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%.

scholarly journals Thermal Analysis of the Formation of Chunky Graphite during Solidification of Heavy-section Spheroidal Graphite Iron Parts

2009 ◽  
Vol 49 (2) ◽  
pp. 220-228 ◽  
Author(s):  
Jon Sertucha ◽  
Ramón Suárez ◽  
Iker Asenjo ◽  
Peio Larrañaga ◽  
Jacques Lacaze ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Spheroidal Graphite ◽  
Spheroidal Graphite Iron ◽  
Heavy Section ◽  
Chunky Graphite

Thermal expansion of a Spheroidal Graphite Iron: A micromechanical approach

2018 ◽  
Vol 141 ◽  
pp. 26-36 ◽  
Author(s):  
F.J. Rodriguez ◽  
A.D. Boccardo ◽  
P.M. Dardati ◽  
D.J. Celentano ◽  
L.A. Godoy
Keyword(s):  
Thermal Expansion ◽  
Spheroidal Graphite ◽  
Spheroidal Graphite Iron ◽  
Micromechanical Approach

scholarly journals Dynamic Recrystallization of Spheroidal Graphite Iron during Hot Cutting Operations

2015 ◽  
Vol 651-653 ◽  
pp. 1235-1240
Author(s):  
Kevin Le Mercier ◽  
Michel Watremez ◽  
Laurence Fouilland-Paillé ◽  
Laurent Dubar
Keyword(s):  
Dynamic Recrystallization ◽  
Test Bench ◽  
Orthogonal Cutting ◽  
Element Model ◽  
Spheroidal Graphite ◽  
Recrystallization Process ◽  
Spheroidal Graphite Iron ◽  
Cutting Test ◽  
Cutting Operation ◽  
Plastic Flow Stress

The objective of the present paper is to analyse the dynamic recrystallization process occurring during the hot cutting of spheroidal graphite iron. In the first instance, hot cutting tests are performed with an orthogonal cutting test bench. The emergence of dynamic recrystallization is highlighted thanks to microstructural observations. Then, a finite element model of the hot cutting operation is introduced. The material behaviour is modelled with a specific constitutive model considering the influence of dynamic recrystallization on the plastic flow stress. Finally, the predictive response of this model is compared to the experimental observations.

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