CAJ | 학술논문

为提高钛合金TC4的抗高温氧化性能，采用加弧辉光离子渗金属技术在TC4基体表面渗铝制备富铝合金化层，并对合金化试样的微观组织结构、室温性能及高温氧化行为进行表征。结果表明，所得合金化层主要由TiAl3相构成，厚度均匀，与基体之间呈良好的冶金结合，显微硬度约为476 HV，平均摩擦因数为0.35，综合性能优于TC4基体。合金化层在800°C下氧化100 h后的主要产物为Al2O3，单位面积增重为TC4基体的1/30，抗高温氧化能力明显提高。
위제고태합금TC4적항고온양화성능，채용가호휘광리자삼금속기술재TC4기체표면삼려제비부려합금화층，병대합금화시양적미관조직결구、실온성능급고온양화행위진행표정。결과표명，소득합금화층주요유TiAl3상구성，후도균균，여기체지간정량호적야금결합，현미경도약위476 HV，평균마찰인수위0.35，종합성능우우TC4기체。합금화층재800°C하양화100 h후적주요산물위Al2O3，단위면적증중위TC4기체적1/30，항고온양화능력명현제고。
To improve the oxidation resistance of TC4 titanium alloy at high temperature, a Ti–Al alloyed coating was prepared on its surface by arc-added glow discharge technology. The microstructure, room temperature properties, and oxidation behavior at high temperature of the aluminized TC4 titanium alloy were characterized. It is shown that the alloyed coating is mainly composed of TiAl3 phase and has better overall performance such as a uniform thickness, a strong metallurgical bonding to substrate, a microhardness of 476 HV, and an average friction coefficient of 0.35. The major product of the alloyed coating after oxidizing at 800 °C for 100 h is Al2O3 and the weight gain per unit area is 1/30 that of the TC4 substrate, indicating that the oxidation resistance of TC4 substrate at high temperature is improved significantly.