We may need to do some gentle grinding on some ASTM A532 white iron castings. > 500 BHN. Their wear resistance comes from the formation of nasty chrome carbides.
The purpose of the grinding is to remove shallow heat checks (cracks!) caused by previous grinding, without creating more cracks, or worsening the ones there.
These materials are extremely prone to cracking with the slightest touch of a grinding wheel, so I'm guessing we need something that stays sharp and free cutting.
I'm trying to determine if there is a hardware store solution.
I'm also thinking that using something slower than the typical 10,000 rpm 4 inch angle grinder might reduce heating, at the expense of good cutting action.
The purpose of the grinding is to remove shallow heat checks (cracks!) caused by previous grinding, without creating more cracks, or worsening the ones there.
These materials are extremely prone to cracking with the slightest touch of a grinding wheel, so I'm guessing we need something that stays sharp and free cutting.
I'm trying to determine if there is a hardware store solution.
I'm also thinking that using something slower than the typical 10,000 rpm 4 inch angle grinder might reduce heating, at the expense of good cutting action.