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 Wear Resistance Mechanism of ZTAP/HCCI Composites with a Honeycomb Structure

Metals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 588 ◽  
Author(s):  
Mojin Zhou ◽  
Yudong Sui ◽  
Xiaoyu Chong ◽  
YeHua Jiang
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Abrasive Wear ◽  
Layer Structure ◽  
Resistance Mechanism ◽  
Honeycomb Structure ◽  
Protection Effect ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Chromium Cast Iron

The abrasive wear resistance of zirconia toughened alumina (ZTA) ceramic particle reinforced high chromium cast iron (HCCI) composites has been systematically investigated using a moving wedge type of apparatus. The results of three-body abrasive wear show that the wear resistance of the composites with honeycomb is three times higher than that of the high chromium cast iron. The wear resistance of the composites with a honeycomb structure is close to that of the layer structure and is higher than that of the HCCI because the honeycomb wall in the cell honeycomb structure is prominent and because the honeycomb core is depressed. The wear mechanisms of the composites are mainly microcutting and fatigue fractures. The honeycomb structure forms a “macrocosmic shadow protection effect” and a “microcosmic shadow protection effect” to protect each composite and to improve the wear resistance of the composites.

Toughening Study on High Chromium Cast Iron Liner Plates of HZS Series Commercial Concrete Mixing Plant

2011 ◽  
Vol 179-180 ◽  
pp. 1338-1341
Author(s):  
Jiang Liu ◽  
Jun Fu
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Impact Toughness ◽  
Normal Operation ◽  
High Wear Resistance ◽  
Liner Material ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
The Impact ◽  
Chromium Cast Iron

Because of high wear resistance and low cost, high chromium cast iron liner plate is the most commonly used liner for HZS series concrete mixing station at present. However, in normal operation, the high-chromium cast iron liner produced by conventional casting process is easy to crack at its corners. We found that the cracking reasons of this type of liner plate are mainly the lower cast impact toughness, slightly higher hardness, and there has not gotten a good matching between the hard particles and the matrix organizations. Thus we used the secondary heat treatment to slightly reduce the hardness and increase the impact toughness of cast iron liner plate, which can improve the wear resistance and impact resistance of the liner material to extend the service life of these cast iron liners.

scholarly journals Microstructure and Wear Resistance of WC and High Chromium Cast Iron Hardfacing Layers

Coatings ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 852
Author(s):  
Runnan Jia ◽  
Shenglin Liu ◽  
Zhichao Luo ◽  
Jiapei Ning ◽  
Haiyan Wang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
High Temperature ◽  
Abrasive Wear ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
High Chromium ◽  
Wear Process ◽  
High Chromium Cast Iron ◽  
Chromium Cast Iron

The WC and high chromium cast iron (HCCI) welded layers were prepared on Q235 low carbon steel by hardfacing technique in order to improve high-temperature performance. The microstructure and mechanical properties of the welded layer were investigated. It was found that Fe3W3C is the major strengthening phase of the WC welded layer. Furthermore, a high-temperature three-body abrasive wear experiment was designed and conducted on the welded layers. The results show that the wear resistance of the WC welded layer was much better than that of the HCCI welded layer at both room and high temperatures. During the high-temperature abrasive wear process, the Fe3W3C phase can effectively strengthen the matrix and hence, contribute to improved wear resistance.

The influence of retained austenite in high chromium cast iron on impact-abrasive wear

Wear ◽  
1990 ◽  
Vol 135 (2) ◽  
pp. 217-226 ◽  
Author(s):  
Tong Jian-Min ◽  
Zhou Yi-Zhong ◽  
Shen Tian-Yi ◽  
Deng Hai-Jin
Keyword(s):  
Cast Iron ◽  
Abrasive Wear ◽  
Retained Austenite ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Chromium Cast Iron

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.

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