Composite heat treatment method based on vacuum and copper-clad nanocrystalline strip

• Main Authors: YANG LEQI, SHAO HUIFENG, ZHOU ROUGANG, CHEN HUIPENG, LI WENXIN
• Format: Patent
• Language: Chinese; English
• Published: 09.09.2022
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a composite heat treatment method based on vacuum and copper-clad nanocrystalline strips, which comprises the following steps of: (1) doping copper and nickel into Fe-Si-B amorphous alloy, and smelting; (2) casting molding is carried out, and a strip-shaped Fe-Cu-Nb-Si-B alloy is obtained; (3) the strip-shaped Fe-Cu-Nb-Si-B alloy is loaded into a copper coating mold; (4) the temperature of the vacuum crystallization furnace is increased to 300 DEG C to 330 DEG C, the copper-clad mold containing the strip-shaped Fe-Cu-Nb-Si-B alloy is put into the vacuum crystallization furnace, heat preservation is conducted for 2 h to 2.5 h, the temperature is increased to 510 DEG C to 560 DEG C at the temperature increasing speed of 1 DEG C/min to 2 DEG C/min, heat preservation is conducted, and the heat preservation time is 50 min to 70 min; and (5) cooling the vacuum crystallization furnace to 320-350 DEG C at a speed of 6-7 DEG C/min, discharging, and naturally cooling at room temperature to obtain