Material removal rate & wheel wear of abrasives vs Rockwell hardness

[BigDumbRedneck]

I manage a test lab for an abrasives manufacturer and was wondering what effect that Rockwell hardness has on abrasive wheel removal rate and wheel wear. Recently the hardness of our 1018 CRS plates has changed from 77-82 to 90-98. The material removal rate has increased along with wheel wear. Should the ratio of removal rate to wheel wear remain constant regardless of steel hardness?

 

[metengr]

At first glance, your question seems odd in terms of evaluating the significance of the ratio between abrasive wheel wear rate and wheel removal. Wheel wear rate would be measured in volume/time or distance, where wheel removal would be expressed as either a change in mass quantity or change in dimension.

What is the significance of this ratio? I would think the wear rate of the wheel would be the value to track for evaluation purposes.

I know from experience that abrasive wheels are not alike, and will behave differently based on material and hardness with all other factors kept constant. I have seen technical articles published on the design and selection of abrasive wheels because of the various abrasives and binders used by numerous suppliers.

 

[NickE]

metengr- I think he is talking about work removal rate versus wheel wear rate.

 

[metengr]

NickE;
You are probably correct. I focused too much on that first sentence. Time for some beer.

 

[NickE]

Absolutely!

 

[BigDumbRedneck]

Yes, wheel wear is measured by wheel loss over time and material removal rate is measured over time. We use a grind ratio number to evaluate wheels that is the amount of material removed divided by the amount of wheel lost.