Method for accelerating precipitation speed of copper-rich phase of copper-containing steel through electric pulse

• Main Authors: LI JUAN, ZHAO GUANGHUI, LI YUGUI, LI HUAYING, GUO SHUXI, SONG YAOHUI
• Format: Patent
• Language: Chinese; English
• Published: 30.12.2022
• 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 belongs to the technical field of metal materials, and particularly relates to a method for accelerating the precipitation speed of a copper-rich phase of copper-containing steel through electric pulses. The method mainly comprises the following steps of electric pulse auxiliary solution treatment, quenching treatment and electric pulse auxiliary aging treatment. By applying pulse current to the copper-containing steel, precipitation evolution and accelerated growth of a copper-rich phase are promoted. The Joule heating effect of the pulse current can generate a coupling field of electricity, heat and strain within a very short time, the recrystallization degree is increased, the grain size of a matrix is refined, the pulse current further reduces the diffusion activation energy of the copper element, diffusion kinetics is enhanced, vacancy forming energy is reduced, the vacancy concentration is increased, Cu atom vacancy substitution is accelerated, and the copper-based composite material is ob