【摘 要】
：
针对钛合金薄壁结构的钎焊制造技术,通过研究在钎料作用和不同钎焊温度下基体材料的微观组织、相变点、刚度和屈服强度的变化发现,钎料元素扩散导致TC1材料相变点降低,在875
【机 构】
：
中航工业北京航空制造工程研究所,北京100024航空焊接与连接技术航空科技重点实验室,北京100024;
论文部分内容阅读
针对钛合金薄壁结构的钎焊制造技术,通过研究在钎料作用和不同钎焊温度下基体材料的微观组织、相变点、刚度和屈服强度的变化发现,钎料元素扩散导致TC1材料相变点降低,在875℃发生α+β→β相转变,而TC4钛合金直至905℃尚未发生α+β→β相转变.在875℃下,随着保温时间延长,TC4材料的晶粒尺寸有所长大,导致刚度和屈服强度明显下降.当钎焊温度为875℃,保温时间不大于60min时,TC4钛合金板材的刚度和屈服强度不低于原始材料的86％.确定出TC4/TC1钛合金异质钎焊工艺范围为865～875℃、保温30～60min.研究结果为钛合金蜂窝结构的钎焊制造技术提供理论依据和参考.
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