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Old 05-13-2011, 10:38 AM   #1
qdsk84pdyq
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Default |清大圣科气化炉反骗子.|焊前对焊件接口处预热

焊接时形成的连接两个被连接体的接缝称为焊缝。××清大圣科×清大圣 科电焊条×清大圣科电焊条设备×清大金桥×清大金桥电焊条设备&ti mes;清大圣科气化炉×www.qhsk.cn×清大圣科科技有限公司&tim es;×焊缝的两侧在焊接时会受到焊接热作用,而发生组织和性能变化,这一区域被称为热影响区 。××清大圣科×清大圣科电焊条×清大圣科电焊条设备& times;清大金桥×清大金桥电焊条设备×清大圣科气化炉×www .qhsk.cn×清大圣科科技有限公司××
钎焊是使用比工件熔点低的金属材料作钎料,将工件和钎料加热到高于钎料熔点、低于工件熔点的温度,利用液态 钎料润湿工件,填充接口间隙并与工件实现原子间的相互扩散,从而实现焊接的方法。×&time s;清大圣科×清大圣科电焊条×清大圣科电焊条设备×清大金桥&ti mes;清大金桥电焊条设备×清大圣科气化炉×www.qhsk.cn&time s;清大圣科科技有限公司××   
这就需要调整焊接条件,焊前对焊件接口处预热、焊时保温和焊后热处理可以改善焊件的焊接质量。&times ;×清大圣科×清大圣科电焊条×清大圣科电焊条设备×清 大金桥×清大金桥电焊条设备×清大圣科气化炉×www.qhsk.c n×清大圣科科技有限公司××
多数压焊方法如扩散焊、高频焊、冷压焊等都没有熔化过程,因而没有象熔焊那样的有益合金元素烧损,和有害元 素侵入焊缝的问题,从而简化了焊接过程,也改善了焊接安全卫生条件。××清大圣科 ×清大圣科电焊条×清大圣科电焊条设备×清大金桥×清大 金桥电焊条设备×清大圣科气化炉×www.qhsk.cn×清大圣科 科技有限公司××
焊接时因工件材料焊接材料、焊接电流等不同,焊后在焊缝和热影响区可能产生过热、脆化、淬硬或软化现象,也 使焊件性能下降,恶化焊接性。××清大圣科×清大圣科电焊条&tim es;清大圣科电焊条设备×清大金桥×清大金桥电焊条设备×清大圣科 气化炉×www.qhsk.cn×清大圣科科技有限公司×&time s;
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