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Method for preparing CuMn12Ni alloy by adopting vacuum induction melting

A vacuum induction melting and vacuum melting furnace technology, applied in the field of ferrous metal alloys, can solve problems such as patch resistivity, unqualified temperature coefficient of resistance, high impurity content of alloy materials, uneven composition and structure, etc. Uniform and consistent, reducing element burning effect

Active Publication Date: 2020-08-14
SIRUI ADVANCED COPPER ALLOY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the high-end manganese-copper alloys in the domestic market are all imported. The domestic production process mostly adopts non-vacuum melting. The alloy materials produced have high impurity content, uneven composition and structure, and the resistivity and temperature coefficient of resistance of the manufactured chips are unqualified.

Method used

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  • Method for preparing CuMn12Ni alloy by adopting vacuum induction melting
  • Method for preparing CuMn12Ni alloy by adopting vacuum induction melting
  • Method for preparing CuMn12Ni alloy by adopting vacuum induction melting

Examples

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Embodiment 1

[0035] Embodiment 1: A kind of adopts vacuum induction melting to prepare CuMn 12 The method for Ni alloy, comprises the following steps:

[0036] 1) Ingredients: In terms of percentage content, the percentage content of each element in the raw material is: Mn 12%, Ni 2%, the balance is Cu, and the required raw materials are weighed in proportion; among them, Cu element is added in the form of electrolytic copper plate , the Mn element uses electrolytic manganese flakes, and the Ni element uses commercially available CuNi 3 0 master alloy;

[0037] 2) Furnace loading: Put the prepared alloy material into the crucible, close the furnace cover of the vacuum melting furnace, close the vent valve, and clean the observation window;

[0038] 3) Vacuuming: Turn on the mechanical pump, open the low-vacuum baffle valve to evacuate, and turn on the Roots pump when the vacuum pressure р in the vacuum melting furnace is 0.08MPa;

[0039] 4) Melting: When smelting, when the vacuum degre...

Embodiment 2

[0042] Embodiment 2: A kind of adopts vacuum induction melting to prepare CuMn 12 The method for Ni alloy, comprises the following steps:

[0043] 1) Ingredients: In terms of percentage content, the percentage content of each element in the raw material is: Mn 12.3%, Ni 2.05%, the balance is Cu, and the required raw materials are weighed in proportion; among them, Cu element is added in the form of electrolytic copper plate , Mn elements use electrolytic manganese flakes, and Ni elements use CuNi 3 0 master alloy, the CuNi 3 0 The preparation method of the master alloy is as follows: ① Ingredients: Calculated by percentage, the percentage content of each element in the raw material is: Cu 70%, Ni 30%, and the required raw materials are weighed in proportion; among them, the Cu element is in the form of electrolytic copper plate Adding, the Ni element is added in the form of electrolytic nickel plate; ② Furnace loading, put the prepared alloy material into the crucible, close...

Embodiment 3

[0049] Embodiment 3: A kind of adopts vacuum induction melting to prepare CuMn 12 The method for Ni alloy, comprises the following steps:

[0050] 1) Ingredients: In terms of percentage content, the percentage content of each element in the raw material is: Mn 12.3%, Ni 2.10%, the balance is Cu, and the required raw materials are weighed in proportion; among them, Cu element is added in the form of electrolytic copper plate , Mn elements use electrolytic manganese flakes, and Ni elements use CuNi 3 0 master alloy, the CuNi 3 0 The preparation method of the master alloy is as follows: ① Ingredients: Calculated by percentage, the percentage content of each element in the raw material is: Cu 70%, Ni 30%, and the required raw materials are weighed in proportion; among them, the Cu element is in the form of electrolytic copper plate Adding, the Ni element is added in the form of electrolytic nickel plate; ② Furnace loading, put the prepared alloy material into the crucible, close...

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Abstract

The invention discloses a method for preparing CuMn12Ni alloy by adopting vacuum induction melting. The method comprises the following steps that burdening is carried out, specifically, an electrolytic copper plate, an electrolytic manganese sheet and a CuNi3O intermediate alloy material are respectively weighed; charging is carried out, specifically, the prepared alloy material is charged into acrucible, a deflation valve is closed; vacuumizing is carried out, specifically, turning on a mechanical pump is carried out, a low-vacuum baffle valve is opened for vacuumizing, turning on a roots pump is carried out when the vacuum pressure p in a furnace is less than or equal to 0.08 MPa; smelting is carried out, specifically, when the vacuum degree p is smaller than or equal to 10 Pa, heatingis carried out, the heating power is increased to 60 KW, when the raw material in the crucible begins to be molten, the power is reduced to be lower than 20 KW, an argon filling valve is opened, whenthe pressure in the furnace is increased to about 0.08 Mpa, the argon filling valve is closed, the power is increased to 65 KW, refining is carried out for 2 min; casting is carried out, specifically,the power is reduced to 40KW + / -5KW, keeping for 0.2 minute is carried out, casting is started, the casting time is less than or equal to 2min; and discharging is carried out, specifically, after casting is completed, heating is stopped, and after cooling is carried out for 30 min, discharging is carried out. According to the method for preparing the CuMn12Ni alloy by adopting vacuum induction melting, the technological process is reasonable in design, and the prepared CuMn12Ni alloy is low in gas content, uniform in structure, free of segregation defects and suitable for large-scale popularization.

Description

technical field [0001] The invention relates to the technical field of ferrous metal alloys, in particular to a method for preparing CuMn by vacuum induction melting 12 Ni alloy method. Background technique [0002] CuMn 12 Ni is a resistance material, which is a basic material used to make resistance elements in electronic instruments, measuring instruments and other industrial devices. It is widely used in various fields such as motors, instrumentation, automobiles, aerospace and missile atomic energy. It has a small temperature coefficient of resistance, low electric heating potential to copper and high resistance stability, and high resistivity. It is a superior resistance alloy material and can be made into powder, wire, foil, sheet, strip , rod, tube and other shapes, the surface can also be coated with various insulating materials. It is mainly used to make standard resistors, separators, precision or ordinary resistance elements, high-grade metering voltage, curre...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C9/05C22C9/06C22F1/08B22D7/06F27B14/04F27B14/06F27B14/08F27B14/10
CPCB22D7/005B22D7/06C22C1/03C22C9/05C22C9/06C22F1/002C22F1/08F27B14/04F27B14/061F27B14/08F27B14/10F27B2014/002F27B2014/045F27B2014/0831F27M2003/13Y02P10/25
Inventor 刘琦孙君鹏刘向东王群唐丽尖田东松韩依曼梁建斌王文斌
Owner SIRUI ADVANCED COPPER ALLOY CO LTD
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