Steel surface corrosion-resistant composite titanium alloy coating and preparation method thereof

A titanium alloy and corrosion-resistant technology, which is applied in the field of corrosion-resistant composite titanium alloy coating on the surface of steel and its preparation, can solve the problems of weak interface performance, large difference in thermal and physical properties, and deterioration of coating performance, so as to improve the bonding strength and surface Titanium content, good corrosion protection, improving the effect of highly brittle interfaces

Inactive Publication Date: 2021-10-01
SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The thermal physical properties of iron and titanium are very different, and brittle intermetallic compounds are easily formed during the metallurgical process, which leads to deterioration of coating performance. Direct cladding of titanium on steel can easily lead to weak interface properties and cracking.

Method used

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  • Steel surface corrosion-resistant composite titanium alloy coating and preparation method thereof
  • Steel surface corrosion-resistant composite titanium alloy coating and preparation method thereof
  • Steel surface corrosion-resistant composite titanium alloy coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A kind of corrosion-resistant composite titanium alloy coating on steel surface, its preparation method comprises the following steps:

[0033] 1) Surface roughening and cleaning of Q235 low carbon steel plate;

[0034] 2) Iron-based amorphous alloy powder Fe with a particle size of 50 μm to 200 μm 78 Si 9 B 13 (Atomic percentage) added to the laser cladding equipment, and then the iron-based amorphous powder Fe 78 Si 9 B 13 Cladding on the Q235 low-carbon steel plate treated in step 1), the cladding power is 1200W (for flat-top light with a laser spot diameter of 2.8mm), and the cladding overlap rate is 50%, forming an iron plate with a thickness of about 300 μm Based amorphous alloy coating (ie FeSiB transition layer);

[0035] 3) Put Ti6Al4V (grade: TC4) spherical powder with a particle size of 150 mesh to 300 mesh into the laser cladding equipment, and then cladding the Ti6Al4V spherical powder on the iron-based amorphous alloy coating formed in step 2), the c...

Embodiment 2

[0040] A kind of corrosion-resistant composite titanium alloy coating on steel surface, its preparation method comprises the following steps:

[0041] 1) Surface roughening and cleaning of Q235 low carbon steel plate;

[0042] 2) Iron-based amorphous alloy powder Fe with a particle size of 50 μm to 200 μm 73.5 Si 13.5 B 9 Nb 3 Cu (atomic percentage) is added to the laser cladding equipment, and then the iron-based amorphous powder Fe 73.5 Si 13.5 B 9 Nb 3 Cu cladding is carried out on the Q235 low-carbon steel plate treated in step 1), the cladding power is 1000W (for flat-top light with a laser spot diameter of 2.8mm), the cladding overlap rate is 50%, and a thickness of about 300 μm is formed. Iron-based amorphous alloy coating (ie FeSiBNbCu transition layer);

[0043] 3) Add titanium powder with a particle size of 50 μm to 150 μm into the laser cladding equipment, and then cladding the titanium powder on the iron-based amorphous alloy coating formed in step 2), the ...

Embodiment 3

[0047] A kind of corrosion-resistant composite titanium alloy coating on steel surface, its preparation method comprises the following steps:

[0048] 1) Surface roughening and cleaning of Q235 low carbon steel plate;

[0049] 2) Iron-based amorphous alloy powder Fe with a particle size of 50 μm to 200 μm 73.5 Si 13.5 B 9 Nb 3Cu (atomic percentage) is added to the laser cladding equipment, and then the iron-based amorphous powder Fe 73.5 Si 13.5 B 9 Nb 3 Cu cladding is carried out on the Q235 low-carbon steel plate treated in step 1), the cladding power is 1000W (for flat-top light with a laser spot diameter of 2.8mm), the cladding overlap rate is 50%, and a thickness of about 400 μm is formed. Iron-based amorphous alloy coating (ie FeSiBNbCu transition layer);

[0050] 3) Add titanium powder with a particle size of 50 μm to 150 μm into the laser cladding equipment, and then clad the titanium powder on the iron-based amorphous alloy coating formed in step 2), with a cl...

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Abstract

The invention discloses a steel surface corrosion-resistant composite titanium alloy coating and a preparation method thereof. The steel surface corrosion-resistant composite titanium alloy coating comprises an iron-based amorphous alloy coating and a titanium alloy coating which are sequentially arranged on the surface of steel. The preparation method of the steel surface corrosion-resistant composite titanium alloy coating comprises the following steps: preparing the iron-based amorphous alloy coating on the surface of the steel through a laser cladding technology, and then preparing the titanium alloy coating on the surface of the iron-based amorphous alloy coating through the laser cladding technology. According to the steel surface corrosion-resistant composite titanium alloy coating and the preparation method thereof, the corrosion-resistant composite titanium alloy coating composed of the iron-based amorphous alloy coating and the titanium alloy coating is prepared on the surface of the steel, the high-brittleness interface of the titanium alloy coating is effectively improved by utilizing the iron-based amorphous alloy coating, the bonding strength and the surface titanium content of the coating are improved, finally, good corrosion-resistant protection can be provided for the steel, and the steel surface corrosion-resistant composite titanium alloy coating has a good application prospect in the field of ocean engineering steel material protection.

Description

technical field [0001] The invention relates to the technical field of metal protection, in particular to a corrosion-resistant composite titanium alloy coating on the surface of steel and a preparation method thereof. Background technique [0002] The marine environment is highly corrosive to many metal materials (especially steel), and it is very important to take effective anti-corrosion measures to ensure the safe service of marine engineering equipment and facilities. The amount of steel materials used in ocean engineering is very large, and the protection of steel structures is the focus and difficulty in the development of ocean engineering materials. [0003] Titanium and titanium alloys have low density, high specific strength, and strong seawater corrosion resistance. They are marine engineering materials with excellent performance. However, due to the high cost of titanium alloy materials, it is difficult to directly apply them on a large scale. The combination o...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C45/02
CPCC23C24/106C23C24/103C22C45/02
Inventor 孙冬柏斯佳佳俞宏英高炜左蒋思之
Owner SUN YAT SEN UNIV
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