Influence of high-velocity oxygen fuel spraying and plasma nitriding on microstructure properties of iron-nickel-chromium alloy using hybrid surface heat treatment

2019 ◽  
Vol 6 (8) ◽  
pp. 086584 ◽  
Author(s):  
R Ganapathy Srinivasan ◽  
R Selvabharathi ◽  
S Palani ◽  
R Karuppasamy
Keyword(s):  
Heat Treatment ◽  
High Velocity ◽  
Plasma Nitriding ◽  
Surface Heat ◽  
Chromium Alloy ◽  
High Velocity Oxygen Fuel ◽  
Nickel Chromium ◽  
Iron Nickel ◽  
Oxygen Fuel

Influence of Heat Treatment on Corrosion Resistance of High-Velocity Oxygen-Fuel Sprayed WC-17Co Coatings on 42CrMo Steel

2015 ◽  
Vol 24 (9) ◽  
pp. 3218-3227 ◽  
Author(s):  
Wan-chang Sun ◽  
Pei Zhang ◽  
Feng Zhang ◽  
Chu-xu Dong ◽  
Ju-mei Zhang ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Corrosion Resistance ◽  
High Velocity ◽  
High Velocity Oxygen Fuel ◽  
42Crmo Steel ◽  
Oxygen Fuel

scholarly journals The Effect of Heat Treatment on the Corrosion Resistance of Fe-Based Amorphous Alloy Coating Prepared by High Velocity Oxygen Fuel Method

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7818
Author(s):  
Chun-Ying Lee ◽  
Hung-Hua Sheu ◽  
Leu-Wen Tsay ◽  
Po-Sen Hsiao ◽  
Tzu-Jing Lin ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Corrosion Resistance ◽  
Amorphous Alloy ◽  
High Velocity ◽  
Annealing Temperature ◽  
Annealing Treatment ◽  
Alloy Coating ◽  
Corrosion Current ◽  
High Velocity Oxygen Fuel ◽  
Oxygen Fuel

In this study, Fe40Cr19Mo18C15B8 amorphous coatings were prepared using high velocity oxygen fuel (HVOF) technology. Different temperatures were used in the heat treatment (600 °C, 650 °C, and 700 °C) and the annealed coatings were analyzed by DSC, SEM, TEM, and XRD. XRD and DSC results showed that the coating started to form a crystalline structure after annealing at 650 °C. From the SEM observation, it can be found that when the annealing temperature of the Fe-based amorphous alloy coating reached 700 °C, the surface morphology of the coating became relatively flat. TEM observation showed that when the annealing temperature of the Fe-based amorphous alloy coating was 700 °C, crystal grains in the coating recrystallized with a grain size of 5–20 nm. SAED analysis showed that the precipitated carbide phase was M23C6 phase with different crystal orientations (M = Fe, Cr, Mo). Finally, the corrosion polarization curve showed that the corrosion current density of the coating after annealing only increased by 9.13 μA/cm2, which indicated that the coating after annealing treatment still had excellent corrosion resistance. It also proved that the Fe-based amorphous alloy coating can be used in high-temperature environments. XPS analysis showed that after annealing FeO and Fe2O3 oxide components increased, and the formation of a large number of crystals in the coating resulted in a decrease in corrosion resistance.

COLMONOY NO. 43HV

Alloy Digest ◽  
2008 ◽  
Vol 57 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
High Velocity ◽  
Base Alloy ◽  
Heat Treating ◽  
High Velocity Oxygen Fuel ◽  
Nickel Base Alloy ◽  
Nickel Base ◽  
Oxygen Fuel

Abstract Colmonoy No. 43HV comprises a nickel-base alloy recommended for hard surfacing parts to resist wear, corrosion, heat, and galling. Deposits that have moderate hardness have increased ductility and slightly less resistance to abrasion than Colmonoy 53HV. Deposits can be finished by grinding or machined with carbide tooling. Colmonoy No. 43HV is supplied as an atomized powder specially sized for application with high-velocity oxygen fuel (HVOF) systems. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance and surface qualities as well as heat treating and surface treatment. Filing Code: Ni-664. Producer or source: Wall Colmonoy Corporation.

SANICRO 31

Alloy Digest ◽  
1965 ◽  
Vol 14 (9) ◽  
Keyword(s):  
Mechanical Properties ◽  
Petrochemical Industry ◽  
Elevated Temperatures ◽  
Heat Treating ◽  
Chromium Alloy ◽  
Good Resistance ◽  
Nickel Chromium ◽  
Temperature Performance ◽  
Iron Nickel ◽  
Corrosion And Oxidation

Abstract SANDVIK SANICRO 31 is an iron-nickel-chromium alloy having good resistance to corrosion and oxidation and good mechanical properties at elevated temperatures. It is recommended for electrical sheathing, pyrometer tubes, equipment for heat treating and furnace tubes and other equipment in the petrochemical industry. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-172. Producer or source: Sandvik.

Difference oxidation behaviors of Ni8Al and Ni25Cr coatings in air with water vapor at 650∘

2021 ◽  
pp. 2150274
Author(s):  
Dingjun Li ◽  
Wenlang Huang ◽  
Xiaohu Yuan ◽  
Taihong Huang ◽  
Chao Li ◽  
...  
Keyword(s):  
Water Vapor ◽  
High Velocity ◽  
Cyclic Oxidation ◽  
Oxidation Behaviour ◽  
Fuel Spray ◽  
High Velocity Oxygen Fuel ◽  
Service Environment ◽  
Generator Unit ◽  
Oxygen Fuel ◽  
Oxidation Behaviors

The oxidation behaviour of Ni8Al and Ni25Cr coatings produced by high velocity oxygen fuel spray (HVOF) which were deposited on Fe-based alloys (CB2) was investigated. We simulated the service environment of the steam generator unit, and put the samples in a thermostatic tube furnace at 650[Formula: see text] in air with 20 wt.% water vapor for 1000 hours of cyclic oxidation. The formation mechanism are explained using SEM, XRD, and EDX. There were no spallations and obvious cracks in both coatings. Ni25Cr coating generated a better protection oxides scale than that scale on Ni8Al. The behavior and mechanism of the oxide scale formation had an important influence in coatings and we have discussed these phenomenons in the study.

Sign in / Sign up

Export Citation Format

Share Document