Thürer Susanne Elisabeth, Peters Kai, Heidenblut Torsten, Heimes Norman, Peddinghaus Julius, Nürnberger Florian, Behrens Bernd-Arno, Maier Hans Jürgen, Klose Christian
Institut für Werkstoffkunde (Materials Science), An der Universität 2, 30823 Garbsen, Germany.
Institut für Umformtechnik und Umformmaschinen (Forming Technology and Machines), An der Universität 2, 30823 Garbsen, Germany.
Materials (Basel). 2022 Feb 24;15(5):1692. doi: 10.3390/ma15051692.
Within the framework of the Collaborative Research Center 1153, we investigated novel process chains for the production of bulk components with different metals as joining partners. In the present study, the co-extrusion of coaxially reinforced hollow profiles was employed to manufacture semi-finished products for a subsequent die-forging process, which was then used for the manufacture of hybrid bearing bushings. The hybrid hollow profiles, made of the aluminum alloy EN AW-6082 paired with either the case-hardening steel 20MnCr5, the stainless steel X5CrNi18-10, or the rolling bearing steel 100Cr6, were produced by Lateral Angular Co-Extrusion. Push-out tests on hybrid hollow sections over the entire sample cross-section showed shear strengths of 44 MPa ± 8 MPa (100Cr6) up to 63 MPa ± 5 MPa (X5CrNi18-10). In particular, the influence of force and form closure on the joint zone could be determined using specimen segments tested in shear compression. Locally, shear strengths of up to 131 MPa (X5CrNi18-10) were demonstrated in the shear compression test. From these samples, lamellae for microstructural analysis were prepared with a Focused Ion Beam. Detailed analyses showed that for all material combinations, a material bond in the form of an ultra-thin intermetallic phase seam with a thickness of up to 50 nm could be established.
在合作研究中心1153的框架内，我们研究了以不同金属作为连接伙伴生产大型部件的新型工艺链。在本研究中，采用同轴增强空心型材的共挤工艺制造用于后续模锻工艺的半成品，然后用于制造混合轴承衬套。由铝合金EN AW-6082与渗碳钢20MnCr5、不锈钢X5CrNi18-10或滚动轴承钢100Cr6配对制成的混合空心型材，通过横向角向共挤工艺生产。对整个样品横截面的混合空心型材进行的推出试验表明，剪切强度在44 MPa±8 MPa（100Cr6）至63 MPa±5 MPa（X5CrNi18-10）之间。特别是，使用在剪切压缩中测试的试样段，可以确定力和形状封闭对连接区域的影响。在剪切压缩试验中，局部剪切强度高达131 MPa（X5CrNi18-10）。从这些样品中，用聚焦离子束制备了用于微观结构分析的薄片。详细分析表明，对于所有材料组合，都可以形成厚度高达50 nm的超薄金属间相缝形式的材料结合。
