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<h1 class="h1">柴发机组零件修复——热焊和冷焊</span></h1>
<div class="text">发布来源：康柴（深圳）电力技术有限公司　　发布日期: 2025-07-26　　访问量:351</div>
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<p>柴油发电机组铸铁件的焊补，详细用于裂痕、破断、磨耗、因铸造时产生气孔、熔渣杂质等缺点的维修。焊补的铸铁主要是灰铸铁，而白口铁则很少运用。铸铁件的焊补分为热焊和冷焊两种，需根据外形<a href="http://www.gdkmsfdj.com" target="_blank">发电机十大名牌</a>、强度<a href="http://www.gdkmsfdj.com" target="_blank">柴油机故障灯图解大全大图</a>、加工性、工作环境、现场因素等特征进行购买。下面由发电机公司——深圳康明斯发电设备销售中心为大家技术优化下热焊和冷焊的特性。</p><p>一、热焊它是焊前对工件领先行发烫预热，焊后加热、保温、缓冷。用气焊和电弧焊均可达到满意的效果。焊前预热600℃以上，焊接步骤中不低于500℃，焊后缓冷，工件温度均匀，焊缝与工件其他部位之间的温差小，有利于石墨析出，防止白口、裂纹和气孔。热焊的焊缝与基体的金相组织基本相同，焊后机加工容易，焊缝强度高、耐压小、密封性好。特别适用于铸铁件毛坯或机加工程序中发现形状复杂的基体缺点修理，也适合于精度要求太高或焊后可通过机加工修整达到精度要求的铸铁件。但是，热焊需要加热装置和保温炉，劳动要素差，周期长，整体预热变形较大，长时间发热加热氧化严重，对大型铸件来说，运用受到一定限制。主要用于小型或个别有特殊要求的铸件焊补。</p><p>二、冷焊冷焊是不对铸件预热或其预热温度低 400℃的情形下进行，一般采用手工电弧焊或半自动电弧焊。冷焊操作步骤简便，劳动条件好，施焊的时问较短，具有更大的运用范围，一般铸铁件多采用冷焊。</p><p>冷焊时要根据不同的焊补厚度购买焊条的直径，按照焊条直径购买焊补规范，包括电流强度、焊条类型、电源性质、电弧长度等，使焊缝得到适当的组织和性能，减小焊后加工时的应力影响。冷焊要有较高的焊接技术，为保证焊补品质，需要采取一系列工艺办法，尽量降低输入基体的热量，减轻热变形，预防气孔、裂痕和H LI等弊端。</p><p>主用的国产铸铁冷焊条有氧化型钢芯铸铁焊条（ Z100）、高钒铸铁焊条（2116和Z117）、纯镍铸铁焊条（Z308）、镍铁铸铁焊条（Z408）、镍铜铸铁焊条（Z508）、铜铁铸铁焊条（Z607和Z612）以及奥氏体铸铜焊条等，它们可按需要分别选型，见表2-3.</p><p>以上是由发电机服务中心——深圳康明斯发电装备工厂为大家专业技巧下热焊和冷焊的特性，希望对大家有帮助。康明斯发电机公司创始于1974年，是专业的柴油发电机组生产厂商。公司自1992年开始，一直为“国家内燃机发电机组品质监督检查中心”检查合格的发电机组制造厂商<a href="http://www.gdkmsfdj.com" target="_blank">康明斯发电机生产厂家</a>，拥有精湛的研发技术实力、完善的检测装备、精细的生产工艺、完善的质量管理体系、专业的制造技术。在全国设有64个销售服务部，随时为用户提供规划、供应、调试、修理一条龙服务。全国服务热线：</p></div><a href="http://www.gdkmsfdj.com/" target="_blank">http://www.gdkmsfdj.com</a>
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