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采用有限元法计算了高频感应熔覆NiCrBSi涂层的基体和界面在不同工艺参数下的温度分布,并采用高频感应加热技术在抽油杆钢35CrMo表面制备NiCrBSi涂层。模拟结果表明,在感应加热频率105 Hz,感应加热电流1400 A,感应加热时间14 s时,涂层达到了NiCrBSi的熔点1100℃,此时抽油杆与镍基涂层形成了冶金结合。通过对熔覆层组织形貌观察及相结构分析,验证了模拟结果的准确性和可靠性,为高频感应熔覆工艺参数的优化提供了理论依据。
The temperature distribution of matrix and interface of high frequency induction cladding NiCrBSi coating under different process parameters was calculated by finite element method. The NiCrBSi coating was prepared on the surface of 35CrMo sucker rod steel by high frequency induction heating. The simulation results show that the coating reaches the melting point of NiCrBSi 1100 ℃ at the induction heating frequency of 105 Hz, the induction heating current of 1400 A and the induction heating time of 14 s. At this time, the sucker rod and the nickel-based coating form a metallurgical bond. Through the observation of the microstructure and the phase structure analysis, the accuracy and reliability of the simulation results are verified, which provides a theoretical basis for the optimization of the technological parameters of high frequency induction cladding.