High-Mn and high-Nb anti-crack-defect nickel-based welding wire and welding method
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A welding method and anti-crack technology, applied in the direction of welding equipment, welding medium, welding equipment, etc., can solve problems such as defects, easy cracks, high Mn, high Nb anti-cracks, etc., and achieve good forming, good wire feeding performance, and no floating Slag effect
Active Publication Date: 2016-03-16
HARBIN WELDING INST LTD +2
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[0003] The object of the present invention is to provide a high Mn and high Nb anti-crack defect nickel-based welding wire which is suitable for the welding of the
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Embodiment 1
[0016] In Example 1, the master alloy steel ingot was forged and rolled, and then subjected to multiple passes of cold drawing and on-line annealing. After cleaning, a welding wire was finally formed, and the chemical composition of the welding wire was finally C: 0.024%, Si: 0.18%. Mn: 3.96%, S: <0.003%, P: <0.003%, Cr: 29.75%, Mo: 0.03%, Cu: <0.05%, Nb: 2.37%, Mn+Nb: 6.2-6.6%, Ti: 0.55%, Al: 0.18%, Fe: 9.00%, Ca: <0.005%, Mg: <0.005%, O: <0.005%, N: 0.29%, B: <0.001%, Zr: <0.005%, Ta: <0.02%, Ni is the balance.
Embodiment 2
[0017] In Example 2, the master alloy steel ingot was forged and rolled, and then subjected to multiple passes of cold drawing and on-line annealing. After cleaning, a welding wire was finally formed, and the chemical composition of the welding wire was finally C: 0.02, 3%, Si: 0.16 %, Mn: 4.01%, S: <0.003%, P: <0.003%, Cr: 29.62%, Mo: 0.03%, Cu: <0.05%, Nb: 2.40%, Ti: 0.50%, Al: 0.19%, Fe: 8.36%, Ca: <0.005%, Mg: <0.005%, O: <0.005%, N: 0.28%, B: <0.001%, Zr: <0.005%, Ta: <0.02%, Ni is the balance.
[0018] In the present invention, the welding wire can be smelted and produced in a vacuum induction furnace, or can be smelted and produced in an electric furnace plus an out-of-furnace refining method, as long as the final chemical composition of the welding wire can meet the requirements of the above invention.
[0019] In order to verify the effect of the present invention, the following two embodiments are compared with three comparative examples.
[0020] Table 1 shows the basic ch...
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Abstract
The invention provides a high-Mn and high-Nb anti-crack-defect nickel-based welding wire and a welding method. The high-Mn and high-Nb anti-crack-defect nickel-based welding wire comprises, by weight, less than 0.04% of C, 0.10-0.20% of Si, 3.8-4.2% of Mn, less than 0.003% of S, less than 0.003% of P, 28.0-31.5% of Cr, less than 0.01% of Mo, less than 0.05% of Cu, 2.2-2.5% of Nb, 0.4-0.9% of Ti, less than 0.50% of Al, 8.5-10.5% of Fe, less than 0.005%of Ca, less than 0.005% of Mg, less than 0.005% of O, 0.20-0.40% of N, less than 0.001% of B, less than 0.005% of Zr, less than 0.02% of Ta, and the balance of Ni, wherein the sum of the Mn and Nb is 6.2-6.6%; the sum of other impurity elements is less than 0.10%. The welding wire is suitable for welding of nuclear island main equipment (including bead welding of pressure vessel drive tube sockets, connection tube safety ends, reactor core bearing blocks and steam generator tube plates and welding of tubes and tube plates), and the problem that an existing welding wire is prone to having a crack defect under the field welding and other severe conditions is solved.
Description
Technical field [0001] The invention relates to a welding wire, specifically a nickel-based welding wire. Background technique [0002] In the 1950s, the original steam generator used Inconel600 alloy as the heat transfer tube material, so the tube sheet was welded with ERNiCr-3 welding material (Inconel82), and ERNiCr-3 welding material was also used for heat transfer tube and stacking. Welding of the solder layer. But then intergranular stress corrosion cracking (IGSCC) was found in the above welds, so we started to develop new heat transfer tube materials. After a period of research, Inconel690 alloy was used as the heat transfer tube material in the 1980s. And use ERNiCrFe-7 (Inconel52) welding material for surfacing and welding. The chromium content of this material reaches about 30%, so the occurrence of intergranular stress corrosion cracks is effectively avoided. But in recent years, the U.S. Navy has discovered a defect called DDC in the weld of Inconel52. Later, aft...
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