锻压技术

TC4钛合金中空叶片扩散连接-超塑成形技术

英文标题：DB-SPF technology of hollow blade for TC4 titanium alloy

作者：王国峰赵相禹孙超杨默

单位：哈尔滨工业大学

关键词：

分类号：

出版年,卷(期):页码：2015,40(4):48-53

摘要：

采用扩散连接-超塑成形技术成形中空叶片在发动机减重方面具有重要的意义，本文进行了中空叶片的扩散连接-超塑成形实验，成形出质量较好的中空叶片，确定了最优的实验参数。分析了叶片芯板的壁厚分布以及上下面板与芯板的连接情况，并线扫描分析了扩散连接的接头。结果表明，随着扩散连接保温时间的延长，扩散连接接头的效果较好；通过多次试验得出，在成形温度T=920 ℃、内部气压P=2 MPa、成形时间t=2 h的条件下，进行超塑成形，成形所得的中空叶片表面质量良好，扩散连接接头较好，芯板的厚度变化较均匀。

It is of great importance to form hollow blade by DB-SPF technology in reducing weight of the engine. The DB-SPF tests of hollow blade were carried out, the good quality hollow blades were obtained, and the optimum experimental parameters were determined. The thickness distribution of core plate and the connection of the panels and core plate were analyzed, and the diffusion bonding joint was analyzed by line scanning analysis. The results show that effects of the diffusion bonding joint are better with the increase of holding time during diffusion bonding. By multiple experiments, it is obtained that the quality of hollow blade and the diffusion bonding joints are good, and thickness of the core board is uniform when temperature is 920 ℃,internal pressure is 2 MPa and the forming time is 2 h.

基金项目：

国家自然科学基金资助项目（51275129）；长江学者和创新团队发展计划资助（IRT1229）

王国峰（1973-），男，博士，教授，博士生导师

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