AZ91D熔体中原位合成TiC颗粒及冲刷腐蚀性能

周立玉; 李秀兰; 王宣; 张旭东; 易军

doi:10.15980/j.tzzz.2020.04.016

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AZ91D熔体中原位合成TiC颗粒及冲刷腐蚀性能
Preparation and Scour Corrosion Properties of In-situ Synthesized TiC Particles in AZ91D Melt
2020年40卷第4期页码：415-419
纸质出版日期： 2020 ，
DOI： 10.15980/j.tzzz.2020.04.016

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[1]周立玉,李秀兰,王宣,张旭东,易军.AZ91D熔体中原位合成TiC颗粒及冲刷腐蚀性能[J].特种铸造及有色合金,2020,40(04):415-419.

Zhou Liyu, Li Xiulan, Wang Xuan, et al. Preparation and Scour Corrosion Properties of In-situ Synthesized TiC Particles in AZ91D Melt[J]. Special Casting & Nonferrous Alloys, 2020,40(4):415-419.
[1]周立玉,李秀兰,王宣,张旭东,易军.AZ91D熔体中原位合成TiC颗粒及冲刷腐蚀性能[J].特种铸造及有色合金,2020,40(04):415-419. DOI： 10.15980/j.tzzz.2020.04.016.

Zhou Liyu, Li Xiulan, Wang Xuan, et al. Preparation and Scour Corrosion Properties of In-situ Synthesized TiC Particles in AZ91D Melt[J]. Special Casting & Nonferrous Alloys, 2020,40(4):415-419. DOI： 10.15980/j.tzzz.2020.04.016.

摘要

利用原位合成反应法

在不同温度（740、760和780℃）下对AZ91D镁合金熔体保温40min

制备了TiC/AZ91D镁基复合材料。借助光学显微镜和X射线衍射仪

对TiC/AZ91D镁基复合材料的组织形貌和物相进行观察和分析

并对制备的复合材料在质量分数为3.5%的NaCl溶液+石英砂条件下进行冲刷腐蚀磨损试验。结果表明

在740℃保温40min制备的复合材料主要由α-Mg、β-Mg

和Al

Ti组成。保温温度分别为760℃和780℃时

AZ91D镁合金中均出现了原位合成的TiC颗粒

并且随温度升高

TiC的数量增加。此外

TiC/AZ91D镁基复合材料在3.5%的NaCl溶液+石英砂中的冲刷腐蚀磨损性能随保温温度的升高而增加。经780℃保温40min后的复合材料呈出最好的耐冲刷腐蚀磨损性能

相比于AZ91D镁合金提高了60.5%。

Abstract

TiC/AZ91D magnesium matrix composites were prepared at different temperatures（740℃

760℃ and 780℃）for 40 min by in-situ synthesis reaction method.The microstructure and phase of TiC/AZ91D magnesium matrix composites were observed and analyzed by means of optical microscope and X-ray diffractometer.The erosion corrosion wear test of the prepared composites was performed in 3.5% NaCl solution and quartz sand.The composites are mainly composed ofα-Mg

β-Mg

and Al

Ti at 740℃ for 40 min.In situ synthetic TiC particles appear in AZ91D magnesium with holding at 760 ℃ and 780 ℃

respectively.Furthermore

the number of TiC particles is increased with increasing in temperature.Meanwhile

the erosion corrosion wear properties of TiC/AZ91D magnesium matrix composites in 3.5% NaCl solution and quartz sand is improved with the increase of holding temperature.At 780℃

the composites present the desirable erosion corrosion wear behavior which is increased by 60.5%compared with that of AZ91D magnesium.