Application of a nickel-molybdenum master alloy in the preparation of ernicrmo-3 alloy

A technology of master alloy and nickel-magnesium alloy, applied in the field of processing technology of nickel-molybdenum master alloy, can solve problems such as segregation, and achieve the effects of fine and uniform particle size, stable product quality, and easy industrial scale production.

Active Publication Date: 2019-11-12
BAOJI TITANIUM IND
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Application of a nickel-molybdenum master alloy in the preparation of ernicrmo-3 alloy
  • Application of a nickel-molybdenum master alloy in the preparation of ernicrmo-3 alloy
  • Application of a nickel-molybdenum master alloy in the preparation of ernicrmo-3 alloy

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Embodiment Construction

[0014] The process for producing nickel-molybdenum master alloys includes the following steps:

[0015] The content of nickel in the master alloy is 30%-60%, and the rest is molybdenum.

[0016] Step 1, material preparation: take nickel by weight ratio: 30%-60%, and the rest is molybdenum. The proportion of the ingredients is the eutectic point of the alloy, which is easy to realize the crushing of the intermediate alloy in the subsequent processing;

[0017] Step 2. Furnace loading: first put part of the nickel into the bottom of the crucible, then put the carbon into the crucible, then put the rest of the nickel into the crucible, put the molybdenum into the alloy bin, and put a small amount of nickel-magnesium alloy and carbon into the alloy bin. This furnace loading sequence is conducive to the removal of harmful impurity elements and deoxidation to ensure the purity of the alloy;

[0018] Step 3. Melting: Vacuumize until the air pressure in the crucible is less than or ...

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Abstract

The invention discloses a preparation method of an nickel-molybdenum intermediate alloy. The method comprises the following steps of a, taking 30%-60% of nickel and 40%-70% of molybdenum according tothe weight ratio; b, filling a crucible with a part of nickel, filling the crucible with carbon, then filling the crucible with the rest nickel, and filling an alloy bin with molybdenum, a small amount of the nickel-magnesium alloy and the carbon; c, vacuumizing the crucible to be less than or equal to 5 pa, carrying out heating and smelting, heating at the speed of 2-5 kw / 5 min to 25 kw when thetemperature is below 25kw, then heating at the speed of 5 kw / 10 min to 30kw; carrying out refining for 10 minutes, carrying out standing for 5 minutes until the air pressure in the crucible reaches 0.07 Mpa, adding molybdenum in the alloy bin into the crucible, raising the power to 20 kw, carrying out refining for 4 minutes and standing for 1 minute after the materials in the crucible are completely melted until the liquid surface is clarified, carrying out power failure, closing the valve and adding the nickel-magnesium alloy, carrying out heating after the nickel-magnesium alloy is added, pouring the mixture into a mold when the liquid surface is clarified and the temperature is proper, and the mixture is cooled for 20 minutes and discharged out of the crucible.

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-molybdenum master alloy, wherein the content of molybdenum is 40%-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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/03C22C27/04C22C30/00C22C1/03
CPCC22C1/03C22C19/03C22C27/04C22C30/00
Inventor 丁五洲李林任连保董洁杨永石舒强程伟刘立郭建华
Owner BAOJI TITANIUM IND
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