置氢改性钛合金扩散连接机理研究
|
摘要
利用置氢技术改善TC4钛合金的扩散连接性,优化扩散连接工艺参数。在Gleeble1500D热模拟机上,采用固态置氢技术进行了不同氢含量的置氢TC4钛合金的真空扩散连接试验;采用扫描电镜对界面孔洞弥合率和界面组织形貌进行了分析。结果表明:由于氢的扩散系数大,可显著提高置氢TC4钛合金的扩散系数,降低α+β→β相转变温度,稳定合金中β相,促进晶界扩散,提高晶界活性,使材料热加工变形得到改善;当置氢钛合金中氢的质量分数为0.25%、扩散连接温度为840℃、压力为15 MPa、保温时间为60 min时,界面结合良好,此时焊接区无扩散孔洞,钛合金基体组织仍为等轴α+β双相组织,且晶粒无明显长大。
The diffusion bonding of TC4 titanium alloy was improved by using hydrogenation technology, and the diffusion bonding process parameters were optimized. Vacuum diffusion bonding experiments of hydrogenated TC4 titanium alloy with different hydrogen content were carried out on the Gleeble1500 D thermal simulator using the solid-state hydrogenation technology. Scanning electron microscopy was used to analyze the interface void-filling rate and interface morphology. The results show that the diffusion coefficient of hydrogen can significantly increase the diffusion coefficient of the hydrogenated TC4 titanium alloy, lower the α+β→β transition temperature, stabilize the β phase in the alloy, and promote the diffusion of grain boundaries. The grain boundary activity was enhanced, thereby the material's hot working deformation was improved. When the hydrogen content of the hydrogenated titanium alloy was 0.25%, the diffusion bonding temperature was 840 ℃, the pressure was 15 MPa, and the holding time was 60 min, the interface was well bonded, where there was no diffusion holes in the weld zone, the titanium alloy matrix structure was still equiaxed α+β two-phase structure, and the crystal grains did not grow significantly.
The diffusion bonding of TC4 titanium alloy was improved by using hydrogenation technology, and the diffusion bonding process parameters were optimized. Vacuum diffusion bonding experiments of hydrogenated TC4 titanium alloy with different hydrogen content were carried out on the Gleeble1500 D thermal simulator using the solid-state hydrogenation technology. Scanning electron microscopy was used to analyze the interface void-filling rate and interface morphology. The results show that the diffusion coefficient of hydrogen can significantly increase the diffusion coefficient of the hydrogenated TC4 titanium alloy, lower the α+β→β transition temperature, stabilize the β phase in the alloy, and promote the diffusion of grain boundaries. The grain boundary activity was enhanced, thereby the material's hot working deformation was improved. When the hydrogen content of the hydrogenated titanium alloy was 0.25%, the diffusion bonding temperature was 840 ℃, the pressure was 15 MPa, and the holding time was 60 min, the interface was well bonded, where there was no diffusion holes in the weld zone, the titanium alloy matrix structure was still equiaxed α+β two-phase structure, and the crystal grains did not grow significantly.
引文
[1] 曾尚武, 江海涛, 赵爱民. TC4钛合金高温氧化行为 [J]. 稀有金属材料与工程, 2015, 44(11): 2812-2816. ZENG Shangwu, JIANG Haitao, ZHAO Aimin. TC4 titanium alloy high-temperature oxidation behavior [J]. Rare Metal Materials and Engineering, 2015, 44(11): 2812-2816.
[2] 刘婉颖, 朱毅科, 林元华, 等. 热处理对TC4钛合金显微组织和力学性能的影响 [J]. 材料导报, 2013, 27(18): 108-111. LIU Wanying, ZHU Yike, LIN Yuanhua, et al. Effect of heat treatment on microstructure and mechanical properties of TC4 titanium alloy [J]. Materials Review, 2013, 27(18): 108-111.
[3] ZHAO Z, CHEN J, GUO S, et al. Influence of α/β interface phase on the tensile properties of laser cladding deposited Ti-6Al-4V titanium alloy [J]. Journal of Materials Science & Technology, 2017, 33(7): 675-681.
[4] WANG Y L, HUI S X, LIU R, et al. Dynamic response and plastic deformation behavior of Ti-5Al-2.5Sn ELI and Ti-8Al-1Mo-1V alloys under high-strain rate [J]. Rare Metals, 2014, 33(2): 127-133.
[5] 董显娟, 鲁世强, 王克鲁, 等. β转变组织TA15钛合金塑性流动失稳行为 [J]. 稀有金属材料与工程, 2018, 47(5): 1485-1491. DONG Xianjuan, LU Shiqiang, WANG Kelu, et al. Plastic flow instability behavior of titanium alloy TA15 with beta-transformation structure [J]. Rare Metal Materials and Engineering, 2018, 47(5): 1485-1491.
[6] 袁宝国, 刘大海, 李春峰. 置氢钛合金的除氢研究 [J]. 稀有金属材料与工程, 2014, 43(9): 2104-2107. YUAN Baoguo, LIU Dahai, LI Chunfeng. Study on dehydrogenation of hydrogenated titanium alloy [J]. Rare Metal Materials and Engineering, 2014, 43(9): 2104-2107.
[7] 韩玉杰, 王耀奇, 侯红亮, 等. 置氢TC16钛合金微观组织与变形行为 [J]. 稀有金属材料与工程, 2017, 46(s1): 51-55. HAN Yujie, WANG Yaoqi, HOU Hongliang, et al. Microstructure and deformation behavior of hydrogenated TC16 titanium alloy [J]. Rare Metal Materials and Engineering, 2017, 46(s1): 51-55.
[8] 江训焱, 陈溢平, 王明, 等. 置氢TC4钛合金激光焊接接头超塑变形组织均匀性分析 [J]. 焊接学报, 2017, 38(8): 28-32. JIANG Xunyan, CHEN Yiping, WANG Ming, et al. Analysis of microstructure homogeneity of laser welded joints of hydrogenated TC4 titanium alloy [J]. Transactions of the China Welding Institution, 2017, 38(8): 28-32.
[9] ZONG Yingying, HUANG Shuhui, GUO Bin. In situ study of phase transformations in Ti-6Al-4V-xH alloys [J]. Transactions of Nonferrous Metals Society of China, 2015, 25(9): 2901-2911.
[10] ZONG Y Y, LIANG Y C, YIN Z W, et al. Effects of hydrogen addition on the high temperature deformation behavior of TC21 titanium alloy [J]. International Journal of Hydrogen Energy, 2012, 37(18): 13631-13637.
[11] 纪博宇, 李细锋, 李剑飞. 置氢Ti55钛合金变形本构方程及高温增塑机理研究 [J]. 塑性工程学报, 2018, 25(1): 180-186. JI Boyu, LI Xifeng, LI Jianfei. Deformation constitutive equation and high temperature plasticization mechanism of hydrogenated Ti55 Ti alloy [J]. Journal of Plasticity Engineering, 2018, 25(1): 180-186.
[12] OVCHINNIKOV A, SKVORTSOVA S, MAMOMOV A, et al. Influence of hydrogen on plastic flow of the titanium and its alloys [J]. Acta Metallurgica Slovaca, 2017, 23(2): 122.
[13] 卢俊强. 原位自生钛基复合材料的热氢处理研究 [D]. 上海: 上海交通大学, 2010: 51-54.
[14] 张伟福, 李淼泉, 林莺莺. 置氢Ti-6Al-4V钛合金的热压缩变形行为研究 [J]. 塑性工程学报, 2008, 15(6): 107-112. ZHANG Weifu, LI Miaoquan, LIN Yingying. Study on hot compression deformation behavior of hydrogenated Ti-6Al-4V titanium alloy [J]. Transactions of the China Welding Institution, 2008, 15(6): 107-112.
[15] 牛勇, 李晓华, 王耀奇, 等. 置氢对Ti-6Al-4V合金高温塑性变形的影响 [J]. 稀有金属材料与工程, 2008, 37(12): 2089-2093. NIU Yong, LI Xiaohua, WANG Yaoqi, et al. Effect of hydrogenation on high temperature plastic deformation of Ti-6Al-4V alloy [J]. Rare Metal Materials and Engineering, 2008, 37(12): 2089-2093.
[16] 袁宝国. 置氢Ti-6Al-4V合金室温变形行为及改性机理研究 [D]. 哈尔滨: 哈尔滨工业大学, 2010: 57.
[17] LUO L, SU Y, GUO J, et al. Formation of titanium hydride in Ti-6Al-4V alloy [J]. Journal of Alloys & Compounds, 2006, 425(1): 140-144.
[18] KIMURA H, IZUMI O. Titanium’80: science and technology [C]//Proceedings of the 4th International Conference on Ti. New York, USA: The Metallurgical Society of AIME, 1980: 2265.
[19] CHENG X L, ZHANG H, BAI B Z, et al. Investigation on high temperature compression behavior of hydrogenated Ti6Al4V alloy [J]. Materials Science & Technology, 2011, 27(10): 1547.
[20] 吴新强. TC4钛合金电子束焊接数值模拟及接头组织与性能 [D]. 南京: 南京航空航天大学, 2011: 52-66.
[2] 刘婉颖, 朱毅科, 林元华, 等. 热处理对TC4钛合金显微组织和力学性能的影响 [J]. 材料导报, 2013, 27(18): 108-111. LIU Wanying, ZHU Yike, LIN Yuanhua, et al. Effect of heat treatment on microstructure and mechanical properties of TC4 titanium alloy [J]. Materials Review, 2013, 27(18): 108-111.
[3] ZHAO Z, CHEN J, GUO S, et al. Influence of α/β interface phase on the tensile properties of laser cladding deposited Ti-6Al-4V titanium alloy [J]. Journal of Materials Science & Technology, 2017, 33(7): 675-681.
[4] WANG Y L, HUI S X, LIU R, et al. Dynamic response and plastic deformation behavior of Ti-5Al-2.5Sn ELI and Ti-8Al-1Mo-1V alloys under high-strain rate [J]. Rare Metals, 2014, 33(2): 127-133.
[5] 董显娟, 鲁世强, 王克鲁, 等. β转变组织TA15钛合金塑性流动失稳行为 [J]. 稀有金属材料与工程, 2018, 47(5): 1485-1491. DONG Xianjuan, LU Shiqiang, WANG Kelu, et al. Plastic flow instability behavior of titanium alloy TA15 with beta-transformation structure [J]. Rare Metal Materials and Engineering, 2018, 47(5): 1485-1491.
[6] 袁宝国, 刘大海, 李春峰. 置氢钛合金的除氢研究 [J]. 稀有金属材料与工程, 2014, 43(9): 2104-2107. YUAN Baoguo, LIU Dahai, LI Chunfeng. Study on dehydrogenation of hydrogenated titanium alloy [J]. Rare Metal Materials and Engineering, 2014, 43(9): 2104-2107.
[7] 韩玉杰, 王耀奇, 侯红亮, 等. 置氢TC16钛合金微观组织与变形行为 [J]. 稀有金属材料与工程, 2017, 46(s1): 51-55. HAN Yujie, WANG Yaoqi, HOU Hongliang, et al. Microstructure and deformation behavior of hydrogenated TC16 titanium alloy [J]. Rare Metal Materials and Engineering, 2017, 46(s1): 51-55.
[8] 江训焱, 陈溢平, 王明, 等. 置氢TC4钛合金激光焊接接头超塑变形组织均匀性分析 [J]. 焊接学报, 2017, 38(8): 28-32. JIANG Xunyan, CHEN Yiping, WANG Ming, et al. Analysis of microstructure homogeneity of laser welded joints of hydrogenated TC4 titanium alloy [J]. Transactions of the China Welding Institution, 2017, 38(8): 28-32.
[9] ZONG Yingying, HUANG Shuhui, GUO Bin. In situ study of phase transformations in Ti-6Al-4V-xH alloys [J]. Transactions of Nonferrous Metals Society of China, 2015, 25(9): 2901-2911.
[10] ZONG Y Y, LIANG Y C, YIN Z W, et al. Effects of hydrogen addition on the high temperature deformation behavior of TC21 titanium alloy [J]. International Journal of Hydrogen Energy, 2012, 37(18): 13631-13637.
[11] 纪博宇, 李细锋, 李剑飞. 置氢Ti55钛合金变形本构方程及高温增塑机理研究 [J]. 塑性工程学报, 2018, 25(1): 180-186. JI Boyu, LI Xifeng, LI Jianfei. Deformation constitutive equation and high temperature plasticization mechanism of hydrogenated Ti55 Ti alloy [J]. Journal of Plasticity Engineering, 2018, 25(1): 180-186.
[12] OVCHINNIKOV A, SKVORTSOVA S, MAMOMOV A, et al. Influence of hydrogen on plastic flow of the titanium and its alloys [J]. Acta Metallurgica Slovaca, 2017, 23(2): 122.
[13] 卢俊强. 原位自生钛基复合材料的热氢处理研究 [D]. 上海: 上海交通大学, 2010: 51-54.
[14] 张伟福, 李淼泉, 林莺莺. 置氢Ti-6Al-4V钛合金的热压缩变形行为研究 [J]. 塑性工程学报, 2008, 15(6): 107-112. ZHANG Weifu, LI Miaoquan, LIN Yingying. Study on hot compression deformation behavior of hydrogenated Ti-6Al-4V titanium alloy [J]. Transactions of the China Welding Institution, 2008, 15(6): 107-112.
[15] 牛勇, 李晓华, 王耀奇, 等. 置氢对Ti-6Al-4V合金高温塑性变形的影响 [J]. 稀有金属材料与工程, 2008, 37(12): 2089-2093. NIU Yong, LI Xiaohua, WANG Yaoqi, et al. Effect of hydrogenation on high temperature plastic deformation of Ti-6Al-4V alloy [J]. Rare Metal Materials and Engineering, 2008, 37(12): 2089-2093.
[16] 袁宝国. 置氢Ti-6Al-4V合金室温变形行为及改性机理研究 [D]. 哈尔滨: 哈尔滨工业大学, 2010: 57.
[17] LUO L, SU Y, GUO J, et al. Formation of titanium hydride in Ti-6Al-4V alloy [J]. Journal of Alloys & Compounds, 2006, 425(1): 140-144.
[18] KIMURA H, IZUMI O. Titanium’80: science and technology [C]//Proceedings of the 4th International Conference on Ti. New York, USA: The Metallurgical Society of AIME, 1980: 2265.
[19] CHENG X L, ZHANG H, BAI B Z, et al. Investigation on high temperature compression behavior of hydrogenated Ti6Al4V alloy [J]. Materials Science & Technology, 2011, 27(10): 1547.
[20] 吴新强. TC4钛合金电子束焊接数值模拟及接头组织与性能 [D]. 南京: 南京航空航天大学, 2011: 52-66.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |