CAJ | 학술논문

运用自制的包含金属化的金刚石和硬质合金复合堆焊焊条,以O2-C2H2焰为焊接热源进行堆焊,制备了含有金刚石的复合堆焊层.采用X射线衍射仪(XRD)、光学显微镜、材料性能实验机、动载磨料磨损实验机等实验手段和方法进行了金刚石表面和复合堆焊层形貌分析,堆焊层与基体的结合强度及堆焊层在动载荷条件下耐磨损性能的测试.研究表明:金刚石经过金属化处理后表面具有一定的金属性和浸润性,通过一定堆焊工艺在钢齿牙轮钻头齿面形成了组织致密均匀、硬质点与基体熔合良好的强化层,其抗剪强度达到了625 MPa,磨损量减少了10%～70%,延长了钻头的使用寿命.
운용자제적포함금속화적금강석화경질합금복합퇴한한조,이O2-C2H2염위한접열원진행퇴한,제비료함유금강석적복합퇴한층.채용X사선연사의(XRD)、광학현미경、재료성능실험궤、동재마료마손실험궤등실험수단화방법진행료금강석표면화복합퇴한층형모분석,퇴한층여기체적결합강도급퇴한층재동재하조건하내마손성능적측시.연구표명:금강석경과금속화처리후표면구유일정적금속성화침윤성,통과일정퇴한공예재강치아륜찬두치면형성료조직치밀균균、경질점여기체용합량호적강화층,기항전강도체도료625 MPa,마손량감소료10%～70%,연장료찬두적사용수명.
Composite repair welding layers with diamond are obtained by Repair Welding with Composite welding rod containing diamond and Carbide through O_2-C_2H_2 flaming.Morphology of composite repair welding layers and diamond surface after metalizing are analyzed with optical microscope and XRD,and bonding strength between repair welding layers and substrate and wear resistance of repair welding layers are tested by material testing machine and abrasion tester.The results show that diamond surface after metalizing has certain metallicity and wettability.The complex layers are compacted and well-proportioned,the shear strength of which is 625 MPa and wear value is reduced by 10%～70%.The complex layers prolong the working life of steel tooth roller cone bit.