CAJ | 학술논문

采用Ni+WC基粉末激光熔覆对严重磨损的高压水除鳞机用柱塞表面进行修复,利用光学显微分析和扫描电子显微分析方法,对熔敷层、结合层和基体进行显微组织观察及能谱分析,并测定了不同区域的显微硬度.结果表明:国外试样的基体是铁素体和奥氏体组成的双相钢,过渡层为Ni25、熔覆层为Ni60+WC的试样,熔覆层的组织分布均匀,熔覆层有大量的WC质点分布,显微硬度值较高,峰值硬度为1000 HV.
채용Ni+WC기분말격광용복대엄중마손적고압수제린궤용주새표면진행수복,이용광학현미분석화소묘전자현미분석방법,대용부층、결합층화기체진행현미조직관찰급능보분석,병측정료불동구역적현미경도.결과표명:국외시양적기체시철소체화오씨체조성적쌍상강,과도층위Ni25、용복층위Ni60+WC적시양,용복층적조직분포균균,용복층유대량적WC질점분포,현미경도치교고,봉치경도위1000 HV.
The laser cladding Ni+WC power technology was used to repair plunger piston surface.The microstructure of cladding layer,binder course and matrix were observed by OM and SEM analysis.Besides,different zones of micro-hardness Was measured through micro-hardness testing.The results show that the microstructure of foreign samples,matrix is ferrite and austenite.The sample is composed of transitional layer(Ni25)and cladding layer(Ni60+WC).The microstructure of the cladding layer is uniform and a lot of WC hard particles exist in it,the max value of microhardness is up to 1000HV.