ICS23.060.01J16备案号：32095—2011中华人民共和国机械行业标准JB/T6438—2011代替JB/T6438—1992阀门密封面等离子弧堆焊技术要求Technicalrequirementsforplasmaarcoverlayingweldingforvalvesealingsurface2011-05-18发布2011-08-01实施中华人民共和国工业和信息化部发布JB/T6438—2011I目次前言....................................................................................................................................................................III1范围................................................................................................................................................................12规范性引用文件............................................................................................................................................13焊工资质........................................................................................................................................................14堆焊材料........................................................................................................................................................15工艺评定........................................................................................................................................................26堆焊工艺........................................................................................................................................................26.1堆焊基面（工艺平台）尺寸.....................................................................................................................26.2对焊件要求.................................................................................................................................................26.3焊前预热.....................................................................................................................................................26.4焊前检查..............................................................................................................
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