Cast steel wear parts as a ceramic composite 2

[arunmrao]

I am interested in learning more about mmc as applicable to cast wear parts used in mining industries. Much of this work is patented and not readily available. I shall be thankful,if some of the concerns that I have can be addressed

Preforming of ceramic inserts to be placed in the mold cavity.

Improving wetability between liquid steel and inserts( I assume they are honeycomb type cassettes,placed)

Anchoring of the inserts appropriately so they do not flow off or get displaced while molten metal is poured.

How to determine the size of opening for the liquid steel to flow and cover the complete mass.

Any restriction on thickness of the insert or ratio of ceramic section thickness to the section thickness of the part.

These are very direct questions related to manufacture of wear parts. However, if I can get some information or literature references, I shall be very thankful.

_____________________________________
"The richer we have become materially, the poorer we have become morally and spiritually." Martin Luther King Jr

 

[unclesyd]

I ran across the paper in the first link several times and just recovered it. The next three links are to organizations you probably are familiar with, but there is a lot of information there.
A cursory search on three different search engines didn't enlightened me about casting steel inserted ceramic inserts. I also took at the armor approach and it seems as all the effective is leaving rolled and cast armor plate and going with composites, like ceramic foam infiltrated with metal or another ceramic, or Al. foam infiltrated with ceramics.

I wonder if the Ferro-Tic materials would bond with cast steel Evidently you can bond metal infiltrated ceramic foam to steel at high temperatures.

http://www.odlewnictwo.polsl.pl/Archiwum/pdf/AFE-08.s3-pdf/34-s0

3-08.pdf

http://www.castmetals.com/

http://www.osti.gov/bridge/servlets/purl/814907-JKOmbk/native/

814907.pdf

http://www.afsinc.org/

http://www.ferro-tic.com/wearparts.html

 

[arunmrao]

Thanks unclesyd. Happy Easter Holidays. Some of the information may be in the proprietary region,hence my difficulty in getting inputs. However, I am now looking at broader areas to improve my understanding.

The benefits to the end user is quite substantial,but there is a mindset to be altered, I am busy doing that.

_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year

 

[unclesyd]

I have run across several papers where the integral ceramic tiles were used in armor plate. They were just statements nothing about the casting process. It seems that this type of armor is being replaced with a laminated ceramic/steel plate. Reading some of the DARPA documents again it appears that they are looking for an armor that will become part of the structure not just the hang on approach used today.

I went back in my notes from many years ago when the company I worked for made a gray iron body where they cast in some white iron bar for wear resistance. I haven't found anything yet but will keep looking since I worked on the project I should have my notes or a synopsis of the process. All I can remember is that they used a very dry sand. This sand was used with a sand slinger and still hand rammed after every hundred or so pounds of sand were added.

 

[arunmrao]

unclesyd,appreciate your efforts in helping me. I have a request,the first link that you have provided is giving an error. Do you have reprint copy of the same please?

_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year

 

[unclesyd]

That link is truncated by ET. I've found out if you can't copy the link in ET you can move it to a program like notepad and paste the link in the address bar.

Here is another link to the origin of this pdf. It's a little hard to navigate but they appear to have a lot good information.
I'll try to get a better link to this site, Archives of Foundry Engineering

http://www.odlewnictwo.polsl.pl/Archiwum/index.html

 

[unclesyd]

We will try again. There is a lot of good information available on this site.

Article J. They are several others on this link. It seems that the proper term for ceramics in steel is calling it a composite.

http://www.odlewnictwo.polsl.pl/Archiwum/search.php3?ID=AFE-08.s3&pole=3

 

[unclesyd]

This link should work. It is an index to papers in section 08.s3. If you get to the homepage click on "Archives of Foundry Engineering" which will give you a link to the above and the numerous other sections. As stated before this site is a little hard to navigate, but has a wealth of information.

http://www.odlewnictwo.polsl.pl/Archiwum/search.php3?ID=AFE-08.s3&pole=3

On problem I originally had was that I looked at sites found using ceramic composites instead of metal composites.

 

[unclesyd]

Here are three links that give hints to the process for MMC materials. You might get some references to new and bigger things.

http://mme.iitm.ac.in/isrs/isrs04/cd/content/Papers/COM/PO-COM-

8.pdf

http://www.archivesmse.org/vol28_7/28713.pdf

http://bilder.buecher.de/zusatz/14/14614/14614458_lese_1.pdf

 

[arunmrao]

Like in Oliver Twist by Charles Dickens,Oliver asks"Please Sir, I want some more".

So unclesyd, I want some more references,I have exhausted all that you have given.

_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year

 

[berkrefik]

I am also interested in this topic and working on this for some time. I compacted the ceramic particles with sodium silicate in the form of a honeycomb then sintered it. The problem is anchoring the ceramic inserts on the sand mould. It breaks and floats during casting. Did you get any improvements on this topic arunmrao?