Patent · US Active

Method for the production of chassis parts from micro-alloyed steel with improved cold formability

US12053815B2 · kind B2 · utility

0Cited by

2References

19Claims

0Family size

Assignee

Salzgitter Flachstahl GmbH · DE

Inventors

Ingwer Denks · Duisburg, DE
Stefan Mütze · Hannover, DE
Christian Pelz · Wolfenbüttel, DE

Key dates

Filing date	Nov 15, 2017
Grant date	Aug 6, 2024
Priority date	—
Expiry date	Oct 6, 2038

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC21D2221/00
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention relates to a method for producing a chassis part from micro-alloyed steel, having an improved cold workability of cold-solidified, mechanically separated sheet-metal edges, comprising the following method steps: —providing a hot-rolled strip or a hot-rolled strip sheet of the claimed alloy composition in weight percent, cutting a blank at room temperature and optionally carrying out further punching or cutting operations, —heating exclusively the sheet metal edge regions of the blank, which have been cold-solidified by the cutting or punching operations, to a temperature of at least 700° C. with a dwell time of at most 10 seconds and subsequent cooling with air, —cold forming the blank in one or more steps to form a chassis part at room temperature.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.