CAJ | 학술논문

采用等离子喷焊技术在d100 mm×30 mm 45号钢圆柱基体上制备厚度为5 mm的高铝青铜喷焊层，将制备的喷焊工件在距基体底部分别为32、33和34 mm处进行水平切割，切割后留在基体上的喷焊层厚度分别为2、3和4 mm。在室温条件下，研究喷焊层中元素扩散对其组织、硬度和摩擦磨损性能的影响。结果表明：随分隔层位置从基体到喷焊层纵深方向距离的增加，Fe元素扩散作用减弱；靠近基体的喷焊层中Fe元素含量较多，富Fe的k相含量多，且呈点状或球状团聚在一起，喷焊层与铁基对摩件的组织相容性增加，在摩擦过程试样易与对摩件黏着；喷焊层硬度虽高，但磨损率较高；靠近喷焊层表面的喷焊层中Fe元素含量最低，k相相貌由粗大树枝状向细小树枝状和粒状组织转变，摩擦因数和磨损率均有所降低,黏着磨损受到抑制，主要磨损机理为磨粒磨损。
채용등리자분한기술재d100 mm×30 mm 45호강원주기체상제비후도위5 mm적고려청동분한층，장제비적분한공건재거기체저부분별위32、33화34 mm처진행수평절할，절할후류재기체상적분한층후도분별위2、3화4 mm。재실온조건하，연구분한층중원소확산대기조직、경도화마찰마손성능적영향。결과표명：수분격층위치종기체도분한층종심방향거리적증가，Fe원소확산작용감약；고근기체적분한층중Fe원소함량교다，부Fe적k상함량다，차정점상혹구상단취재일기，분한층여철기대마건적조직상용성증가，재마찰과정시양역여대마건점착；분한층경도수고，단마손솔교고；고근분한층표면적분한층중Fe원소함량최저，k상상모유조대수지상향세소수지상화립상조직전변，마찰인수화마손솔균유소강저,점착마손수도억제，주요마손궤리위마립마손。
High-aluminum bronze coating with a thickness of 5 mm was sprayed by plasma spray welding on 45 medium carbon steel with size ofd100 mm×30 mm. The workpieces were cut at zones of 32, 33, and 34 mm from the bottom of the substrate. The thicknesses of coatings on the substrate were 2, 3 and 4 mm, respectively. The effects of element diffusion on the phase structure, microhardness, friction and wear behavior were analyzed at room temperature. The results show that Fe element coming from substrate diffuses into the coating. With increasing the distance from the interface, Fe element diffusion decreases. The volume fraction of Fe-richk phase is relatively high on the sprayed layer near the substrate. This increases the compatibility of structure between the coating and Fe-based counterpart. Thek phase of coating gathers into spots or globules. Suchk phase tends to stick the counterpart during friction process, which even causes some particles. Therefore, its wear behavior is the worst despite of the high hardness of coating. However, in the sample near the surface of coating, the bulky dendritick phases change to small dendritic and granular ones, and thus results in a decrease of adhesive wear, which causes a low friction coefficient and wear rate. The wear mechanism is characterized as abrasive wear.