Process for manufacturing stainless-steel seamless steel pipe used for high-pressure boiler, boiler and heat-exchanger

A process for manufacturing stainless-steel seamless steel pipes used for a high-pressure boiler, a boiler and a heat-exchanger comprises two aspects of smelting austenitic stainless steel billets and manufacturing seamless steel pipes. In the smelting of the austenitic stainless steel billets, the...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	QIAN XIAO, FU FENGREN, QIAN LEZHONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALLOYS AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL CHEMICAL SURFACE TREATMENT CHEMISTRY CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL FERROUS OR NON-FERROUS ALLOYS FUELS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LUBRICANTS LUBRICATING COMPOSITIONS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES PUNCHING METAL ROLLING OF METAL TECHNICAL GASES CONTAINING CARBON MONOXIDE TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A process for manufacturing stainless-steel seamless steel pipes used for a high-pressure boiler, a boiler and a heat-exchanger comprises two aspects of smelting austenitic stainless steel billets and manufacturing seamless steel pipes. In the smelting of the austenitic stainless steel billets, the carbon content of corresponding steel grades is increased properly and contents of titanium and niobium of steel grades containing titanium and niobium are controlled. In the manufacturing process of the seamless steel pipes, hot piercing temperature is controlled respectively according to different steel grades; cold deformation is controlled to be below 50 percent; and the anneal treatment is carried out respectively at proper-high product-in-process softening temperature and proper-low finished-product solid solution temperature. The adoption of the manufacturing process of the invention leads the manufactured seamless steel pipe to obtain high creep fracture intensity, high anti-high-temperature steam corrosion