热处理万向轴辊端轴套MAG堆焊再制造成形层摩擦学性能

Tribology properties of remanufacturing forming layer for joint sleeve of cardan axis by MAG surfacing after heat treatment

针对万向轴辊端轴套服役环境特点及失效形式,采用自研制备的药芯焊丝进行了辊端轴套MAG堆焊再制造成形试验,并对比测试了淬火热处理后的再制造成形层与基材的摩擦学性能。结果显示,试验温度100℃,湿度35%~45%微动摩擦条件下,淬火热处理后的再制造成形层与基材的磨损机制是粘着磨损+磨粒磨损的混合磨损,基材磨损试样表面层片状脱落面积较大,且磨损量要大于淬火热处理后的再制造成形层磨损量,说明淬火热处理后的再制造成形层微动摩擦学性能要优于基材,自研药芯焊丝具备进行万向轴辊端轴套再制造延寿的使用基础。

The self-developed cored wire was adopted to practice remanufacturing experiment on joint sleeve with MAG surfacing deposition technology,aimed at the analysis on service environment characteristic and failure mode.Then,tribology properties were tested and compared between the quenched forming layer and substrate.The result shows that the worn mechanism of remanufacturing forming layer after quenching heat treatment and substrate is a mixture of adhesive wear and abrasive wear under the fretting wear condition of test temperature 100℃and humidity 35%~45%.The lamellar abscission area on the surface of the substrate worn sample is larger,and the abrasion loss of the substrate is greater than that of the quenched forming layer,which illustrates that fretting tribological properties of the quenched forming layer is preceded to the substrate.And the self-developed cored wire is suitable for remanufacturing on the surface of joint sleeve of cardan axis to prolong its service life.