></p> <div class="Section0"> <p class="p0"><span>2024<span style="font-family: 宋体;">力学性能： 　　</span></span></p> <p class="p0"> </p> <p class="p0"><span>抗拉强度 σ<span style="font-family: Times New Roman;">b (MPa)</span><span style="font-family: 宋体;">：≥</span><span style="font-family: Times New Roman;">390 </span></span></p> <p class="p0"><span>条件屈服强度 σ<span style="font-family: Times New Roman;">0.2 (MPa)</span><span style="font-family: 宋体;">：≥</span><span style="font-family: Times New Roman;">255 </span></span></p> <p class="p0"><span>伸长率 δ<span style="font-family: Times New Roman;">5 (%)</span><span style="font-family: 宋体;">：≥</span><span style="font-family: Times New Roman;">12 </span></span></p> <p class="p0"> </p> <p class="p0"><span>注 ：棒材室温纵向力学性能 　　</span></p> <p class="p0"><span>试样尺寸：棒材直径<span style="font-family: Times New Roman;">(</span><span style="font-family: 宋体;">方棒、六角棒内切圆直径</span><span style="font-family: Times New Roman;">)</span><span style="font-family: 宋体;">≤</span><span style="font-family: Times New Roman;">22 </span></span></p> <p class="p0"> </p> <p class="p0"><span>铝及铝合金其它金属材料相比，具有以下一些特点： 　　</span></p> <p class="p0"> </p> <p class="p0"><span>1<span style="font-family: 宋体;">、密度小 　　铝及铝合金的密度接近</span><span style="font-family: Times New Roman;">2.7g/,</span><span style="font-family: 宋体;">约为铁或铜的</span><span style="font-family: Times New Roman;">1/3</span><span style="font-family: 宋体;">。 　　</span></span></p> <p class="p0"><span><span style="font-family: Times New Roman;">2</span><span style="font-family: 宋体;">、强度高 　　铝及铝合金的强度高。经过一定程度的冷加工可强化基体强度</span><span style="font-family: Times New Roman;">,</span><span style="font-family: 宋体;">部分牌号的铝合金还可以通过热处理进行强化处理。 　　</span></span></p> <p class="p0"><span>3<span style="font-family: 宋体;">、导电导热性好 　　铝的导电导热性能仅次于银、铜和金。 　　</span></span></p> <p class="p0"><span><span style="font-family: Times New Roman;">4</span><span style="font-family: 宋体;">、耐蚀性好 　　铝的表面易自然生产一层致密牢固的</span><span style="font-family: Times New Roman;">AL2O3</span><span style="font-family: 宋体;">保护膜，能很好的保护基体不受腐蚀。通过人工阳较氧化和着色，可获得良好铸造性能的铸造铝合金或加工塑性好的变形铝合金。 　　</span></span></p> <p class="p0"><span><span style="font-family: Times New Roman;">5</span><span style="font-family: 宋体;">、易加工</span></span></p> </div>