CAJ | 학술논문

为了达到研究预置激光熔覆可以在45钢上制备Ni基非晶合金涂层的目的,采用非晶形成能力三判据原则及非晶成分团簇线定律法则,选择了采用常规非晶合金制备方法中具有极大玻璃形成能力(GAT)的Ni_(59.35)Nb_(34.45)Sn_(6.2)合金粉末,在保护气氛下,制备非晶涂层,并对不同输出功率下得到的涂层进行微观组织和结构表征及性能测试.结果表明:激光熔覆Ni_(59.35)Nb_(34.45)Sn_(6.2)涂层中除含有非晶相外还含有Nb_3Sn、Nb_2Ni、Ni_3Sn_2及Ni和Sn的氧化物相.当激光功率为3300 W时,熔覆层表层显微硬度值最大为1638.1 HK;涂层由于非晶相的存在耐蚀性有明显提高,在该功率下致盹电流密度和维钝电流密度都达到最小,分别为1.3537 mA/cm~2和0.2652 mA/cm~2.
위료체도연구예치격광용복가이재45강상제비Ni기비정합금도층적목적,채용비정형성능력삼판거원칙급비정성분단족선정율법칙,선택료채용상규비정합금제비방법중구유겁대파리형성능력(GAT)적Ni_(59.35)Nb_(34.45)Sn_(6.2)합금분말,재보호기분하,제비비정도층,병대불동수출공솔하득도적도층진행미관조직화결구표정급성능측시.결과표명:격광용복Ni_(59.35)Nb_(34.45)Sn_(6.2)도층중제함유비정상외환함유Nb_3Sn、Nb_2Ni、Ni_3Sn_2급Ni화Sn적양화물상.당격광공솔위3300 W시,용복층표층현미경도치최대위1638.1 HK;도층유우비정상적존재내식성유명현제고,재해공솔하치순전류밀도화유둔전류밀도도체도최소,분별위1.3537 mA/cm~2화0.2652 mA/cm~2.
In order to reach the purpose of using pre-laser cladding method preparation of Ni-based amorphous alloy coatings on 45 steel substrate surface by the method was carried out. The principles of the three clusters and the amorphous line of the law of composition rules were used. The Ni_(59.35)Nb_(34.45)Sn_(6.2) alloying powder which has a great glass-forming ability (GAT) in conventional preparation methods of amorphous alloys was chosen. In the protection of atmosphere, the amorphous surface coating was prepared. The microstructure, micro-hardness and performance of the different output power of the laser cladding were analyzed. The results show that, the laser cladding Ni_(59.35)Nb_(34.45)Sn_(6.2) amorphous composite coating include amorphous and Nb_3Sn, Nb_2Ni, Ni_3Sn_2, Ni and Sn oxide phase. When the power is 3300 W, the micro-hardness of the coating surface reaches as high as 1638.1 HK; Coating has improved corrosion resistance due to the existence of amorphous. In the power, induced blunt-dimensional current density and current density reach a minimum, they are 1.3537 and 0.2652 mA/cm~2.