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

Zhang, Xiaodong; Jie, Xiaohua; Zhang, Liuyan; Luo, Song; Zheng, Qiu

doi:10.1108/acmm-11-2015-1606

Cited by 20 publications

(14 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ni presence in form of another protective layer helped in protecting the steel from corrosive attacks. Cr 2 O 3 oxide works as a barrier to separate the base metal and coating from reactive species (Da Silva et al , 2017; Zhang et al , 2016)…”

Section: Resultsmentioning

confidence: 99%

“…The microstructure of oxidized Ni-Cr P91 indicates the irregular shape of upper coating, showing formation of protective oxides of Cr and Ni [Figure 13(b)]. The pores present in the coating are blocked due to formation of oxides, due to which penetration of reacting species towards the base alloy was stopped (Singh et al , 2016; Da Silva et al , 2017; Zhang et al , 2016; Rao et al , 2016; Goyal and Goyal, 2016).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Improving the hot corrosion resistance of boiler tube steels by detonation gun sprayed coatings in actual boiler of thermal power plant

Singh

Goyal

2019

ACMM

View full text Add to dashboard Cite

Purpose This paper aims to investigate the hot corrosion behavior of Ni-Cr and Cr3C2-NiCr coatings, deposited on T11, P91 boiler steels by detonation gun spray coating (D-Gun) process to enhance high temperature corrosion resistance. Design/methodology/approach Hot corrosion studies were conducted in secondary super heater zone of boiler at 900 °C for 10 cycles on bare and D-Gun coated steel specimens. The microhardness and porosity values of as-sprayed coatings were measured before exposing the specimens in the boiler environment. Each cycle consisted 100 h of heating in the boiler environment followed by 20 min of cooling in air. The weight change measurements were performed after each cycle to establish the kinetics of corrosion using thermogravimetric technique. X-ray diffraction, SEM techniques were used to analyze the corroded specimens. Findings Uncoated boiler steel experienced higher weight loss. The Cr3C2-NiCr coating was found to be more protective than Ni-Cr coating. The phases revealed the formation of oxide scale on coated specimens, mainly consist of nickel and chromium, which are reported to be protective against the hot corrosion. Originality/value There is very limited reported literature on hot corrosion behavior of Ni-Cr and Cr3C2-NiCr coatings deposited on the T11 and P91 substrates by detonation gun (D-gun) spray technique. T11 and P91 alloy steels have been chosen for this study because these two alloys are used to manufacture boiler tubes used in Indian thermal power plants.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Improving the hot corrosion resistance of boiler tube steels by detonation gun sprayed coatings in actual boiler of thermal power plant

Singh

Goyal

2019

ACMM

View full text Add to dashboard Cite

show abstract

“…It is to establish compressive residual stress and harden the surface layer. Surface strengthening treatment methods used in engineering include surface heat treatment, surface chemical heat treatment, and surface coating strengthening [3]. Surface heat treatment includes flame quenching and induction quenching.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Limit of Custom 465 with Surface Strengthening Treatment

Liu

Yin

2020

Materials

View full text Add to dashboard Cite

In order to study the effect of nitriding or shot peening on the surface modification and fatigue properties of martensitic stainless-steel Custom 465, the residual stress and micro-hardness of the strengthened layer are determined by X-ray and micro-hardness tester, respectively. The up-and-down method is used to measure the rotational bending fatigue strength at 1 × 107 cycles, and the fatigue fracture characteristic is observed by scanning electron microscopy. The relationship between surface residual stress and internal fatigue limit of surface strengthening treatment is discussed. Results show that nitriding or shot peening surface strengthening layer forms a certain depth of compressive residual stress, where in the surface compressive residual stress of the nitrided specimens is greater than the shot peened specimens. The micro-hardness of the nitrided or shot peened surface strengthening layer is significantly improved, where in the surface micro-hardness of nitriding specimens are higher than shot peening specimens. The nitriding or shot peening surface strengthening can significantly improve the fatigue limit of Custom 465, wherein the fatigue limits of nitrided and shot peened surface strengthened specimens are 50.09% and 50.66% higher than that of the un-surface strengthened specimens, respectively. That is, the effect of the two strengthening methods on fatigue limit is not very different. The fracture characteristics show that the fatigue crack of the un-surface strengthened specimens originates from the surface, while the fatigue crack of surface strengthened specimens originates from the subsurface layer under the strengthened layer. The relationship between the internal fatigue limit and the surface residual stress of the surface strengthened specimen can be used as a method for predicting the fatigue limit of the surface strengthened specimens.

show abstract

“…Most reports focus on either nickel- or cobalt-based alloys, which are characterized by good corrosion resistance, excellent weldability, and thermal and chemical stability due to the high content of Cr and Mo. Superalloys like Inconel 625, 718, 738, and 786 (Ni-based) and Stellite 6, 12, and 21 (Co-based) are well known and liked for the above-mentioned properties [ 5 , 6 , 7 , 8 , 9 ]. Inconel 625 is extensively used in applications up to 650 °C due to its chemical composition (presented in Table 1 ).…”

Section: Introductionmentioning

confidence: 99%

Heating Conditions Influence on Solidification of Inconel 625–WC System for Additive Manufacturing

et al. 2020

View full text Add to dashboard Cite

In this study, an Inconel 625–tungsten carbide (WC) composite system was investigated by means of microstructure changes affected by both heating rate and WC content. In order to investigate how the system behaves while exposed to fast thermal processing, controlled melting using a differential thermal analysis (DTA) apparatus was performed on the powders. Two WC powders with different average grain size were used to obtain six compositions of Inconel 625–WC powder mixtures (10, 20, and 30 wt.% WC). They were analyzed under 10 and 30 °C/min heating rate in order to obtain composite samples. Results from DTA together with SEM/energy-dispersive X-ray spectroscopy (EDS) microstructural observations allowed observing material changes during solidification. Because of the extensive microsegregation of alloying elements to liquid and their reactions with C, which derived from dissolved WC, the formation of secondary phases with improved microhardness was possible. The collected results provide a better understanding of material behavior during intensive thermal processing which can be useful when designing materials for the laser additive manufacturing technique.

show abstract

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

Cited by 20 publications

References 24 publications

Improving the hot corrosion resistance of boiler tube steels by detonation gun sprayed coatings in actual boiler of thermal power plant

Improving the hot corrosion resistance of boiler tube steels by detonation gun sprayed coatings in actual boiler of thermal power plant

Fatigue Limit of Custom 465 with Surface Strengthening Treatment

Heating Conditions Influence on Solidification of Inconel 625–WC System for Additive Manufacturing

Contact Info

Product

Resources

About