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Method for preparing ferronickel alloy containing short-range order structure

An iron-nickel alloy, short-range ordered technology, used in magnetic materials, electrical components, circuits, etc.

Inactive Publication Date: 2018-12-18
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is: the existing technology realizes L1 in iron-nickel alloy 0 The preparation of the phase is very difficult, which is due to the L1 0 Phase formation is limited by its unusually slow kinetics, making bulk materials almost impossible to form L1 under laboratory conditions 0 Mutually

Method used

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  • Method for preparing ferronickel alloy containing short-range order structure
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  • Method for preparing ferronickel alloy containing short-range order structure

Examples

Experimental program
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Effect test

Embodiment 1

[0012] The Fe-Ni alloy is prepared by pressing and forming, and compressed by a six-sided top, heated to 700°C, kept for one hour, cooled to room temperature, heated to 310°C, and held for one hour to obtain the alloy. Specific process: choose carbonyl iron powder and nickel powder as raw materials, nickel content 40-65%, use dry mixing method to mix the powder evenly; then wipe a layer of zinc stearate on the press mold, put the evenly mixed powder into the mold, the press pressure is 11GPa, the holding time is 5-6s, and the sample is taken out; the pressed sample is coated with a layer of alumina and then put into a vacuum sintering furnace for sintering at a sintering temperature of 1380°C. The sample density reaches 80-90%.

[0013] After the sintering of the sample is completed, the sample is placed in the six-sided top press, heated to 700°C by the six-sided top, and kept for one hour. After cooling to room temperature, it is heated to 310°C, kept for one hour, and the p...

Embodiment example 2

[0017] The Fe-Ni alloy is prepared by pressing and forming, and compressed by a six-sided top, heated to 700°C, kept for one hour, cooled to room temperature, heated to 310°C, and held for one hour to obtain the alloy. Specific process: choose carbonyl iron powder and nickel powder as raw materials, nickel content 40-65%, use dry mixing method to mix the powder evenly; then wipe a layer of zinc stearate on the press mold, put the evenly mixed powder into the mold, the press pressure is 11GPa, the holding time is 5-6s, and the sample is taken out; the pressed sample is coated with a layer of alumina and then put into a vacuum sintering furnace for sintering at a sintering temperature of 1380°C. The sample density reaches 80-90%.

[0018] After the sintering of the sample is completed, the sample is placed in the six-sided top press, heated to 700°C by the six-sided top, and kept for one hour. After cooling to room temperature, it is heated to 310°C, kept for one hour, and the p...

Embodiment 3

[0022] The Fe-Ni alloy is prepared by injection molding, compressed by a six-sided top, heated to 310°C, and kept for one hour to obtain the alloy. Specific process: select carbonyl iron powder and nickel powder as raw materials, nickel content 40-65%, put them in a four-tank dry mixer and mix evenly, then add an appropriate amount of oil-based binder according to the powder loading 55%, and dry mix to make it Mix evenly The mixed powder with the binder added is dry-mixed evenly, and then put into the mixing equipment for mixing, so that the metal powder and the binder are mixed evenly, and the feeding sample with good fluidity is obtained. Use injection molding After the machine completes the injection, by adjusting the injection temperature, mold temperature, injection pressure, and injection speed, a defect-free part injection base is obtained. After the injection base is obtained, the injection base is placed in n-heptane for solvent degreasing. After the injection base is ...

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Abstract

The invention provides a method for preparing a ferronickel alloy containing a short-range order structure; and the method uses a cubic press for pressing the ferronickel alloy. Generally, the orderedphase conversion conditions in a Fe-Ni system are more rigorous; and the sizes of L10 phases generated by traditional method are generally smaller, and are generally not more than 20 nm. The formation and the growth of the ordered phases L10 phases can be promoted by using cubic high-pressure and low-pressure insulation heat treatment, so that the saturation flux density of the alloy is improved;and the maximum saturation flux density is 1.57 T, so that the magnetic performance of the alloy is obviously improved. The method is simple in operation, lower in cost and simple in process, has noneed to add expensive rare earth elements, and can prepare low-cost and high-performance novel magnetic materials.

Description

technical field [0001] The invention belongs to the category of magnetic materials, and is related to an iron-nickel material, which contains rare L1 0 phase, with excellent magnetic properties, especially L1 with short-range order 0 Phase iron-nickel soft magnetic alloy and preparation method thereof. Background technique [0002] L1 in iron-nickel alloy 0 The phase has excellent magnetic properties, does not need to add expensive rare earth elements and cobalt elements, has low cost, and has the potential to become a new generation of magnetic materials. In the 1960s, L1 0 phase was first found in meteorites, but forms bulky L1 under natural conditions 0 Phases take hundreds of millions of years. For Fe-Ni alloys, the L1 of Fe-Ni 0 The phase order transition temperature is very low (<350°C), near this temperature, the diffusion of Fe and Ni is very difficult. Currently, only methods such as high-energy beam irradiation, nanoparticle technology, and mechanical all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10C21D6/00C22C1/04C22C33/02H01F1/147
CPCC21D6/001C22C1/0433C22C33/0285C22F1/10H01F1/14741
Inventor 娄嘉甘梦琦王鑫铭
Owner XIANGTAN UNIV