The invention discloses a medical
osteotome for mandible
plastic surgery and a preparation method thereof. The medical
osteotome comprises the following material components: 0.20% to 0.55% of C, 12% to 20% of Cr, 0.2% to 0.8% of Si, 0.5% to 1.5% of Mn, 0.3% to 1.0% of Ni, 0.5% to 1.5% of Mo, 0.2% to 0.5% of N, Fe and a small amount of
impurity elements. The preparation method comprises the steps of heating a roughly machined
osteotome blank to 1000 DEG C to 1050 DEG C for austenitizing; then, carrying out
cryogenic treatment on the osteotome at the temperature of minus 60 DEG C to minus 130 DEG C; then, carrying out
tempering on the osteotome at the temperature of 150 DEG C to 200 DEG C two times, wherein
tempering is carried out for not less than 2 hours each time; then,
air cooling the osteotome to the
room temperature; and carrying out finish
machining treatment on the osteotome blank to obtain a final finished product. The osteotome is applicable to mandible
plastic surgery and has relatively high
hardness and
toughness, the edge of the osteotome is not liable to curl during the
surgery, the service life of the osteotome is greatly prolonged, and safety and reliability of the
surgery are guaranteed.