Interlayer engineering for titanium clad steel by hot roll bonding

被引:34
作者
Chai, Xi-yang [1 ,2 ]
Pan, Tao [1 ]
Chai, Feng [1 ]
Luo, Xiao-bing [1 ]
Su, Hang [1 ]
Yang, Zhi-gang [2 ]
Yang, Cai-fu [1 ]
机构
[1] Cent Iron & Steel Res Inst, Dept Struct Steels, Beijing 100081, Peoples R China
[2] Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China
关键词
Titanium clad steel; Interlayer; Interfacial microstructure; Brittle phase; Micro-void; DIFFUSION-BONDED JOINTS; STAINLESS-STEEL; STRENGTH PROPERTIES; INTERFACE; MICROSTRUCTURE; ALLOY; PLATE;
D O I
10.1007/s42243-018-0106-3
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
Hot roll bonding was carried out between commercially pure titanium TA2 and high-strength low-alloy steel Q390 using pure Nb or Mo interlayer at 950 A degrees C with a total reduction ratio of 86.7%. Interfacial microstructure and bonding properties of titanium clad steel plates were investigated by electron microscopy and mechanical tests. The results showed beta-Ti, TiC and Fe2Ti reaction phases were generated at Ti/steel interface for the clad plates with no interlayer. Inserting Nb or Mo interlayer can effectively suppress the formation of brittle phases, while the weak bonding joint transferred to Nb/steel or Mo/steel interface. And some micro-voids were found at the interface of Nb/steel and Mo/steel. The improved shear strength of clad plates with Nb interlayer might be attributed to the elimination of brittle phases at bonding interface. The small size and little quantities of the micro-voids at Nb/steel interface had a relatively weak effect on shear strength. However, the large number and big size of micro-voids were responsible for the degradation of shear strength for the clad plates with Mo interlayer.
引用
收藏
页码:739 / 745
页数:7
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