1、H型鋼箱形梁埋弧焊焊接工藝1.1 整體組焊的焊縫包括焊接H型梁的角焊縫及箱形梁的 四條角焊縫。1.2 H 型梁及箱型梁角焊縫高度及坡口形式根據(jù)具體項(xiàng)目 的設(shè)計(jì)說明書在項(xiàng)目施工工藝中明確。同時(shí)要求焊接工程師 在焊工施焊前對(duì)焊接車間或班組進(jìn)行技術(shù)交底。1.3 H型鋼和箱型梁主角焊縫采用埋弧自動(dòng)焊，焊接前須將角焊縫兩側(cè)所有的毛刺、氧化皮、油污及其它附著物等清理干凈（清理范圍為焊縫兩側(cè)均不少于30mr）并清除定位焊的焊渣，注意焊縫坡口內(nèi)的浮銹及碎渣使用壓縮空氣吹除干1.4 H型鋼和箱型梁的主角焊縫焊接必須將桿件放在專用的45°焊接架上，進(jìn)行船形焊。焊架必須牢固、可靠2DIH/04/II 14

2、：291.5埋弧焊焊絲大小、材質(zhì)及焊劑材料的選用應(yīng)根據(jù)H型梁和箱型梁鋼板的材質(zhì)選用：H型梁/箱型梁材焊絲材質(zhì)焊絲直徑焊劑材料Q235H08A4SJ101Q235-Q345(16Mn)H08MnA4SJ101Q345(16Mn)H10Mn4SJ1011.6 采用埋弧焊焊接時(shí)，焊腳尺寸按下表焊接工藝參數(shù)選用：焊腳尺寸焊接電流電弧電壓焊接速度(mm)(A)(v)(m/min)第一層500-58025-300.48658063028380.45852065028380.451052065028380.451452065028380.451.6 埋弧焊、C02氣體保護(hù)焊根據(jù)焊腳尺寸其焊接工藝參數(shù) 見下表

3、：埋弧焊接工藝參數(shù)埋弧自動(dòng)焊角焊縫焊接工藝參數(shù)鋼板厚度（mn）鋼材材質(zhì)焊絲牌號(hào)焊絲直徑（mm焊劑牌號(hào)焊接電流（A）焊接電壓（V）焊接速度（cm/分）焊角高度（mm預(yù)熱溫度（C）厚度大于 30mm預(yù)熱溫度（C）6Q345BH10 Mn20 4.0SJ43158030300830-50100-1508Q345BH10 Mn20 5.0SJ43162032320830-50100-15010Q345BH10 Mn20 5.0SJ43164033310830-50100-15012Q345BH10 Mn20 5.0SJ43164032310830-50100-15010Q345BH10 Mn20 5.

4、0SJ431640332901030-50100-15012Q345BH10 Mn20 5.0SJ431640332901030-50100-15014Q345BH10 Mn20 5.0SJ431650332801030-50100-15016Q345BH10 Mn20 5.0SJ431650332801030-50100-15020Q345BH10 Mn20 5.0SJ431650332801030-50100-15014Q345BH10 Mn20 5.0SJ431670342601230-50100-15016Q345BH10 Mn20 5.0SJ431670342601230-50100

5、-15020Q345BH10 Mn20 5.0SJ431670342601230-50100-15014Q345BH10 Mn20 5.0SJ4316403332014 （第一遍）30-50100-150Q345BH10 Mn20 5.0SJ4316703430014 （第二遍）30-50100-15016Q345BH10 Mn20 5.0SJ4316403332014 （第一遍）30-50100-150Q345BH10 Mn20 5.0SJ4316703430014 （第二遍）30-50100-15020Q345BH10 Mn20 5.0SJ4316403332014 （第一遍）30-501

6、00-150Q345BH10 Mn20 5.0SJ4316703430014 （第二遍）30-50100-15020開破口Q345BH10 Mn20 5.0SJ4316403330014 （第一遍）30-50100-150Q345BH10 Mn20 5.0SJ4316703429014 （第二遍）30-50100-15022開破口Q345BH10 Mn20 5.0SJ4316403330014 （第一遍）30-50100-150Q345BH10 Mn20 5.0SJ4316703429014 （第二遍）30-50100-15025開破口Q345BH10 Mn20 5.0SJ4316403329

7、014 （第一遍）30-50100-150Q345BH10 Mn20 5.0SJ4316703428014 （第二遍）30-50100-15014Q345BH10 Mn20 5.0SJ4316403330016 （第一遍）30-50100-150Q345BH10 Mn20 5.0SJ4316703428016 （第二遍）30-50100-15016Q345BH10 Mn20 5.0SJ4316403330016 （第一遍）30-50100-150Q345BH10 Mn20 5.0SJ4316703428016 （第二遍）30-50100-15020Q345BH10 Mn20 5.0SJ4316

8、403330016 （第30-50100-150一遍）Q345BH10 Mn20 5.0SJ4316703428016 （第二遍）30-50100-15020開破Q345BH10 Mn20 5.0SJ4316403329016 （第一遍）30-50100-150口Q345BH10 Mn20 5.0SJ4316703427016 （第二遍）30-50100-15022開破Q345BH10 Mn20 5.0SJ4316403329016 （第一遍）30-50100-150口Q345BH10 Mn20 5.0SJ4316703427016 （第二遍）30-50100-15025開破Q345BH10 Mn20 5.0SJ4316403328016 （第一遍）30-50100-150口Q34