宁波职业技术学院学报
寧波職業技術學院學報
저파직업기술학원학보
THE JOURNAL OF NINGBO POLYTECHNIC
2013年
6期
106-108
,共3页
激光熔覆%Ni基WC涂层%溶解%碳化物
激光鎔覆%Ni基WC塗層%溶解%碳化物
격광용복%Ni기WC도층%용해%탄화물
Laser cladding%Ni-based WC coating%dissolution%carbides
采用激光熔覆的方法在Q235钢表面制备了WC颗粒强化的Ni基涂层，研究了铸造WC颗粒在涂层内的溶解特征。结果表明：铸造WC颗粒在涂层底部几乎完全溶解并与扩散进入的Fe发生共晶反应形成粗大的鱼骨状形貌特征M6C型碳化物；在涂层中部，铸造WC颗粒完全溶解并析出M7C3，M12C与M23C6型碳化物；在涂层边部，大部分铸造WC颗粒发生部分溶解形成3-5μm 的M6C合金化反应层，保持了原有多角状结构与高硬度特征。
採用激光鎔覆的方法在Q235鋼錶麵製備瞭WC顆粒彊化的Ni基塗層，研究瞭鑄造WC顆粒在塗層內的溶解特徵。結果錶明：鑄造WC顆粒在塗層底部幾乎完全溶解併與擴散進入的Fe髮生共晶反應形成粗大的魚骨狀形貌特徵M6C型碳化物；在塗層中部，鑄造WC顆粒完全溶解併析齣M7C3，M12C與M23C6型碳化物；在塗層邊部，大部分鑄造WC顆粒髮生部分溶解形成3-5μm 的M6C閤金化反應層，保持瞭原有多角狀結構與高硬度特徵。
채용격광용복적방법재Q235강표면제비료WC과립강화적Ni기도층，연구료주조WC과립재도층내적용해특정。결과표명：주조WC과립재도층저부궤호완전용해병여확산진입적Fe발생공정반응형성조대적어골상형모특정M6C형탄화물；재도층중부，주조WC과립완전용해병석출M7C3，M12C여M23C6형탄화물；재도층변부，대부분주조WC과립발생부분용해형성3-5μm 적M6C합금화반응층，보지료원유다각상결구여고경도특정。
WC particles reinforced Ni-based coating is produced by laser cladding on the surface of Q235 steel. The dissolution characteristics of cast WC particles are investigated. The results show that the cast WC particles are dissolved almost completely in the bottom of coating, and interact with Fe from the substrate to precipitate the herringbone M6C carbides. In the center of coating, the cast WC particles are dissolved and the carbides such as M7C3, M12C and M23C6 are precipitated. At the edge of coating, most of cast WC particles are dissolved partially to form an alloyed layer identified as M6C, resulting in the preservation of polygonal and high hardness characteristics.
