CAJ | 학술논문

采用铜箔/90W-10Ni(质量分数)混合粉末/镍箔多中间层，在加压5 MPa、连接温度1150°C、保温60 min的工艺条件下，对纯钨(W)和0Cr13Al铁素体不锈钢进行真空扩散连接。利用SEM、EDS、电子万能试验机及水淬热震实验等手段研究接头的微观组织、成分分布、断口特征、力学性能及抗热震性能。结果表明，连接接头由钨母材/Cu-Ni合金层/W-Ni复合材料层/镍层/钢母材五部分组成。接头中的W-Ni复合材料层由90W-10Ni混合粉末固相烧结而生成，其组织均匀、致密。W-Ni复合材料层与钨母材以瞬间液相扩散连接机制来实现良好结合。接头剪切强度达到256 MPa，断裂均发生在W-Ni复合材料层与镍层的结合区域，断口形貌呈现为韧性断裂。经过60次700°C至室温的水淬热震测试，接头无裂纹出现。
채용동박/90W-10Ni(질량분수)혼합분말/얼박다중간층，재가압5 MPa、련접온도1150°C、보온60 min적공예조건하，대순오(W)화0Cr13Al철소체불수강진행진공확산련접。이용SEM、EDS、전자만능시험궤급수쉬열진실험등수단연구접두적미관조직、성분분포、단구특정、역학성능급항열진성능。결과표명，련접접두유오모재/Cu-Ni합금층/W-Ni복합재료층/얼층/강모재오부분조성。접두중적W-Ni복합재료층유90W-10Ni혼합분말고상소결이생성，기조직균균、치밀。W-Ni복합재료층여오모재이순간액상확산련접궤제래실현량호결합。접두전절강도체도256 MPa，단렬균발생재W-Ni복합재료층여얼층적결합구역，단구형모정현위인성단렬。경과60차700°C지실온적수쉬열진측시，접두무렬문출현。
Diffusion bonding between tungsten and 0Cr13Al stainless steel using a Cu/90W-10Ni powder mixtures/Ni multi-interlayer was carried out in vacuum at 1150 °C with a pressure of 5 MPa for 60 min. The microstructures, composition distribution and fracture characteristics of the joint were studied by SEM and EDS. Joint properties were evaluated by shear experiments and thermal shock tests. The results showed that the joints comprised tungsten/Cu-Ni sub-layer/W-Ni composites sub-layer/Ni sub-layer/0Cr13Al stainless steel. The W-Ni composites sub-layer with a homogeneous and dense microstructure was formed by solid phase sintering of 90W-10Ni powder mixtures. Sound bonding between tungsten base material and W-Ni composites sub-layer was realized based on transient liquid phase (TLP) diffusion bonding mechanism. Joints fractured at bonding zone of W-Ni composites sub-layer and Ni sub-layer during shear testing, and the average strength was 256 MPa. Thermal shock tests showed that joints could withstood 60 thermal cycles quenching from 700 °C to room temperature.