Method for preparing shaped metal bodies for cold working
The invention relates to a method for treating shaped bodies having a steel surface having a carbon content in the range of 0 to 2.06 wt% and a chromium content in the range of 0 to < 10 wt% before cold working, wherein at least one shaped body is brought in contact with an aqueous acidic composi...
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| creator | SCHWINKE-KRUSE, NORBERT HOLLMANN, FRANK GUETTLER, BENJAMIN SCHNEIDER, RALF ORBEN, MARTIN QUINTANA, INAKI NIEVES GARCIA, GORKA DE LUIS |
| description | The invention relates to a method for treating shaped bodies having a steel surface having a carbon content in the range of 0 to 2.06 wt% and a chromium content in the range of 0 to < 10 wt% before cold working, wherein at least one shaped body is brought in contact with an aqueous acidic composition in order to form a conversion layer as a separating layer, wherein the aqueous acidic composition is prepared only with a formulation that consists substantially of water, 2 to 500 g/L of oxalic acid, and (a) 0.01 to 20 g/L of at least one accelerator based on guanidine and/or (b) 0.01 to 20 g/L of at least one nitrate and optionally of pigment, surfactant, and/or thickening agent, wherein the pickling removal of the aqueous acidic composition is in the range of 1 to 6 g/m2, wherein the layer weight of a dried conversion layer is in the range of 1.5 to 15 g/m2, wherein the ratio of pickling removal to layer weight PR : LW of the dried conversion layer is in the range of (0.30 to 0.75) : 1 and wherein the dried co |
| format | Patent |
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| subjects | CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION |
| title | Method for preparing shaped metal bodies for cold working |
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