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Continuous preparation method for iron base amorphous strips

An iron-based amorphous and thin strip technology, applied in the field of amorphous alloy preparation, can solve the problem of no specific process protection nodes and technical implementation plans, melting temperature, heat preservation measures, cooling speed, casting and rolling force and other detailed parameters have not been disclosed and other problems, to achieve the effect of inhibiting the formation and growth of crystal nuclei, small deformation, and large cooling rate

Active Publication Date: 2019-05-31
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent (publication number CN1486800A) discloses a continuous casting and rolling technology of bulk amorphous alloys. The metal melt melted in the crucible is injected into two relatively rotating water-cooled rolls, and a bulk amorphous plate is prepared by double-roll casting and rolling. , rods, etc., but the patent does not see specific process protection nodes and technical implementation plans, and does not disclose detailed parameters such as melting temperature, heat preservation measures, flow control measures, cooling speed, casting and rolling force, etc.

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  • Continuous preparation method for iron base amorphous strips
  • Continuous preparation method for iron base amorphous strips
  • Continuous preparation method for iron base amorphous strips

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Alloy composition: Fe 69 C 5 Si 3 B 5 P 8 Cr 3 Al 2 Mo 5 (atomic percentage at.%, the same below);

[0040] Distribution method: deep into the roll gap;

[0041] Preparation process:

[0042] a. Prepare 20kg of raw material according to the atomic percentage, put it into a vacuum induction melting furnace, and evacuate it to 0.05Pa, heat the alloy raw material until it is completely melted, and continue melting at 1500°C for 10 minutes.

[0043] b. Turn off the vacuum pump, fill the vacuum induction melting furnace with high-purity argon with a volume purity of 99.999% to atmospheric pressure, open the gate valve, put down the guide tube, and pass the alloy through the guide tube (the preheating temperature of the guide tube 1000℃) into the tundish protected by high-purity argon.

[0044] c. After the alloy is soaked in the tundish, open the stopper, and evenly distribute the alloy melt through the distribution nozzle (the preheating temperature of the distrib...

Embodiment 2

[0049] Alloy composition: Fe 69 C 5 Si 3 B 5 P 8 Cr 3 Al 2 Mo 5 ;

[0050] Distribution method: deep into the roll gap;

[0051] Preparation process:

[0052] a. Prepare 20kg of raw material according to the atomic percentage, put it into a vacuum induction melting furnace, and evacuate it to 0.03Pa, heat the alloy raw material until it is completely melted, and continue melting at 1500°C for 20 minutes.

[0053] b. Turn off the vacuum pump, fill the vacuum induction melting furnace with high-purity argon with a volume purity of 99.999% to atmospheric pressure, open the gate valve, put down the guide tube, and pass the alloy through the guide tube (the preheating temperature of the guide tube 900°C) into the tundish protected by high-purity argon.

[0054] c. After the alloy is soaked in the tundish, open the stopper, and evenly distribute the alloy melt through the distribution nozzle (the preheating temperature of the distribution nozzle is 1200°C) into the gap of ...

Embodiment 3

[0059] Alloy composition: Fe 69 C 5 Si 3 B 5 P 8 Cr 3 Al 2 Mo 5 ;

[0060] Distribution method: deep into the roll gap;

[0061] Preparation process:

[0062] a. Prepare 20kg of raw material according to the atomic percentage, put it into a vacuum induction melting furnace, and evacuate it to 0.08Pa, heat the alloy raw material until it is completely melted, and continue melting at 1400°C for 20 minutes.

[0063] b. Turn off the vacuum pump, fill the vacuum induction melting furnace with high-purity argon with a volume purity of 99.999% to atmospheric pressure, open the gate valve, put down the guide tube, and pass the alloy through the guide tube (the preheating temperature of the guide tube 950°C) into the tundish protected by high-purity argon.

[0064] c. After the alloy is soaked in the tundish, open the stopper, and evenly distribute the alloy melt through the distribution nozzle (the preheating temperature of the distribution nozzle is 1200°C) into the gap of ...

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Abstract

The invention belongs to the field of amorphous alloy preparation, and in particular, relates to a method for continuously preparing iron base amorphous strips by using a double-roller process. Firstly, alloy raw materials or primarily prepared mother alloys are smelted in a vacuum induction smelting furnace to obtain iron base amorphous mother alloy melts; and after the temperature control meetsrequirements, argon is injected, a gate valve between the vacuum induction smelting furnace and a tundish is opened, and the melts are introduced in the tundish with high-purity argon protection through a preheating runner. After a flow control plug rod of the tundish is opened, the alloy melts are uniformly distributed by a flow distribution nozzle and injected into roller gaps of casting rollersto cool through water cooling casting rollers to form the amorphous strips; and the amorphous strips are continuously cooled by roller rows and introduced into winding equipment. The whole casting-cooling-winding process is finished in a high-purity argon shielded casting machine cavity. The amorphous forming process is short in flow, high in cooling speed and continuous in preparation process; and the method can efficiently and continuously prepare the iron base amorphous strips, and promotes the application of iron base amorphous alloys.

Description

technical field [0001] The invention belongs to the field of amorphous alloy preparation, and in particular relates to a method for continuously preparing iron-based amorphous alloy thin strips by using a double-roller method. Background technique [0002] Amorphous alloy, also known as metallic glass or glassy alloy, is a new type of special alloy material whose material state is obviously different from that of crystalline state, which is prepared by modern rapid solidification metallurgy technology. Due to the unique atomic structure arrangement and metal bond composition of amorphous alloys, amorphous alloys have better mechanical, physical and chemical properties than traditional crystalline metal materials. This makes amorphous alloys have broad application prospects in aerospace, weapon industry, precision instruments, biomedicine and power transmission. [0003] The preparation of early amorphous alloys required a large cooling rate (>10 6 K / s), at that time, am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02B22D11/06B22D11/14
Inventor 张晨阳袁国张元祥王洋康健李振磊王黎筠王国栋
Owner NORTHEASTERN UNIV
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