Method for improving Cr-Mn-N austenitic stainless steel surface hardness

The invention aims at providing a method for improving the Cr-Mn-N austenitic stainless steel surface hardness. The method is characterized in that gas carburizing treatment is conducted on the Cr-Mn-N austenitic stainless steel surface by adopting a pulsed carburizing technology, carburizing treatm...

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Bibliographische Detailangaben
Hauptverfasser:	KONG FANYA, CHEN YAWEN, CHEN DEMIN, DU XIANGYUAN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	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 INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	The invention aims at providing a method for improving the Cr-Mn-N austenitic stainless steel surface hardness. The method is characterized in that gas carburizing treatment is conducted on the Cr-Mn-N austenitic stainless steel surface by adopting a pulsed carburizing technology, carburizing treatment is conducted in a tube-type heating furnace, electric resistance wire heating is conducted, a certain amount of CO, N2 and H2 are introduced as needed, and salt bath nitriding pretreatment is conducted on a sample preferably before gas carburizing treatment. According to the method, the Cr-Mn-Naustenitic stainless steel surface hardness can be improved, then the service life is prolonged, and the running reliability is improved. 本发明的目的在于提供种提高Cr-Mn-N奥氏体不锈钢表面硬度的方法，其特征在于：采用脉冲式渗碳工艺对Cr-Mn-N奥氏体不锈钢表面进行气体渗碳处理，渗碳处理在管式加热炉中进行，电阻丝加热，根据需要通入定量的CO、N和H，气体渗碳处理前优选对试样进行盐浴渗氮预处理。该方法可以提高Cr-Mn-N奥氏体不锈钢表面硬度，进而提高其使用寿命以及运行可靠性。