|清大圣科气化炉反骗子.|大型低温储罐焊接技术获成功

　　但由于大型LNG低温储罐9Ni钢的焊接，材质特殊，在焊接过程中出现磁化、淬裂，磁偏吹现象普遍，焊 接成型后焊缝产生裂纹，焊接操作难度大，一直以来影响着施工质量。××清大圣科& times;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××
为攻克这一技术难题，科研人员针对9Ni钢的焊接难点进行了国产和进口9Ni钢钨极氩弧焊、焊条电弧焊、埋 弧焊和气保焊的焊接工艺研究，总结建立了16万m3 LNG储罐用9Ni钢的焊接施工技术。××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×& times;
它的空载电压为60～100伏，工作电压为25～45伏特，输出电流为50～1000安。×& 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.cn& times;清大圣科科技有限公司××手工电弧焊时，弧长常发生变化 工艺流程，引起焊接电压变化。××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;
焊接机头：它的作用是将焊接能源设备输出的能量转换成焊接热，并不断送进焊接材料，同时机头自身向前移动， 实现焊接。××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&times ;www.qhsk.cn×清大圣科科技有限公司××手工电弧焊用的 电焊钳，随电焊条的熔化，须不断手动向下送进电焊条，并向前移动形成焊缝。××清 大圣科×清大圣科电焊条×清大圣科电焊条设备×清大金桥&times ;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××自动焊机有自动送进焊丝机构，并有机头行走机构使机头向前 移动。××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×w ww.qhsk.cn×清大圣科科技有限公司××
经过60多次焊接试验，得到合格的焊接工艺评定15项，覆盖了大型低温储罐罐体焊接所需要的全部厚度。&t imes;×清大圣科×清大圣科电焊条×清大圣科电焊条设备&tim es;清大金桥×清大金桥电焊条设备×清大圣科气化炉×www.qh sk.cn×清大圣科科技有限公司××
弧焊电源一般有弧焊变压器、直流弧焊发电机和弧焊整流器。××清大圣科&time s;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××弧焊变压器提供的是交流电，应用较广。××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××直流弧焊发电机提供直流电，制造较复杂，消耗材料较多且效率较 低，有渐被弧焊整流器取代的趋势。××清大圣科×清大圣科电焊条&t imes;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×&ti mes;
由于天然气由气态变为-162℃液态后，具有无味、无毒、无腐蚀、安全风险小及运输方便等优点，因此用大型低温储罐储存LNG具有 广阔的前景。××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&time s;www.qhsk.cn×清大圣科科技有限公司××
经过中国石油第二建设公司科研人员历时15个月的技术攻关，“大型LNG(液化天然气)低温储罐用9Ni钢 的焊接技术研发”科研项目于近日顺利通过了兰州石化公司的验收，这标志着中油二建在大型液化天然气低温储罐 制造焊接技术中取得新突破。××清大圣科×清大圣科电焊条&time s;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×&times ;
弧焊整流器是20世纪50年代发展起来的直流弧焊电源，采用硅二极管或可控硅作整流器。×&t imes;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&t imes;清大圣科科技有限公司××60年代出现的用大功率晶体管组成的晶体管式 弧焊电源，能获得较高的控制精度和优良的性能，但成本较高。××清大圣科&tim es;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××
常用的有小车式和悬挂式机头两种。××清大圣科×清大圣科电焊条&t imes;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×&ti mes;电阻点焊和凸焊的焊接机头是电极及其加压机构，用以对工件施加压力和通电。×&tim es;清大圣科×清大圣科电焊条×清大圣科电焊条设备×清大金桥&t imes;清大金桥电焊条设备×清大圣科气化炉×www.qhsk.cn&tim es;清大圣科科技有限公司××缝焊另有传动机构，以带动工件移动。&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××对焊时需要有静、动夹具和夹具夹紧机构 ，以及移动夹具 焊接设备和顶锻机构。××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& times;www.qhsk.cn×清大圣科科技有限公司××
为使焊接电流稳定，所用弧焊电源的外特性应是陡降的，即随着输出电压的变化，输出电流的变化应很小。&ti mes;×清大圣科×清大圣科电焊条×清大圣科电焊条设备&time s;清大金桥×清大金桥电焊条设备×清大圣科气化炉×www.qhs k.cn×清大圣科科技有限公司××熔化极气体保护电弧焊和埋弧焊可 采用平特性电源，它的输出电压在电流变化时变化很小。××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& times;×
电阻焊的焊接能源设备中较简单的是电阻焊变压器，空载电压范围为1～36伏，电流从几千到几万安。&tim es;×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××配用这种焊接能源设备的焊机称为交 流电阻焊机。××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&time s;www.qhsk.cn×清大圣科科技有限公司××其他还有低频 电阻焊机、直流脉冲电阻焊机、电容储能电阻焊机和次级整流电阻焊机。××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×× 　　
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