粉末冶金材料科学与工程
粉末冶金材料科學與工程
분말야금재료과학여공정
POWDER METALLURGY MATERIALS SCIENCE AND ENGINEERING
2013年
5期
639-646
,共8页
岑虎%王云山%雷剑波%孟庆若%刘少军
岑虎%王雲山%雷劍波%孟慶若%劉少軍
잠호%왕운산%뢰검파%맹경약%류소군
高频熔覆%锅炉管%温度场%数值模拟
高頻鎔覆%鍋爐管%溫度場%數值模擬
고빈용복%과로관%온도장%수치모의
high frequency cladding%boiler tube%temperature field%numerical simulation
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1180 A时,熔覆层与基体间有明显的白亮过渡带,形成了冶金结合。
應用感應加熱原理和傅立葉導熱定律對高頻鎔覆中鍋爐管壁和閤金層的溫度場進行模擬計算,分析不同鎔覆參數下鍋爐管及閤金層溫度場隨時間的變化規律;併對鍋爐管錶麵進行鎔覆實驗研究。結果錶明,在鎔覆工作頭和管的結構及參數給定的條件下,感應加熱速度主要受高頻感應加熱電源頻率和鎔覆電流的影響。在一定範圍內,感應加熱電源的頻率越高,或鎔覆電流越大,則鍋爐管錶麵升溫速度越快,鎔覆結束時管內壁溫度越低,基體受熱影響越小;噹頻率為250 kHz、鎔覆電流為1180 A時,鎔覆層與基體間有明顯的白亮過渡帶,形成瞭冶金結閤。
응용감응가열원리화부립협도열정률대고빈용복중과로관벽화합금층적온도장진행모의계산,분석불동용복삼수하과로관급합금층온도장수시간적변화규률;병대과로관표면진행용복실험연구。결과표명,재용복공작두화관적결구급삼수급정적조건하,감응가열속도주요수고빈감응가열전원빈솔화용복전류적영향。재일정범위내,감응가열전원적빈솔월고,혹용복전류월대,칙과로관표면승온속도월쾌,용복결속시관내벽온도월저,기체수열영향월소;당빈솔위250 kHz、용복전류위1180 A시,용복층여기체간유명현적백량과도대,형성료야금결합。
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.