界面微观组织对真空轧制复合纯钛/低合金高强钢界面力学性能的影响  

Effect of Interfacial Microstructure on Mechanical Properties of Vacuum Rolling Clad Pure Titanium/High Strength Low Alloy Steel

作　　者：骆宗安[1] 谢广明[1] 王光磊[1] 王国栋[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,沈阳110819

出　　处：《材料研究学报》2013年第6期569-575,共7页Chinese Journal of Materials Research

基　　金：中央高校基本科研业务N090307003;N120407004和N110607001资助项目~~

摘　　要：在850、900和950℃不同轧制温度、1×10-2Pa的高焊接真空度以及90%的总轧制压下率条件下,用真空轧制复合技术制备无中间层的纯钛/钢/纯钛三层复合板,研究了界面微观组织结构对界面结合性能的影响。结果表明,在850℃轧制温度下,复合界面层由0.5μm厚的连续TiC薄层组成;在900和950℃轧制温度下,界面层由连续的TiC薄层和β-Ti相组成,且随着轧制温度的提高界面层厚度逐渐增加。在不同轧制温度下在钢中靠近界面处均发现了铁素体带,且随着轧制温度的提高铁素体带的宽度明显增大。在900℃轧制温度下得到了最高的界面剪切强度337 MPa,且剪切断裂发生在TiC层和钢的界面上,复合板弯曲到180°复合界面没有宏观和微观开裂,显示了优异的界面结合性能。At different rolling temperatures of 850, 900 and 950℃ with constant vacuum level of1× 10-2 Pa and total rolling reduction ratio of 90%, the three-layer clad plates of pure Ti/high strength low al- loy （HSLA） steel/pure Ti were successfully fabricated via vacuum rolling cladding （VRC） without the addi- tion of interlayer, and the influence of interfacial microstructures on the bonding properties of the clad in- terface was investigated in detail. At a rolling temperature of 850℃, the clad interface only contained con- tinuous TiC layer 0.5μm in thickness, while at rolling temperatures of 900 and 950℃, the interface con- sisted of TiC and β-Ti. With increasing the rolling temperature, the interracial thickness gradually in- creased. Under various rolling temperatures, an obvious ferrite band was detected in the HSLA steel side adjacent to the clad interface, and this width significantly increased as the rolling temperature increased. At a rolling temperature of 900℃, a maximum interfacial shear strength of 337 MPa with the fracture oc- curring at the interface between HSLA steel and TiC was achieved, and after 180° bending testing, no macro/micro-crack was generated at the clad interface, showing sound bonding properties of the clad plate through VRC. KEY＇WORDS metallic materials, vacuum rolling cladding, pure titanium, interface, microstructure, me- chanical properties

关 键 词：金属材料 真空轧制复合 纯钛 界面 微观组织 力学性能 

分 类 号：TG142[一般工业技术—材料科学与工程]