(哈爾濱工業(yè)大學(xué)現(xiàn)代焊接生產(chǎn)技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室，哈爾濱 150001)
摘 要: 研究了亞微米級(jí)Al2O3p/6061Al復(fù)合材料擴(kuò)散焊接頭強(qiáng)度隨焊接參數(shù)的變化規(guī)律, 采用掃描電鏡、 透射電鏡等手段分析了接頭區(qū)域微觀組織，探討了焊接參數(shù)、接頭微觀組織與接頭宏觀性能之間的聯(lián)系。指出焊接溫度是復(fù)合材料擴(kuò)散焊接最重要的工藝參數(shù)，焊接溫度介于基體合金固相線與液相線之間，接頭強(qiáng)度最高值可達(dá)到170 MPa；接合界面的氧化膜阻礙基體原子的擴(kuò)散，是復(fù)合材料接頭強(qiáng)度下降的原因之一。在此基礎(chǔ)上成功地實(shí)現(xiàn)了亞微米級(jí)Al2O3p/6061Al復(fù)合材料的擴(kuò)散連接。
關(guān)鍵字: 復(fù)合材料；擴(kuò)散焊；焊接接頭強(qiáng)度
（National Key Laboratory of Advanced Welding Production Technology,
Harbin Institute of Technology，Harbin 1150001，P.R.China）
Abstract: The variation of joint strength with the welding parameters when welding submicron composite Al2O3p/6061Al was studied. The microstructures of joint was analyzed by using TEM and SEM, and the relationships between welding parameters, microstructure and macro properties of welded joint were investigated. The results indicate that the welding temperature is the most important factor for diffusion welding of composite. When the welding temperature range is between solidus and liquidus, the peak joint strength can reach 170MPa. In addition, the results also indicate that oxide film is the reason to prevent atom diffusion and thus it will reduce joint strength.
Key words: composite materials; diffusion welding; welded joint strength
