Fusion welding of TA2/Q235 composite plate was carried out by taking Ni alloy as filled material. The microstructure, chemical, phase composition and mechanical properties of the weld metal were investigated. Results showed that the microstructure of TA2 coating was mainly lath α-phase and microstructure of Q235 matrix was massive pearlite and ferrite near the weld zone. In the weld, microstructure of Ti layer was mainly a dendritic growth of β-phase, containing NiTi2, Ni3Ti, TiFe, TiFe2 and TiCr2. Microstructure of Ni alloy layer was mainly γ-Ni, and contained a small amount of Fe3Ni2, CrNi2 and (CrNiMo) compounds. Between Ti layer and Ni layer, there was a transition layer width of 50 μm, and a lot of needle were in the transition layer such as NiTi2 and NiTi intermetallic compound coated by CrNi2 phase. From the Ti layer to the Ni alloy layer, element Ti decreased slowly, Ni increased first and then decreased and Cr, Mo element increased slowly. The intermetallic and brittle phases in the Ti layer and the transition layer increased the hardness and reduced the ductility.
ZHANG Yayun
,
WEI Jinshan
,
QI Yanchang
,
MA Chengyong
,
XU Yusong
. Microstructure and property of fusion welding butt joints of TA2/Q235 composite plate with Ni alloy transition layers[J]. Transactions of The China Welding Institution, 2019
, 40(1)
: 75
-79
.
DOI: TG442
[1] 汪汀. 钛/钢复合板反应釜筒体的焊接工艺[J]. 材料开发与应用, 2003, 18(2):15-18 Wang Ting. Welding process of reaction tube body of titanium steel composite plate[J]. Development and Application of Materials, 2003, 18(2):15-18
[2] 陈满乾, 刘亚芬. TA2/Q235B钛钢复合板的焊接[J]. 焊接, 2007(8):53-55 Chen Manqian, Liu Yafen. Welding of TA2/Q235B titanium steel composite plate[J]. Welding & Joining, 2007(8):53-55
[3] Kundu S, Ghosh M, Laik A, et al. Diffusion bonding of commercially pure titanium to 304 stainless steel by using copper interlayer[J]. Materials Science and Engineering A, 2005, 407(1-2):154-160.
[4] 孙荣禄, 杨文杰, 于斌, 等. 钛合金与不锈钢扩散焊中间金属的选择[J]. 宇航材料工艺, 1997(5):15-18 Sun Ronglu, Yang Wenjie, Yu Bin, et al. Selection of intermediate metals for diffusion welding of titanium alloy and stainless steel[J]. Aerospace Materials & Technology, 1997(5):15-18
[5] Kundu S, Sam S, Mishra B, et al. Diffusion bonding of microduplex stainless steel and Ti alloy with and without interlayer:interface microstructure and strength properties[J]. Metallurgical and Materials Transactions A, 2014, 45(1):371-383.
[6] 孙荣禄, 李慕勤, 张九海, 等. 中间过渡金属对钛合金与不锈钢扩散焊接头强度的影响[J]. 焊接学报, 1996, 27(4):212-218 Sun Ronglu, Li Muqin, Zhang Jiuhai, et al. Effect of intermediate transition metal on the strength of titanium alloy and stainless steel diffusion welded joints[J]. Transactions of the China Welding Institution, 1996, 27(4):212-218
[7] 孙玮. 氩弧焊接TA2及Ti62421s合金组织、性能的研究[D]. 长沙:中南大学, 2012.
[8] 王敬忠, 颜学柏, 阎静亚, 等. 钛-钢复合板生产中的过渡层材料[J]. 有色金属工程, 2009, 61(4):39-42 Wang Jingzhong, Yan Xuebai, Yan Jingya, et al. Transition layer materials in the production of titanium-steel composite sheets[J]. Nonferrous Metals Engineering, 2009, 61(4):39-42
[9] 吴伟刚, 张敏, 丁旭, 等. TA1/X80复合板用TiNi/NiCrMo双过渡层熔焊对接接头组织及性能[J]. 材料研究学报, 2016(5):372-378 Wu Weigang, Zhang Min, Ding Xu, et al. Microstructure and properties of butt joints of TiNi/NiCrMo double transition layer welded joints for TA1/X80 composite sheets[J]. Chinese Journal of Materials Research, 2016(5):372-378
[10] Qin B, Sheng G M, Huang J W, et al. Phase transformation diffusion bonding of titanium alloy with stainless steel[J]. Materials Characterization, 2006, 56(1):32-38.
[11] Okamoto H. Cr-Ti (chromium-titanium)[J]. Journal of Phase Equilibria, 2002, 23(4):382.
[12] 葛鹏, 吴欢, 赵永庆. Mo、V、Cr对钛合金β相的合金化效应[J]. 中国材料进展, 2016, 35(10):795-798 Ge Peng, Wu Huan, Zhao Yongqing. Alloying effect of Mo, V and Cr on β phase of titanium alloy[J]. Materials China, 2016, 35(10):795-798
