| CHEN Jipeng,WANG Ji'an,ZHOU Hongping.Preparation of Hard WC Alloy Coatings on Rotary Tiller Blade Surface Using Arc Spraying Technology[J],53(15):234-241, 251 |
| Preparation of Hard WC Alloy Coatings on Rotary Tiller Blade Surface Using Arc Spraying Technology |
| Received:September 18, 2023 Revised:December 20, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.15.022 |
| KeyWord:rotary tiller blade arc spraying tungsten carbide coating process characteristics |
| Author | Institution |
| CHEN Jipeng |
School of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing , China |
| WANG Ji'an |
School of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing , China |
| ZHOU Hongping |
School of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The rotary tiller blade plays a pivotal role as a crucial component of agricultural machinery. "Hard surface with a tough core" is the key to manufacturing high-performance rotary tiller blades. This work attempted to employ arc spraying to directly prepare alloy coatings containing hard tungsten carbide (WC) on the surface of rotary tiller blades to improve their comprehensive mechanical properties. 65Mn, a commonly used manufacturing material for rotary tillers, was used as the substrate, and alloy materials containing WC particles were used as electrode wires. The experimental platform for arc spraying was established. The experimental platform included an arc spraying device (CMD-AS400), a 6-axis robotic arm (Yaskawa DX100), and an air compression system. In the experiment, the air pressure was set to 0.6 MPa and the distance from the nozzle to the workpiece was set to 150 mm. To investigate the effects of key factors such as spray voltage, wire feed speed, and scanning speed on the coating preparation process, three factor two level factorial experiments were designed. Among them, the high level of spray voltage was 40 V, and the low level was 20 V; The high level of wire feed rate was 50 mm/s, and the low level was 30 mm/s; The high level of scanning speed was 40 mm/s, and the low level was 20 mm/s. The experimental results showed that when the spray voltage was 30 V, the wire feed speed was 40 mm/s, and the scanning speed was 30 mm/s, the deposition rate was as high as 174.7 g/min, and the average hardness could reach HRC51. Furthermore, test results such as scanning electron microscopy (SEM) and energy disperse spectroscopy (EDS) indicated that the alloy coating had a typical layered structure, with a uniform and dense structure, and a good mechanical bonding between the coating and the substrate cross section. The surface of the prepared coating was smooth and flat, without macroscopic cracks or visible defects. Based on the optimized process parameters, a rotary tiller blade sample with a hard alloy coating was successfully prepared on the surface, providing new ideas and methods for the preparation of high-performance rotary tiller blades. |
| Close |
|
|
|