Microstructure and Properties of High Carbon Equivalent Gray Cast Iron Modified by Rare Earth

2011 ◽  
Vol 295-297 ◽  
pp. 962-968
Author(s):  
Fu Min Chu ◽  
Xin Hui Zu ◽  
Zhong Kui Zhao ◽  
Xiao Yun Jiang
Keyword(s):  
Rare Earth ◽  
Cast Iron ◽  
Rare Earth Metal ◽  
Gray Cast Iron ◽  
Earth Metal ◽  
Gray Cast ◽  
Carbon Equivalent ◽  
High Carbon ◽  
Microstructure And Properties ◽  
The Rare Earth

Microstructure and properties of the high carbon equivalent gray cast iron modified by the rare earth metal are investigated by optical microscopy, scanning electronic microscopy, Brinell hardness and tensile testing. The results show that the primary austenite dendritic is refined, and the morphology of graphite is transformed from A-type to D-type undercooling graphite with increment of the rare earth metal (REM), even with the vermicular graphite present. The lamellae are becoming thinner with increment of rare earth metal. There are double peaks between the addition of the rare earth metal and the tensile strength/hardness. The iron would have the best comprehensive property when 0.30% REM is added.

Effect of Rolling Process on Microstructure and Wear Properties of High Carbon Equivalent Gray Cast Iron

2021 ◽  
Vol 36 (6) ◽  
pp. 903-910
Author(s):  
Yihong Zhao ◽  
Qianyu Chen ◽  
Zhiwei Zheng ◽  
Pei Cao ◽  
Ziyu Gong ◽  
...  
Keyword(s):  
Cast Iron ◽  
Gray Cast Iron ◽  
Rolling Process ◽  
Gray Cast ◽  
Carbon Equivalent ◽  
High Carbon ◽  
Wear Properties

Effect of Carbon Content on Microstructure and Properties of Gray Cast Iron

2014 ◽  
Vol 971-973 ◽  
pp. 44-48
Author(s):  
Ya Li Sun
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Carbon Content ◽  
Liquid Iron ◽  
Gray Cast Iron ◽  
Gray Cast ◽  
Carbon Equivalent ◽  
Microstructure And Properties ◽  
Metallographic Observation ◽  
Equivalent Control

Though the study of carbon content on the microstructure and properties of gray cast iron, mechanical properties test as well as metallographic observation, we could see that the mobility of molten iron is the best when carbon equivalent control at around 4.3%; Liquid iron tend to precipitate A or B type graphite and enhance the casting organization and property when carbon content was increased properly.

scholarly journals Bathroom brake circuits with vermicular graphite

2018 ◽  
pp. 40-49
Author(s):  
L Ivanova ◽  
E Kolotilo
Keyword(s):  
Rare Earth ◽  
Cast Iron ◽  
Cooling Rate ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Physical And Mechanical Properties ◽  
Cooling Rates ◽  
Highly Effective ◽  
Graphite Inclusions ◽  
The Rare Earth

The processes of structuring in cast iron of different chemical composition in the range of cooling rates of 0.5 ... 5.5 deg / s, which take place in the roll casting mould, are investigated. Scientifically based theoretical and experimental results were obtained, the set of which allowed to develop highly effective technologies of casting of rolling rolls from cast iron with vermicular graphite with increased operational characteristics. Optimum content of rare earth metal (REM) in roller cast iron with vermicular graphite at different cooling rates was experimentally established. In the low sulfur (up to 0,03%) cast iron, the rare earth metal residual (REMres) content is -0,065 ... 0,176 (for a cooling rate of 0,5 deg / s) and 0,01 ... 0,156% (for a cooling rate of 5,5 deg / s) . In the cast iron with high sulfur content (up to 0.10%), at the cooling rates studied, the intervals of concentrations of REMres have been experimentally established to provide the vermicular inclusions of graphite: at a cooling rate of 5.5 deg / c - 0.081-0.129%, and at a speed of 0.5 deg / s - 0.161 ... 0.190%. When modifying melts with a complex modifier based on magnesium KMg9, the Mg content at cooling rates of 5.5 and 0.5 deg / s should be within 0.022 ... 0.03 and 0.019 ... 0.03%, respectively, when treated with the complex KMg9 and FS30RZM30 in the cast iron it is necessary to have 0,0071 ... 0,015% Mg and 0,023 ... 0,025% REMres. With such content of modifiers, the best combinations of microstructure and physical and mechanical properties of castings are obtained. The areas of formation of vermicular graphite inclusions in roll cast irons were determined when processed with a complex modifier based on rare-earth metals and ferrotitanium: at a cooling rate of 5.5 degrees / s and a titanium content of 0.40 ... 0.42%, the concentration range of the rare-earth bridge for stable production of graphite inclusions of vermicular form has expanded and was 0.061 ... 0.169%, and at a cooling rate of 0.5 deg / s –0.129 ... 0.230%. The technological process of casting of bleached roller rolls has been improved due to the application of a highly effective complex modifier (ligature) of optimal composition for the modification of the base metal. The technology for the production of pig iron with vermicular graphite is developed and mastered at casting of rollers with the use of mixtures for modification consisting of two ligatures in the ratio of 1: 3.

ChemInform Abstract: Eu2(CN2)3and KEu[Si(CN2)4]: Missing Members of the Rare Earth Metal Carbodiimide and Tetracyanamidosilicate Series.

ChemInform ◽  
2016 ◽  
Vol 47 (45) ◽  
Author(s):  
Danuta Dutczak ◽  
Markus Stroebele ◽  
David Enseling ◽  
Thomas Juestel ◽  
H.-Juergen Meyer
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
The Rare Earth
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