Dear Pradip,
Thank you very much for this information it is indeed very interesting information. The reason why I’m looking for such info is that a client of me is facing problems with casted bushes from which they machine Piston Rings. Hardness of the material is sometimes to low and there are inclusions present in the casting which first show up during machining. This kind of problems are mentioned in these documents and could be helpful finding the underlying problem.
Met vriendelijke groeten / Best Regards
Herman Pieper
Pieper Quality Support & Inspection
Phone: +31 (0)521 380083
Fax: +31 (0)84 7539225
Cell: +31 (0)6 51691215
www.pieper-qsi.nl
Van: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] Namens pgoswami
Verzonden: woensdag 9 maart 2011 14:32
Aan: materials-welding@googlegroups.com
Onderwerp: [MW:10237] FW: 10221] Effect of phosphorus as an alloying element on microstructure and mechanical properties of pearlitic gray cast iron
Hi Herman,
The attached literatures would be of interest to you. The issue looks to be formation the formation low melting but hard eutectic called stedite. Phosphorus is good for fluidity and hard phosphides/stedites increases the wear resistance of grey iron castings. However it's always advisable to restrict phosphorus within the specified limits, otherwise excess phosphides would make CI very brittle.
This effect would be less pronounced in S.G iron, where the impurities are inoculated and rounded up through injection of magnesium.
Thanks.
Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist & Consultant
Ontario,Canada.
Email-pgoswami@sympatico.ca,
pgoswami@quickclic.net
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of hpi001
Sent: Tuesday, March 08, 2011 8:55 AM
To: Materials & Welding
Subject: [MW:10221] Effect of phosphorus as an alloying element on microstructure and mechanical properties of pearlitic gray cast iron
Does anyone within this group has experience and/or some documentation which shows the effects of adding phosphor to pearlitic Gray Cast Iron, and what the reason is for such addition?
Thank you in advance.
Best Regards,
Herman Pieper
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