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首页> 外文期刊>Rivista Italiana della Saldatura >Applicazione della tecnologia SPF-DB (Superplastic Forming - Diffusion Bonding) su componenti aeronautici in lega di titanio Ti-6Al-4V
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Applicazione della tecnologia SPF-DB (Superplastic Forming - Diffusion Bonding) su componenti aeronautici in lega di titanio Ti-6Al-4V

机译:SPF-DB技术(超塑成型-扩散结合)在Ti-6Al-4V钛合金飞机部件上的应用

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摘要

Since 1990 the Super Plastic Forming Diffusion Bonding (SPF/DB) process is used by Alenia (Aircraft division) to produce primary structural components made of(Ti6Al4V) alloys. This technology is currently considered strategic in the manufacturing of parts having elevated requisites of rigidity and lightness. The superplastic forming allows to achieve complex geometries with saving of weight and reduction of the phases of moulding and of the assembly operations. The super plastic behaviour and the metallurgical phenomena regarding the diffusion bonding, are here analized. The material characteristics at the basis of the process, are investigated pointing out the main parameters and their influence. Besides, the paper contains a description of the technological SPF-DB process, taking into account the Alenia experience, carried out on two sheets and using the two step technique with particular regard to the facilities and the preliminary operations for the SPF-DB process, that are critical to prevent the typical defectology. It is here also described the laboratory tests and the operations aimed to the acceptability of the components in production phase, explaining the philosophy of choice of such techniques of control.
机译:自1990年以来,Alenia(飞机部门)使用了超级塑性成形扩散结合(SPF / DB)工艺来生产由(Ti6Al4V)合金制成的主要结构部件。目前,在制造对刚性和轻度有较高要求的零件时,该技术被认为具有战略意义。超塑性成形允许实现复杂的几何形状,同时减轻重量,减少成型阶段和组装操作。关于扩散结合的超塑性行为和冶金现象在这里得到了分析。研究了工艺基础上的材料特性,指出了主要参数及其影响。此外,本文还结合Alenia的经验,对SPF-DB工艺流程进行了描述,该过程分两页进行,并采用两步技术,特别是针对SPF-DB工艺的设施和初步操作,对于防止典型缺陷至关重要。这里还描述了旨在使组件在生产阶段可接受的实验室测试和操作,从而说明了选择此类控制技术的理念。

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