Desolvation of carbides during tempering of ball mill balls and ball mill liners

The de-dissolution process of carbides in the tempering process of ball mill balls and ball mill liners Carbide precipitates from austenite during the tempering process of ball mill balls and ball mill liners, and is a process of desaturation of supersaturated solid solutions. The progress of this process is controlled by the diffusion rate of solute atoms. The chromium atoms and carbon atoms of the ball mill ball mill and the ball mill liner plate are diffused during the precipitation reaction, in which the diffusion rate of chromium atoms is low. If the ball mill ball and ball mill liner plated material is chromium carbide, the reaction is precipitated. The activation energy should be the sum of the activation energy of chromium atom diffusion and the chemical binding energy of carbon and chromium atoms. In order to study the precipitation process and type of precipitates in ball tempering and ball mill linings, the activation energy of the precipitation reaction was calculated by measuring the tempering time to reach high hardness, and the precipitated carbide type of ball mill and ball mill liner was determined.
Undercooled austenite and retained austenite can also produce polymer structures during tempering of ball mill balls and ball mill liners. However, a considerable number of secondary carbides are present in the matrix after the austenitizing treatment, and the carbon and chromium concentrations in the austenitic ball mill balls and ball mill liners are relatively low. More energy needs to be added to allow the solute atoms to diffuse and allow a longer tempering time to reach peak hardness. This may be related to the uneven distribution of solute X-lines in austenitic ball mill balls and ball mill liners. In the lower carbon and chromium content, the precipitation of carbides requires a longer tempering time. This part of the austenitic ball mill balls and the ball mill liner may be transformed into martensite during cooling, or deformation induced Markov in the plastic deformation process of the ball mill fittings material (such as deformation produced by the hardness tester head). body.