CAJ | 학술논문

利用动力学软件Dictra中的单相扩散模型模拟计算耐蚀合金与碳钢热等静压扩散焊接结合界面附近的元素浓度分布,并根据热力学相图计算建立获得扩散反应层内微观组织与界面元素浓度分布之间的关系.计算结果表明:该模拟方法能够准确描述热等静压扩散焊接过程中的元素浓度分布规律,同时能够预测扩散反应层内的微观组织变化.在此基础上,利用这一模型计算得出温度和时间对扩散焊接过程中元素互扩散规律的影响,结合元素扩散距离与界面结合质量之间的关系,得到耐蚀合金与碳钢可以实现界面良好结合的工艺条件:1050℃/200MPa/2.5～3h,1100℃/200MPa/1h,1150℃/200MPa/0.5h等.
이용동역학연건Dictra중적단상확산모형모의계산내식합금여탄강열등정압확산한접결합계면부근적원소농도분포,병근거열역학상도계산건립획득확산반응층내미관조직여계면원소농도분포지간적관계.계산결과표명:해모의방법능구준학묘술열등정압확산한접과정중적원소농도분포규률,동시능구예측확산반응층내적미관조직변화.재차기출상,이용저일모형계산득출온도화시간대확산한접과정중원소호확산규률적영향,결합원소확산거리여계면결합질량지간적관계,득도내식합금여탄강가이실현계면량호결합적공예조건:1050℃/200MPa/2.5～3h,1100℃/200MPa/1h,1150℃/200MPa/0.5h등.
The elements distribution near interface during hot isostatic pressing (HIP) and diffusion bonding was simulated with DICTRA by signal phase model, and the relation between microstructure in diffusion reaction layer and elements distribution was constructed by equilibrium phase diagram calculation. The comparison between experimetal and calculated results indicated that the simulation model and equilibrium phase diagram calculation can exactly describe the elements distribution law and predict microstructure variation near interface. Morever, the influence of temperature and time on element distribution law were simulated.According to the relations between element diffusion distances and interface bonding quality, a series of proper processing parameters were obtained, including 1050℃/200MPa/2.5-3h,1100℃/200MPa/1h,1150℃/200MPa/0.5h et al.