METHOD FOR PRODUCING PREFORM FOR ROLLING BEARING

A roughly shaped material for a rolling bearing of the present invention is produced by forging a steel composed of a high-carbon chrome bearing steel containing 0.7 mass% to 1.2 mass% of a carbon, and 0.8 mass% to 1.8 mass% of a chromium to a predetermined shape while heating the steel to a forging...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KASHIWAGI Shinichirou, YANO Takefumi, UEKITA Hiroki, HIRANO Tetsurou, SAITOU Toshikazu, NEISHI Yutaka
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS BEARINGS BLASTING CHEMISTRY ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FERROUS OR NON-FERROUS ALLOYS FLEXIBLE SHAFTS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PUNCHING METAL ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS THERMAL INSULATION IN GENERAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WEAPONS
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Beschreibung
Zusammenfassung:	A roughly shaped material for a rolling bearing of the present invention is produced by forging a steel composed of a high-carbon chrome bearing steel containing 0.7 mass% to 1.2 mass% of a carbon, and 0.8 mass% to 1.8 mass% of a chromium to a predetermined shape while heating the steel to a forging temperature in a range of (Ae 1 point+25°C) to (Ae 1 point+105°C), cooling a forged article to a temperature of Ae 1 point or lower, and performing an annealing in which the forged article that is obtained is heated to a soaking temperature in a range of (Ae 1 point+25°C) to (Ae 1 point+85°C), the forged article is retained for 0.5 hours or longer, and the forged article is cooled down to 700°C or lower at a cooling rate of 0.30 °C/s or slower.