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Method for spraying enamel coating on titanium alloy surface through plasma technique and hot rolling treatment

A surface plasma and plasma technology, applied in the direction of metal material coating process, coating, molten spraying, etc., can solve the problems that cannot be directly used as spraying materials, poor fluidity, small powder particle size, etc., to achieve tight combination and reduce Pores and cracks, less porosity effect

Active Publication Date: 2017-03-22
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention proposes a method and casting process for preparing plasma enamel coating, thereby greatly improving the performance of the enamel coating, and solving the problem that the powder cannot be directly used as a spraying material due to its small particle size and poor fluidity

Method used

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  • Method for spraying enamel coating on titanium alloy surface through plasma technique and hot rolling treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 10% water and 3.5% polyacrylic acid dispersant to the prepared enamel powder to make it into a jelly. The volume fraction of solid matter in the jelly is 25%. The jelly is stirred for 10 minutes by mechanical stirring method. After stirring, use a hot air blower to dry the jelly. The efficiency of the hot air drying water is 7 kg / h. The particle size obtained after air drying is sprayed on the Ti-6Al-4V titanium alloy as a plasma spraying material. During the plasma spraying process, argon and a small amount of hydrogen are used as the main plasma spraying gas, and helium is used as a protective gas. After spraying, the sample was subjected to hot rolling treatment. The starting temperature was 300°C. After the sample was kept at 300°C for 30 minutes, it was rolled. There were 3 passes in total, and the total rolling ratio was 10%. The sample was placed in a tube furnace for annealing treatment under a hydrogen atmosphere at an annealing temperature of 500°C, and th...

Embodiment 2

[0019] Add 10% water and 3.5% polyacrylic acid dispersant to the prepared enamel powder to make it into a jelly. The volume fraction of solid matter in the jelly is 30%. The jelly is stirred for 15 minutes by mechanical stirring method. After stirring, use a hot air blower to dry the jelly. The efficiency of the hot air drying water is 7 kg / h. The particle size obtained after air drying is sprayed on the Ti-6Al-4V titanium alloy as a plasma spraying material. During the plasma spraying process, argon and a small amount of hydrogen are used as the main plasma spraying gas, and helium is used as a protective gas. After spraying, the sample was hot-rolled. The rolling temperature was 450°C. After the sample was kept at 450°C for 30 minutes, it was rolled. There were 4 passes in total, and the total rolling ratio was 15%. The sample was placed in a tube furnace for annealing treatment under a hydrogen atmosphere at an annealing temperature of 600°C, and the sample was cooled with ...

Embodiment 3

[0021] Add 10% water and 3.5% polyacrylic acid dispersant to the prepared enamel powder to make it into a jelly. The volume fraction of solid matter in the jelly is 35%. The jelly is stirred for 20 minutes by mechanical stirring method. After stirring, use a hot air blower to dry the jelly. The efficiency of the hot air drying water is 7 kg / h. The particle size obtained after air drying is sprayed on the Ti-6Al-4V titanium alloy as a plasma spraying material. During the plasma spraying process, argon and a small amount of hydrogen are used as the main plasma spraying gas, and helium is used as a protective gas. After spraying, the sample was hot-rolled. The rolling temperature was 550°C. After the sample was kept at 550°C for 30 minutes, it was rolled. There were 4 passes in total, and the total rolling ratio was 20%. The sample was placed in a tube furnace for annealing treatment under a hydrogen atmosphere, the annealing temperature was 650°C, and the sample was cooled with ...

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Abstract

A method for spraying an enamel coating on a titanium alloy surface through the plasma technique and hot rolling treatment are disclosed. The invention relates to a plasma spraying method for an enamel corrosion resistance coating and hot rolling treatment thereof and belongs to the technical field of plasma technologies and metal surface coating treatment. The defects such as holes, cracks, loose and nonuniform structures are serious problems existing in a present enamel coating obtained through the plasma technique, and at present, no good method can be used for solving the problems. According to preparation and hot rolling treatment of the plasma-sprayed enamel coating, the corrosion resistance coating which has few holes and cracks and a compact structure is prepared. In the process of coating preparation and hot rolling, the plasma spraying technology and the material hot rolling technology are combined effectively and in order, and compactness and uniformity of the coating are improved by taking advantage of the small particle size of powder. By means of the material hot rolling process, the coating structure is more compact and more uniform and the holes are further reduced under the powerful pressure effect of rolling force.

Description

technical field [0001] The invention relates to a method for plasma spraying an enamel corrosion-resistant coating and its hot rolling treatment, belonging to the technical fields of plasma technology and metal surface coating treatment. Background technique [0002] Plasma coating is a relatively new technology produced by the effective combination of plasma spraying technology and hot rolling technology. The preparation and post-treatment technology of enamel coating are explored and researched. At present, the most convenient research is mainly thermal barrier coating technology, and the research on corrosion-resistant plasma enamel coating, especially metal alloy corrosion-resistant plasma coating is still still less. [0003] Defects such as holes, cracks, and loose and uneven structures are a major problem in plasma enamel coatings. At present, there is no good way to solve this problem. From the current plasma enamel coatings in the field of thermal barrier coatings ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134C23C4/11C23C4/18C22F1/18
CPCC22F1/183C23C4/18
Inventor 钟庆东李育霖肖晨黄哲瑞孙金虎李辉
Owner SHANGHAI UNIV
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