采用铁钴镍合金夹层的316L/EH40复合板界面特征

 为了提高带夹层不锈钢复合板层间真空度,提出采用熔融态金属制备夹层的方法。基于真空吸铸成型原理,选取等原子比配比的铁、钴、镍合金作为夹层材料,加热至熔融状态,在真空压力差作用下向复合坯料充型夹层。采用数值模拟方法确定充型工艺参数,对充型样件进行热轧成形试验,通过光学显微镜、扫描电子显微镜等仪器表征分析了复合板的界面形貌特征。结果表明,夹层填充完整且充型率达到100%,拉伸强度和拉剪强度分别为490和319 MPa,铁钴镍合金与不锈钢和碳钢结合界面平直,复合状态良好且洁净无氧化物,热轧后夹层厚度大于碳和铬元素的扩散距离,能够避免铬的碳化物生成。

Interfacial structure of 316L/EH40 clad plate with iron-cobalt-nickel alloy as interlayer

In order to improve the vacuum degree of stainless steel clad plate with layer. A method for preparing layer from molten metal is proposed. Based on vacuum suction molding principle. With equal atomic ratio Fe-Co-Ni alloy is selected as the layer material. Filling it into the composite billet under the effect of vacuum pressure with a molten state. The hot rolling test is used to perform the hot compression forming test on the filling test,which process parameters is simulated by numerical simulation method. The morphology of the interface of the clad plate is analyzed by optical microscope SEM and other instruments. The results showed that,the layer is completely filled and the filling rate reaches 100%. The tensile strength and shear strength are 490 MPa and 319 MPa. The interface between Fe-Co-Ni alloy and stainless steel and carbon steel is flat,compound well and less oxide. The thickness of the layer after compression is greater than the diffusion distance of carbon and chromium and avoid chromium carbide formation.