工程科学学报，第40卷，第6期：721-728,2018年6月 Chinese Journal of Engineering,Vol.40,No.6:721-728,June 2018 DOI:10.13374/j.issn2095-9389.2018.06.010:http://journals.ustb.edu.cn 钛合金挤压用含NaCl新型玻璃润滑剂的黏一温特性、 热腐蚀及热障性能 金峰，倪嘉，张志豪四，谢建新 北京科技大学新材料技术研究院，北京100083 ☒通信作者，E-mail:ntzzh2279@163.com 摘要以提高钛合金热挤压润滑效果为目的，研究了一种以磷酸盐玻璃、SiO,和NC为主要组成的新型玻璃润滑剂，通过 模拟挤压实验、扫描电子显微镜以及换热系数测量装置，重点分析了不同组成比润滑剂的黏度一温度曲线、高温下润滑剂对钛 合金的腐蚀作用、润滑条件下钛合金与模具钢之间的换热特征.结果表明，磷酸盐玻璃、Si0,和NCl的质量比为70：20：10的 润滑剂，在600-900℃之间的黏度变化幅度较小，为1.3×103-9.4×103Pas,有利于提高钛合金挤压润滑效果.950℃下润 滑剂与钛合金的接触时间不超过3in时，润滑剂对钛合金坯料表面的高温腐蚀作用很小，且具有消除坯料表面原有氧化层 的作用：但随高温接触时间的延长，钛合金表面的高温腐蚀程度逐渐增大.当TA15钛合金和H13模具钢的初始温度分别为 900和400℃、新型润滑剂最终厚度约0.1mm时，钛合金和模具钢之间的界面换热系数随实验时间的延长由185增加到1714 W·m2·s,而传统钛合金热挤压用硅酸盐玻璃润滑剂为286~2025W·m2·s,表明新型玻璃润滑剂具有较好的高温热障 性能。 关键词钛合金：挤压：玻璃润滑：黏度：换热 分类号TG146.23 Viscosity-temperature characteristics,hot corrosion,and thermal barrier properties of new glass lubricants containing NaCl for the extrusion of titanium alloys JIN Feng,NI Jia,ZHANG Zhi-hao,XIE Jian-xin Institute for Advanced Materials and Technology.University of Science and Technology Beijing,Beijing 100083.China Corresponding author,E-mail:ntzzh2279@163.com ABSTRACT To improve lubrication during the hot extrusion of titanium alloys,a new type of glass lubricant based on phosphate glass,SiO,and NaCl was prepared.The viscosity-temperature curve of the lubricant with different composition ratios was determined from an extrusion experiment.Corrosion by the lubricant of a titanium alloy under high temperature was analyzed via scanning electron microscope.The heat transfer characteristics between the titanium alloy and die steel was studied using heat transfer coefficient meas- urement equipment.The results show that the viscosity of the glass lubricant,with a mass ratio of phosphate,SiO,and NaCl of 70:20 10,varies slightly between 600C and 900C,ranging from 1.3 x 10'to 9.4 x10Pa*s.This is beneficial to improvements in the ex- trusion and lubrication of titanium alloys.When the contact time between the new glass lubricant and the titanium alloy is not more than 3 min at 950 C,the new glass lubricant shows little corrosion on the surface of the titanium alloy,and serves the function of removing the original oxide layer on the alloy surface.High-temperature corrosion of the titanium alloy surface increases gradually with an in- crease in contact time.When the initial temperatures of the TAl5 titanium alloy and H13 die steel are 900 and 400 C respectively and the final thickness of the new glass lubricant is approximately 0.I mm,the heat transfer coefficient between the titanium alloy and die 收稿日期：2017-09-22 基金项目：国家重点研发计划资助项目(2017YFB0306200)工程科学学报，第 40 卷，第 6 期: 721--728，2018 年 6 月 Chinese Journal of Engineering，Vol． 40，No． 6: 721--728，June 2018 DOI: 10． 13374 /j． issn2095--9389． 2018． 06． 010; http: / /journals． ustb． edu． cn 钛合金挤压用含 NaCl 新型玻璃润滑剂的黏--温特性、 热腐蚀及热障性能 金 峰，倪 嘉，张志豪，谢建新 北京科技大学新材料技术研究院，北京 100083 通信作者，E-mail: ntzzh2279@ 163． com 摘 要 以提高钛合金热挤压润滑效果为目的，研究了一种以磷酸盐玻璃、SiO2和 NaCl 为主要组成的新型玻璃润滑剂，通过 模拟挤压实验、扫描电子显微镜以及换热系数测量装置，重点分析了不同组成比润滑剂的黏度--温度曲线、高温下润滑剂对钛 合金的腐蚀作用、润滑条件下钛合金与模具钢之间的换热特征． 结果表明，磷酸盐玻璃、SiO2和 NaCl 的质量比为 70∶ 20∶ 10 的 润滑剂，在 600 ～ 900 ℃之间的黏度变化幅度较小，为 1. 3 × 105 ～ 9. 4 × 105 Pa·s，有利于提高钛合金挤压润滑效果． 950 ℃ 下润 滑剂与钛合金的接触时间不超过 3 min 时，润滑剂对钛合金坯料表面的高温腐蚀作用很小，且具有消除坯料表面原有氧化层 的作用; 但随高温接触时间的延长，钛合金表面的高温腐蚀程度逐渐增大． 当 TA15 钛合金和 H13 模具钢的初始温度分别为 900 和 400 ℃、新型润滑剂最终厚度约 0. 1 mm 时，钛合金和模具钢之间的界面换热系数随实验时间的延长由 185 增加到 1714 W·m － 2·s － 1，而传统钛合金热挤压用硅酸盐玻璃润滑剂为 286 ～ 2025 W·m － 2·s － 1，表明新型玻璃润滑剂具有较好的高温热障 性能． 关键词 钛合金; 挤压; 玻璃润滑; 黏度; 换热 分类号 TG146. 2 + 3 收稿日期: 2017--09--22 基金项目: 国家重点研发计划资助项目( 2017YFB0306200) Viscosity-temperature characteristics，hot corrosion，and thermal barrier properties of new glass lubricants containing NaCl for the extrusion of titanium alloys JIN Feng，NI Jia，ZHANG Zhi-hao ，XIE Jian-xin Institute for Advanced Materials and Technology，University of Science and Technology Beijing，Beijing 100083，China  Corresponding author，E-mail: ntzzh2279@ 163． com ABSTＲACT To improve lubrication during the hot extrusion of titanium alloys，a new type of glass lubricant based on phosphate glass，SiO2，and NaCl was prepared． The viscosity-temperature curve of the lubricant with different composition ratios was determined from an extrusion experiment． Corrosion by the lubricant of a titanium alloy under high temperature was analyzed via scanning electron microscope． The heat transfer characteristics between the titanium alloy and die steel was studied using heat transfer coefficient meas￾urement equipment． The results show that the viscosity of the glass lubricant，with a mass ratio of phosphate，SiO2，and NaCl of 70∶ 20 ∶ 10，varies slightly between 600 ℃ and 900 ℃，ranging from 1. 3 × 105 to 9. 4 × 105 Pa·s． This is beneficial to improvements in the ex￾trusion and lubrication of titanium alloys． When the contact time between the new glass lubricant and the titanium alloy is not more than 3 min at 950 ℃，the new glass lubricant shows little corrosion on the surface of the titanium alloy，and serves the function of removing the original oxide layer on the alloy surface． High-temperature corrosion of the titanium alloy surface increases gradually with an in￾crease in contact time． When the initial temperatures of the TA15 titanium alloy and H13 die steel are 900 and 400 ℃ respectively and the final thickness of the new glass lubricant is approximately 0. 1 mm，the heat transfer coefficient between the titanium alloy and die