【摘要】 应用感应加热原理和傅立叶导热定律对高频熔覆中锅炉管壁和合金层的温度场进行模拟计算,分析不同熔覆参数下锅炉管及合金层温度场随时间的变化规律;并对锅炉管表面进行熔覆实验研究。结果表明,在熔覆工作头和管的结构及参数给定的条件下,感应加热速度主要受高频感应加热电源频率和熔覆电流的影响。在一定范围内,感应加热电源的频率越高,或熔覆电流越大,则锅炉管表面升温速度越快,熔覆结束时管内壁温度越低,基体受热影响越小;当频率为250 kHz、熔覆电流为1 180A时,熔覆层与基体间有明显的白亮过渡带,形成了冶金结合。更多还原

【Abstract】 Induction heating and Fourier heat conduction principles were used to simulate the temperature field of the boiler tube and alloy layer. The changing law of the temperature field under different cladding parameters was researched,and the cladding experiments were carried out on the surface of the boiler tube. The results show that the efficiency of the induction cladding is mainly influenced by power frequency and electric current. The heating rate of the boiler tube’s surface increases with increasing power frequency of induction power source or electric current of cladding. When high frequency cladding process is fixed, the lower the temperature of tube’s inwall is, the less the heating affect on base material is. When the power frequency is 250 kHz and electric current is 1 180 A, the transitional zone exits in the zone between the cladding layer and the matrix and forms metallurgical bouding.更多还原