Projektinitiativ #97: Computational assessment of high performance low cost hybrid alloy gear manufacturing ( 2 kommentarer)

High-alloyed secondary hardening carburizable gear steels, such as Ferrium® C64, have high strength, high surface hardness, good fracture toughness and also high temperature resistance, but are limited in their application due to high alloy cost.

Johan Bratberg presents the initiative during the 2017 conference

To minimize material cost without sacrificing performance, novel manufacturing routes may be used to produce hybrid gears, where the high-alloy steel is used only in the teeth, and the core is replaced with a lower cost and/or lower density material. This can be performed by spray forming or additive manufacturing of the high performance steel onto the low cost substrate, or through a conventional powder manufacturing route. The high temperature thermal stability of the secondary hardening steels may also enable casting or semisolid injection of the core alloy into a Ferrium gear web. For either such hybrid components, alloy compatibility in the manufacturing process is key. Exploring these options comput ationally allows screening suitable candidate alloys and processes. CALPHAD-based modeling of phase stability, solidification, crack susceptibility and diffusion bonding can be performed using existing databases and ICME models. Top-candidate systems can then be prototyped for model validation and proof-of-concept, with the ultimate goal of creating a new class of high performance low cost gears.

Namn Ida Berglund
Organisation QuesTek Europe AB

Kommentar #1

Interesting proposal, could it be possible linked to Project initiative #104 in order to secure the robustness of the predictions of the hierarchy of ICME models?

Namn Fabio Santandrea
Organisation RISE

 

Kommentar #2

Vid presentationen visades en figur med diffusionszon på 45 µm mellan Ferrium C64 och ett enklare stål (SA160?) efter uppkolning vid 1100 V i 5h. Detta intresserar undertecknad, då jag disputerade på diffusionsfogning samt numera arbetar med utveckling av ultrahöghållfasta stål med extremt hög brottseghet.

Namn Richard Larker
Organisation Ausferritic AB, Indexator Rotator Systems AB & Rototilt Group AB