ColinRX7

Cast iron plates. High carbon content steel alloy, has silicon added to the melt before casting, to produce graphite in the cast (increased wear resistance, corrosion resistance).



No good to weld to either for those reasons!

Bstrickler

My dad said that a granite block would work best, because it's hard, and won't warp. The only problem is its expensive. Where would I be able to get some varsol at? Would I be able to get it at Checker or Ace?

Fd3BOOST

Varsol, parts cleaner, thinner. All would do the same job.





Thanks for the info Colin!

Fd3BOOST

I have found that I can get some used irons cheaper than getting relap and nitride coated.

Here is the guy that you can contact though if you are looking to get it done.

He was really helpful to talk to and was pretty confident about the services they provide. They have not done rotary parts yet they specialize in other standard engine parts like heads etc. but he believes they would not have any problems doing rotary engine irons. He also found for me a local shop that can do the nitride coat process. I was quote $1.70 per lb. for the coating and was told he would beat any price on the lapping. I told him I was quoted $65 per face and he said he could do better.



Rob Indars

Valley Design Corp

978.425.3030

robindars@valleydesign.com



This place that does the coating is a seperate company.



http://www.countyheattreat.com/

cembrent

Just to clear things up a bit. Iron nitriding is not a coating, it is a gas that is introduced into the chamber during heat treating due to the fact that the cast iron that the irons are made from does not contain any significant amount of carbon. That also explains my second point, the irons do not have enough carbon to be hardened without something being added, hence the nitriding. No offence Collinrx7 but they can be welded just fine with a tig and stainless filler rod. What your discribing would not be considered cast iron at all, it would be cast steel. All tool steels contain a certain amount of carbon and this is why they can be heat treated easily and effectively.



Brian S. Your dads right that the granite surface plate is extremely flat and would stay that way. We use them all the time for checking heights and what not. You don't want to use one as a stone however. You'll do just fine with a flat sharpening stone. All you want to do is knock the rust off.



Brent

Bstrickler

Thanks Brent, I was hoping someone would be able to tell me an easier/cheaper way to take the rust off than using a piece of granite.

cembrent

Glad to help.

cembrent

Just realized we took over fd3boost's thread. Sorry about that.