摘要
通过烧结铝粉和碳化硅微粒制备SiC/Al复合材料,以组成(质量分数/%)分别为Al-20SiC、Al-20SiC-20Zn、Al-20 SiC-40Zn的填料作为中间层材料,在420,520,600℃焊接温度下对复合材料进行扩散焊接,研究了填料中锌含量与焊接温度对复合材料接头性能的影响。结果表明:在420℃焊接后,接头附近的锌呈明显团聚状态,而在520,600℃焊接后,接头附近未见锌团聚现象,较高的焊接温度有助于锌的均匀扩散;采用Al-20SiC-40Zn填料并在520℃焊接后,接头发生了氧化,形成明显的裂纹;采用Al-20SiC-20Zn填料焊接后试样的剪切强度大于采用Al-20SiC和Al-20SiC-40Zn填料的,且随着焊接温度的升高而增大;随着填料中锌含量的增加,接头的硬度提高,且均高于母材的;接头的硬度随着焊接温度的升高而增大,但增幅减小。
Al/SiC composites were prepared by sintering aluminum powder and silicon carbide particles.The diffusion welding was conducted on the composite with fillers of Al-20SiC(mass fraction/%),Al-20SiC-20Zn,and Al-20SiC-40Zn as interlayer materials at 420,520,600℃,and the effects of Zn content in filler and welding temperature on the properties of joint of the composite were studied.The results show that the Zn near the joint was obviously agglomerated after welding at 420℃,and was not agglomerated after welding at 520,600℃,indicating relatively high welding temperature contributed to uniform diffusion of Zn.The oxidation occurred at the joint after welding at 520℃with Al-20SiC-40Zn filler,resulting in the obvious cracks at joint.The shear strength of the samples after welding with Al-20SiC-20Zn filler was bigger than that with Al-20SiC and Al-20SiC-40Zn fillers,and increased with increasing welding temperature.With increasing Zn content in the filler,the hardness of the joint increased,and was higher than that of the base metal.The hardness of the joint increased with increasing welding temperature,but the increase amplitude decreased.
作者
陆宝山
李有智
关集俱
LU Baoshan;LI Youzhi;GUAN Jiju(Suzhou Vocational Institute of Industrial Technology,Suzhou 215104,China)
出处
《机械工程材料》
CAS
CSCD
北大核心
2021年第3期21-28,共8页
Materials For Mechanical Engineering
基金
国家自然科学基金青年基金资助项目(51805345)
江苏省自然科学基金青年基金资助项目(BK20170373)
苏州市重点实验室资助项目(SZS201815)。
