CVD Al2O3涂层织构取向对显微组织结构和性能的影响
Influence of Texture Orientation of CVD Al2O3 Coating on Microstructure and Properties
瞿峻 1陈响明 1王社权 1温光华 1刘萍 1罗学全 1李思敏1
作者信息
- 1. 株洲钻石切削刀具股份有限公司,湖南 株洲 412000;硬质合金国家重点实验室,湖南 株洲 412000
- 折叠
摘要
化学气相沉积(CVD)Al2O3涂层具备高硬度,良好韧性,优异的耐磨、耐热、抗氧化、化学稳定等性能,是一种综合性能优良的切削刀具涂层材料.本文采用CVD制备了具有(104)、(0012)及(012)织构取向α-Al2O3的MT-TiCN/Al2O3/TiN涂层.采用XRD、SEM等研究了涂层显微组织结构、织构取向及涂层性能.实验结果表明,高(0012)织构取向α-Al2O3涂层柱状晶晶粒更完整;α-Al2O3涂层织构取向会影响表层TiN形貌及织构取向,高(0012)织构取向α-Al2O3表层TiN为高(111)织构取向,(104)织构取向α-Al2O3表层TiN为弱(111)+(331)混合织构取向,(012)织构取向α-Al2O3表层TiN为弱(220)+(420)混合织构取向.车削42CrMo实验结果表明,高(0012)织构取向α-Al2O3涂层耐磨性能优于(104)和(012)织构取向,主要表现在高(0012)织构取向α-Al2O3涂层前刀面和后刀面抗磨损能力均更优.
Abstract
The chemical vapor deposition(CVD)Al2O3 coating possesses high hardness,good toughness,as well as excellent wear resistance,heat resistance,oxidation resistance,and chemical stability.It is a cutting tool coating material with excellent comprehensive properties.In this paper,the MT-TiCN/Al2O3/TiN coatings with(104),(0012),and(012)texture orientations of α-Al2O3 were prepared by CVD.The microstructures,texture orientations,and coating properties were studied by using X-ray diffraction(XRD)and scanning electron microscope(SEM).The experimental results show that the columnar grains of the α-Al2O3 coating with high(0012)texture orientation are more complete.The texture orientation of the α-Al2O3 coating will affect the morphology and texture orientation of the surface TiN.The surface TiN of the α-Al2O3 coating with a high(0012)texture orientation exhibits a high(111)texture orientation.The surface TiN of the α-Al2O3 coating with a(104)texture orientation shows a weak(111)+(331)mixed texture orientation.The surface TiN of the α-Al2O3 coating with a(012)texture orientation presents a weak(220)+(420)mixed texture orientation.The results of the cutting experiment on 42CrMo indicate that the wear resistance of the α-Al2O3 coating with a high(0012)texture orientation is superior to that of the coatings with(104)and(012)texture orientations,mainly manifested in that both the rake face and the flank face of the α-Al2O3 coating with a high(0012)texture orientation have better wear resistance.
关键词
CVD涂层/α-Al2O3/织构取向/显微组织/切削性能Key words
CVD coating/α-Al2O3/texture orientation/microstructure/cutting performance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据