Method for Producing Thin-Walled Steel Castings from Highly Alloyed Steels with TRIP/TWIP Properties

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This invention describes a cost-effective method for producing thin-walled steel castings made from high-alloy steels that display TRIP (Transformation Induced Plasticity) and TWIP (Twinning Induced Plasticity) properties. The process includes casting the steel part, followed by diffusion annealing at high temperatures before cold-forming the part to its final dimensions. This enables the production of cast parts with wall thicknesses under 6 mm.

Use CasesContent extracted from patent full text and abstract with AI.

• Automotive components that require high strength and ductility with lightweight construction, such as car body parts or structural reinforcements.
• Manufacturing of thin-walled structural components in construction or machinery.
• Fabrication of safety-critical parts in transportation or heavy equipment.
• Production of specialized parts for energy, aerospace, or defense industries, where both strength and formability are crucial.

BenefitsContent extracted from patent full text and abstract with AI.

• Enables cost-effective production of thin-walled steel castings with high mechanical performance.
• Improves strength and ductility due to TRIP/TWIP properties, enhancing safety and reliability.
• Reduces material usage and weight, supporting lightweight design goals.
• Expands the application of advanced high-strength steels to more complex, thin-walled geometries than previously possible.
• Allows for precise control over final part dimensions and properties.

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Patent Abstract

Die Erfindung betrifft ein wirtschaftliches Verfahren zur Herstellung dünnwandiger Stahlgussteile aus austenitischem oder austenitisch-martensitischem Stahlguss mit TRIP/TWIP-Eigenschaften mit Dicken bzw. Wandstärken unter 6 mm mit den Schritten Gießen eines Gussteiles und Kaltumformen des Gussteiles auf sein Endmaß mittels unterschiedlicher Kaltumformverfahren, wobei nach dem Abgießen der Schmelze vor dem ersten Kaltumformschritt ein Diffusionsglühen bei 1080 bis 1300 °C und einer Haltezeit von 0,5 bis 50 h durchgeführt wird.