连铸连轧镁合金AZ41微观结构与摩擦磨损性能

doi:10.7527/S1000-6893.2013.0367

Abstract

Abstract:

In order to analyze the friction wear properties of casting magnesium alloy AZ41 sheet, a twin-roll casting method is used for preparing a magnesium alloy AZ41 sheet, and the microstructure of the AZ41 sheet under the condition of twin-roll casting and heat-treatment are observed respectively. The effects of sliding speeds and loads on its friction wear properties are studied by a dry sliding friction test, and the worn surface morphologies are observed by an SEM in order to reveal its wear mechanism. Finally, the stress distribution during the friction wear processes is simulated by finite element analysis method. The results show that there is a large quantity of compression twin crystals in (1012) of the prepared materials and these crystals turn into equiaxed grains after heat-treatment; friction coefficient of the material gradually increases with the increase of the speed, and within a certain range of the load, the friction coefficient is reduced with the increase of the load. Wear weight loss increases with increasing load and speed, and the wear mechanism of the material is abrasive wear in low loads, which is accompanied by oxidation wear, but with high loads the main mechanism is adhesive wear.

Key words: twin-roll casting, magnesium alloys, microstructure, friction wear, wear mechanism

CLC Number:

SONG Linghui, WANG Shouren, CHO Jae-hyung. Microstructure and Friction Wear Properties of Twin-roll Casting Magnesium Alloy AZ41[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014, 35(6): 1733-1739.

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Microstructure and Friction Wear Properties of Twin-roll Casting Magnesium Alloy AZ41

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