Application of plasma transferred arc and spray and fuse coatings to enhance hardness and wear resistance of AISI 1045 steel

Name: Saifon Srisaart.

keyword: PTA.

LCSH: Plasma spraying.

; Plasma Transferred Arc.

LCSH: Steel -- Corrosion.

LCSH: Corrosion and anti-corrosives.

LCSH: Protective coatings.

Abstract: This This work presented the results of an investigation of the single-layer and bilayer PTA and SF coating processes of two different based powders (Fe and Ni) for ID fan turbine applications. As the major damage type was erosive wear, the application of hardfacing could be the solution to improve the wear resistance. Therefore, in addition to hard Fe and Ni based powder, this work further improved the surface hardness of the coating by adding 35, 50, and 60% of WC to reduce erosive wear. Microstructure and hardness were studied. Moreover, the repetitive impact and tribometer tests were used to predict the lifetime of the coatings. For single layer and bilayer coatings in the SF process, the microstructure was obviously separated into substrate and coating, or bond coat and topcoat layer. The microstructure was uniform across thickness and hardness. For single layer and bilayer coatings in the PTA process, the microstructure at the interface between substrate and coating, or bond coat and top coat, was slightly different due to the faster cooling rate, and the hardness at this area was lower than in other areas due to the dilution effect. After adding WC to the powder, it could be seen that WC particles were distributed across the coating. The crack was found after adding 50% and 60% of WC. The hardness was increased due to the dilution and dissolution of some WC during the process. The repetitive impact and tribology test results showed that the wear rate and volume loss of the single layer coating after adding WC for both processes were lower than those of non-adding WC and bilayer coating due to the higher hardness than in other cases. The results of the two based powders (Fe and Ni) showed no significant difference. According to the results, the PTA process is more suitable for impact applications than the SF process due to the coating's good bonding, no cracks, only some small pores, and acceptable hardness.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Name: Karuna Tuchinda

Role: thesis advisor.

Email : karuna.t@tggs.kmutnb.ac.th

Created: 2023

Modified: 2567-12-16

Issued: 2024-12-16

วิทยานิพนธ์/Thesis

application/pdf

eng

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Mechanical Engineering Simulation and Design (International Program)

Grantor: King Mongkut's University of Technology North Bangkok

©copyrights King Mongkut's University of Technology North Bangkok

ลำดับที่.	ชื่อแฟ้มข้อมูล	ขนาดแฟ้มข้อมูล	จำนวนเข้าถึง	วัน-เวลาเข้าถึงล่าสุด
1	B17676927.pdf	3.05 MB

ใช้เวลา

0.029156 วินาที