不锈钢复合板的焊接工艺附加评定方法探讨..docVIP

不锈钢复合板的焊接工艺附加评定方法探讨 摘 要：不锈钢复合板需要增加项目如晶间腐蚀，焊接工艺iscussion for Supplementary Welding Procedure Qualification of Stainless Steel Clad Plate Abstract: When stainless steel clad plate need to add welding procedure qualification item (such as chemical composition analysis or susceptibility to intergranular corrosion inspection),current welding procedure qualification standard was not applicable,so this paper used Welding Process Additional Evaluation in the concept of NB/T 47014-2011 Welding Procedure Qualification for Pressure Equipment,according to the characteristics and welding process of stainless steel clad plates, for chemical composition and susceptibility to intergranular corrosion, Around the evaluation scope, evaluation conditions, evaluation factors, evaluation rules, assessment method and form of test sample and size, inspection requirements and result evaluation,aimed as a discussion, put forward the method for supplementary welding procedure qualification. Key Words: Stainless Steel;Clad Plate;Chemical composition;Susceptibility to intergranular corrosion;Method for supplementary welding procedure qualification 前言 在现行焊接工艺评定标准NB/T 47014—2011《承压设备焊接工艺评定》中，焊接工艺焊接接头力学性能准则评定焊接工艺。的评定规则。当按照焊接接头力学性能准则评定焊接工艺时，如果产品有其他使用性能要求，则由焊接工艺人员按照理论知识和科学实验结果来选择条件并规定焊接工艺适用范围规定要求规定有要求评定方法，取得的认可。焊接接头的使用性能要求由焊缝的焊接工艺来决定，因此焊接工艺评定是焊缝对接焊缝试件评定合格的焊接工艺亦适用于角焊缝 a b c 图1 焊接工艺附加评定试件形式与尺寸示意图 （图中a.单条焊缝试件，b. T字形焊缝试件，c. 十字形交叉焊缝试件） 图2 焊接工艺附加评定试件焊缝断面形式示意图 （图中1.基层焊缝，2.过渡层焊缝，3.覆层焊缝） 检验要求与结果评定 对于焊接工艺附加评定试件的检验包括外观检查和无损检测，对试样的检验包括化学成分测定和晶间腐蚀敏感性检验。 外观检查不得有裂纹；无损检测按照NB/T 47014—2011的规定执行按照的规定执行压力容器产品焊接的基础质量是焊接接的使用性能和焊接缺陷，当进行时，的化学成分是保证耐蚀性能的基础耐蚀