工业纯钛TA2交流电场增强粉末法铝碳氮共渗
Alternating current field enhanced pack aluminum-carbonitriding of commercial pure titanium TA2
韩爱玉 1谢飞2
作者信息
- 1. 常州大学材料科学与工程学院,江苏常州 213164
- 2. 常州大学材料科学与工程学院,江苏常州 213164;常州大学江苏省材料表面技术重点实验室,江苏常州 213164
- 折叠
摘要
对工业纯钛TA2在750℃进行交流电场增强粉末法铝碳氮共渗.采用金相显微观察、X射线衍射分析、显微硬度测试等分析试样渗层组织、相结构、渗层厚度以及显微硬度沿渗层深度方向的分布.结果表明,工业纯钛TA2经电流为2 A的交流电场增强渗扩所得共渗层由TiN、Ti2N以及少量AlTi3构成,随电场电流逐步由2 A增大至6 A,渗层开始出现Ti3AlN、C0.3N0.7Ti相,而TiN、Ti2N消失,AlTi3始终存在;TA2工业纯钛经同样渗剂、同样温度和同样时间常规渗扩后,渗层未检测到含铝相;交流电场对工业纯钛TA2粉末法铝碳氮共渗有显著促渗作用,促渗作用随电场电流的增大而增强;施加电流为6 A的电场,能够获得厚度约40 μm的渗层;交流电场还提高渗层硬度峰值及沿层深分布的整体硬度.
Abstract
Alternating current field(ACF)enhanced pack aluminum-carbonitriding was carried out at 750℃for commercial pure titanium TA2.The microstructure,phase structure,thickness and microhardness distribution along the case depth of the treated specimens were analyzed by means of optical microscopy,X-ray diffraction and microhardness test.The results show that the case obtained with the help of the ACF with a current of 2 A consists of TiN,Ti2N and a small amount of AlTi3.As the ACF current gradually increases from 2 A to 6 A,Ti3AlN and C0.3N0.7Ti are found in the surface layer,and the amount of TiN and Ti2N disappear,while AlTi3 always exists.No aluminum-containing phase is detected in the surface layer of TA2 treated by conventional pack aluminum-carbonitriding with the same agent,temperature and time used for the ACF enhanced treating.The ACF has a significant promoting effect on the pack aluminum-carbonitriding.The promoting effect increases with the increase of the ACF current.Applying an electric field with a current of 6 A can produces a case with a thickness about 40 μm.The ACF also increases the case's peak hardness and overall hardness along the case's depth.
关键词
工业纯钛TA2/铝碳氮共渗/交流电场Key words
commercial pure titanium TA2/pack aluminum-carbonitriding/alternating current field引用本文复制引用
出版年
2024
NETL
NSTL
万方数据