Abstract
1. During electrolysis-free liquid boriding in salt baths with graphite and metal crucibles there is aging of the molten salt. 2. Molten salt aging proceeds most rapidly in a bath with a carbon-steel crucible. 3. Melt aging has little effect on microhardness and structure of the boride layer, but it changes boriding intensity very markedly, which leads to a sharp reduction in salt bath productivity and requires adjustment of its operating schedule. 4. In using under production conditions salt baths with metal crucibles it is necessary to adjust the impregnation schedule in relation to the material from which the crucible is manufactured.
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