Iron-based rare earth high-chromium wear-resistant welded steel spherical elbow

• Main Authors: WANG WEI, CAO JUCHENG, KOU JIANAN, CUI YAN, KOU JIANGMIN, KOU SHENGRUI, KOU GUOZHEN
• Format: Patent
• Language: Chinese; English
• Published: 14.07.2010
• Subjects: ALLOYS; BLASTING; CHEMISTRY; ENGINEERING ELEMENTS AND UNITS; FERROUS OR NON-FERROUS ALLOYS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; PIPES; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

The invention relates to an iron-based rare earth high-chromium wear-resistant welded steel spherical elbow, belonging to the field of metal casting and welding. The steel material of the spherical elbow includes low carbon, high chromium and low nickel, and the formula of rare earth is added; and the metallographic structure of the steel material is the dual-phase structure where austenite, ferrite and carbide coexist under as cast condition. During discharge, 0.02-0.2% of 1# Baotou rare earth ferrosilicon alloy is added in the ladle for treatment and the rest are iron and impurities generally formed under smelting condition. The spherical elbow has pure steel, refined and spheroidized grains and compact structure, thus the scouring resistance and the wear resistance are excellent, and the service life is improved by 2.5 times compared with the service life of the original pieces; and the change times of the spherical elbow is decreased in the enterprises, the spherical elbow saves time and labor working alo