Kalabis Jarosław, Kowalski Aleksander, Topolska Santina
Center of Advanced Materials Technologies, Łukasiewicz Research Network-Institute of Non-Ferrous Metals, 44-100 Gliwice, Poland.
Department of Welding, Silesian University of Technology, 44-100 Gliwice, Poland.
Materials (Basel). 2023 Sep 13;16(18):6199. doi: 10.3390/ma16186199.
This paper presents the influence of the Hot Isostatic Pressing (HIP) process on the structure, mechanical properties and corrosion resistance of padding welds made using the TIG method from aluminium bronzes-CuAl7 and CuAl2 (a composite bundled wire). The tested CuAl7 material was a commercial welding wire, while the CuAl2 composite was an experimental one (a prototype of the material produced in multiwire technology). The wire contains a bundle of component materials-in this case, copper in the form of a tube and aluminium in the form of rods. The padding welds were manufactured for both the CuAl7 wire and the CuAl2 multiwire. The prepared samples were subjected to the Hot Isostatic Pressing (HIP) process, chemical composition tests were performed, and then the samples were subjected to observations using light microscopy, Vickers hardness testing, electrical conductivity tests, and apparent density determination using Archimedes' Principle. Tribological tests (the 'pin on disc' method) and neutral salt spray corrosion tests were conducted. The padding weld made of CuAl2 multifiber material subjected to the HIP process is characterized by an improvement in density of 0.01 g/cm; a homogenization of the hardness results across the sample was also observed. The average hardness of the sample after the HIP process decreased by about 15HV, however, the standard deviation also decreased by about 8HV. The electrical conductivity of the CuAl2 welded sample increased from 16.35 MS/m to 17.49 MS/m for the CuAl2 sample after the HIP process. As a result of this process, a visible increase in electrical conductivity was observed in the case of the wall made of the CuAl2 multiwire-an increase of 1.14 MS/m.
本文介绍了热等静压（HIP）工艺对采用钨极惰性气体保护焊（TIG）方法用铝青铜-CuAl7和CuAl2（复合捆扎丝）制成的填充焊缝的组织、力学性能和耐腐蚀性的影响。测试的CuAl7材料是一种商用焊丝，而CuAl2复合材料是一种实验材料（多丝技术生产的材料原型）。该焊丝包含一束组成材料，在这种情况下，是管状铜和棒状铝。对CuAl7焊丝和CuAl2多丝都进行了填充焊缝的制造。对制备的样品进行了热等静压（HIP）工艺处理、化学成分测试，然后对样品进行了光学显微镜观察、维氏硬度测试、电导率测试以及使用阿基米德原理测定表观密度。进行了摩擦学测试（“销盘”法）和中性盐雾腐蚀测试。经过HIP工艺处理的由CuAl2多纤维材料制成的填充焊缝的特点是密度提高了0.01 g/cm³；还观察到整个样品的硬度结果均匀化。经过HIP工艺处理后样品的平均硬度下降了约15HV，然而，标准偏差也下降了约8HV。经过HIP工艺处理后，CuAl2焊接样品的电导率从16.35 MS/m增加到17.49 MS/m。由于这个工艺，在由CuAl2多丝制成的壁的情况下观察到电导率有明显增加——增加了1.14 MS/m。
