The production of multi-metal bulk components requires suitable manufacturing technologies. On the example of hybrid bevel gears featuring two different steels at the outer surface and on the inside, the applicability of the novel manufacturing technology of Tailored Forming was investigated. In a first processing step, a semi-finished compound was manufactured by cladding a substrate using a plasma transferred arc welding or a laser hotwire process. The resulting semi-finished workpieces with a metallurgical bond were subsequently near-net shape forged to bevel gears. Using the residual heat after the forging process, a process-integrated heat treatment was carried out directly after forming. For the investigations, the material combinations of 41Cr4 with C22.8 (AISI 5140/AISI 1022M) and X45CrSi9-3 with C22.8 (AISI HNV3/AISI 1022M) were applied. To reveal the influence of the single processing steps on the resulting interface, metallographic examinations, hardness measurements and micro tensile tests were carried out after cladding, forging and process-integrated heat treatment. Due to forging and heat-treatment, recrystallization and grain refinement at the interface and an increase in both, hardness and tensile strength, were observed.

中文翻译：

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量身定做的混合锥齿轮的微观组织演变和力学性能

多金属散装零件的生产需要合适的制造技术。以混合锥齿轮为例，该锥齿轮在外表面和内表面采用两种不同的钢，研究了量身定制的成型技术的适用性。在第一加工步骤中，通过使用等离子转移弧焊或激光热焊工艺包覆​​基板来制造半成品。随后将得到的具有冶金结合的半成品工件锻造为锥齿轮的近似最终形状。利用锻造工序后的余热，在成形后立即进行工序综合热处理。为了进行研究，使用了41Cr4与C22.8（AISI 5140 / AISI 1022M）和X45CrSi9-3与C22.8（AISI HNV3 / AISI 1022M）的材料组合。为了揭示单个加工步骤对所得界面的影响，在进行了熔覆，锻造和过程综合热处理之后，进行了金相检查，硬度测量和微拉伸试验。由于进行了锻造和热处理，观察到界面处的重结晶和晶粒细化以及硬度和拉伸强度均增加。