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Production of complex geometries made of particle reinforced steel materials by powder compaction and subsequent thixoforging

通过粉末压实和随后的触变锻造生产由颗粒增强钢材制成的复杂几何形状

基本信息

批准号：
147785650
负责人：
Professor Dr.-Ing. Bernd-Arno Behrens
金额：
--
依托单位：
Institut für Umformtechnik und Umformmaschinen (IFUM)
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 2018-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/147785650?language=en
关键词：
Production complex geometries made particle

项目摘要

Within the first project phase the provided process chain for the production of model components made of particle reinforced steel materials could be realized by powder pressing with subsequent thixoforging. For this purpose, cylindrical semi-finished products with and without reinforcement particles (titanium carbide powder) were produced by powder metallurgical processes. The specific material factors for pressing and sintering depending on the reinforcement phase were identified. By means of the inductive heating process the semi-finished products were heated up to the thixotropic temperature range, whereby a sufficient dimensional stability of parts could be detected. The thixoforging process also has shown that a complete filling of the mold for the selected geometry could be achieved by the determined of the forging parameters. In addition, the produced compo-nents were characterized by micrographs, hardness measurements and tensile tests.Based on the described results in the second project phase the complexity of the thixoforged com-ponents should be significantly increased. Using the results of the production and heating of the semi-finished products two very complex component geometries should be manufactured by thixoforging of particle reinforced steel materials. In addition, the specific advantages of powder metallurgy should be used for the production of semi-finished products with partial particle reinforcement. This way, complex components with adapted material properties can be manufactured, which can better resist an existing stress profile in use. An important aim of the provided process chain is to adapt the inductive heating process as well as the forming process on the partially particle reinforced semi-finished products.

在第一个项目阶段，所提供的用于生产由颗粒增强钢材制成的模型部件的工艺链可以通过粉末压制和随后的触变锻造来实现。为此，通过粉末冶金工艺生产了带有和不带有增强颗粒（碳化钛粉末）的圆柱形半成品。确定了根据增强相进行压制和烧结的具体材料因素。通过感应加热过程，半成品被加热到触变温度范围，从而可以检测到零件足够的尺寸稳定性。触变锻造工艺还表明，通过确定锻造参数，可以实现所选几何形状的模具的完全填充。此外，还通过显微照片、硬度测量和拉伸测试对所生产的部件进行了表征。根据第二项目阶段所述的结果，触变锻造部件的复杂性应显着增加。利用半成品的生产和加热结果，可以通过颗粒增强钢材料的触变锻造来制造两种非常复杂的几何形状部件。此外，还应利用粉末冶金的特有优势来生产部分颗粒强化的半成品。通过这种方式，可以制造具有适当材料特性的复杂部件，从而可以更好地抵抗使用中现有的应力分布。所提供的工艺链的一个重要目的是适应感应加热工艺以及部分颗粒增强半成品的成型工艺。