牙轮钻头轴承浮动套涂覆陶瓷膜的性能  

Properties of ceramic film coated on floating sleeve of roller bit bearing

作　　者：黄本生[1] 龚成龙[1] 邓龙[1] 陈松 肖晓华 

机构地区：[1]西南石油大学材料科学与工程学院,四川成都610500

出　　处：《金属热处理》2017年第10期132-138,共7页Heat Treatment of Metals

基　　金：四川省大学生创新训练项目(201510615060);西南石油大学大学生课外开放实验项目(KSZ14185)

摘　　要：分别以20Cr Ni Mo和20Ni4Mo钢为基体材料制成销、盘试件,利用CVD技术在销表面制备Ti C+Ti(C,N)+Ti N复合陶瓷膜和氧乙炔堆焊钴基焊丝。对比研究复合陶瓷膜销、真空淬火复合陶瓷膜销、堆焊钴基焊丝销在不同介质环境(泥浆、混合介质)中不同载荷条件(静载、冲击载荷)下磨损前后的表面形貌及磨损量,同时测定销试件表面显微硬度;并分析淬火前后销试件表面复合陶瓷膜的膜厚、结合强度,最终分析出试件表面耐磨性。结果表明:在20Cr Ni Mo钢表面涂覆复合陶瓷膜(Ti C+Ti(C,N)+Ti N),无论是否进行真空淬火,用其制成的销试件硬度均较高,能有效降低粘着磨损。淬火复合陶瓷膜销与20Ni4Mo钢组成的摩擦副的抗磨损、抗冲击能力都较好。20 Cr Ni Mo and 20 Ni4 Mo steel were used as matrix materials to be made into pin and disc specimens respectively. The Ti C ＋ Ti（ C,N） ＋ Ti N composite ceramic film were preparedon the surface of the part of the pins by CVD technology. And,cobalt based welding wire were welded on the surface of the other part of the pins by oxyacetylene surfacing technology. The surface morphology and wear extent before and after wear of composite ceramic film pin,vacuum quenching composite ceramic film pin and welding of cobalt based wire pinin different medium environments（ slurry,mixed medium） and under different loading conditions（ static load,impact load） were compared and studied. At the same time,microhardness of the surface of pin specimens was measured. The thickness and the bonding strength of composite ceramic film on the surface of pin specimens were analyzed before and after quenching. Finally,wear resistance of the specimens was analyzed. The results show that the surface of 20 Cr Ni Mo steel is covered with the ceramic composite film（ Ti C ＋ Ti（ C,N） ＋ Ti N）,no matter whether vacuum quenching is carried out,the pin which is made from it has higher hardness,can effectively reduce the adhesion wear. Both the wear resistance and the impact resistance of friction pair composed of quenching composite ceramic film pin and 20 Ni4 Mo steel are better.

关 键 词：复合陶瓷膜 结合强度 耐磨性 硬度 化学气相沉积技术 

分 类 号：TB332[一般工业技术—材料科学与工程]