Abrasion-resistant taper-shank twist drill and preparation method thereof

• Main Authors: Cheng Hua, Cheng Shidi, Han Nianzhen
• Format: Patent
• Language: Chinese; English
• Published: 24.08.2016
• Subjects: ALLOYS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses an abrasion-resistant taper-shank twist drill and a preparation method thereof. The abrasion-resistant taper-shank twist drill comprises, by weight, 0.88%-1.36% of carbon, 3.8%-5.6% of chromium, 4.5%-6.2% of tungsten, 1.65%-3.55% of vanadium, 11.6%-13.6% of manganese, 0.37%-0.72% of titanium, 0.02%-0.08% of niobium, 2.6%-4.2% of molybdenum, 0.003%-0.008% of zirconium, 0.86%-1.37% of aluminum, 0.0015%-0.0048% of boron, 0.02%-0.028% of nitrogen and the balance iron. The hardness, the strength and the abrasion resistance of the surface of steel are further improved through nitriding treatment. Proportions of the elements are adjusted to make the elements achieve the synergistic effect, the strength, the hardness and the abrasion resistance of the drill are remarkably improved, and the hardness and the abrasion resistance of the drill are further improved through quenching, moderate-temperature tempering and nitriding, so that the service life of the drill is greatly prolonged. 本发明公开了种耐磨锥柄