Composite film layer with sandwich structure and preparation method of composite film layer

A composite film and sandwich technology, which is applied in the field of titanium alloy coating, can solve the problems of poor wear resistance of the film layer and easy agglomeration of intermetallic compounds, etc., and achieve the effect of fast and convenient process

Active Publication Date: 2021-01-05
XINDA KECHUANG TANGSHAN PETROLEUM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome when carrying out heat treatment, because of Kirkendall effect, in Ni / Cu / Ni plating layer, Ti, Ni and Cu atom carry out long-distance interdiffusion and produce a large number of vacancy defects, and vacancies are interconnected and aggregated to form large holes or Cracks, and intermetallic compounds are prone to agglomeration, resulting in the shortcomings of poor wear resistance of the film layer, providing a composite film layer with a sandwich structure and its preparation method

Method used

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  • Composite film layer with sandwich structure and preparation method of composite film layer
  • Composite film layer with sandwich structure and preparation method of composite film layer
  • Composite film layer with sandwich structure and preparation method of composite film layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1) Clean the TC4 titanium alloy sample

[0045] Put the alkali of TC4 titanium alloy sample in the cleaning solution to remove the surface grease;

[0046] 2) Ni plating

[0047] Put the TC4 titanium alloy in the electroplating solution for electroplating, and then wash it with running water to deposit Ni coating on the surface of the TC4 titanium alloy; the electroplating conditions are: temperature is room temperature, electroplating voltage is 3V, electroplating time is 10min; per 1L 80g Ni in the plating solution 2 SO 4 , 70g Na 2 SO 4 , 30g MgSO 4 , 30g NaCl and 30g H 3 BO 3 ;

[0048] 3) Vacuum heat treatment

[0049] Vacuum heat treatment was carried out on the TC4 titanium alloy deposited with Ni coating on the surface, the vacuum heat treatment temperature was 350° C., and the time was 30 min.

[0050] 4) Electroplating Cu

[0051] Place the heat-treated sample in the electroplating solution for electroplating, and after washing with running water, t...

Embodiment 2

[0072] 1) Clean the TC4 titanium alloy sample

[0073] Put the alkali of TC4 titanium alloy sample in the cleaning solution to remove the surface grease;

[0074] 2) Ni plating

[0075] Put the TC4 titanium alloy in the electroplating solution for electroplating, and then wash it with running water to deposit Ni coating on the surface of the TC4 titanium alloy; the electroplating conditions are: temperature 30°C, electroplating voltage 3V, electroplating time 10min; 80g Ni in 1L electroplating solution 2 SO 4 , 70g Na 2 SO 4 , 30g MgSO 4 , 30g NaCl and 30g H 3 BO 3 ;

[0076] 3) Vacuum heat treatment

[0077] Vacuum heat treatment was carried out on the TC4 titanium alloy with Ni coating deposited on the surface. The vacuum heat treatment temperature was 300°C, the time was 40min, and the pressure was 1×10 -2 Pa.

[0078] 4) Electroplating Cu

[0079] Place the heat-treated sample in the electroplating solution for electroplating, and after washing with running water...

Embodiment 3

[0092] 1) Clean the TC4 titanium alloy sample

[0093] Put the alkali of TC4 titanium alloy sample in the cleaning solution to remove the surface grease;

[0094] 2) Ni plating

[0095] Place the TC4 titanium alloy in the electroplating solution for electroplating, and then wash it with flowing water to deposit Ni coating on the surface of the TC4 titanium alloy; the electroplating conditions are: temperature 35°C, electroplating voltage 3V, electroplating time 10min; 80g Ni in 1L electroplating solution 2 SO 4 , 70g Na 2 SO 4 , 30g MgSO 4 , 30g NaCl and 30g H 3 BO 3 ;

[0096] 3) Vacuum heat treatment

[0097] Vacuum heat treatment was performed on the TC4 titanium alloy deposited with Ni coating on the surface, the vacuum heat treatment temperature was 33° C., and the time was 35 min.

[0098] 4) Electroplating Cu

[0099] Place the heat-treated sample in the electroplating solution for electroplating, and after washing with running water, the Ni / Cu coating can be...

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Abstract

The invention discloses a composite film layer with a sandwich structure and a preparation method of the composite film layer, and belongs to the field of titanium alloy coatings. According to the preparation method, a titanium alloy is electroplated with a Ni/Cu/Ni composite coating of the sandwich structure, and then vacuum circulation heat treatment is conducted, so that titanium atoms, nickelatoms and copper atoms in the composite coating diffuse mutually, and holes formed by transition and migration of the atoms are gathered; the temperature is increased from 300-350 DEG C to 500-550 DEGC, heat preservation is conducted for 30-40 min, so that the titanium atoms, the nickel atoms and the copper atoms form NixTiy and CuxTiy intermetallic compounds, and stress concentration and microcracks caused by interatomic rapid phase change are avoided; the temperature is increased from 500-550 DEG C to 750-800 DEG C, and heat preservation is conducted for 30-40 minutes, so that the intermetallic compounds further grow, disperse and diffuse; and cooling with a furnace is conducted, and the compact sandwich structure film layer in which the NixTiy and CuxTiy intermetallic compounds are dispersedly distributed is formed.

Description

technical field [0001] The invention belongs to the field of titanium alloy coatings, in particular to a composite film layer with a sandwich structure and a preparation method thereof. Background technique [0002] TC4 titanium alloy has poor surface wear resistance, high friction coefficient, low thermal conductivity, and is prone to adhesive wear, which in turn destroys the integrity of titanium alloy workpieces. Continued use may lead to major engineering accidents and huge economic losses Therefore, it is necessary to improve the thermal conductivity and wear resistance of the TC4 titanium alloy surface. At present, the method of preparing a high-hardness diffusion layer on the surface of titanium alloy is usually used to improve its wear resistance. [0003] Ni and Cu have good ductility, which can improve the brittle fracture ability of the film layer. The heat treatment process can form a series of high-hardness intermetallic compounds in the film layer to increase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/14C25D3/12C25D3/38C25D5/50
CPCC25D3/12C25D3/38C25D5/14C25D5/50
Inventor 陈永楠王楠张震杨泽慧徐义库姜超平赵秦阳张勇
Owner XINDA KECHUANG TANGSHAN PETROLEUM EQUIP CO LTD
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