scholarly journals Detection of chunky graphite in iron casting using ultrasonic scattering

2019 ◽  
Author(s):  
Miriam Weikert-Müller ◽  
Ines Veile
Keyword(s):  
Ultrasonic Scattering ◽  
Iron Casting ◽  
Chunky Graphite

Effect of Yttrium and Magnesium Segregation on Microstructure and Mechanical Properties of Heavy Section Ductile Iron Castings

2011 ◽  
Vol 295-297 ◽  
pp. 1010-1016 ◽  
Author(s):  
Wei Ping Chen ◽  
Zhe Liu ◽  
Yu Deng ◽  
Jie Luo ◽  
Yong Cheng Chen
Keyword(s):  
Mechanical Properties ◽  
Ductile Iron ◽  
Magnesium Content ◽  
Solidification Mode ◽  
Iron Casting ◽  
Iron Castings ◽  
Microstructure And Mechanical Properties ◽  
Chunky Graphite ◽  
Main Factor ◽  
Ductile Iron Casting

Ductile iron specimen with dimensions of Φ590mm×800mm were prepared by treating the melt with an yttrium-containing nodulizer. Cooling curves at four locations____the center location, the location 85mm distant from the center, the location 170mm distant from the center and the location 255mm distant from the center of the heavy ductile iron casting Φ590mm×800mm was obtained. The effect of yttrium and magnesium on microstructure and mechanical properties was investigated, and the factors on the distribution of chunky graphite in the specimen were discussed as well. The results show that the largest amount of chunky graphite and the lowest mechanical properties appear at the location 170mm distant from the center. Excessive yttrium and magnesium content at the location 170mm distant from the center is the main factor for the large amount of chunky graphite. The characteristics of the solidification mode____pasty solidification and the considerably long solidification of the casting are the basic reasons for the distribution of chunky graphite of the heavy ductile iron casting Φ590mm×800mm.

scholarly journals Experimental Evidence for Metallurgical Modification Associated to Chunky Graphite in Heavy-Section Ductile Iron Castings

2012 ◽  
Vol 6 (1) ◽  
pp. 35-42 ◽  
Author(s):  
J. Lacaze ◽  
I. Asenjo ◽  
S. Méndez ◽  
J. Sertucha ◽  
P. Larrañaga ◽  
...  
Keyword(s):  
Experimental Evidence ◽  
Ductile Iron ◽  
Iron Castings ◽  
Heavy Section ◽  
Chunky Graphite

Defects Reduction in Spheroidal Graphite Iron Casting Process of a Jackscrew Manufacturer

2021 ◽  
Vol 891 ◽  
pp. 174-182
Author(s):  
Supachart Muangyai ◽  
Parames Chutima
Keyword(s):  
Six Sigma ◽  
Process Capability ◽  
Casting Process ◽  
End Users ◽  
Spheroidal Graphite ◽  
Iron Casting ◽  
Spheroidal Graphite Iron ◽  
Six Sigma Approach

This research focused on defects reduction in spheroidal graphite iron casting process of a jackscrew manufacturer in which graphite nodularity was lower than a given specification (75%). This situation could lead to serious issues and accident to end-users. The Six Sigma approach of DMAIC was employed to identify and eliminate the problems. The result obtained after implementing the Six Sigma showed that the process capability was improved from-0.47 to 2.04, and the average per cent graphite nodularity was increased significantly from 61.49% to 86.43%.

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