Analysis of CMT weld Clads for High-pressure die Casting Mold Restoration

J. Brezinová, M. Džupon, M. Vojtko, V. Puchý, O. Milkovič, J. Březina, P. Maruschak, A. Guzanová
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Abstract

The paper presents results of the research focused on the possibility of restoration of the shape parts of molds made of X15CrNiSi20-12 heat resistant austenitic chromium-nickel-stainless steel working in high-pressure die casting of aluminum alloys by clad welding. There were tested two welding wires - Thermanit 625 and Thermanit X, deposited on X15CrNiSi20-12 tool steel using cold metal transfer (CTM) welding in protective atmosphere of Ar. Two important properties of welded clads were tested - resistance of welds against dissolution in molten aluminum alloy AlSi8Cu3 and wear resistance of welds. Resistance of welds against dissolution were assessed by exposition of welded clads in aluminum melt for 120 and 300 minutes. The EDX semiquantitative microanalyses of element distribution were performed at the welding-melt interface, also build-ups were observed on the surface of welded clads. Wear resistance of the welded clads was tested using pin-on-disk test at room temperature. Results were compared to reference material - base tool steel X15CrNiSi20-12.
高压压铸模具修复用CMT焊层分析
本文介绍了高压压铸铝合金用X15CrNiSi20-12耐热奥氏体铬镍不锈钢复合焊修复模具形状零件的可能性的研究结果。在氩气保护气氛下,对X15CrNiSi20-12工具钢上沉积的两种焊丝Thermanit 625和Thermanit X进行了冷金属转移(CTM)焊接试验,测试了焊接层的两项重要性能——焊缝在AlSi8Cu3铝合金熔液中的耐溶解性和焊缝的耐磨性。通过在铝熔体中暴露焊层120分钟和300分钟来评估焊缝的抗溶解性。采用EDX半定量分析方法对熔液界面处的元素分布进行了分析,并在熔覆层表面观察到元素的堆积现象。采用针盘试验对焊接熔覆层的耐磨性进行了测试。结果与基准材料基工具钢X15CrNiSi20-12进行了比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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