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| Discussion on influencing factors of harmful intermetallic phase measurement in welding material 2209 |
| LIU Manyu1,2, GUO Xiao2, WANG Qingjiang1,2, HU Xiaobo1,2, MA Jianzhao1,2, ZHANG Biying1,2 |
1. Harbin Well Welding Co., Ltd., Harbin 150028, China;
2. Harbin Welding Research Institute Co., Ltd., Harbin 150028, China |
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Abstract The method C in ASTM A923-2014 for the detection of harmful intermetallic phases in dual phase steel (Standard Test Methods for Detecting Detrimental Intermetallic Phase in Duplex Austenitic/Ferritic Stainless Steels) does not clearly specify the sampling location and size of welding materials. Through the discussion of sampling method, sample preparation method, composition gradient rule at different positions from the fusion line and measurement factors affected by different weld bead heat, the influence of the above factors on harmful intermetallic phases of deposited metal in 2209 automatic TIG welding was investigated by optical microscope (OM), spark discharge atomic emission spectrometry and energy disperse spectroscopy (EDS). The results showed that the nitrogen element value and ferrite content were the important factors influencing the harmful intermetallic phase. After wet grinding using abrasive paper (>6.5 μm) and alcohol. The sampling in a single pass and more than 7 mm away from the fusion line could fairly and objectively evaluate the harmful intermetallic phase in dual-phase steel 2209.
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Received: 07 November 2022
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2023, Vol. 41 
