(1. 華東理工大學(xué) 材料科學(xué)與工程學(xué)院，上海 200237；
2. 中國礦業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，徐州 221008；
3. 寧波工程學(xué)院 材料工藝研究所，寧波 315016)
摘 要: 采用放電等離子燒結(jié)(SPS)技術(shù)，利用MoSi2/316L梯度材料作為過渡層連接MoSi2與316L不銹鋼，并運(yùn)用有限元軟件ANSYS對(duì)MoSi2與316L不銹鋼接頭制備過程中所產(chǎn)生的殘余應(yīng)力進(jìn)行分析。結(jié)果表明：隨成分分布指數(shù)P增加，最大徑向和軸向殘余拉應(yīng)力先減后增，當(dāng)P＝0.8時(shí)，兩者同時(shí)接近最小，且MoSi2側(cè)的最大徑向拉應(yīng)力較小；隨梯度層數(shù)n增加，最大徑向和軸向殘余拉應(yīng)力逐漸減小，當(dāng)n＝9時(shí)，最大徑向和軸向殘余拉應(yīng)力分別降為n＝0時(shí)的24%和25%，且梯度層繼續(xù)增多時(shí)，變化趨勢變得平緩；隨梯度層厚度d增加，最大徑向和軸向殘余拉應(yīng)力逐漸減小，當(dāng)d=1.0 mm時(shí)，變化趨勢平緩；利用P＝0.8、d＝1.0 mm、n=9的MoSi2/316L梯度材料作為過渡層體系獲得致密且均勻的連接接頭。
關(guān)鍵字: MoSi2；316L不銹鋼；連接；梯度過渡層；殘余應(yīng)力
of MoSi2/316L stainless steel joining
（1. School of Materials Science and Engineering, East China University of Science and Technology, Shanghai
200237, China;
2. School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 22100,
China;
3. Institute of Techniques, Ningbo Institute of Engineering, Ningbo 315016, China）
Abstract:The feasibility of joining MoSi2 to 316L stainless steel with spark plasma sintering(SPS) techniques was investigated with MoSi2 /316L stainless steel graded material as the interlayer system. The residual stresses in the joint were analyzed by finite element software ANSYS. The results show that with the increase of compositional distribution exponent (P), the maximum radial and axial residual tension stresses increase firstly then decrease, approach to the minimum simultaneously when P=0.8, and the maximum radial tension stress of MoSi2 side is relatively little. With increasing graded layer number (n), the maximum radial and axial residual tension stresses decrease gradually; When n is 9 the maximum radial and axial residual tension stresses are reduced by 24% and 25%, respectively, compared with those when n is 0, and both of the trends become smooth when n continues to increase gradually. With the increase of the graded layer thickness (d), the maximum radial and axial residual tension stresses decrease gradually, the trend becomes smooth when d=1.0 mm. The dense, uniform joints are obtained by using MoSi2/316L graded material as the interlayer system when P=0.8, d=1.0 mm and n=9.
Key words: MoSi2; 316L stainless steel; joining; graded interlayer; residual stress
