Carbide Fragmentation and Dissolution in a High-Carbon High-Chromium Steel Using Hot Rolling Process: Microstructure Evolution, Wear, High-Temperature Oxidation, and Chloride-Induced Corrosion Properties

CORROSION ◽  
10.5006/2749 ◽  
2018 ◽  
Vol 74 (9) ◽  
pp. 958-970 ◽  
Author(s):  
Majid Shahsanaei ◽  
Sadegh Pour-Ali ◽  
Ali-Reza Kiani-Rashid ◽  
Sannakaisa Virtanen
Keyword(s):  
High Temperature ◽  
Corrosion Behavior ◽  
Hot Rolling ◽  
High Temperature Oxidation ◽  
Rolling Process ◽  
High Carbon ◽  
Corrosion Properties ◽  
Temperature Oxidation ◽  
High Chromium ◽  
Hot Rolling Process

A series of hot rolling processes with different reduction percentages (10%, 30%, and 50%) were applied to a high-carbon high-chromium tool steel (2HCTS). Microstructural evolutions, wear behavior, high-temperature oxidation, and aqueous corrosion properties were investigated. The results revealed the breakage and dissolution of primary carbides and a uniform carbide distribution after the hot rolling process. It was proposed that the presence of higher amounts of dissolved chromium in the hot rolled samples leads to the formation of Cr-rich oxides with more protection and less porosity at high temperatures, as well as an improved corrosion behavior in 3.5 wt% NaCl solution. This improvement in the corrosion behavior is not at the expense of the degradation of wear resistance. Probable mechanisms for carbides dissolution are also discussed.

The Oxide Defect of C70250 Alloy

2014 ◽  
Vol 936 ◽  
pp. 1168-1172 ◽  
Author(s):  
Zhong Ping Chen ◽  
Chao Jian Xiang ◽  
Hua Qing Li
Keyword(s):  
High Temperature Oxidation ◽  
Rolling Process ◽  
Pilot Scale ◽  
Processing Temperature ◽  
Skin Defect ◽  
Test Results ◽  
Temperature Oxidation ◽  
Reducing Atmosphere ◽  
Hot Rolling Process ◽  
Oxide Skin

The oxide skin defect during hot rolling process for Cu-Ni-Si alloy strip was investigated. Oxide skin defects were analyzed by means of alloy elements detection and microstructures characterization. The characterization and test results showed that high temperature oxidation and silicon segregation are the main causes of the oxide skin defect. Pilot scale tests indicated that hot processing temperature for C70250 alloy should be lower than 950°C. Reducing atmosphere is recommended during the thermal treatment of Cu-Ni-Si alloys.

scholarly journals High-temperature Oxidation of Fe-Cr Steels in Steam Condition – A Review

2016 ◽  
Vol 1 (1) ◽  
pp. 107 ◽  
Author(s):  
Tedi Kurniawan ◽  
Farah Alia Binti Fauzi ◽  
Yuli Panca Asmara
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Power Plants ◽  
Oxidation Behavior ◽  
Deep Understanding ◽  
Oxidation Mechanism ◽  
Corrosion Properties ◽  
Temperature Oxidation ◽  
Boiler Environment ◽  
Cr Steels

The development of supercritical (SC) and ultra-supercritical (USC) power plants requires materials with better corrosion properties. Deep understanding on the oxidation mechanism in the boiler environment is one of the important factors to support this development. In this work, high temperature oxidation of Fe-Cr steels in steam condition is reviewed.  Several mechanisms that explain the effect of water vapor in the oxidation behavior the steel were presented.

scholarly journals Effect of Arc Currents on the Mechanical, High Temperature Oxidation and Corrosion Properties of CrSiN Nanocomposite Coatings

Coatings ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 40
Author(s):  
Yanxiong Xiang ◽  
Changwei Zou
Keyword(s):  
High Temperature ◽  
Friction Force ◽  
High Temperature Oxidation ◽  
Nanocomposite Coatings ◽  
Corrosion Properties ◽  
Temperature Oxidation ◽  
Polarization Impedance ◽  
Large Particles ◽  
Arc Current ◽  
Oxidation And Corrosion

In methods for multi-arc ion plating technology, the behavior and characteristics of the arc spot determine the physical characteristics of arc plasma and the properties of the subsequent deposited coatings. In this paper, the effect of arc currents on the hardness, friction coefficient, high temperature oxidation, and corrosion properties of the CrSiN coatings was studied. According to the XRD and SEM results, with the increase of arc currents, the coatings grew preferentially to the CrN (111) crystal direction, and the CrN (220) crystal phase appeared at high currents of 90 A. In addition, the number of large particles increased when the current exceeded 70 A. The HR-TEM results confirmed the formation of nanocomposite structure of nanocrystalline of CrN embedded into the amorphous phase of Si3N4 as explored by XRD. The maximum hardness was achieved at 3120 Hv when the coatings were deposited under currents around 70 A. However, the hardness values decreased with further increase of arc currents. From the contact of ceramic balls with the wear of coatings, the surface of coatings gradually produced friction marks, and the friction force increased from a steady friction force to a dynamic friction force. The high temperature oxidation results showed that fewer oxides were formed on the surface of the coatings when oxidized at 800 °C. It was also found that CrSiN nanocomposite coatings prepared at an arc current of 70 A had a larger corrosion potential and polarization impedance, which could effectively protect the tool matrix.

Sign in / Sign up

Export Citation Format

Share Document