Method suitable for directly testing and evaluating quenching effect of aluminum alloy material

Abstract

The invention discloses a method suitable for directly testing and evaluating the quenching effect of an aluminum alloy material. The method comprises the following steps of: (1) cutting a quenching sample, filling a thermocouple into a characteristic position, and performing heat insulating treatment on the side face of the sample; (2) performing solution heat treatment on the treated sample and monitoring the temperature; (3) performing quenching tests under different quenching conditions and monitoring the quenching cooling speeds of the sample at different positions; (4) testing residual stress on the characteristic position, determining the tensile properties, hardness and electric conductivities of positions of different depth distances way from the quenching surface, drawing a curve and performing microstructure observation and analysis; and (5) determining an appropriate quenching process for practical material production according to a test result obtained in the step (4). In the invention, a sample heat insulating treatment method is adopted, and the temperature is monitored in real time with a thermocouple filling method, so that the practical quenching state of a material can be simulated directly and accurately, the consistence between the test result and a test result of a large-specification workpiece under overall quenching is high, and a quenching process suitable for practical production can be optimized and determined.

Description

technical field

[0001] The invention relates to a method suitable for directly testing and evaluating the quenching effect of aluminum alloys, belonging to the field of heat treatment of metal materials. Background technique

[0002] Heat treatment can strengthen aluminum alloys, mainly including 7XXX series aluminum alloys, 2XXX series aluminum alloys and 6XXX series aluminum alloys, etc., which are widely used in aerospace, transportation and other fields. The high strength and hardness of the alloy are mainly obtained through solid solution, quenching and subsequent aging; quenching is a key process, quenching makes the high-temperature state of the alloy fix the supersaturated state to room temperature by rapid cooling, the purpose of which is to make the quenching A large number of vacancies and supersaturated solid solutions remain in the structure, providing thermodynamic and kinetic conditions for aging precipitation. Then there is a problem of hardenability in this...

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