METHOD OF APPLICATION OF COATS OF SELF-FLUXING ALLOYS Russian patent published in 2003 - IPC

FIELD: mechanical engineering; application of coats by gas thermal methods. SUBSTANCE: proposed method includes preheating of parts to 400-500 C, fusion in air and subsequent heat treatment performed at two stages; first parts are kept at temperature which is below temperature of beginning of martensitic transformation by 50-150 C for 1-2 h, after which temperature is raised at rate of 8-12 deg./min till magnitude corresponding to maximum rate of process of austenitic disintegration and parts are kept at this temperature for 2-3 h; then, they are cooled to room temperature at rate of 1-2 deg./min. EFFECT: reduced cracking; increased hardness of coat. 1 tbl, 1 ex