A kind of Mn-cu based submicro/nano porous high damping alloy and its preparation method

Abstract

The invention discloses a Mn-Cu-based submicron / nano-porous high-damping alloy and a preparation method thereof. The preparation method comprises heat-treating the Mn-Cu-based alloy so that the α-Mn phase is precipitated from the alloy to obtain a submicron or nanometer alloy. A composite material in which the α-Mn precipitates are dispersed and distributed on the Mn-Cu-based alloy matrix; the composite material is subjected to dealloying treatment to remove the α-Mn precipitates to obtain the Mn-Cu-based submicro / nanoporous high damping alloy. The finally obtained high damping alloy has the advantages of uniform pore formation and pore size distribution in nanometer or submicron size.

Description

technical field

[0001] The invention relates to the technical field of Mn-Cu-based alloys, in particular to a Mn-Cu-based submicron / nanoporous high-damping alloy and a preparation method thereof. Background technique

[0002] Mn-Cu alloy is a typical twin boundary relaxation type high damping alloy, and its high damping mechanism is the sliding of high density twin interface under stress. Due to the high vibration damping ability, good comprehensive performance, simple preparation process, and good hot working, cold working and welding properties, the vibration damping alloy has been well recognized in the relevant vibration and noise reduction industrial fields. Especially M2052 damping alloy (Mn-20Cu-5Ni-2Fe, at%), when the strain amplitude is 10 -6 When , the damping value can reach up to 0.06, showing good low-strain high-damping response characteristics. At the same time, the yield strength, tensile strength and elongation of this series of alloys reach 200MPa, 500MPa...

Examples

Embodiment 1

[0028] A kind of Mn-Cu based micro-nano porous high damping alloy, its preparation method comprises:

[0029] (1) Put pure metal Mn and Cu as raw materials in an intermediate frequency vacuum induction furnace, evacuate to below 10Pa, continue to pump after power transmission and preheating, so that the vacuum degree is always kept below 10Pa; Fill the room with argon gas to make the pressure reach 0.005MPa, and at the same time, use 300kW power to melt the metal material quickly. After melting, let it stand for 15 minutes with 80kW power to complete refining; then let it stand for 20 minutes with 60kW power; The temperature of the melt is raised until the conjunctiva ruptures, and then pouring is started, and the pouring time is controlled within 5 minutes to obtain an alloy ingot, that is, a Mn-Cu-based alloy with an alloy composition of 70wt% Mn and 30wt% Cu;

[0030] (2) Place the Mn-Cu-based alloy obtained in step (1) in a vacuum heat treatment furnace, pass through argon...

Embodiment 2

[0036] A kind of Mn-Cu based micro-nano porous high damping alloy, its preparation method comprises:

[0037] (1) Put pure metal Mn and Cu as raw materials in an intermediate frequency vacuum induction furnace, evacuate to below 10Pa, continue to pump after power transmission and preheating, so that the vacuum degree is always kept below 10Pa; The room is filled with argon to make the pressure reach 0.001MPa, and at the same time, the metal raw material is melted rapidly with a power of 260kW. After melting, the power of 100kW is left to stand for 10 minutes to complete the refining; the power of the power is increased to 240kW, and pure metal Fe, Al is used as an alloy material, smelted for 8 minutes, and then left to stand for 15 minutes with a power supply of 80kW; after that, the temperature of the melt is raised until the conjunctiva ruptures, and then pouring is started, and the pouring time is controlled within 7 minutes to obtain an alloy ingot, that is, the alloy compo...

Embodiment 3

[0042] A kind of Mn-Cu based micro-nano porous high damping alloy, its preparation method comprises:

[0043] (1) Put pure metal Mn and Cu as raw materials in an intermediate frequency vacuum induction furnace, evacuate to below 10Pa, continue to pump after power transmission and preheating, so that the vacuum degree is always kept below 10Pa; The room is filled with argon to make the pressure reach 0.002MPa, and at the same time, the metal raw material is melted rapidly with a power of 280kW. After melting, the power of 90kW is left to stand for 10 minutes to complete the refining; the power of the power is increased to 200kW, and pure metal Ni is added as For alloy materials, smelt for 10 minutes, and then stand still for 20 minutes with a power supply of 60kW; then raise the temperature of the melt until the conjunctiva ruptures, and then start pouring, and the pouring time is controlled within 6 minutes to obtain an alloy ingot, that is, the alloy composition is 80wt% Mn ,...

technical field

[0001] The invention relates to the technical field of Mn-Cu-based alloys, in particular to a Mn-Cu-based submicron / nanoporous high-damping alloy and a preparation method thereof. Background technique

[0002] Mn-Cu alloy is a typical twin boundary relaxation type high damping alloy, and its high damping mechanism is the sliding of high density twin interface under stress. Due to the high vibration damping ability, good comprehensive performance, simple preparation process, and good hot working, cold working and welding properties, the vibration damping alloy has been well recognized in the relevant vibration and noise reduction industrial fields. Especially M2052 damping alloy (Mn-20Cu-5Ni-2Fe, at%), when the strain amplitude is 10 -6 When , the damping value can reach up to 0.06, showing good low-strain high-damping response characteristics. At the same time, the yield strength, tensile strength and elongation of this series of alloys reach 200MPa, 500MPa...

Examples

Embodiment 1

[0028] A kind of Mn-Cu based micro-nano porous high damping alloy, its preparation method comprises:

[0029] (1) Put pure metal Mn and Cu as raw materials in an intermediate frequency vacuum induction furnace, evacuate to below 10Pa, continue to pump after power transmission and preheating, so that the vacuum degree is always kept below 10Pa; Fill the room with argon gas to make the pressure reach 0.005MPa, and at the same time, use 300kW power to melt the metal material quickly. After melting, let it stand for 15 minutes with 80kW power to complete refining; then let it stand for 20 minutes with 60kW power; The temperature of the melt is raised until the conjunctiva ruptures, and then pouring is started, and the pouring time is controlled within 5 minutes to obtain an alloy ingot, that is, a Mn-Cu-based alloy with an alloy composition of 70wt% Mn and 30wt% Cu;

[0030] (2) Place the Mn-Cu-based alloy obtained in step (1) in a vacuum heat treatment furnace, pass through argon...

Embodiment 2

[0036] A kind of Mn-Cu based micro-nano porous high damping alloy, its preparation method comprises:

[0037] (1) Put pure metal Mn and Cu as raw materials in an intermediate frequency vacuum induction furnace, evacuate to below 10Pa, continue to pump after power transmission and preheating, so that the vacuum degree is always kept below 10Pa; The room is filled with argon to make the pressure reach 0.001MPa, and at the same time, the metal raw material is melted rapidly with a power of 260kW. After melting, the power of 100kW is left to stand for 10 minutes to complete the refining; the power of the power is increased to 240kW, and pure metal Fe, Al is used as an alloy material, smelted for 8 minutes, and then left to stand for 15 minutes with a power supply of 80kW; after that, the temperature of the melt is raised until the conjunctiva ruptures, and then pouring is started, and the pouring time is controlled within 7 minutes to obtain an alloy ingot, that is, the alloy compo...

Embodiment 3

[0042] A kind of Mn-Cu based micro-nano porous high damping alloy, its preparation method comprises:

[0043] (1) Put pure metal Mn and Cu as raw materials in an intermediate frequency vacuum induction furnace, evacuate to below 10Pa, continue to pump after power transmission and preheating, so that the vacuum degree is always kept below 10Pa; The room is filled with argon to make the pressure reach 0.002MPa, and at the same time, the metal raw material is melted rapidly with a power of 280kW. After melting, the power of 90kW is left to stand for 10 minutes to complete the refining; the power of the power is increased to 200kW, and pure metal Ni is added as For alloy materials, smelt for 10 minutes, and then stand still for 20 minutes with a power supply of 60kW; then raise the temperature of the melt until the conjunctiva ruptures, and then start pouring, and the pouring time is controlled within 6 minutes to obtain an alloy ingot, that is, the alloy composition is 80wt% Mn ,...

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