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在Cu-21Sn-12Ti钎料中添加不同质量分数的B粉制备Cu-Sn-Ti+B复合钎料,然后在钎焊温度910℃保温10 min条件下钎焊Al2O3与Ti-6Al-4V合金。研究了原位生成TiB对Al2O3/Ti-6Al-4V合金接头微观结构及力学性能的影响。接头中原位生成的TiB呈晶须状均匀分布在Ti2Cu上,当采用TiB体积分数低于40%的钎料钎焊Al2O3与Ti-6Al-4V合金时,均可获得连接良好且界面致密的钎焊接头。随接头中TiB的体积分数增加,Ⅱ区中的Ti2(Cu,Al)含量增加,并逐渐变得连续,TiB的分布区Ⅲ范围增宽,Ti-6Al-4V合金向钎料中的溶解量增加。接头的室温抗剪强度随TiB的体积分数增加先上升后下降,当接头中TiB体积分数增至20%时,接头抗剪强度达最大,为70.1MPa。
Abstract：Al2O3 and Ti-6Al-4V alloy was brazed at brazing temperature of 910 ℃ and holding time of 10 min using Cu-Sn-Ti+B composite brazing filler metal,which was fabricated by adding B powder to Cu-21Sn-12Ti at different mass fractions.The effect of TiB whiskers synthesized in situ on the microstructure and mechanical properties of Al2O3/Ti-6Al-4V alloy joint was investigated.The TiB whiskers synthesized in situ during brazing were distributed evenly in Ti2Cu.The fine and compact joints of Al2O3/Ti-6Al-4V alloy could be obtained when the volume fraction of TiB was <40% in joint,Ti2(Cu,Al) intermetallics in zone Ⅱ of joint accordingly increased,their distribution became continuous,the distribution area of TiB,i.e.zone Ⅲ became wider and the dis-solved Ti,Al elements from Ti-6Al-4V alloy into filler metal increased with increasing the amount of TiB.The shear strength of joints at room temperature increased and then decreased with the increase of TiB.The shear strength of joint reached the maximum value of 70.1 MPa at the amount of TiB of 20%(in volume).
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基本信息:
DOI：10.14062/j.issn.0454-5648.2012.01.030
中图分类号:TG454
引用信息:
[1]杨敏旋,林铁松,甄公博,等.Al_2O_3/Cu-Sn-Ti+B钎料/Ti-6Al-4V合金连接的微观结构及力学性能[J].硅酸盐学报,2012,40(01):95-100.DOI:10.14062/j.issn.0454-5648.2012.01.030.
基金信息:
国家自然科学基金(50975062,51105107,51021002);; 中央高校基本科研业务费专项资金资助(HIT.BRET1.2010006,HIT.NSRIF.2010119);; 浙江省钎焊材料与技术重点实验室开放基金(0901);; 中国国家博士后基金(AUGA4130902510)项目资助
2011-12-29
2011-12-29
2011-12-29