Grey cast iron valve fracture
Grey cast iron valve fracture
(OP)
I need to get information regarding fracture appearance of overstressed grey cast iron. There are some intergranular fracture visible on the inside of the cast and almost looks like cup cone fracture on the outside. I do also need some inhibuted acid that will clean the fracture surface of this cast iron?
Please any suggstions would be appreciated.
Thank you
Please any suggstions would be appreciated.
Thank you





RE: Grey cast iron valve fracture
RE: Grey cast iron valve fracture
Fractures by most mechanisms occur along the graphite flakes in a "brittle" manner. This normally means that there is no ductility evident.
To clean fracture faces try 50% phosphoric acid swabbed on the surface and washed after sufficient time with water. The usual safety precautions for using concentrated acids must be followed.
RE: Grey cast iron valve fracture
a 10% solution of hydrochloric acid inhibited with one of the Rodine inhibitors (I use 426 for steels) works quite well.