钎焊立方氮化硼BCu80Ni5SnTi活性钎料的组织与性能

来源期刊：中国有色金属学报2009年第12期

论文作者：王 毅 殷世强 卢广林 李世权 邱小明

文章页码：2192 - 2197

关键词：CuNiSnTi；立方氮化硼；活性钎料；真空钎焊

Key words：CuNiSnTi; cubic boron nitride; active filler metal; vacuum brazing

摘    要：研制一种适合钎焊立方氮化硼与45钢异质材料的新型高温BCu80Ni5SnTi活性钎料，采用SEM、EDS及XRD对BCu80, Ni5SnTi系活性钎料的微观组织及钎焊接头力学性能进行研究。结果表明：适合钎焊c-BN的活性钎料成分为Cu78-81Ni5-6Sn3-5.5Ti10-12(质量分数，%)，固相线温度为858.4 ℃，液相线温度为874.8 ℃；钎料组织由α-Cu固溶体、Ni固溶体、Cu-Sn共晶及少量Cu₄Ti₃、Cu₃Ti₂、Cu₃Sn、CuSn和Ni₁₇Sn₃等化合物组成；该钎料对c-BN的润湿性较好，润湿角为28^o-30^o，钎焊c-BN与45钢的接头强度为210-230 MPa；新型钎料钎焊冶金特性较好，钎焊接头界面实现冶金结合。

Abstract: A new-type BCu80Ni5SnTi filler metal suitable for brazing cubic boron nitride (c-BN) and 45 steel was prepared. The microstructures of BCu80Ni5SnTi active filler metal and mechanical properties of the joints of c-BN and 45 steel brazed with BCu80Ni5SnTi filler metal were analyzed by SEM, EDS and XRD. The results show that the solidus and liquidus temperatures of the novel BCu78-81Ni5-6Sn3-5.5Ti10-12(mass fraction, %) active filler metal are 858.4 and 874.8 ℃, respectively. The microstructure of the filler metal mainly consists of α-Cu solid solution, Ni solid solution, Cu-Sn eutectic phase as well as a little Cu₄Ti₃,Cu₃Ti₂,Cu₃Sn,CuSn and Ni₁₇Sn₃ compounds. The wettability of the filler metal on c-BN is good and the contact angle is about 28^o-30o. The shear strength of the brazed joint between c-BN and 45 steel using this active filler metal reaches 210-230 MPa. The new-type BCu78-81Ni5-6Sn3-5.5Ti10-12(mass fraction, %) active filler metal possesses better brazing metallurgy characteristics. Chemical metallurgic joining forms in the interface between c-BN grits and BCu80Ni5SnTi active filler metal.

基金信息：国家自然科学基金重点资助项目
吉林省科技发展计划资助项目
长春市科技计划资助项目