氩弧熔覆原位自生TiC-TiB增强铁基复合涂层组织与性能

以碳粉、钛粉、硼粉和铁粉末为原料,利用氩弧熔覆技术在16Mn钢基材表面成功制备出铁基增强相复合涂层,运用XRD,SEM等分析手段研究了复合涂层的显微组织,利用显微硬度仪测试了复合涂层的显微硬度,并用磨损试验机分析了其在室温干滑动磨损条件下的耐磨性能.结果表明,复合涂层与基体界面无气孔、裂纹,呈冶金结合.复合涂层由TiB,TiC,Fe₂Ti和α-Fe组成.显微硬度和耐磨性测试结果表明,该复合涂层显微维氏硬度高达1000 MPa左右.常温干滑动磨损条件下,复合涂层具有优异的耐磨性.

Microstructure and properties of in-situ synthesized TiC-TiB reinforced Fe based composite coating by argon arc cladding

Fe-based composite coating was prepared on the 16Mn steel surface by means of argon arc cladding technique with the pre-alloyed powder of C, Ti, B and Fe. The microstructure was examined by using X-ray diffraction and scanning electron microscope. The microhardness of the composite coating was measured using the microhardness meter and the wear resistance was analyzed using the wear testing machine in the condition of dry sliding wear at room temperature. The result showed that the interface between the coating and substrate had excellent bonding being free of pores and cracks. The composite coating consisted of TiB,TiC,Fe₂Ti and α-Fe particles. The microhardness of the coating was about 1000 MPa. Wear test results showed that the the composite coating has excellent wear resistance under the dry sliding wear conditions..