Smelting method of manganese-aluminum-iron-nickel bronze alloy

Abstract

The invention provides a smelting method of a manganese-aluminum-iron-nickel bronze alloy ingot. The smelting method comprises the following steps: firstly, cleaning the defects of burnt-on sand and flash on the surface of a copper alloy electrode; then, the copper alloy electrode is connected to an electrode chuck through a welding or mechanical connection method, and the copper alloy electrode is baked to be completely dried; then, the slag materials of the CaF2-NaF-AlF3 ternary slag system or the CaF2-NaF-BaF2 ternary slag system are independently baked, and the slag materials obtained after baking are weighed according to the proportion and mixed to be uniform; the evenly-mixed slag materials are laid to the bottom in a crystallizer, and the slag materials are electrically polarized through graphite; electroslag remelting is conducted by exchanging the copper alloy electrode, inert atmosphere protection is conducted in the whole remelting process, power is cut off after electroslag remelting is completed, and the protective atmosphere is maintained for slow cooling; and finally, the crystallizer is removed, slag crust on the surface of the electroslag ingot is removed, and the manganese-aluminum-iron-nickel bronze alloy ingot is obtained. According to the method, the defects of air holes and segregation generated during casting of the manganese-aluminum-iron-nickel bronze alloy and the defect of high control difficulty can be effectively overcome, and production of high-homogeneity and low-microporosity cast ingots is achieved.

Description

technical field [0001] The invention relates to the field of copper alloy forgings, in particular to a method for smelting a manganese-aluminum-iron-nickel bronze alloy ingot. Background technique [0002] Cast manganese-aluminum-iron-bronze alloy has good corrosion resistance, small specific gravity, high strength, excellent resistance to seawater erosion, and cavitation corrosion. The ZCuAl8Mn14Fe3Ni2, ZCuAl8Mn13Fe3Ni2 grades listed in the Specification for Alloy Castings and the ZCuAl8Mn13Fe3, ZCuAl8Mn13Fe3Ni2 and ZCuAl8Mn14Fe3Ni2 grades listed in GB / T1173-2013 "Casting Copper and Copper Alloys", but these copper alloy grades are casting alloy grades, usually centrifugal casting Or sand casting production, such as the high manganese aluminum bronze ZCuAl8Mn13Fe3Ni2 in the paper "Study on the Vertical Centrifugal Casting Process of Large High Manganese Aluminum Bronze Bushing" is produced by centrifugal casting; Sand casting and centrifugal casting production. [0003] C...

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