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US 5,328,531 AGranted
Process for the manufacture of components in treated steel
OwnerJacques Gautierinventor
Life of this patent
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Abstract
Process for the manufacture of components from untreated steel, comprising a series of heat treatment and forming operations, characterised by heating the steel to a temperature above the transition point (austenizing), isothermal quenching in a fluidized bed bath immediately after the austenizing heating giving the steel a bainitic structure and then forming the components under mild conditions.
Claims10
A method of manufacturing spring components from untreated alloy steel material containing 0.48 to 0.59% C, about 0.70 to 1.10% Cr, 0.70 to 0.90% Mn and 0.15 to 0.35% Si, comprising the steps of:
- heating the steel material at a temperature above its transition point, thus austenizing the steel material,
- following said austenizing heating, isothermally quenching the steel material in a fluidized bed bath at a temperature above its martensite point, thus giving the steel material a bainitic structure, and
- without lowering the temperature substantially below said quenching temperature, mechanically forming the steel material to give it the final shape of the components.
Dependencies are inferred from the claim text.