摘要
采用自蔓延高温合成技术(SHS)结合真空消失模铸造工艺,在低合金钢表面上原位合成了TiC颗粒增强硬质涂层。通过光学显微镜、扫描电镜及能谱分析、X射线衍射以及显微硬度测试,研究了不同添加量氧化铈对TiCp/钢基硬质涂层组织及性能的影响。结果表明:通过添加适当的CeO2可以改善涂层质量,减少残渣、气孔等缺陷,提高涂层与基体的结合强度,原位合成的TiC呈圆形或椭圆形细小颗粒弥散分布在基体相中,显著提高了涂层的显微硬度。
TiC particles reinforced hard coatings were in situ synthesized on the surface of low alloy steel by self-propagating high-temperature synthesis（SHS） and the vacuum evaporative pattern casting（V-EPC） process. The effects of addition of CeO2 on microstructure and properties were studied by optical microscopy（OM）,scanning electron microscopy（SEM） energy spectrum analysis,X-ray diffraction and micro-hardness testing. The results showed that proper addition of CeO2 can improve the performance of the coatings,reduce the defects such as residue and blowhole,improve the bonding strength between coating and matrix and increase the micro-hardness of coatings significantly because the in-situ synthesized circle or ellipse TiC particles dispersively distributed into the matrix phase.
出处
《稀土》
EI
CAS
CSCD
北大核心
2014年第6期33-38,共6页
Chinese Rare Earths
基金
广东战略性新兴产业核心技术攻关项目(2011A091102002)
