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Component design method of multi-component bulk iron-based amorphous alloy material

An iron-based amorphous alloy and composition design technology, applied in the field of amorphous alloy materials, can solve problems such as helplessness, and achieve the effects of wide application, strong corrosion resistance and high hardness

Inactive Publication Date: 2009-12-30
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, although many theories about amorphous formation have been proposed so far, few of them can be applied to the design of amorphous components. Some previous prediction methods are only applicable to components with fewer components. There is nothing to do with the design of components, especially amorphous components with more than quaternary components

Method used

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  • Component design method of multi-component bulk iron-based amorphous alloy material
  • Component design method of multi-component bulk iron-based amorphous alloy material
  • Component design method of multi-component bulk iron-based amorphous alloy material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Example 1: FeCr 10 Mo 12 B 8 C system

[0063] Step 1: Define the elements Fe, Cr, Mo, C, and B from the thermodynamic database, and use Thermol-calc commercial phase diagram calculation software to calculate the Fe-C longitudinal section pseudo-binary phase diagram.

[0064] Step 2: Adjust the viewing range so that the range of C content coordinates just includes the eutectic point, such as figure 1 shown.

[0065] Step 3: It can be observed that the primary crystal phase near the liquidus line is HCP, and there is a MoB phase at the eutectic point. In the interval above the nose temperature of the hypereutectic point, HCP, BCC, and M7C3 are the pre-precipitated phases, basically Meet the requirements of the size of the subcooling interval of each precipitated phase.

[0066] Step 4: Select the C 16at% place slightly over the eutectic point, determine the composition, calculate the BPW diagram, and obtain the precipitation amount of each phase during solidificatio...

Embodiment 2

[0068] Example 2: FeCr 18 Mo 16 B 8 C system

[0069] Step 1: Define the elements Fe, Cr, Mo, C, and B from the thermodynamic database, and use Thermol-calc to calculate the pseudo-binary phase diagram of Fe-C longitudinal section.

[0070] Step 2: Adjust the viewing range so that the range of C content coordinates just includes the eutectic point, such as image 3 shown.

[0071] Step 3: It can be observed that the primary crystal phase near the liquidus line is HCP 3 , the BCC phase is formed after a small degree of undercooling, and the HCP, BCC, M 23 C 6 It is a pre-precipitated phase, which basically meets the requirements for the size of the supercooling interval of each precipitated phase.

[0072] Step 4: Select the C 12at% place slightly over the eutectic point, determine the composition, calculate the BPW diagram, and obtain the precipitation amount of each phase during solidification, such as Figure 4 shown. It can be seen that the requirements are met in ...

Embodiment 3

[0074] Example 3: FeCr 18 Mo 18 W 2 B 7 C system

[0075] Step 1: Define the elements Fe, Cr, Mo, W, C, and B from the thermodynamic database, and use Thermol-calc to calculate the pseudo-binary phase diagram of Fe-C longitudinal section.

[0076] Step 2: Adjust the viewing range so that the range of C content coordinates just includes the eutectic point, such as Figure 5 shown.

[0077] Step 3: It can be observed that the primary crystal phases near the liquidus line are BCC and HCP 3 , the MoB phase is formed after a small degree of undercooling, and the HCP, BCC, M 23 C 6 , M6C is a pre-precipitated phase, which basically meets the requirements of the size of the subcooling interval of each precipitated phase.

[0078] Step 4: Select the C 12at% place slightly over the eutectic point, determine the composition, calculate the BPW diagram, and obtain the precipitation amount of each phase during solidification, such as Image 6 shown. It can be seen that the requir...

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Abstract

The invention discloses a component design method of a multi-component bulk iron-based amorphous alloy material, and relates to an amorphous alloy material and provides a component design method of a multi-component bulk iron-based amorphous alloy material with high glass forming capability. The component design method comprises the following steps of: according to influences of different elements to precipitated phases, defining proper elements from thermodynamics database as adding elements, calculating a Fe-C longitudinal section pseudo-binary diagram by using Thermol-calc commercial phase diagram calculation software; adjusting the temperature and component coordinate of the pseudo-binary diagram, leading the carbon content coordinate range to contain eutectic points and determining component lines from the pseudo-binary diagram; observing initial phases near a liquid phase line and precipitated phases near the temperature of nasal tip, judging whether to meet the requirements of being beneficial to amorphously forming the precipitated phases, if so, selecting carbon atom content near the eutectic points, determining final components, calculating a phase fraction diagram, further obtaining data of precipitation amount of all the phases, and finally preparing amorphous alloy according to components; and if no, returning.

Description

technical field [0001] The invention relates to an amorphous alloy material, in particular to a composition design method of a multi-element bulk iron-based amorphous alloy material with high glass forming ability. Background technique [0002] Metallic glasses are usually formed by cooling molten metal below the glass transition temperature and solidifying before nucleation and crystallization. Normally metals and alloys crystallize to form crystals when cooled from a liquid state. However, certain metals and alloys have been found to remain extremely viscous when solidified, inhibiting crystallization when cooled rapidly enough, typically at rates of 10 per second. 4 ~10 6 The magnitude of K. To achieve such high cooling rates, molten metals or alloys can only be sprayed onto conductive substrates that conduct heat very well. The alloy thus obtained is amorphous, but very small in size. Therefore, the previously obtained amorphous alloy materials are thin strips obtai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02
Inventor 刘兴军韩佳甲王翠萍张锦彬黄艺雄马云庆施展
Owner XIAMEN UNIV
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