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<h1 class="chanpT">镀锌钢板用什么方法焊接</h1>
<div class="chanpTime">发布时间:2021-11-19</div>
<div class="chanpC"><p><span style="font-size:16px">镀锌钢板用什么方法焊接</span></p><p><span style="font-size:16px">镀锌钢的焊接工艺</span><br style="box-sizing:border-box"><span style="font-size:16px">（1）手工电弧焊</span><br style="box-sizing:border-box"><span style="font-size:16px">1)焊前准备</span><br style="box-sizing:border-box"><span style="font-size:16px">为了降低焊接烟尘，防止焊接裂纹及气孔的产生，焊前除了开适当的坡口外，还应将坡口附近的锌层去除。去除方法可采用火焰烘烤或喷砂。坡口间隙应尽量控制在1.5～2mm内，工件厚度较大时，可放宽到2.5～3mm。</span><br style="box-sizing:border-box"><span style="font-size:16px">2)焊条的选择</span><br style="box-sizing:border-box"><span style="font-size:16px">焊条的选择原则是焊缝金属的力学性能尽量与母材相近，而且焊条熔敷金属中含硅量应控制在0.2％以下。</span><br style="box-sizing:border-box"><span style="font-size:16px">采用钛铁矿型焊条、氧化钛型焊条、纤维素型焊条、钛钙型焊条和低氢型焊条焊接时所得到的接头强度均可达到满意的指标，但用低氢型焊条和纤维素型焊条焊接的焊缝中易产生夹渣和气孔，因此一般不用。</span><br style="box-sizing:border-box"><span style="font-size:16px">对于低碳钢镀锌钢板，应优先选用J421/J422或J423焊条。对于强度等级在500MPa以上的镀锌钢板，可选用E5001、E5003等型号的焊条。对于强度在600MPa以上的镀锌钢板，应选用E6013、E5503及E5513等型号的焊条。</span><br style="box-sizing:border-box"></p><p><span style="font-size:16px">焊接时，尽量采用短弧，不要使电弧摆，以防止镀锌层熔化区域的扩大，保证工件的抗腐蚀性并降低烟尘量。</span></p><p><span style="font-size:16px">（2）熔化极气体保护焊</span><br style="box-sizing:border-box"><span style="font-size:16px">可采用CO2气体保护焊或者Ar+CO2、Ar+O2等混合气体保护焊进行焊接。保护气体对焊缝中Zn的含量有明显的影响，采用纯CO2或CO2+O2时，焊缝中Zn的含量较高，而采用Ar+CO2或Ar+O2时，焊缝中Zn的含量较低。电流对焊缝中Zn含量影响不大，随着焊接电流的增大，焊缝中的Zn含量稍有降低。</span><br style="box-sizing:border-box"><span style="font-size:16px">采用气体保护焊焊接镀锌钢时，焊接烟尘要比手工电弧焊大得多，因此应特别注意排风。影响烟尘量大小及成分的因素主要是电流和保护气体。电流越大，或保护气体中CO2或O2含量越大，焊接烟尘越大，而且烟尘中ZnO含量也增大，较大时ZnO的含量可达到70％左右。</span><br style="box-sizing:border-box"><span style="font-size:16px">在同样的焊接规范下，镀锌钢的熔深要比不镀锌的钢板大。T形接头、搭接接头及向下立焊的焊接气孔敏感性较大，焊接速度越大越易产生气孔；对于镀锌合金钢，焊接速度的影响尤其明显。多道焊时，后续焊道的气孔敏感性大于前一道。</span><br style="box-sizing:border-box"><span style="font-size:16px">采用不同保护气体焊接的镀锌钢接头的力学性能。可见，保护气体成分对接头力学性能并没有很大的影响，一般采用纯CO2进行焊接。</span></p><p><span style="font-size:16px">上述就是为您介绍的有关</span><span style="font-size:16px">镀锌钢板用什么方法焊接</span><span style="font-size:16px"></span><span style="font-size:16px">的内容，对此您还有什么不了解的，欢迎前来咨询我们网站，我们会有专业的人士为您讲解。</span></p><p><br></p><p><br></p><p></p><p style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0)"><span style="font-size:16px">关键词：&nbsp;&nbsp;</span><a href="http://www.ywyrzs.com/" style="text-decoration-line:none"><span style="font-size:16px">镀锌钢板</span></a><span style="font-size:16px">&nbsp;&nbsp;</span><a href="http://www.ywyrzs.com/" style="text-decoration-line:none"><span style="font-size:16px">氟碳彩钢板</span></a><span style="font-size:16px">&nbsp;&nbsp;</span><a href="http://www.ywyrzs.com/" style="text-decoration-line:none"><span style="font-size:16px">彩钢板</span></a></p><p style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0)"><span style="font-size:16px">编辑精选内容：</span></p><p style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0)"></p><p style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0)"><a href="http://www.ywyrzs.com/news-2/125.html" style="text-decoration-line:none"><span style="font-size:16px">【彩涂卷】彩涂卷的主要用途有哪些？</span></a></p><p style="-webkit-tap-highlight-color:rgba(0, 0, 0, 0)"><a href="http://www.ywyrzs.com/news-2/126.html" style="text-decoration-line:none"><span style="font-size:16px">【镀铝锌】热镀铝锌优点</span></a></p><p></p><span style="font-size:16px"></span><p></p><span style="font-size:16px"></span><p></p></div>
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