The effects of yttrium addition on high-temperature oxidation of heat-resistant alloy with sulfur

2002 ◽  
Vol 344 (1-2) ◽  
pp. 394-400 ◽  
Author(s):  
T. Amano ◽  
H. Isobe ◽  
N. Sakai ◽  
T. Shishido
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Temperature Oxidation ◽  
Heat Resistant Alloy ◽  
Resistant Alloy ◽  
Heat Resistant ◽  
Yttrium Addition

scholarly journals The Sulfur Effects on High-temperature Oxidation of an Alumina-forming Heat-resistant Alloy

2004 ◽  
Vol 44 (1) ◽  
pp. 145-152 ◽  
Author(s):  
Tadaaki Amano ◽  
Toshiki Watanabe ◽  
Akira Hara ◽  
Naoki Sakai ◽  
Hisao Isobe ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Temperature Oxidation ◽  
Heat Resistant Alloy ◽  
Resistant Alloy ◽  
Heat Resistant

scholarly journals High-temperature oxidation of heat-resistant alloy purified by floating zone melting.

1999 ◽  
Vol 11 (1) ◽  
pp. 63-64
Author(s):  
Tadaaki AMANO ◽  
Toshinori SUGIYAMA ◽  
Hiromichi MAENO ◽  
Teruhisa SAITO ◽  
Takamasa SUGAWARA
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Zone Melting ◽  
Floating Zone ◽  
Temperature Oxidation ◽  
Heat Resistant Alloy ◽  
Resistant Alloy ◽  
Heat Resistant

MO-RE 40MA

Alloy Digest ◽  
1998 ◽  
Vol 47 (12) ◽  
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Creep Strength ◽  
Heat Resistant Alloy ◽  
Resistant Alloy ◽  
Heat Resistant ◽  
Temperature Performance

Abstract MO-RE 40MA is a fully austenitic heat-resistant alloy for elevated temperature applications. The alloy is microalloyed for creep strength and oxidation resistance. This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on high temperature performance. Filing Code: Ni-548. Producer or source: Duraloy Technologies Inc.

Magnetic Method for Rapid Detection of Carburization Degree of Fe-Cr-Ni Series High-Temperature Heat-Resistant Alloy

2021 ◽  
Author(s):  
Tao Chen ◽  
Xuedong Chen ◽  
Junhai Chen ◽  
Jihong Zhang ◽  
Chunjiao Liu
Keyword(s):  
High Temperature ◽  
Rapid Detection ◽  
Magnetic Method ◽  
Stable Operation ◽  
Detection Accuracy ◽  
Heat Resistant Alloy ◽  
Resistant Alloy ◽  
Heat Resistant ◽  
Temperature Heat ◽  
Ethylene Cracking Furnace

Abstract In view of the carburization of Fe-Cr-Ni high-temperature heat-resistant alloys in the ethylene cracking furnace and the hydrogen conversion furnace, this paper implemented the GMRI-I carburizing detector to test the degree of carburization of 25Cr35NiNb+ microalloy inlet pipe and 35Cr45NiNb+ microalloy outlet pipe of the ethylene cracking furnace after service as well as the reinforced joint made of Incoloy 800H from the hydrogen-making reformer. In conjunction with the results of the low-power acid corrosion test, a rapid detection method for the degree of carburization was proposed. Based on the experimental results of the carburizing detector and the laboratory test data, the carburization degree test curve of the above three alloys based on the magnetic field strength has been established. The detection accuracy was circa. 5% and the error was ±10%, which is convenient for guiding the use and replacement of Fe-Cr-Ni high-temperature heat-resistant alloy materials for ethylene cracking furnace and hydrogen conversion furnace, thereby ensuring the safe and stable operation of the device.

High-Temperature Oxidation Behaviors of 30Cr25Ni20Si Heat-Resistant Steel in Air

2020 ◽  
Vol 861 ◽  
pp. 83-88
Author(s):  
You Yang ◽  
Xiao Dong Wang
Keyword(s):  
High Temperature ◽  
Oxide Film ◽  
High Temperature Oxidation ◽  
Film Growth ◽  
Surface Oxidation ◽  
Mass Gain ◽  
Resistant Steel ◽  
Temperature Oxidation ◽  
Heat Resistant Steel ◽  
Heat Resistant

High temperature oxidation dynamic behaviors and mechanisms for 30Cr25Ni20Si heat-resistant steel were investigated at 800, 900 and 1000°C. The oxide layers were characterized by scanning electron microscopy (SEM-EDS), X-ray diffractometer (XRD). The results showed that the oxidation rate of test alloys is increased with increasing the oxidation time. The oxidation dynamic curves at 800 and 900°C follow from liner to parabolic oxidation law. The transition point is 10 h. At 1000°C, the steel exhibits a catastrophic oxidation, and the oxidation mass gain value at 50 h is 0.77 mg/cm2. This suggests that the steel at 900°C has formed a dense protective surface oxidation film, effectively preventing the diffusion of the oxygen atoms and other corrosive gas into the alloy. Therefore, at the first stage of oxidation, chemical adsorption and reaction determine the oxide film composition and formation process. At the oxide film growth stage, oxidation is controlled by migration of ions or electrons across the oxide film. When the spinel scale forms, it acts as a compact barrier for O element and improving the oxidation resistance.

scholarly journals Properties of High Temperature Oxidation of Heat-resistant Steel with Aluminium and Copper

2019 ◽  
Vol 25 (4) ◽  
pp. 394-400
Author(s):  
Hong LI ◽  
Chengzhi ZHAO ◽  
Tao YAN ◽  
Chao DING ◽  
Hexin ZHANG ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Oxide Films ◽  
Main Element ◽  
Resistant Steel ◽  
Temperature Oxidation ◽  
Heat Resistant Steel ◽  
X Ray ◽  
Heat Resistant ◽  
Test Steel

The research is focused on a novel aluminum and copper-containing heat-resistant steel. The steel was designed by the material performance simulation software JmatPro, performed high-temperature oxidation tests at 650 °C and 700 °C atmospheric conditions, and analyzed the high-temperature oxidation processes and its mechanisms.The phase transtions and surface morphology of the oxide films were studied using X-ray diffraction (XRD), electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The results showed that the equilibrium phase of the test steel is composed of γ phase and δ phase at 1050 °C and tranforms to tempered martensite and δ-Fe mixed structure after heat treatment. The preferential oxidation of Fe and Cr and the internal oxidation of Al occurred during the high temperature oxidation of the test steel. The oxide films were formed with various shape and weak bonding properties after high-temperature oxidation at 650℃. To the contrary, the oxide films more regular and evenly distributed, and has a certain protective effect after high-temperature oxidation at 700 ℃. The oxide films were divided into two layers, Fe2O3 is main element in the outer layer, the inner layer is mainly consisting the oxide of Cr. However, the addition of Cu element can promote the diffusion of Al and Si elements, which is beneficial to the formation of Al2O3 and SiO2 protective oxide films and excellent in high temperature oxidation resistance.

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