Pearlitic soft-sealing brake valve body easy to weld and preparation method thereof

The invention relates to a pearlitic soft-sealing brake valve body easy to weld. The valve body comprises the following chemical element ingredients by mass percent: 3.2-3.6% of Cr, 3.6-3.8% of C, 2.7-2.9% of Si, less than 0.6% of Mn, less than 0.08% of P, less than 0.01% of S, 0.003-0.05% of Se, 0....

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Bibliographic Details
Main Author WU SHOUTAO
Format Patent
LanguageEnglish
Published 29.04.2015
Subjects
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:The invention relates to a pearlitic soft-sealing brake valve body easy to weld. The valve body comprises the following chemical element ingredients by mass percent: 3.2-3.6% of Cr, 3.6-3.8% of C, 2.7-2.9% of Si, less than 0.6% of Mn, less than 0.08% of P, less than 0.01% of S, 0.003-0.05% of Se, 0.01-0.08% of Nb, 0.003-0.01% of Al and the balance of Fe. By adding Se, Nb and Cr, the strength and corrosion resistance of the valve body are improved, and the cutting performance is good; by using specific ingredients, and metallographical waste nodular cast iron and waste steel, the strength, toughness and quality stability of the valve body are improved; the balling process enables the absorption rate of Mg, RE and Si to be increased, the balling reaction is stable, and balling decaying is prevented 15 min after the balling reaction; the pearlitic structure on the surface of the valve body greatly improves the strength, plasticity and toughness.
Bibliography:Application Number: CN20141848562