Effect of cooling rate on microstructure and mechanical properties of gray cast iron

✍ Scribed by M.M. Jabbari Behnam; P. Davami; N. Varahram

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 965 KB
• Volume: 528
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/j.msea.2010.09.087

✦ Synopsis

This paper presents the results obtained and the deductions made from a series of microstructural studies and mechanical tests involving gray cast iron which was sand cast using a variety of modules. The effect of cooling rate on the primary dendrite arm spacing (DAS), secondary dendrite arm spacing (SDAS), thickness of ferrite-cementite layer ( e ) and the hardness (HB) were evaluated. Results show that the both DAS and SDAS and also e are highly dependent on the cooling rate, and they decreases as the cooling rate increases. More attempts were also done to correlate the HB with DAS, SDAS and e . It was found that HB increases as DAS, SDAS and e decreases.