進行CTOD試驗的焊接工藝評定試板制備要點分析

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摘要： 文中對雙面焊的大厚試板焊接工藝評定試板的制備過程制定了指導(dǎo)說明。針對大厚試板的制備過程的各個環(huán)節(jié)提出了合理做法，并結(jié)合作業(yè)特點，設(shè)定了合理的作業(yè)順序，提高試板制備效率。針對熱影響區(qū)CTOD試樣容易出現(xiàn)無效試樣的情況，明確了在試板焊接時應(yīng)關(guān)注的操作要點，提高獲取熱影響區(qū)CTOD試樣的有效率。

關(guān)鍵詞：  焊接工藝評定試板制備；CTOD試板；大厚試板；試板焊接控制

中圖分類號：  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

服役年限長的大厚構(gòu)件的焊縫在一些標準中要求進行焊后熱處理的同時也允許在滿足相關(guān)要求時可免除焊后熱處理，其中，免除焊后熱處理的要求之一是在現(xiàn)場構(gòu)件所采用的焊接工藝的評定試驗中增加裂紋尖端張開位移（Crack Tip Opening Displacement，CTOD）試驗且試驗結(jié)果滿足相關(guān)要求，這種情況下，試板厚度的覆蓋要求較常規(guī)焊接工藝評定試驗的更為特殊（例如：DNV-OS-C401[2]中對于有CTOD試驗的焊接工藝的厚度覆蓋范圍為0.5t～1.1t（t為板厚）），焊接工藝評定試驗中的試板通常會很厚。（剩余4643字）