Optimization of Welding Parameters for Small-Scale Resistance Spot Welding of Zirconium Alloys; Materials Science Forum; Vol. 970 : Modern Problems in Materials Processing, Manufacturing, Testing and Quality Assurance II

التفاصيل البيبلوغرافية
Parent link:	Materials Science Forum: Scientific Journal Vol. 970 : Modern Problems in Materials Processing, Manufacturing, Testing and Quality Assurance II.— 2019.— [P. 145-152]
المؤلف الرئيسي:	Slobodyan M. S. Mikhail Stepanovich
مؤلفون مشاركون:	Национальный исследовательский Томский политехнический университет Инженерная школа неразрушающего контроля и безопасности Отделение электронной инженерии, Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Отделение материаловедения
مؤلفون آخرون:	Kiselev A. S. Aleksey Sergeevich
الملخص:	Title screen This paper presents the results of optimization of parameters for resistance spot welding of parts made of E110 zirconium alloy with a thickness of 0.25+0.25 mm. Its purpose was to determine the influence of welding current profiles on nugget metal structure and mechanical properties of welds. The highest tensile strength comparable with base metal (380...440 MPa) was observed when the ratio of integral heat input to current pulse duration was about two. Formation of martensitic structure and coarsening of nugget metal was observed with larger ratios. A proper fusion zone was not formed with lower ratios. Annealing of welded joints at a pressure of ~ 10{-4} Pa and a temperature of 580 °C for one hour was necessary to reduce residual stresses and transformation of metastable martensitic phase to a more stable state. This reduced microhardness of nugget metal by 30...35% and increased tensile strength of welds. It was also possible to increase tensile strength and reduce dispersion of its values by increasing duration of current down slope after formation of a nugget. An increase in duration from 1 to 14 ms caused rise in tensile strength by ~ 18% and dispersion of its values by ~ 3%. Режим доступа: по договору с организацией-держателем ресурса
اللغة:	الإنجليزية
منشور في:	2019
الموضوعات:	электронный ресурс труды учёных ТПУ Optimization Small-Scale Resistance Spot Welding Welding Parameters Zirconium Alloys оптимизация точечная сварка параметры циркониевые сплавы
الوصول للمادة أونلاين:	https://doi.org/10.4028/www.scientific.net/MSF.970.145
التنسيق:	الكتروني فصل الكتاب
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=660928