Cobalt-based amorphous nanocrystal biphase metal fiber and preparation method thereof

An amorphous nanocrystalline and metal fiber technology is applied in the field of cobalt-based amorphous nanocrystalline dual-phase metal fibers and their preparation, which can solve the problems of poor tensile plasticity of cobalt-based amorphous fibers, and reduce process difficulty and process cost. , high tensile strength, simple principle effect

Inactive Publication Date: 2012-07-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the basic problem of poor tensile plasticity of existing micron-scale cobal

Method used

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  • Cobalt-based amorphous nanocrystal biphase metal fiber and preparation method thereof
  • Cobalt-based amorphous nanocrystal biphase metal fiber and preparation method thereof
  • Cobalt-based amorphous nanocrystal biphase metal fiber and preparation method thereof

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specific Embodiment approach 1

[0026] Embodiment 1: This embodiment is a cobalt-based amorphous nanocrystalline dual-phase metal fiber, and the nominal composition of the cobalt-based amorphous nanocrystalline dual-phase metal fiber is Co 68.15 Fe 4.35 Si 12.25 B 15.25 A crystalline phase with a size of 4-20 nanometers is dispersed on the amorphous matrix of the cobalt-based amorphous nanocrystalline dual-phase metal fiber, and the volume fraction of the crystalline phase is 5%-85%.

[0027]The yield strength of the cobalt-based amorphous nanocrystalline dual-phase metal fiber in this embodiment is 1208-2108 MPa, the fracture strength is 3044-3976 MPa, and the tensile plastic strain is 0.36%-1.64%.

[0028] The cobalt-based amorphous nanocrystalline dual-phase metal fiber of this embodiment has high thermal stability and high tensile strength, especially the amorphous nanocrystalline dual-phase metal fiber with significant plastic strain, so it has good application prospects .

specific Embodiment approach 2

[0029] Specific embodiment two: This embodiment is the preparation method of cobalt-based amorphous nanocrystalline dual-phase metal fiber as described in specific embodiment one, which is realized by the following steps: 1. According to the nominal composition of Co 68.15 Fe 4.35 Si 12.25 B 15.25 Weigh Co, Fe, Si and B respectively, and then smelt the weighed Co, Fe, Si and B to make a preform with a diameter of 6-10mm, and then put the preform into the precision melt to draw the metal amorphous wire In the device, an amorphous metal fiber with a diameter of 55 to 65 microns is prepared; 2. The amorphous metal fiber prepared in step 1 is subjected to multi-pass cold drawing with a deformation amount of 5% to 75% using a diamond cold drawing die treatment to obtain cobalt-based amorphous nanocrystalline dual-phase metal fibers.

[0030] The yield strength of the cobalt-based amorphous nanocrystalline dual-phase metal fiber in this embodiment is 1208-2108 MPa, the fracture s...

specific Embodiment approach 3

[0036] Specific implementation mode three: the difference between this implementation mode and specific implementation mode two is that step one is specifically completed in the following steps: form Co according to the name 68.15 Fe 4.35 Si 12.25 B 15.25 Weigh Co, Fe, Si and B respectively, and then smelt the weighed Co, Fe, Si and B to make a preform with a diameter of 6-10mm, and then put the preform into the precision melt to draw the metal amorphous wire In the BN crucible of the device, the induction heating device is used to melt the preform to form a molten alloy with steamed bun-shaped protrusions, and then at 1150°C, the lifting device is used to raise the molten alloy at a speed of 90 μm / s until the molten alloy The top is in contact with a rotating metal roller with a linear speed of 15m / min, and is drawn and rounded into filaments to prepare amorphous metal fibers with a diameter of 55-65 microns; wherein the metal roller is a copper wheel with a diameter of 160...

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Abstract

The invention relates to cobalt-based amorphous nanocrystal biphase metal fiber and a preparation method thereof, and is used for solving the problem that the traditional micro-scale cobalt-based amorphous fiber has poor tensile ductility. The nominal composition of the biphase metal fiber is Co68.15Fe4.35Si12.25B15.25; and 5-85vol% of crystalline phase with size of 4-20 nm is dispersed and distributed on an amorphous substrate of the cobalt-based amorphous nanocrystal biphase metal fiber. The cobalt-based amorphous nanocrystal biphase metal fiber is obtained by carrying out multiple cold drawing treatments on amorphous metal fiber obtained by a precision device for drawing melt into metal wire. According to the invention, the yield strength of the biphase metal fiber is 1208-2108 MPa, the fracture strength is 3044-3976 MPa and the tensile plastic strain is 0.36-1.64%; the preparation method has simple and convenient preparation process; and the application space of the cobalt-based amorphous fiber material is expanded.

Description

technical field [0001] The invention relates to a cobalt-based amorphous nanocrystalline dual-phase metal fiber and a preparation method thereof. Background technique [0002] Due to its unique long-range disorder and short-range order structure, amorphous alloys have many excellent properties: high strength and hardness, large elastic strain limit and good elastic storage capacity, excellent magnetic and electrochemical properties , which is considered to be the most potential class of structural and functional materials. However, due to the localization of shear bands caused by strain softening, amorphous alloys have low plasticity (especially tensile plasticity) at room temperature, and catastrophic fractures generally occur after exceeding the elastic limit, which limits the application of this type of material. application range. Therefore, improving the plasticity of this type of material, especially the tensile plasticity, has become a frontier and hot spot in the r...

Claims

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Application Information

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IPC IPC(8): C22C45/04B22D11/06C21D8/06B21C1/00
Inventor 孙剑飞王欢邢大伟曹福洋
Owner HARBIN INST OF TECH
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