Machining method of metal casting

• Main Author: LONG YONGLIN
• Format: Patent
• Language: Chinese; English
• Published: 16.06.2020
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CORRECTING FLUIDS; DIFFUSION TREATMENT OF METALLIC MATERIAL; DYES; FILLING PASTES; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; INKS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NATURAL RESINS; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; USE OF MATERIALS THEREFOR; WOODSTAINS

The invention discloses a machining method of a metal casting. The machining method comprises the following steps of casting, chemically removing oil, ultrasonically cleaning, alkali-washing, rinsingwith clear water, acid-washing neutralizing, ultrasonically cleaning with acetone, drying, vacuumizing, pressurizing, washing with water, carrying out stress relief treatment, machining, and coating after finishing machining. According to the machining method of the metal casting, impurities, greasy dirt and internal bubbles on the surface of the casting are effectively removed through pretreatment and bubble removal treatment of the metal casting, the casting is placed in the heating chamber to be subjected to stress removal treatment after being cleaned multiple times, and through heating, cooling and reheating treatment, the stress inside the metal casting can be effectively removed, later machining is facilitated, the problem of breakage in the machining process is avoided, and the corrosion resistance and the