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Post by 92220 on Jul 30, 2017 10:39:25 GMT
As Roger says, there doesn't seem to be much left to be wrong. It's beginning to look as if the material may be the problem.
Bob.
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Post by simplyloco on Jul 30, 2017 10:50:19 GMT
It doesn't sound like there's much left to be wrong then. I'd be interested to see how a scrap of the material behaves if you did it the crude way, ie heating it bright red and stirring it round in the Kasenit, then repeat a few times and quench. The Kasenit flares and glows in the flame, so you can tell it's the right stuff. Agreed: sounds like the material. Being an Army fitter/machinist meant that I had to make do and mend quite a lot of the time, and case hardening was a common requirement. I was trained to put the object in a tin (usually a used baked bean tin!) full of carbon material, chuck it in a very hot coal or gas hearth until it glowed almost white hot, and then leave it to cool off - as long as possible as the carbon has to infuse. Remove object, heat to bright cherry red and quench in water or oil, depending on the fragility of the piece. Very effective in getting a tank back on the road! John |
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