Application of a nickel-manganese master alloy in the preparation of ernicr-3 alloy

Abstract

The invention discloses a preparation method of a nickel-manganese intermediate alloy. The preparation method comprises the following steps of a, 30%-60% of nickel and the balance manganese are takenaccording to the weight ratio; b, a part of the nickel is put into the bottom part of a crucible, then carbon is put into the crucible, the rest nickel is further put into the crucible, the manganeseis put into an alloy bin, and a small amount of nickel-magnesium alloy and the carbon are also put into the alloy bin; and c, when vacuumizing is carried out until the air pressure in the crucible issmaller than or equal to 5 pa, heating and smelting are started, heating power is increased to 25kw according to a heating method that the heating power is increased by 2-5kw every 5 minutes when theheating power is below 25kw, then the heating power is increased to 30kw according to a heating method that the heating power is increased by 5kw every 10 minutes, after materials in the crucible arecompletely melted until a liquid level is clarified, the materials are refined for 10 minutes and then left to stand for 5 minutes, power is cut off, a large valve is closed to charge argon until theair pressure in the crucible reaches 0.07Mpa, the manganese in the alloy bin is added into the crucible, the power is increased to 20kw, after the materials in the crucible are completely melted untilthe liquid level is clarified, the materials are refined for 4 minutes and left to stand for 1 minute, the power is cut off, the valve is closed, the nickel-magnesium alloy is added, and is heated after the nickel-magnesium alloy is added, when the liquid level clearing temperature is appropriate, a mixture is poured into a mold and cooled for 20 minutes, and the mixture is discharged out of themold.

Description

technical field [0001] The invention belongs to the technical field of metal material smelting and processing, and in particular relates to a processing technology of a nickel-manganese master alloy. The manganese content is 30-70% and the rest is nickel. Background technique [0002] Nickel-based alloy is an important corrosion-resistant metal material. Corrosion-resistant nickel-based alloys are widely used in chemical and chemical engineering, wet-corrosion-resistant parts of generators (such as water heaters and steam pipes, etc.), pollution control equipment (such as exhaust gas desulfurization equipment, etc.), and the amount of these corrosion-resistant nickel-based alloys accounts for about The total consumption of nickel-based alloys accounts for 30%, and the remaining corrosion-resistant nickel-based alloys for ships and marine engineering account for about 10%. Nickel-based alloys are mainly used as deformed materials, and there are also some cast alloys, such as...

AI Technical Summary

Problems solved by technology

In the traditional process of processing nickel-based alloys, pure nickel and manganese are directly added to prepare alloys. The alloys produced by this production process are prone to segregation

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