进行CTOD试验的焊接工艺评定试板制备要点分析

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摘要： 文中对双面焊的大厚试板焊接工艺评定试板的制备过程制定了指导说明。针对大厚试板的制备过程的各个环节提出了合理做法，并结合作业特点，设定了合理的作业顺序，提高试板制备效率。针对热影响区CTOD试样容易出现无效试样的情况，明确了在试板焊接时应关注的操作要点，提高获取热影响区CTOD试样的有效率。

关键词：  焊接工艺评定试板制备；CTOD试板；大厚试板；试板焊接控制

中图分类号：  TG 47

Analysis of Key Points in Preparation of Welding Procedure Qualification

Test Coupons for CTOD Test

Wang Shida，Zhu Yongqiang，Liu Dawei

（Penglai Jutal Offshore Engineering Heavy Industries Co.，Ltd.，Penglai 265607，Shandong，China）

Abstract： This article provides guidance on the control of the welding process for double-sided welded large thickness test coupons. Reasonable methods have been proposed for each stage of the preparation of large thickness test coupon， and a reasonable operation sequence has been set based on the characteristics of the operation to improve the efficiency of test coupon preparation. In response to the situation where HAZ CTOD specimens are prone to invalid specimens， the operational points that should be paid attention to when welding the test coupon were clarified to improve the efficiency of obtaining HAZ CTOD specimens.

Key words：  preparation of welding procedure qualification test coupons; coupon for CTOD specimen; large thickness test coupon; test coupons welding control

0前言

服役年限长的大厚构件的焊缝在一些标准中要求进行焊后热处理的同时也允许在满足相关要求时可免除焊后热处理，其中，免除焊后热处理的要求之一是在现场构件所采用的焊接工艺的评定试验中增加裂纹尖端张开位移（Crack Tip Opening Displacement，CTOD）试验且试验结果满足相关要求，这种情况下，试板厚度的覆盖要求较常规焊接工艺评定试验的更为特殊（例如：DNV-OS-C401[2]中对于有CTOD试验的焊接工艺的厚度覆盖范围为0.5t～1.1t（t为板厚）），焊接工艺评定试验中的试板通常会很厚。（剩余4643字）