METHOD FOR PRODUCING AN ENERGY-STORING CONTAINER MADE OF LIGHTWEIGHT STEEL

摘要

An energy-storing container is made of a lightweight steel having the following chemical composition (in wt %): C 0.04-2%; Mn 14-30%; Al 1.5-12%; Si 0.3-3%; Cr 0.12-6%, and additionally one or more of the following elements: Ti, V, Nb, B, Zr, Mo, Ni, Cu, W, Co, P, N, each at up to 5% and in total at up to 10%, wherein the remainder is Fe including common steel tramp elements, wherein the concrete alloy composition is selected in order to limit the α′-martensite fraction before or after a forming process to no more than 3%, with the stipulation that the α′-martensite equivalent according to 0.1*wt % Mn wt % C 0.05*wt % Si is between 3.4 and 10.5.

主权项

1. A method of producing an energy-storing container made of a lightweight steel with the following chemical composition (in wt %):
C 0.04-2% Mn 14-30% Al 1.5-12% Si 0.3-3% Cr 0.12-6%,
one or more elements selected from Ti, V, Nb, B, Zr, Mo, Ni, Cu, W, Co, P, and N, each up to 5% and in total up to 10%, wherein the remainder is Fe including common steel tramp elements, wherein the steel has an α′-martensite content before or after a deformation of the steel of maximally 3%, said method comprising:calculating an α′-martensite equivalent of the steel according to the formula 0.1*wt % Mn+weight % C*wt % Al+0.05*wt % Si≧3.4≦10.5; andselecting the Mn, Al, C and Si content of the steel in accordance with the calculated α′-martensite equivalent.