Effect of CrTiAlN Coatings on High-Temperature Oxidation Behavior of H13 Steel

2013 ◽  
Vol 544 ◽  
pp. 343-346
Author(s):  
Hao Zhang ◽  
Shu Wang Duo ◽  
Xiao Yan Fei ◽  
Xiang Min Xu ◽  
Ting Zhi Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Protective Layer ◽  
Hard Coatings ◽  
Bonding Layer ◽  
Closed Field ◽  
H13 Steel ◽  
Columnar Crystal ◽  
Temperature Oxidation

CrTiAlN hard coatings have been deposited on H13 steel for improving the oxidation resistance by Closed Field Unbalanced Magnetron Sputter Ion Plating (CFUMSIP). The phase components, surface and section morphology of H13 steel before and after oxidation were analyzed by XRD and SEM. The results showed that the columnar crystal film possesses three major parts, i.e., the internal Cr bonding layer, the intermediate CrN transition layer, the external CrTiAlN gradient coating. The selective oxidation of Cr element was found on the surface of uncoated H13 steel while oxidation, but a continuous protective layer was not formed because of low Cr content, finally a lot of alpha Fe2O3 particles took place on the surface of H13 steel owing to the oxidation of the matrix element. O element can diffuse much more easily through the coating and oxide scales at 800 °C, and spallation and cracks were not found during the oxidation. These results indicated that the CrTiAlN coating have excellent high-temperature oxidation resistance at 800 °C.

Properties of Electrospark Deposited Cr Coatings on AISI H13 Steel

2012 ◽  
Vol 472-475 ◽  
pp. 288-292
Author(s):  
Cean Guo ◽  
Jian Zhang ◽  
Li Yang ◽  
Wei Zhou ◽  
Hong Hui Sun
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Wear Behavior ◽  
H13 Steel ◽  
Electrospark Deposition ◽  
Temperature Oxidation ◽  
Aisi H13 Steel ◽  
Aisi H13 ◽  
Steel Substrates

Cr coatings were deposited on AISI H13 steel substrates by means of electrospark deposition (ESD). The coatings were characterized in terms of their microstructure, hardness, friction and wear behavior and high-temperature oxidation resistance. Micro-indentation and tribometer testers were employed to measure the mechanical properties of Cr coatings and AISI H13 steel. The results showed that the hardness of the coatings ranged from 600 to 660 HV, with a higher value than that of AISI H13 steel (510 HV). The coefficient of steady-state friction of the coatings against 45-carbon-steel balls ranged from 0.23 to 0.27, with a lower value than that of AISI H13 steel (0.62-0.68). The isothermal oxidation behavior of the coatings at 850°Cwas studied in comparison with AISI H13 steel substrates. The results indicated that Cr coatings substantially increase the high-temperature oxidation resistance of AISI H13 steel and the oxidation process was retarded mainly by the presence of a Cr2O3 oxide scale on the coatings at 850°C for 100 hours.

Improving the high-temperature oxidation resistance of H13 steel by laser cladding with a WC/Co-Cr alloy coating

2016 ◽  
Vol 63 (3) ◽  
pp. 171-176 ◽  
Author(s):  
Xiaodong Zhang ◽  
Xiaohua Jie ◽  
Liuyan Zhang ◽  
Song Luo ◽  
Qiongbin Zheng
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Oxidation Resistance ◽  
Laser Cladding ◽  
High Temperature Oxidation ◽  
Steel Substrate ◽  
Alloy Coating ◽  
H13 Steel ◽  
Temperature Oxidation ◽  
Content Type

Purpose This paper aims to discuss that a WC/Co-Cr alloy coating was applied to the surface of H13 steel by laser cladding. Design/methodology/approach The oxidation behavior of the WC/Co-Cr alloy coating at 600°C was investigated by comparing it with the performance of the steel substrate to better understand the thermal stability of H13 steel. Findings The results showed that the WC/Co-Cr alloy coating exhibited better high-temperature oxidation resistance and thermal stability than did uncoated H13 steel. The coated H13 steel had a lower mass gain rate and higher microhardness than did the substrate after different oxidation times. Originality/value The WC/Co-Cr alloy coating was composed of e-Co, CW3, Co6W6C, Cr23C6 and Cr7C3; this mixture offered good thermal stability and better high-temperature oxidation resistance.

scholarly journals Study on the Pre-Oxidation and Resulting Oxidation Mechanism and Kinetics of Mo-9Si-8B Alloy

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5309
Author(s):  
Cheng Wang ◽  
Qiuliang Li ◽  
Zhenping Guo ◽  
Xiangrong Li ◽  
Xiangyu Ding ◽  
...  
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Cyclic Oxidation ◽  
Initial Period ◽  
Oxidation Mechanism ◽  
Protective Layer ◽  
Temperature Oxidation ◽  
Locking Mechanism ◽  
Kinetics Of

Molybdenum silicon boron alloy is regarded as the next generation of superalloy that is expected to replace nickel-based superalloys. However, the high-temperature oxidation resistance of Mo-Si-B alloy has always been an issue worth studying. In this study, Mo-9Si-8B alloy was prepared via a plasma oscillatory pressure sintering process and pre-oxidized at 1300 °C while maintaining a certain balance of mechanical and oxidation properties. The influence of the oxide protective layer on its performance at high temperature of 1150 °C was explored, the micro-mechanism of its performance and its failure mode of the hinge-locking mechanism was illustrated, and finally, its oxidation kinetics was inferred. In conclusion, pre-oxidized Mo-9Si-8B (at.%) alloy did play a role in delaying the oxidation process during the initial period of cyclic oxidation. However, with the increase of cyclic oxidation time, the improvement of high-temperature oxidation resistance was limited.

Improvement of Slurry Aluminide Coating on Ferritic Stainless Steel AISI430 for High-Temperature Oxidation Resistance

2015 ◽  
Vol 658 ◽  
pp. 86-90
Author(s):  
Piyorose Promdirek ◽  
Mack Boonpensin ◽  
Thanapon Rojasawasatien
Keyword(s):  
High Temperature ◽  
Surface Morphology ◽  
Oxidation Resistance ◽  
Oxidation Rate ◽  
High Temperature Oxidation ◽  
Aluminide Coating ◽  
Protective Layer ◽  
Growth Effect ◽  
Effect Of Temperature ◽  
Temperature Oxidation

One of the surface modification processes for high-temperature oxidation resistance is slurry aluminizing process, forming protective layer of alumina (Al2O3). However, several important parameters such as annealing times and temperatures should be intensively considered. The objective of this study is to improve the process of slurry aluminide coating of ferritic stainless steels type AISI430 (16%Cr) combat to high-temperature oxidation. The specimens were cut, then ground, and finally sprayed with slurry mixture (Al powder + polyvinyl alcohol (PVA)). They were annealed in Ar at 1100°C for 15 minutes in order to eliminate PVA and form aluminide on their suface. The protective layer Al2O3 was finally formed in the temperature range of 900-1100 °C for 15-60 minutes. The cyclic oxidation tests were performed at 1000 °C for 24 hours. The surface morphology were then examined by XRD, SEM equipped EDS. The results showed that all oxidation kinetics of coated specimens were parabolic. The oxidation rate of uncoated specimens was apparently higher than that of coated specimens. Comparing with all coated specimens, the oxidation rate decreased with the increasing temperature and annealing time. In this study, the coating process at 1100°C for 60 minutes exhibited the lowest oxidation rate due to the most complete layer of Al2O3. The surface morphology showed the formation of continuous layer of Fe2Al5 and Al2O3, acting as barrier layer to oxide growth. Effect of temperature and time on oxidation resistance were discussed in this study.

AK STEEL 441

Alloy Digest ◽  
2006 ◽  
Vol 55 (6) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Ferritic Stainless Steel ◽  
High Temperature Oxidation ◽  
High Temperature Strength ◽  
Temperature Oxidation ◽  
Temperature Performance

Abstract AK Steel 441 has good high-temperature strength, an equiaxed microstructure, and good high-temperature oxidation resistance. The alloy is a niobium-bearing ferritic stainless steel. This datasheet provides information on composition, hardness, and tensile properties as well as deformation. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-965. Producer or source: AK Steel.

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