Q345H型钢已在建筑及桥梁等领域获得越来越广泛的应用，特别是随着建筑领域轻钢结构的发展，对Q345H型钢的需求更为迫切。

　　在现有技术中，大型H型钢的生产方法有两种，一是热轧，一个钢坯或板坯轧成一根H型钢，长度有限，不能连续生产，二是焊接，由较 厚的钢板焊接而成，通常采用埋弧焊焊接，效率非常低。对于轻型H型钢，由于壁薄，不能采用热轧方式生产，只能采用焊接方式生产，典型 的焊接Q345H型钢是采用二氧化碳气体保护焊生产(如中国专利 98206807.7和97243388.0)，采用单片间断的焊接方式，其生产成本高， 且效率和产量低。

　　目的在于提供一种生产效率高、成本低的Q345H型钢的连续焊接生产方法。

　　MUDE，BENFAMINGYIYONGZUOQ345HXINGGANGYIBANDEDAIGANGHEYONGZUOQINGXINGHXINGGANGFUBANDEDAIGANGWEIYUANLIAO，PINZHUANGCHENGHXINGGANGXINGZHUANGDINGWEI，CAIYONGGAOPINHANJIEFANGFA， LIANXUSHENGCHANQ345HXINGGANG。QIJUTIDEGONGYILIUCHENGBAOKUODAIGANGKAIJUAN、DAIGANGJIAOZHI、JIAN QIEDUIHAN、HUOTAOCUNCHU、FUBANDUNBIAN、YUZULI、GAOPINHANJIE、KUAISULENGQUE、JIAOZHIQIAN YIN、DINGCHIJIANQIE。XIANFENSHURUXIA：

　　1、DAIGANGKAIJUAN1、JIAOZHI2HEJIANQIEDUIHAN3

　　JIANGLIANGGEYONGZUOQ345HXINGGANGYIBANHEYIGEYONGZUOQ345HXINGGANGFUBANDEDAIGANGGANGJUANFENBIEZAISANTIAOSHENGCHANXIANSHANGDEKAIJUANJISHANGKAIJUAN，KAIJUANHOUZAIGEZIJINRUJIAOZHIJIJIAOZHI， SUIHOUZAIJINRUJIANQIEDUIHANJI，JIANGQIANHOULIANGGEDAIGANGDETOUWEIQIECHU，ZAIDUIHANHANJIE，SHIQIANHOULIANGGEDAIGANGPINGHUADELIANJIEQILAI。

　　2、HUOTAOCUNCHU4、5

　　JINGKAIJUAN1、JIAOZHI2HEJIANQIEDUIHAN3DELIANGTIAOYIBANDAIGANGHEYITIAOFUBANDAIGANGFENBIEJINRUHUOTAOCUNCHU4HE5，CUNCHUQILAI，QIHUOTAOKEWEIWOSHIHUOTAOHUOLISHIHUOTAOZHONGRENYIZHONG。

　　3、FUBANDUNBIAN6

　　ZUOWEIFUBANDEDAIGANGZAICHUHUOTAOHOU，JIHANJIEQIANYAOJINRUDUNBIANZHUANGZHIJINXINGDUNBIAN， DUNBIANYALIWEI500～8000Kgf，DUNBIANDEMUDESHISHIFUBANBIANBUGENGZHENGQIYIZHI，SHIZHI YULIANGGEYIBANZUHESHI，YUYIBANJIECHUGENGYANSHI，LINGWAIYESHIFUBANBIANBUJIAHOU，ZAIYUYIBANGAOPINHANJIEHOU，HANFENGGENGFENGMAN，KETIGAOHANFENGJINSHUQIANGDU，CONGERYETIGAOHXINGGANGDEZHENGTIQIANGDUHEZHILIANG。

　　4、YUZULI7

　　JINGDUNBIAN6HOUDEFUBANDAIGANGCHUDUNBIANZHUANGZHIHOUJINRUYUZULIJI，ERLIANGTIAOYIBANDAI GANGCHUHUOTAOHOUYEYUFUBANDAIGANGTONGSHIYIBINGJINRUYUZULIJI，SANTIAODAIGANGZAIYUZULIJI ZHONGJINXINGYUZULI，PINZHUANGCHENGHXINGGANGDEXINGZHUANG，WEISHIXINGZHUANGDINGWEI，LIANGZHONGDAIGANGZHIJIANCHUYUWEIZHANGLIZHUANGTAI，WEIZHANGLIWEI50～1000Kgf。