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Preparation method and application of directionally solidified cu-cr alloy without band structure

A technology of directional solidification and banded structure, applied in the field of directional solidification Cu-Cr alloy preparation, can solve the problems of Cu-Cr alloy performance degradation, non-uniformity, integrity damage, etc., to achieve comprehensive performance improvement and weaken segregation behavior , the effect of eliminating band tissue

Active Publication Date: 2020-02-21
JIANGXI UNIV OF SCI & 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 provide a method for preparing a directionally solidified Cu-Cr alloy without a banded structure, which solves the problem that the banded structure in the prior art will destroy the integrity of the solidified structure of the Cu-Cr alloy, causing Cu-Cr Alloy performance degradation and non-uniformity issues

Method used

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  • Preparation method and application of directionally solidified cu-cr alloy without band structure
  • Preparation method and application of directionally solidified cu-cr alloy without band structure
  • Preparation method and application of directionally solidified cu-cr alloy without band structure

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Embodiment 1

[0033]The weighed Cr is 0.2% of the total mass of copper and Cu-Cr alloy, and the copper and Cu-Cr alloys are put into the medium frequency induction furnace for melting at 1250°C, and the melt temperature is lowered to 1100°C for casting. The ingot size It is φ80mm; the ingot is extruded into a φ16mm alloy rod by an extruder, and then a φ11mm alloy rod is prepared by cold drawing and deformation. The motor power of the extruder is 150KW, the extrusion force is 5000KN, and the extrusion speed The speed of the drawing machine is 25mm / s, the preheating power is 12KW, the speed of the drawing machine is 1480r / min, the power is 87KW, the voltage is 880V, and the transmission ratio is 40.17; the alloy rod is placed in an argon-protected annealing furnace for homogenization Annealing, the annealing temperature is set to 850°C, the holding time is 4 hours, water quenching is carried out after the annealing treatment; the alloy rod is pickled and put into the ceramic tube in the direct...

Embodiment 2

[0035] The weighed Cr is 0.8% of the total mass of copper and Cu-Cr alloy, and the Cu-Cr alloy is put into the medium frequency induction furnace for melting at 1300 ° C, and the melt temperature is lowered to 1150 ° C for casting. The ingot size It is φ80mm; the ingot is extruded into a φ16mm alloy rod by an extruder, and then a φ11mm alloy rod is prepared by cold drawing and deformation. The motor power of the extruder is 150KW, the extrusion force is 5000KN, and the extrusion speed The speed of the drawing machine is 25mm / s, the preheating power is 12KW, the speed of the drawing machine is 1480r / min, the power is 87KW, the voltage is 880V, and the transmission ratio is 40.17; the alloy rod is placed in an argon-protected annealing furnace for homogenization Annealing, the annealing temperature is set to 900 ° C, the holding time is 3 hours, after the annealing treatment, water quenching is carried out; the alloy rod is pickled and put into the ceramic tube in the directional...

Embodiment 3

[0037] The weighed Cr is 1.5% of the total mass of copper and Cu-Cr alloy, and the copper and Cu-Cr alloys are sequentially put into the medium frequency induction furnace for melting at 1350°C, and the melt temperature is lowered to 1200°C for casting. The ingot size It is φ80mm; the ingot is extruded into a φ16mm alloy rod by an extruder, and then a φ11mm alloy rod is prepared by cold drawing and deformation. The motor power of the extruder is 150KW, the extrusion force is 5000KN, and the extrusion speed The speed of the drawing machine is 25mm / s, the preheating power is 12KW, the speed of the drawing machine is 1480r / min, the power is 87KW, the voltage is 880V, and the transmission ratio is 40.17; the alloy rod is placed in an argon-protected annealing furnace for homogenization Annealing, the annealing temperature is set to 950°C, the holding time is 2 hours, water quenching is carried out after the annealing treatment; the alloy rod is pickled and put into the ceramic tube...

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Abstract

The invention discloses a preparation method and application of a directional solidification Cu-Cr alloy without a banded structure. The preparation method is implemented according to the following steps: firstly, medium-frequency induction melting casting is carried out; an alloy rod is prepared through extrusion drawing deformation; homogenizing annealing is carried out in an annealing furnace,and water quenching is carried out after annealing; and after water quenching, surface deoxidation acid pickling is carried out, the alloy rod is placed in a directional solidification furnace to be subjected to directional solidification, and a directional solidification alloy rod without the banded structure is prepared. According to the preparation method, the banded structure generated due tosolute segregation in directional solidification can be obviously removed under the precondition that performance of directional solidification structures is not affected, the preparation method is applicable to Cu-Cr alloys with different components and has quite good universality and effectiveness, and the Cu-Cr alloy with continuous columnar crystal structures can be easily acquired.

Description

technical field [0001] The invention belongs to the technical field of preparation of new non-ferrous metal materials, in particular to a preparation method and application of a directionally solidified Cu-Cr alloy without band structure. Background technique [0002] Directional solidification refers to the use of forced means in the solidification process to establish a temperature gradient in a specific direction in the solidified metal and unsolidified metal melt, so that the melt solidifies in the direction opposite to the heat flow, and finally obtains a columnar crystal with a specific orientation. Technology. Directional solidification technology is widely used in superalloys, magnetic materials, single crystal growth, and self-generated composites because it can better control the grain orientation of the solidified structure during the solidification process, eliminate the transverse grain boundaries, and improve the longitudinal mechanical properties of the materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/03C22F1/08
CPCC22C1/03C22C9/00C22F1/002C22F1/08
Inventor 李勇朱靖王莹段超男易鹏许方胡咏梅
Owner JIANGXI UNIV OF SCI & TECH