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Method for preparing metal transition layer by plasma cladding

A technology of plasma cladding and transition layer, applied in metal material coating process, coating, fusion spraying, etc., can solve the problems of difficult linking of titanium and iron, easy occurrence of brittle phase, poor composite property, etc., and achieve poor cladding accuracy , large cladding deformation and low equipment requirements

Inactive Publication Date: 2020-09-01
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the existing problems such as the difficulty in titanium-iron linking when preparing titanium and titanium alloy coatings on the surface of existing steel materials, such as easy occurrence of brittle phases, poor composite properties, difficult forming, many defects or high cost, the present invention provides A method for preparing metal transition layer by plasma cladding

Method used

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  • Method for preparing metal transition layer by plasma cladding
  • Method for preparing metal transition layer by plasma cladding
  • Method for preparing metal transition layer by plasma cladding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] The clean Q235 steel obtained after pretreatment is used as the base material, and the base material is placed on the plasma cladding workbench. Into the powder feeder of the plasma cladding equipment, using the method of synchronous powder feeding.

[0091] Set the plasma cladding process parameters as:

[0092] Working current 130A, working voltage 20V, scanning speed 0.08m / min, powder feeding gas (Ar) volume flow rate: 0.3m 3 / h, plasma working gas (Ar): 0.3m 3 / h, protective gas (Ar): 0.3m 3 / h.

[0093] Start the switch to start the plasma cladding preparation of the transition layer, and complete the preparation of the copper transition layer on the surface of the base material.

[0094] On this basis, after the same conventional surface pretreatment as that of the base material, including descaling and degreasing, the base material prepared with a copper transition layer is placed on the plasma workbench, and V Powder, gum arabic and deionized water are mixe...

Embodiment 2

[0105] The clean Q235 steel obtained after pretreatment is used as the base material, and the base material is placed on the plasma cladding workbench. Into the powder feeder of the plasma cladding equipment, using the method of synchronous powder feeding.

[0106] Set the plasma cladding process parameters as:

[0107] Working current 130A, working voltage 10V, scanning speed 0.06m / min, powder feeding gas (Ar) volume flow: 0.3m 3 / h, plasma working gas (Ar): 0.3m 3 / h, protective gas (Ar): 0.3m 3 / h.

[0108] Start the switch to start the plasma cladding preparation of the transition layer, and complete the preparation of the copper transition layer on the surface of the base material.

[0109] On this basis, after the same conventional surface pretreatment as that of the base material, including descaling and degreasing, the base material prepared with a copper transition layer is placed on the plasma workbench, and V Powder, gum arabic and deionized water are mixed eve...

Embodiment 3

[0119] Concrete steps are identical with embodiment 1, difference is:

[0120] During the preparation of the copper transition layer, the following plasma cladding parameters were changed:

[0121] Adjust the working current to 160A;

[0122] When preparing the titanium layer, change the following plasma cladding parameters:

[0123] Adjust the working current to 200A.

[0124] A titanium layer with copper and vanadium as the transition layer was prepared on the surface of Q235 steel.

[0125] According to GB / T6396-2008, the bonding strength between the prepared titanium layer and the Q235 steel base material was detected, recorded and compared with conventional commercially available titanium-coated Q235 steel.

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Abstract

The invention belongs to the technical field of metal surface processing, and particularly relates to a method for preparing a metal transition layer by plasma cladding. The method comprises the stepsof preparing the transition layer on a matrix material in a plasma cladding mode by adopting metal powder as a raw material; and performing the plasma cladding in cooperation with synchronous powderfeeding. On this basis, the method can also comprises the step of further preparing at least one layer of transition layer on the transition layer in the plasma cladding mode by taking the metal powder as the raw material. According to the method, through the mode that the plasma cladding is in cooperation with the synchronous powder feeding, the difficulty in iron-titanium linking is overcome; when the whole scheme is implemented, the cladding can be carried out in selected areas, and the process flexibility is improved while the cladding materials are saved; and when a titanium and titaniumalloy coating is subsequently prepared after the transition layer is prepared, defects such as air holes and cracks can be remarkably reduced, the bonding stability of the titanium and titanium alloycoating is enhanced, and the titanium and titanium alloy coating with excellent performance is obtained.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, in particular to a method for preparing a metal transition layer by plasma cladding. Background technique [0002] Titanium has excellent mechanical and chemical properties such as high specific strength, non-magnetic, corrosion resistance and good biocompatibility. It is widely used in aerospace, automotive, military, petrochemical, energy, biomedical and other fields, and has become a The country vigorously develops lightweight metal materials, but its price is relatively expensive, especially when it is used as a mechanism component, the problem is particularly prominent. In recent years, my country has vigorously developed aviation and oceans, and the demand for titanium and its products has become increasingly strong. However, my country's titanium resources are not rich, and are limited by the level of production technology, resulting in a large amount of titanium materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134C23C4/08C23C4/02
CPCC23C4/02C23C4/08C23C4/134
Inventor 孙冬柏俞宏英伍廉奎王世成王起吴海新
Owner SUN YAT SEN UNIV
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