scholarly journals The casting process and high temperature oxidation resistance of high chromium cast iron grate bar

2019 ◽  
Vol 39 (1) ◽  
pp. 29-36
Author(s):  
Chen Zhiru ◽  
Xu Lei ◽  
Zhao Linwei ◽  
Wang Youchao ◽  
Li Changyun ◽  
...  
Keyword(s):  
Cast Iron ◽  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Casting Process ◽  
Shrinkage Cavity ◽  
Temperature Oxidation ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Chromium Cast Iron

The solidification process of a high chromium cast iron grate bar used for sinter machine was simulated, and high temperature oxidation resistance was also investigated. The simulation result shows that sequence solidification can be achieved and no shrinkage cavity and porosity were observed. Based on the analysis of the microstructure, it could be known that the grate bar was well protected by the Fe3O4、Fe2O3 and Cr2O3 oxide films at temperatures lower than 800°C.

Study on the Casting Process of the Large-Scale High-Chromium Cast Iron Impeller

2010 ◽  
Vol 139-141 ◽  
pp. 622-625
Author(s):  
Feng Li Qiao ◽  
Yi Min Yin ◽  
Xiao Hui Zhi
Keyword(s):  
Cast Iron ◽  
Process Design ◽  
Large Scale ◽  
High Hardness ◽  
Casting Process ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Chromium Cast Iron ◽  
Cracking Tendency ◽  
Casting Production

The cracking tendency of large-scale high-chromium cast iron impeller was large, and its casting production was a problem in slurry pump industry. The casting process of the largest high-Chromium cast iron impeller in China was presented in this paper. Through casting process design and alloy composition design, the produced impellers met the quality demands, such as no crack, surface smoothness and high hardness. Huazhu CAE was used to simulate the casting process and the parameters used in the simulation were introduced. The STL document used in Huazhu CAE was converted from the 3D molding of the casting process using the Solidwork software. The simulation result showed that the casting process was feasible. They have been successfully used in the dredge, New Sea lion.

scholarly journals Process and High-Temperature Oxidation Resistance of Pack-Aluminized Layers on Cast Iron

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 648 ◽  
Author(s):  
Xing Wang ◽  
Yongzhe Fan ◽  
Xue Zhao ◽  
An Du ◽  
Ruina Ma ◽  
...  
Keyword(s):  
Cast Iron ◽  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Mass Gain ◽  
Spheroidal Graphite ◽  
Temperature Oxidation ◽  
Graphite Cast Iron ◽  
Pack Aluminizing ◽  
Aluminide Layer

Pack aluminizing of spheroidal graphite cast iron with different aluminizing temperature and time was studied. Results showed that the thickness of aluminized layer increased with the increasing temperature and time. The optimized process parameters are as follow: the aluminizing packed temperature is 830 °C and the time is 3 h. The aluminized layer consisted of the inner FeAl and the outer Fe2Al5. Some graphite nodules were observed in the aluminide layer after aluminizing. The mass gain of the aluminized cast iron was 0.405 mg/cm2, being 1/12 of the untreated substrate after oxidation. The high temperature oxidation resistance can be improved effectively by pack aluminizing, even though there were graphite nodules in the aluminide layer.

The Casting Process of the High Chromium Cast Iron Grinding Ball in Mill

2012 ◽  
Vol 538-541 ◽  
pp. 1197-1202
Author(s):  
Zhe Bo Zhou ◽  
Qing Hong Zhou ◽  
Hai Zhen Liang ◽  
Jin Long Zhang ◽  
Nan Nan Zhu
Keyword(s):  
Cast Iron ◽  
Casting Process ◽  
Work Conditions ◽  
Chemical Compositions ◽  
Mixture Ratio ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Die Cast ◽  
Shock Resistance ◽  
Chromium Cast Iron

Aimed at the work conditions and the failure of the grinding ball in ball grinding, High chromium cast iron with the characteristics of long service life, high abrasion resistance and good shock resistance must be chose in the ball grinding . The best mixture ratio of chemical compositions was pointed out, and the production technological process by using die cast is introduced.

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.

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