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Material Technological Concepts for Diffusion Bonding of Titanium-Steel- and Magnesium-Steel-Joints

钛钢、镁钢接头扩散连接的材料技术概念

基本信息

批准号：
180583184
负责人：
Professor Dr.-Ing. Wolfgang Tillmann
金额：
--
依托单位：
Lehrstuhl für Werkstofftechnologie (LWT)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/180583184?language=en
关键词：
Material Technological Concepts Diffusion Bonding

项目摘要

The metallurgical bonds between steel and light metals such as titanium or magnesium are among the most demanding bonding pairs. Due to oxide layers, intermetallic precipitates in the joint zone, and an unfavorable melting behavior, most conventional joining techniques fail when applied to light metals. During the applied processing period, a new bonding process, based on diffusion brazing has been developed for joining titanium-steel and magnesium-steel. Using PVD coatings, the selected additional materials were deposited on the joining partners. Then Ti-Ti- and Ti-St- as well as Mg-Mg- and Mg-St-brazements were carried out in a vacuum furnace. The metallurgical tests show that the well brazed joints were achieved without major brazing defects. Particular attention was paid to the precipitation of intermetallic phases, which were studied in detail by means EDX analyses. The mechanical properties of diffusion brazed joints correlated with the results of the metallurgical microstructure examinations.In the continuation phase, the presented work program will be carried out as planned. Based on the first working period, the obtained results will be transferred to brazements of the industrially highly relevant 1.4301 stainless steel and titanium alloy Ti6Al4V as well as the stainless steel and magnesium alloy AZ31. The purposes of this continuation application are to carry out extensive and fundamental investigation and clarification of the diffusion mechanism between the used PVD coatings and base materials. By eliminating the formation of intermetallic phases, high-strength Ti-St- and Mg-St-brazing joints can be achieved.

钢和轻金属（如钛或镁）之间的冶金结合是要求最高的结合对之一。由于氧化物层、接合区中的金属间沉淀物以及不利的熔化行为，大多数常规接合技术在应用于轻金属时失败。在实际应用过程中，开发了一种基于扩散钎焊的钛-钢、镁-钢连接新工艺。使用PVD涂层，将选定的附加材料沉积在连接件上。然后在真空炉中进行Ti-Ti-和Ti-St-以及Mg-Mg-和Mg-St-钎焊。金相试验表明，钎焊接头质量良好，无明显钎焊缺陷。特别注意的是金属间相的沉淀，这是通过EDX分析详细研究。扩散钎焊接头的力学性能与金相组织检查结果相关。在后续阶段，将按计划执行所提出的工作计划。基于第一个工作周期，所获得的结果将转移到工业上高度相关的1.4301不锈钢和钛合金Ti6 Al 4V以及不锈钢和镁合金AZ 31的钎焊。本继续申请的目的是对所使用的PVD涂层和基材之间的扩散机制进行广泛和基本的研究和澄清。通过消除金属间化合物相的形成，可以实现高强度的Ti-St-和Mg-St-钎焊接头。