A kind of nitrogen doped toughened metallic glass composite material and preparation method thereof

A technology of composite material and metallic glass, which is applied in the field of nitrogen-doped toughened metallic glass composite material and its preparation, can solve the problems of reducing strength and achieve the effect of strong-plastic combination

Active Publication Date: 2016-09-14
NANJING BAOZUAN SPRING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the acquisition of the plasticity of the above-mentioned metallic glass composite material greatly reduces the strength

Method used

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  • A kind of nitrogen doped toughened metallic glass composite material and preparation method thereof
  • A kind of nitrogen doped toughened metallic glass composite material and preparation method thereof
  • A kind of nitrogen doped toughened metallic glass composite material and preparation method thereof

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preparation example Construction

[0026] A method for preparing a nitrogen-doped toughened metallic glass composite material of the present invention comprises the following steps:

[0027] The first step: select the alloy elements with a purity greater than 99.5%, and make the ratio according to the predetermined composition. First, use a non-consumable electric arc furnace to smelt TiN and Ti evenly in a non-consumable electric arc furnace to control the nitrogen content in the alloy, or use The alloy is smelted under a mixed atmosphere of argon and nitrogen to control the nitrogen content in the alloy, and then other elements are added to smelt together to homogenize the alloy composition and suction cast into a master alloy profile.

[0028] Step 2: Put the master alloy profile into the crucible, heat it by induction until it is completely melted, and perform overheating treatment to melt the impurity phase.

[0029] Step 3: Regulate the power of the induction melting furnace, lower the temperature to 850°...

Embodiment 1

[0044] (1) Selection of raw materials

[0045] The purity of each metal component that the present invention prepares master alloy ingot for selection is as table 1, and alloy composition is Ti 56 Zr 16 Nb 8.5 Cu 6 Al 3 be 10 N 0.5 (atomic percent).

[0046] Table 1 prepares the purity (%) of the metal component selected from the master alloy ingot

[0047]

[0048] (2) Preparation of master alloy ingot

[0049] Under the protection of high-purity argon gas, the master alloy button ingot is melted in a non-consumable arc melting furnace. The specific procedure is as follows:

[0050] a. After mechanically grinding the surface of the metal raw material to remove the oxide skin on the surface, prepare the material according to the designed composition ratio; put the prepared material into the water-cooled copper crucible in the melting furnace according to the weight of about 80g per ingot, cover Vacuum the upper furnace cover to 2×10 -3 Pa; Fill the furnace with a ...

Embodiment 2

[0061] Adopt the method identical with embodiment 1, alloy composition is Ti 58 Zr 17 Nb 9 Cu 4 Al 3 be 7.5 N 1.5 (atomic percent), kept at 850°C for 40 minutes, and then prepared at a pulling rate of 3mm / s, the composite sample with a diameter of 30mm had a uniform structure, and nearly spherical β-Ti with a size of about 40μm was uniformly distributed on the metallic glass substrate phase, its volume fraction is about 70%. The room temperature tensile strength and plastic strain of the composite reached 1180MPa and 8.5%, respectively.

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Abstract

The invention discloses a nitrogen doped toughened metallic glass composite material and a preparation method thereof, the atomic percentage expression of which is: Ti a Zr b Nb c Cu d al e be f N g , 52≤a≤60, 14≤b≤18, 7.5≤c≤9, 3≤d≤8, 2≤e≤4, 6≤f≤14, 0.5≤g≤2, a+b+c+d +e+f+g=100. The preparation method is as follows: smelting master alloy ingots and casting master alloy profiles; heating the master alloy profiles into a crucible until completely melted, and performing overheating to melt impurity phases; lowering the temperature to the solid-liquid two-phase region, and performing Solid-state treatment, so that the doped nitrogen element segregates into a solid solution in the first precipitated β ‑Ti, and control the morphology and size of the precipitated solid solution phase; then implement semi-solid rapid sequential solidification to form a high-strength and high-toughness large-scale metallic glass composite material. The invention prepares a high-strength and high-toughness large-size (30mm) metallic glass composite material, and the composite material has remarkable work hardening ability and excellent tensile strength and plasticity.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite materials, and relates to a nitrogen-doped toughened metallic glass composite material and a preparation method thereof. Specifically, on the basis of rationally designing alloy components, the doped nitrogen element is biased through a preparation process. The polysolid dissolves in the β-Ti phase that precipitates first to produce solid solution strengthening, thereby realizing the strong-plastic combination of the metallic glass composite material, and preparing a high-strength and high-tough metallic glass composite material. Background technique [0002] Bulk metallic glass (BMG) has a series of excellent mechanical properties different from traditional crystalline alloys, such as high strength, high hardness, low elastic modulus and large elastic strain limit, making it considered as a very potential structural material . However, the highly localized shear behavior allows BMG...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/10B22D1/00
Inventor 成家林云露
Owner NANJING BAOZUAN SPRING CO LTD
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