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Copper-chromium alloy surface grain refining and strengthening method

A copper-chromium alloy and grain refinement technology is applied in the field of grain refinement and strengthening of the copper-chromium alloy surface, which can solve the problems of difficult mass popularization, complicated cleaning process, high cost, and achieve the improvement of machining performance and surface hardness. and anti-fatigue, performance-enhancing effects

Inactive Publication Date: 2018-07-06
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] CN201610414239.2 provides a method for preparing a superhard strengthening layer on the surface of a copper-chromium alloy. The method is to form a high hardness, high wear resistance and The alloyed layer with high withstand voltage strength belongs to the field of material surface treatment and strengthening technology; however, it is not given the specific parameters of pulse laser processing, and because the range of copper-chromium alloys to be processed is too wide, there are many problems in the preparation. At the same time, because the cleaning process in the early stage of treatment is too complicated and the cost is high, it is not easy to promote in large quantities

Method used

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Embodiment 1

[0028] Embodiment 1: a method for refining and strengthening copper-chromium alloy surface grains, mainly comprising:

[0029] Step 1: Preparation of Copper-Chromium Alloy

[0030] According to the following composition and weight percentage: Cr is 15wt%, Zn is 2wt%, Mg is 0.5wt%, Co is 0.04wt%, and the balance is copper. It is smelted to make a copper-chromium alloy. After the smelting is completed, it is poured into an ingot , cooled to room temperature, and ready to use; Cu is added by copper plate, Cr is added by Cu-Cr intermediate alloy, Zn is added by zinc ingot, Mg is added by magnesium strip, Co is added by cobalt powder; smelting adopts non-vacuum intermediate frequency Induction electric furnace smelting; after the copper plate and Cu-Cr intermediate alloy are smelted, add zinc ingots, then add magnesium strips, and finally add cobalt powder;

[0031] Step 2: Copper-chromium alloy surface treatment

[0032] Clean and dry the copper-chromium alloy to be used to ensu...

Embodiment 2

[0039] Embodiment 2: a method for refining and strengthening copper-chromium alloy surface grains, mainly comprising:

[0040] Step 1: Preparation of Copper-Chromium Alloy

[0041]According to the following composition and weight percentage: Cr is 16wt%, Zn is 3wt%, Mg is 0.8wt%, Co is 0.05wt%, and the balance is copper. Melting is made into copper-chromium alloy. After the smelting is completed, it is poured into an ingot , cooled to room temperature, and ready to use; Cu is added by copper plate, Cr is added by Cu-Cr intermediate alloy, Zn is added by zinc ingot, Mg is added by magnesium strip, Co is added by cobalt powder; smelting adopts non-vacuum intermediate frequency Induction electric furnace smelting; after the copper plate and Cu-Cr intermediate alloy are smelted, add zinc ingots, then add magnesium strips, and finally add cobalt powder;

[0042] Step 2: Copper-chromium alloy surface treatment

[0043] Clean and dry the copper-chromium alloy to be used to ensure t...

Embodiment 3

[0050] Embodiment 3: a method for refining and strengthening copper-chromium alloy surface grains, mainly comprising:

[0051] Step 1: Preparation of Copper-Chromium Alloy

[0052] According to the following composition and weight percentage: 18wt% of Cr, 4wt% of Zn, 1wt% of Mg, 0.06wt% of Co, and copper as the balance, smelting is carried out to make copper-chromium alloy, and after the smelting is completed, it is poured into an ingot, Cool to room temperature and wait for use; Cu is added by copper plate, Cr is added by Cu-Cr intermediate alloy, Zn is added by zinc ingot, Mg is added by magnesium strip, Co is added by cobalt powder; smelting adopts non-vacuum intermediate frequency induction Electric furnace smelting; after the copper plate and Cu-Cr intermediate alloy are smelted, add zinc ingots, then add magnesium strips, and finally add cobalt powder;

[0053] Step 2: Copper-chromium alloy surface treatment

[0054] Clean and dry the copper-chromium alloy to be used t...

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Abstract

The invention discloses a copper-chromium alloy surface grain refining and strengthening method. The copper-chromium alloy surface grain refining and strengthening method mainly comprises copper-chromium alloy preparing, copper-chromium alloy surface treatment, laser strengthening equipment parameter setting, absorption protection layer arrangement and laser impact strengthening treatment. The performance of materials is further enhanced on the basis of an existing copper-chromium alloy preparing technology, a fine grain layer with fine particles and with high residual compressive stress is formed on the surface area of the copper-chromium alloy through the laser impact strengthening technology, on one hand, the copper-chromium surface structure is refined, the surface hardness is improved, and material serving is facilitated; and on the other hand, due to existence of the residual compressive stress, the surface hardness and fatigue resistance are improved, and the action of fine grain strengthening still exists even in the later period, the high temperature condition exists, and the residual compressive stress is released.

Description

technical field [0001] The invention relates to the technical field of alloy preparation, in particular to a method for refining and strengthening copper-chromium alloy surface grains. Background technique [0002] Alloys are substances with metallic properties that are synthesized by two or more metals and metals or nonmetals by a certain method. It is generally obtained by melting into a homogeneous liquid and solidifying. [0003] Metal alloy materials are widely used, among which copper alloy occupies a large proportion in the use of metal alloy materials. Copper alloys have high tensile strength and can be used in some professional directions that require high tensile properties of metal alloys. The tensile strength of conventional copper alloy materials is relatively low, usually only 400Mpa to 600Mpa, due to the low tensile strength of conventional alloy materials, its application is limited to some extent. [0004] Cu-Cr(-Zr) is a representative of the family of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D10/00C22C9/00C22F3/00
CPCC21D10/005C22C9/00C22F3/00
Inventor 张石松王小军师晓云赵俊刘凯李鹏王文斌李刚
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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