43 湖南省地方标准 ICS CCS 91.060 Q 73 DB43/T2526—2022 发 布 湖南省市场监督管理局2022-1 2发布-09 2023-03实施-09大型钢结构件焊接技术规范 Technical specifications for welding of large-sized steel structure DB43/T 2526—2022 I 目 次 前言 ································ ································ ································ ························ Ⅲ 1 范围 ································ ································ ································ ····················· 1 2 规范性引用文件 ································ ································ ································ ······ 1 3 术语和定义 ································ ································ ································ ············ 2 4 焊接工艺 ································ ································ ································ ··············· 2 4.1 工艺规程 ································ ································ ································ ············ 2 4.2 工艺评定 ································ ································ ································ ············ 2 5 焊材选择 ································ ································ ································ ··············· 3 6 焊前准备 ································ ································ ································ ··············· 4 6.1 下料 ································ ································ ································ ··············· 4 6.2 坡口 ································ ································ ································ ··············· 5 6.3 焊接设施设备 ································ ································ ································ ··· 5 6.4 焊接环境 ································ ································ ································ ········· 5 6.5 其它要求 ································ ································ ································ ········· 5 7 过程要求 ································ ································ ································ ··············· 5 7.1 定位焊 ································ ································ ································ ············ 5 7.2 预热 ································ ································ ································ ··············· 5 7.3 焊接 ································ ································ ································ ··············· 6 7.4 后热处理 ································ ································ ································ ········· 7 7.5 焊后热处理 ································ ································ ································ ······ 7 7.6 焊后检验 ································ ································ ································ ········· 7 7.7 焊接返修 ································ ································ ································ ········· 8 7.8 变形的校正 ································ ································ ································ ······ 8 8 质量控制 ································ ································ ································ ··············· 8 9 记录与保存 ································ ································ ································ ············ 8 附录A（资料性） 钢结构焊接坡口的形式和尺寸 ································ ···························· 10 A.1 焊条电弧焊全焊透坡口形式和尺寸 ································ ································ ······ 10 A.2 气体保护焊全焊透坡口形式和尺寸 ································ ································ ······ 12 A.3 埋弧焊全焊透坡口形式和尺寸 ································ ································ ············ 14 A.4 焊条电弧焊部分焊透坡口形式和尺寸 ································ ································ ··· 17 A.5 气体保护焊部分焊透坡口形式和尺寸 ································ ································ ··· 20 A.6 埋弧焊部分焊透坡口形式和尺寸 ···························