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Continuous unidirectional solidification preparation method of in-situ reaction of nano-particle copper- ferroalloy

A nanoparticle, in-situ generation technology, applied in nanotechnology and other directions, to achieve the effect of good mechanical properties

Active Publication Date: 2014-10-22
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is rarely reported that the in-situ precipitated nano-dispersion strengthening phase can be obtained directly in the tissue through directional solidification.

Method used

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  • Continuous unidirectional solidification preparation method of in-situ reaction of nano-particle copper- ferroalloy
  • Continuous unidirectional solidification preparation method of in-situ reaction of nano-particle copper- ferroalloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The mass percentage of copper alloy composition in this experiment is (98%) Cu, (2%) Fe.

[0022] Step 1: After the raw materials are cleaned and removed, they are placed in a graphite crucible, and the vacuum induction furnace is evacuated to 10 -3 After Pa, set the temperature to 350°C, heat it to the set temperature, keep it warm for 20 minutes and dry it. After drying, evacuate the vacuum induction furnace to 10 -3 Pa discharges the gas;

[0023] Step 2: Vacuum the vacuum induction furnace to 10 -3 Pa and raise the temperature to 1225°C to heat and melt. After the metal raw material is completely melted, introduce high-purity argon, keep it warm for 30 minutes and turn on the cooling system;

[0024] Step 3: Adjust the cooling water volume to 900L / h, adjust the casting speed to 1.5mm / 10s, and then turn on the traction system. Observe the melt temperature during the casting process to ensure that the temperature is kept at 1250°C ± 5°C.

[0025] Step 4: The bill...

Embodiment 2

[0028] The mass percentage of copper alloy composition in this experiment is (99.5%) Cu, (0.5%) Fe.

[0029] Step 1: After the raw materials are cleaned and removed, they are placed in a graphite crucible, and the vacuum induction furnace is evacuated to 10 -3 After Pa, set the temperature to 350°C, heat it to the set temperature, keep it warm for 20 minutes and dry it. After drying, evacuate the vacuum induction furnace to 10 -3 Pa discharges the gas;

[0030] Step 2: Vacuum the vacuum induction furnace to 10 -3 Pa and raise the temperature to 1250°C to heat and melt. After the metal raw material is completely melted, introduce high-purity argon, keep it warm for 30 minutes and turn on the cooling system;

[0031] Step 3: Adjust the cooling water volume to 900L / h, adjust the casting speed to 3mm / 10s, and then turn on the traction system. Observe the melt temperature during the casting process to ensure that the temperature is kept at 1250°C ± 5°C.

[0032] Step 4: The bi...

Embodiment 3

[0034] The mass percentage of copper alloy composition in this experiment is (99%) Cu, (1%) Fe.

[0035] Step 1: After cleaning and removing impurities, the raw materials are placed in a graphite crucible. After the vacuum induction furnace is evacuated to 0.001Pa, the temperature is set at 350°C, heated to the set temperature, and then kept for 20 minutes for drying. After drying, evacuate the vacuum induction furnace to 0.001Pa again to discharge the gas;

[0036] Step 2: Vacuumize the vacuum induction furnace to 0.001Pa and raise the temperature to 1200°C to heat and melt. After the metal raw material is completely melted, introduce high-purity argon, keep it warm for 30 minutes and turn on the cooling system;

[0037] Step 3: Adjust the cooling water volume to 900L / h, adjust the casting speed to 2.5mm / 10s, and then turn on the traction system. Observe the melt temperature during the casting process to ensure that the temperature is kept at 1300°C ± 5°C.

[0038] Step 4: ...

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Abstract

The invention belongs to the field of mental materials and relates to a continuous unidirectional solidification preparation method of in-situ reaction of nano-particle copper- ferroalloy. The process comprises putting raw materials into a graphite crucible after cleaning and purification, vacuumizing a vacuum melting furnace to 10-3Pa and beginning heating and melting; leading high-purity argon into the vacuum melting furnace after the raw materials are fully melted, maintaining melt temperature to be in a range of 1200 + / -5 DEG C to 1300+ / -5 DEG C and meantime starting a cooling system, enabling cooling water amount to be 900L / h and preparing blank in a downward-drawing type continuous unidirectional solidification device at a casting speed of 1.5-3mm / 10s. By means of the continuous unidirectional solidification preparation method of the in-situ reaction of the nano-particle copper- ferroalloy, in-situ nano-particles coherent or semi-coherent with a collective interface can be directly produced in a continuous unidirectional solidification process, and the nano-particles are evenly dispersed and distributed in a substrate.

Description

technical field [0001] The invention belongs to the field of metal materials and relates to a continuous directional solidification preparation method for in-situ generation of nano particle Cu-Fe alloy. Background technique [0002] Nano-block metal materials have high strength, but their elongation is low. Nano-particle dispersion-strengthened metal materials can greatly increase the strength of the alloy while maintaining the elongation of the alloy, and its strengthening effect is better than that of traditional The micron-scale and sub-micron-scale second-phase particle dispersion strengthening used in metal materials, and the study of nano-disperse phase-strengthened alloys have become a hot spot in recent years. Nano-strengthening can not only greatly improve the strength of metal materials, but also improve the high-temperature creep properties of superalloys. Nanostrengthening technology has important application value for metal materials used in a wide range of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B82Y40/00
Inventor 王自东史国栋
Owner UNIV OF SCI & TECH BEIJING
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