Influence of Niobium Content on the Mechanical Properties and Abrasion Wear Resistance of Heat-Treated High-Chromium Cast Iron

2020 ◽  
Author(s):  
Mervat Mohamed Ibrahim ◽  
Shimaa El-Hadad ◽  
Mohamed Mourad
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Cast Iron ◽  
Niobium Content ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Abrasion Wear ◽  
Heat Treated ◽  
Chromium Cast Iron

scholarly journals Sintering Preparation of 15 wt% Cr Cast Iron as well as Its Mechanical Properties and Impact Abrasive Wear

2020 ◽  
Author(s):  
Liyang Xiao ◽  
Pingan Xiao ◽  
Liviu Brândușan ◽  
Jinghong Gu ◽  
Zhongtao Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Cast Iron ◽  
Impact Toughness ◽  
Abrasive Wear ◽  
Bending Strength ◽  
Sintering Temperature ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Chromium Cast Iron

15 wt% Cr sintered High Chromium Cast Iron (HCCI) with full density was successfully prepared by Super-solidus Liquid Phase Sintering (SPLS) technique, with water atomized 15 wt% Cr high chromium cast iron powder as initial materials. Its densification behavior and microstructure evolution in SPLS process and mechanical properties were investigated systematically. Additionally, the impact abrasive wear resistance under different impact energies were also analyzed and compared with another sintered HCCI with 20 wt% Cr. The results indicated that sintering temperature has a strong influence on the sintered alloy’s density, hardness, impact toughness and bending strength. The M7C3 type (M is Cr and Fe) carbides were obviously coarsened as temperature increased and their rod-shaped branches were fully developed at the same time, thereby resulting in carbide network formation in the matrix. The reasonable sintering temperature range was 1195–1205 °C, and the optimum mechanical properties had the hardness of 63.9 HRC, bending strength of 2112.65 MPa and impact toughness of 7.92 J/cm2. What is more important impact abrasive wear test results indicated 15 wt% Cr sintered HCCI’s wear resistance could be comparable to 20 wt% Cr sintered HCCI under impact energy 1~3 J/cm2, and it is more cost effective.

scholarly journals Microstructural and Erosive Wear Characteristics of a High Chromium Cast Iron

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 490
Author(s):  
Annalisa Fortini ◽  
Alessio Suman ◽  
Alessandro Vulpio ◽  
Mattia Merlin ◽  
Michele Pinelli
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Erosion Resistance ◽  
Erosive Wear ◽  
High Chromium ◽  
Wear Characteristics ◽  
High Chromium Cast Iron ◽  
Heat Treated ◽  
The Impact ◽  
Chromium Cast Iron

Surface material loss due to erosive wear is responsible for the increased cost of maintenance and downtime in industries. Hence, hardfacing is one of the most valuable and effective techniques employed to improve the wear resistance of heavy-duty components. The present paper investigates the microstructural and erosive wear characteristics of a hypereutectic high-chromium cast iron, considering the erosion resistance, resulting from the impact of micro-sized particles, of both as-received and heat-treated conditions. Micro-sized particles involve the erosion-resistant characteristics of carbide and matrix, contemporary. Due to this, the enhancement of the matrix strength could improve the mechanical support to withstand cracking deformation and spalling. Accordingly, the effect of a destabilization heat treatment on the microstructure was firstly investigated by hardness tests, X-ray diffraction analyses, optical and scanning electron microscopy. Specifically designed erosive tests were carried out using a raw meal powder at an impingement angle of 90°. The resulting superior wear resistance of the heat-treated samples was relayed on the improved matrix microstructure: consistent with the observed eroded surfaces, the reduced matrix/carbides hardness difference of the heat-treated material is pivotal in enhancing the erosion resistance of the hardfacing. The present results contribute to a better understanding of the microstructure–property relationships concerning the erosive wear resistance.

Wear Resistance of Nano TiN Strengthen High Chromium Cast Iron

2012 ◽  
Vol 217-219 ◽  
pp. 2410-2413 ◽  
Author(s):  
Xing Hai Shao ◽  
Jing Pei Xie ◽  
Wen Yan Wang ◽  
Yan Li ◽  
Pin Gan Zhou ◽  
...  
Keyword(s):  
Grain Size ◽  
Wear Resistance ◽  
Cast Iron ◽  
Alloy Layer ◽  
Chromium Alloy ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Carbon Ferrochrome ◽  
Micro Analysis ◽  
Chromium Cast Iron

The effects and the mechanisms of namo TiN on the high chromium cast iron are studied, the material has been prepared through infiltration casting and addition of high carbon ferrochrome powder and nano TiN powder. The alloy is formed on the surfaced of guide plate, and the wear resistance of alloy have been studied by means of SEM, XRD micro-analysis and wear-resistant performance. The grain size and the type of carbide in the organization are affected by nano TiN, and the wear resistance of carbon chromium alloy layer is affected by the type of carbide; when the addition of nano TiN is 1% (wt), the grain size is apparently refined, overeutectic primary M7C3 in the hypereutectic is precipitated uniformly in considerable amounts, therefore the wear resistance of alloy can be improved effectively.

Microstructure and Corrosive Wear Property of Super High Chromium Cast Iron (SHCCI)

2011 ◽  
Vol 228-229 ◽  
pp. 905-908
Author(s):  
Liu Jie Xu ◽  
Shi Zhong Wei ◽  
Ji Wen Li ◽  
Guo Shang Zhang ◽  
Xiang Dong Ma
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Carbon Content ◽  
Corrosive Wear ◽  
Wear Property ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Relative Wear ◽  
Relative Wear Resistance ◽  
Chromium Cast Iron

To increase the wear resistance of components in slurry pump suffering from serious corrosive abrasion, new super high chromium cast iron (SHCCI) which contains 37wt.% chromium approximately and different carbon content were developed based on the high chromium cast iron with 26wt.% Cr (Cr26). The microstructure of SHCCI was investigated by SEM and XRD. The hardness and impact toughness of SHCCI was tested, and the corrosive wear property of SHCCI was also researched using MCF-30 type erosion abrasion tester under H3PO4 medium condition. The results show that the microstructure of SHCCI is composed of carbide of M7C3+M23C6, martensite and retained austenite. With the increase of carbon content, the hardness of SHCCI first increases and then decreases, the toughness increases, and the corrosive wear property decreases. The relative wear resistance of SHCCI is obviously superior to that of Cr26 cast iron, and the maximal relative wear resistance of SHCCI is three times higher than that of Cr26 cast iron.

Influence of retained austenite on the wear resistance of high chromium cast iron under various impact loads

Wear ◽  
1993 ◽  
Vol 162-164 ◽  
pp. 83-88 ◽  
Author(s):  
Xi Jun-Tong ◽  
Zhou Qing-De ◽  
Liu Shi-Hui ◽  
Song Guang-Shun
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Retained Austenite ◽  
Impact Loads ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Chromium Cast Iron
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