Alloy gray cast iron material for locomotive brake disc, and casting method of alloy gray cast iron material

• Main Authors: ZHU HAIYANG, YIN SHEXIN
• Format: Patent
• Language: English
• Published: 28.01.2015
• Subjects: ALLOYS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; METALLURGY OF IRON; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to an alloy gray cast iron material for a locomotive brake disc, and a casting method of the alloy gray cast iron material. Eight raw materials including steel scrap, cast iron ingots, silicon iron, manganese iron, ferrochromium, electrolytic tin, electrolytic nickel and electrolytic copper are adopted; the method comprises the following steps: carrying out shot blast cleaning on the cast iron ingots and the steel scrap, putting the raw materials into a furnace, melting, sampling at the stokehole, testing the chemical composition of the alloy gray cast iron material, molding by casting, and the like; the mechanical performances of the obtained alloy gray cast iron material for the locomotive brake disc reach the following standards: the tensile strength (Be b MPa) is more than or equal to 295, and the Brinell hardness (HBW) is more than or equal to 200-240. The alloy gray cast iron material is a low-alloying wear-resistant material, and has a stable metallographic structure and mechanical property; the alloy gray cast iron material is used for producing the brake disc, and the physical and chemical performance standards of the brake disc are superior to those of the similar abroad products. The metallographic structure and comprehensive mechanical performance of the alloy gray cast iron material are much better than those of the similar abroad products; the service life of the alloy gray cast iron material exceeds 2 million kilometers.