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这时候为了使铸件能够达到使用标准,减少损失浪费,往往会对缺陷进行修复。常用的修补设备为氩弧焊机、电阻焊机、冷焊机等。对于质量与外观要求不高的铸件缺陷可以用氩弧焊机等发热量大、速度快的焊机来修补。但在精密铸件缺陷修补领域,由于氩焊热影响大,修补时会造成铸件变形、硬度降低、砂眼、局部退火、开裂、针孔、磨损、划伤、咬边、或者是结合力不够及内应力损伤等二次缺陷。冷焊机正好克服了以上缺点,其优点主要表现在热影响区域小,铸件无需预热,常温冷焊修补,因而无变形、咬边和残余应力,不会产生局部退火,不改变铸件的金属组织状态?</p> <p>       因而冷焊机适用于精密铸件的表面缺陷修补。冷焊的焊补范围为?.5-Φ1.2mm焊补点反复熔化堆积的过程,在大面积缺陷修补过程中,修复效率是制约其广泛推广应用因素。对于大缺陷,推荐传统焊补工艺与铸造缺陷修补机的复合应用。在选择冷焊机时,也要选择具有操作简单、焊补效率高、焊后强度高,焊后抛丸清理、机械加工不脱落等优势的设备。选择这样的冷焊机,焊补修补打磨后,完全看不出来修复痕迹?</p> <p> <br /> </p></p> </div> <div class="pagess"> <ul><div>上一?<a href="321.html">【推荐】浇铸的简单概述_铸件浇筑前的准备工作</a></div> <div>下一?<a href="319.html">【推荐】低压浇铸过程中常见的问题_压铸工艺特点</a></div> </ul> </div> <div class="info_key">相关标签?/div> </div> <div class="clear"></div> <div class="cateslist"> <dl> <dt>相关产品</dt> <dd> <div class="img"> <a href="/supply/22.html" title="自来水工程阀? rel="nofollow"><img src="http://cmsimgshow.zhuchao.cc/30636/201709211104042203063624435.jpg" title="自来水工程阀? alt="自来水工程阀?/></a> </div> <div class="txt"> <a href="/supply/22.html" 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