Central South University

Hongying Li

Jiaojiao Liu

Jie Bin

Zhaohe Gao

A method and its application for regulating heat treatment derived from the in-situ collection of information. In-situ collecting information and/or data during heat treatment on a test piece, comparing the information or data with relevant information or data in a heat treatment information database, detecting or characterizing a heat treatment extent or state of the test piece, thereby optimizing a heat treatment process of the material and/or regulating the heat treatment of the test piece. The heat treatment includes homogenization, solid solution treatment, aging, recovery and recrystallization annealing. The in-situ collection is to collect information or data of the test piece in an actual heat treatment environment in real time. The heat treatment information database includes relevant information and data of material, heat treatment process, and heat treatment procedure, which can be continuously improved and optimized through subsequent detection and self-learning.

Method and its application for regulating heat treatment derived from in-situ collection of information

A method for testing a phase transformation point of aluminium alloy, comprising cutting an aluminium alloy material to obtain at least three samples to be tested; performing heat treatment on a first sample to be tested to obtain a first resistivity-temperature curve; respectively performing quenching treatment and annealing treatment on a second sample to be tested and a third sample to be tested to obtain the second sample to be tested at a quenched state and the third sample to be tested at a fully annealed state, and respectively heating the second sample to be tested at a quenched state and the third sample to be tested at a fully annealed state to obtain a second resistivity-temperature curve and a third resistivity-temperature curve; obtaining a relative resistivity-temperature curve; and determining a phase transformation starting temperature and a phase transformation termination temperature of the sample to be tested according to the relative resistivity-temperature curve. By means of this method, a phase transformation behavior and a phase transformation temperature under a non-linear cooling condition can be tested. The range of a cooling rate which can be tested in the method is wide, and a phase transformation behavior of a small volume fraction and precipitated phase information about a small size can be captured.

Method for testing phase transformation point of aluminum alloy

A lightweight, high-conductivity, heat-resistant, and iron-containing aluminum wire, and a preparation process thereof. The aluminum wire is mainly composed of aluminum, boron, zirconium, iron, lanthanum, and inevitable impurity elements, and the preparation process for the wire is as follows: melting industrial pure aluminum; then adding intermediate alloys of boron, zirconium, iron, and lanthanum to the melt; performing stirring, refining, furnace front component rapid analysis, component adjustment, standing, deslagging, and rapid cooling casting to obtain an aluminum alloy blank; and performing annealing, extrusion, and drawing on the cast blank to obtain an aluminum alloy monofilament. The wire obtained has density less than or equal to 2.714 g/cm3, electrical conductivity greater than or equal to 62% IACS, a short-term heat-resistance temperature as high as 230&#xb0; C., a long-term heat-resistance temperature as high as 210&#xb0; C., and tensile strength greater than or equal to 170 MPa.

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Hunan, China

Hongying Li