Effect of Heat Treatment on the Microstructure and Corrosion Resistance of Stainless/Carbon Steel Bimetal Plate

Li, Hao; Zhang, Liyuan; Zhang, Boyang; Zhang, Qingdong

doi:10.1155/2020/1280761

Cited by 12 publications

(6 citation statements)

References 32 publications

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“…The carbon content of 0Cr19Ni9 steel is 0.054 wt.%, and the C content is relatively high, which induces obvious segregation of components [18]. The area with large C cannot be completely dissolved in austenite.…”

Section: Discussionmentioning

confidence: 99%

Analysis of Failure Causes of 0Cr19Ni9 Blade Crack

Han

XIE

et al. 2022

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In this paper, fracture morphology observation, microstructure analysis, standard corrosion test, and other experimental methods are used to analyze the causes of corrosion and cracking of steam turbine blades (0Cr19Ni9) produced by a certain company. The results showed that cracks appeared during the operation of the blade. A large number of dimples were observed under the scanning electron microscope, almost all of which were shear dimples; at the same time, fatigue bands were also distributed in them. The internal cause of the cracks is the long-term service, which causes the carbon and the alloy to undergo a diffusion reaction to form carbon-rich areas and carbides. They are thermally corroded in the service environment, and the carbon-rich zone is reduced, which reduces the strength of the zone; carbides accumulate at the grain boundary, causing groove-shaped defects at the grain boundary to form a cutting effect. It is easy to form a source of fatigue cracks. The external cause is that the material is subjected to transverse stress for a long time during operation, which leads to the generation of cracks. This article analyzes the failure causes of the blade and proposes related solutions, which have important reference value for production practice.

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Section: Discussionmentioning

confidence: 99%

Analysis of Failure Causes of 0Cr19Ni9 Blade Crack

Han

XIE

et al. 2022

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“…26 Xiao-Hui Lu and colleagues investigated the effects of subzero celsius treatment of retained austenite in bearing steel and results showed that the activation energy of retained austenite decomposition slightly increased through subzero celsius treatment and tempering. 27 Effect of heat treatment on the bimetallic plates has been investigated by O ¨zdemir 28 and also by Hao Li and colleagues; 29 both investigations presented significant results in terms of hardness, toughness, and good interface. Some significant studies based on high-chromium cast iron/ steel and MC (Cr-Fe Carbon) carbides are mentioned below:…”

Section: Introductionmentioning

confidence: 99%

Shallow Cryogenic Treatment (SCT) Effects on the Mechanical Properties of High Cr Cast Iron: Low-Carbon Cast Steel Bimetallic Casting

Özdemir

2020

Inter Metalcast

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The shallow cryogenic (subzero) treatment (SCT) effect on the mechanical properties of the bimetallic casting used in the crushing industry has been investigated. Examination methods include sand casting, heat treatment and SCT, Charpy impact test, optical microscope, scanning electron microscope, microanalysis of the chemical composition (energy dispersive spectroscopy-EDS), x-ray diffraction, and hardness measurement. Two bimetallic castings (single casting containing two layers, one of low-carbon cast steel-LCCS-back up part and other high Cr cast iron-HCCIworking part) have been prepared by the sand casting method. They have been subjected to diffusion annealing at 1040 °C for 5 h. One of them was quenched in pressurized air till 100 °C and was tempered at 270 °C for 3 h and, and the other one has been subjected to SCT at -84 °C for 24 h and then tempered at 270 °C for 3 h. The impact toughness values before and after SCT are determined five Charpy specimens per point. Hardness values and metallography of samples have been analyzed and compared. A remarkable change was observed in hardness and impact energy/toughness before and after SCT.

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“…Metal-clad plates are mainly used in aerospace, marine equipment, the petrochemical industry, machinery manufacturing and other fields due to their excellent comprehensive mechanical properties. Among them, stainless/carbon steel-clad plates are the most widely used product [1][2][3][4][5]. Generally, a stainless/carbon steel-clad plate takes carbon steel as the matrix and stainless steel as the coating, which gives consideration to the beautiful appearance and corrosion resistance of the stainless steel and the advantages of the high strength of the carbon steel [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Bond Quality of Metal-Clad Plates Using Laser Ultrasonic Local Resonance

Ji,

Cao,

Zhang

2024

Coatings

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The effective detection of delamination defects, especially sub-millimeter delamination defects, in metal-clad plates is of great significance in improving product quality. In this work, the laser ultrasonic (LU) local resonance method is used to locate and characterize the sub-millimeter defects in stainless/carbon steel-clad plates. The influence of the delamination radius on the amplitude and resonant frequency of the laser ultrasound was investigated using 2D axisymmetric finite element (FE) simulations. The simulation results show that both the amplitude and the first resonance frequency (FRF) are effective features for detecting large-scale delamination defects, but the FRF is a better feature for detecting tiny delamination defects. A 304/Q235/304-clad plate specimen was made through a hot rolling bonding process, which contained a large number of self-forming delamination defects. The laser ultrasonic signals of different composite states collected in the experiment have good consistency with the simulated waveforms. The experimental results show that the laser ultrasonic local resonance method is a high-resolution imaging method, which can locate and characterize the sub-millimeter delamination defects in stainless/carbon steel-clad plates.

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Effect of Heat Treatment on the Microstructure and Corrosion Resistance of Stainless/Carbon Steel Bimetal Plate

Cited by 12 publications

References 32 publications

Analysis of Failure Causes of 0Cr19Ni9 Blade Crack

Analysis of Failure Causes of 0Cr19Ni9 Blade Crack

Shallow Cryogenic Treatment (SCT) Effects on the Mechanical Properties of High Cr Cast Iron: Low-Carbon Cast Steel Bimetallic Casting

Evaluation of the Bond Quality of Metal-Clad Plates Using Laser Ultrasonic Local Resonance

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